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When we changed pmap_protect to support adding the writeable

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attribute to a page range, we forgot to set the PG_WRITEABLE
flag in the vm_page_t.  This fixes that problem.
This commit is contained in:
John Dyson 1997-01-11 23:50:42 +00:00
parent 9f2f000c7f
commit b447ce90f5
2 changed files with 26 additions and 16 deletions
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21
sys/amd64/amd64/pmap.c
View file

@ -39,7 +39,7 @@
* SUCH DAMAGE.
*
* from: @(#)pmap.c 7.7 (Berkeley) 5/12/91
* $Id: pmap.c,v 1.132 1996/12/29 02:27:07 dyson Exp $
* $Id: pmap.c,v 1.133 1997/01/11 07:19:02 dyson Exp $
*/
/*
@ -1863,15 +1863,20 @@ pmap_protect(pmap, sva, eva, prot)
unsigned pbits = ptbase[sindex];
if (prot & VM_PROT_WRITE) {
if ((pbits & (PG_RW|PG_V)) == PG_V) {
ptbase[sindex] = pbits | PG_RW;
anychanged = 1;
}
} else if (pbits & PG_RW) {
if (prot & VM_PROT_WRITE) {
if ((pbits & (PG_RW|PG_V)) == PG_V) {
if (pbits & PG_MANAGED) {
vm_page_t m = PHYS_TO_VM_PAGE(pbits);
m->flags |= PG_WRITEABLE;
m->object->flags |= OBJ_WRITEABLE|OBJ_MIGHTBEDIRTY;
}
ptbase[sindex] = pbits | PG_RW;
anychanged = 1;
}
} else if (pbits & PG_RW) {
if (pbits & PG_M) {
vm_offset_t sva = i386_ptob(sindex);
if (pmap_track_modified(sva)) {
if ((pbits & PG_MANAGED) && pmap_track_modified(sva)) {
vm_page_t m = PHYS_TO_VM_PAGE(pbits);
m->dirty = VM_PAGE_BITS_ALL;
}

21
sys/i386/i386/pmap.c
View file

@ -39,7 +39,7 @@
* SUCH DAMAGE.
*
* from: @(#)pmap.c 7.7 (Berkeley) 5/12/91
* $Id: pmap.c,v 1.132 1996/12/29 02:27:07 dyson Exp $
* $Id: pmap.c,v 1.133 1997/01/11 07:19:02 dyson Exp $
*/
/*
@ -1863,15 +1863,20 @@ pmap_protect(pmap, sva, eva, prot)
unsigned pbits = ptbase[sindex];
if (prot & VM_PROT_WRITE) {
if ((pbits & (PG_RW|PG_V)) == PG_V) {
ptbase[sindex] = pbits | PG_RW;
anychanged = 1;
}
} else if (pbits & PG_RW) {
if (prot & VM_PROT_WRITE) {
if ((pbits & (PG_RW|PG_V)) == PG_V) {
if (pbits & PG_MANAGED) {
vm_page_t m = PHYS_TO_VM_PAGE(pbits);
m->flags |= PG_WRITEABLE;
m->object->flags |= OBJ_WRITEABLE|OBJ_MIGHTBEDIRTY;
}
ptbase[sindex] = pbits | PG_RW;
anychanged = 1;
}
} else if (pbits & PG_RW) {
if (pbits & PG_M) {
vm_offset_t sva = i386_ptob(sindex);
if (pmap_track_modified(sva)) {
if ((pbits & PG_MANAGED) && pmap_track_modified(sva)) {
vm_page_t m = PHYS_TO_VM_PAGE(pbits);
m->dirty = VM_PAGE_BITS_ALL;
}