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Think-o in pmap_extract4m(), detected by UVM.

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This commit is contained in:
pk 1998-02-14 09:28:52 +00:00
parent 371ff49dd5
commit 0fc808b760
1 changed files with 15 additions and 6 deletions
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21
sys/arch/sparc/sparc/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.112 1998/02/10 14:11:43 mrg Exp $ */
/* $NetBSD: pmap.c,v 1.113 1998/02/14 09:28:52 pk Exp $ */
/*
* Copyright (c) 1996
@ -5901,24 +5901,33 @@ pmap_extract4m(pm, va)
return (0);
}
rm = &pm->pm_regmap[VA_VREG(va)];
if (rm == NULL) {
if ((rm = pm->pm_regmap) == NULL) {
#ifdef DEBUG
if (pmapdebug & PDB_FOLLOW)
printf("pmap_extract: no regmap entry");
#endif
return (0);
}
sm = &rm->rg_segmap[VA_VSEG(va)];
if (sm == NULL) {
rm += VA_VREG(va);
if ((sm = rm->rg_segmap) == NULL) {
#ifdef DEBUG
if (pmapdebug & PDB_FOLLOW)
panic("pmap_extract: no segmap");
#endif
return (0);
}
pte = sm->sg_pte[VA_SUN4M_VPG(va)];
sm += VA_VSEG(va);
if (sm->sg_pte == NULL) {
#ifdef DEBUG
if (pmapdebug & PDB_FOLLOW)
panic("pmap_extract: no ptes");
#endif
return (0);
}
pte = sm->sg_pte[VA_SUN4M_VPG(va)];
if ((pte & SRMMU_TETYPE) != SRMMU_TEPTE) {
#ifdef DEBUG
if (pmapdebug & PDB_FOLLOW)