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authorpk <pk@NetBSD.org>2000-04-14 14:14:47 +0000
committerpk <pk@NetBSD.org>2000-04-14 14:14:47 +0000
commitcd955cb171ff62cfc789dbc1958de9c6de311f7a (patch)
treed1e3e65f3b62b0f7ecc7037277057b2c49d4a43f /sys
parent017ca78459fd88a78fe99e6b927e71247d494de3 (diff)
dvma_init: avoid integer variable overflow
Diffstat (limited to 'sys')
-rw-r--r--sys/arch/sparc/stand/common/dvma.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/sys/arch/sparc/stand/common/dvma.c b/sys/arch/sparc/stand/common/dvma.c
index 70a850c3371..7b9c3baf12e 100644
--- a/sys/arch/sparc/stand/common/dvma.c
+++ b/sys/arch/sparc/stand/common/dvma.c
@@ -1,4 +1,4 @@
-/* $NetBSD: dvma.c,v 1.5 2000/02/15 14:09:59 pk Exp $ */
+/* $NetBSD: dvma.c,v 1.6 2000/04/14 14:14:47 pk Exp $ */
/*
* Copyright (c) 1995 Gordon W. Ross
* All rights reserved.
@@ -59,14 +59,17 @@ static int base_va;
void
dvma_init()
{
- int segva, dmava;
+ u_int segva, dmava;
+ int nseg;
extern int start;
/* Align our address base with the DVMA segment */
+ dmava = DVMA_BASE;
base_va = segva = ((int)&start) & DVMA_BASE;
/* Then double-map the DVMA adresses */
- for (dmava = DVMA_BASE; dmava < DVMA_BASE + DVMA_MAPLEN; ) {
+ nseg = (DVMA_MAPLEN + NBPSG - 1) >> SGSHIFT;
+ while (nseg-- > 0) {
setsegmap(dmava, getsegmap(segva));
segva += NBPSG;
dmava += NBPSG;