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dvma_init: avoid integer variable overflow

This commit is contained in:
pk 2000-04-14 14:14:47 +00:00
parent 017ca78459
commit cd955cb171
1 changed files with 6 additions and 3 deletions
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9
sys/arch/sparc/stand/common/dvma.c
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@ -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;