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PR/50228: Christian Groessler: fix bzero(ptr, 0) on ppc. Check for 0 length 

before jumping to cb_memset like memset does.
This commit is contained in:
christos 2016-12-19 14:30:23 +00:00
parent 01c3d3dc7f
commit 116a2064fe
1 changed files with 4 additions and 2 deletions
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6
lib/libc/arch/powerpc/string/bzero.S
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@ -1,4 +1,4 @@
/* $NetBSD: bzero.S,v 1.14 2013/09/12 15:36:15 joerg Exp $ */
/* $NetBSD: bzero.S,v 1.15 2016/12/19 14:30:23 christos Exp $ */
/*-
* Copyright (C) 2001 Martin J. Laubach <mjl@NetBSD.org>
@ -32,7 +32,7 @@
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: bzero.S,v 1.14 2013/09/12 15:36:15 joerg Exp $")
__RCSID("$NetBSD: bzero.S,v 1.15 2016/12/19 14:30:23 christos Exp $")
#endif /* LIBC_SCCS && !lint */
#include "assym.h"
@ -54,6 +54,8 @@ __RCSID("$NetBSD: bzero.S,v 1.14 2013/09/12 15:36:15 joerg Exp $")
.align 4
ENTRY(bzero)
li r_val, 0 /* Value to stuff in */
cmplwi %cr1, %r4, 0 /* Zero length? */
beqlr- %cr1 /* Yes, do nothing */
b cb_memset
END(bzero)