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added some panics to catch the condition where pmap_pte returns null

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- indicating that the page table page is non-resident.
This commit is contained in:
David Greenman 1993-12-13 07:02:27 +00:00
parent fa4700b4f1
commit 6aa5e70134
2 changed files with 18 additions and 2 deletions
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10
sys/amd64/amd64/pmap.c
View File

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)pmap.c 7.7 (Berkeley) 5/12/91
* $Id: pmap.c,v 1.8 1993/11/13 02:25:03 davidg Exp $
* $Id: pmap.c,v 1.9 1993/11/25 01:31:00 wollman Exp $
*/
/*
@ -904,6 +904,8 @@ pmap_enter(pmap, va, pa, prot, wired)
}
pte = pmap_pte(pmap, va);
if (!pte)
panic("non-resident page table page (pmap_enter)");
opa = pmap_pte_pa(pte);
#ifdef DEBUG
if (pmapdebug & PDB_ENTER)
@ -1105,6 +1107,8 @@ pmap_change_wiring(pmap, va, wired)
return;
pte = pmap_pte(pmap, va);
if (!pte)
panic("non-resident page table page (pmap_change_wiring)");
#ifdef DEBUG
/*
* Page table page is not allocated.
@ -1569,6 +1573,8 @@ pmap_testbit(pa, bit)
if (pv->pv_pmap != NULL) {
for (; pv; pv = pv->pv_next) {
pte = (int *) pmap_pte(pv->pv_pmap, pv->pv_va);
if (!pte)
panic("non-resident page table page (pmap_testbit)");
ix = 0;
do {
if (*pte++ & bit) {
@ -1634,6 +1640,8 @@ pmap_changebit(pa, bit, setem)
}
pte = (int *) pmap_pte(pv->pv_pmap, va);
if (!pte)
panic("non-resident page table page (pmap_changebit)");
ix = 0;
do {
if (setem)

10
sys/i386/i386/pmap.c
View File

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)pmap.c 7.7 (Berkeley) 5/12/91
* $Id: pmap.c,v 1.8 1993/11/13 02:25:03 davidg Exp $
* $Id: pmap.c,v 1.9 1993/11/25 01:31:00 wollman Exp $
*/
/*
@ -904,6 +904,8 @@ pmap_enter(pmap, va, pa, prot, wired)
}
pte = pmap_pte(pmap, va);
if (!pte)
panic("non-resident page table page (pmap_enter)");
opa = pmap_pte_pa(pte);
#ifdef DEBUG
if (pmapdebug & PDB_ENTER)
@ -1105,6 +1107,8 @@ pmap_change_wiring(pmap, va, wired)
return;
pte = pmap_pte(pmap, va);
if (!pte)
panic("non-resident page table page (pmap_change_wiring)");
#ifdef DEBUG
/*
* Page table page is not allocated.
@ -1569,6 +1573,8 @@ pmap_testbit(pa, bit)
if (pv->pv_pmap != NULL) {
for (; pv; pv = pv->pv_next) {
pte = (int *) pmap_pte(pv->pv_pmap, pv->pv_va);
if (!pte)
panic("non-resident page table page (pmap_testbit)");
ix = 0;
do {
if (*pte++ & bit) {
@ -1634,6 +1640,8 @@ pmap_changebit(pa, bit, setem)
}
pte = (int *) pmap_pte(pv->pv_pmap, va);
if (!pte)
panic("non-resident page table page (pmap_changebit)");
ix = 0;
do {
if (setem)