b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
74 lines
2.7 KiB
ArmAsm
74 lines
2.7 KiB
ArmAsm
/* $NetBSD: strncpy.S,v 1.1 2005/12/20 19:28:49 christos Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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RCSID("from: @(#)strncpy.s 5.1 (Berkeley) 5/12/90")
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#else
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RCSID("$NetBSD: strncpy.S,v 1.1 2005/12/20 19:28:49 christos Exp $")
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#endif
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#endif /* LIBC_SCCS and not lint */
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ENTRY(strncpy)
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movl %sp@(4),%d0 | return value is toaddr
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movl %sp@(12),%d1 | count
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jeq Lscdone | nothing to do
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movl %sp@(8),%a0 | a0 = fromaddr
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movl %d0,%a1 | a1 = toaddr
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subql #1,%d1
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Lscloop:
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movb %a0@+,%a1@+ | copy a byte
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dbeq %d1,Lscloop | loop through low word of d1
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jeq Lscpadding | copied null, padding if necessary
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clrw %d1 | clear low word of d1
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subql #1,%d1 | adjust count for long copies
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jcc Lscloop | more room, keep going
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Lscdone:
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#ifdef __SVR4_ABI__
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moveal %d0,%a0
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#endif
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rts
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Lscploop:
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clrb %a1@+ | clear a byte
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dbra %d1,Lscploop | keep going
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clrw %d1
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Lscpadding:
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subql #1,%d1
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jcc Lscploop
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jra Lscdone
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