thomas/mittos64
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

VMM - free_page does not unset P2 entry if P1 is not empty

Browse Source
This commit is contained in:
Thomas Lovén
2018-01-03 14:16:02 +01:00
parent 96a877c95b
commit ce937c8088
2 changed files with 28 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
src/kernel/memory/vmm.c
View File

@@ -98,21 +98,28 @@ int touch_page(void *P4, uintptr_t addr, uint16_t flags)
void free_page(void *P4, uintptr_t addr, int free)
{
(void)free;
if(!page_exists(P4, addr))
return;
P1e(P4, addr).value = 0;
if(!free) return;
union PTE *pt;
pt = PT(P2e(P4, addr).value);
for(int i = 0; i < ENTRIES_PER_PT; i++)
if(pt[i].value)
return;
pmm_free(MASK_FLAGS(P2e(P4, addr).value));
P2e(P4, addr).value = 0;
if(P2e(P4, addr).huge)
{
P2e(P4, addr).value = 0;
if(!free) return;
} else {
P1e(P4, addr).value = 0;
if(!free) return;
pt = PT(P2e(P4, addr).value);
for(int i = 0; i < ENTRIES_PER_PT; i++)
if(pt[i].value)
return;
pmm_free(MASK_FLAGS(P2e(P4, addr).value));
P2e(P4, addr).value = 0;
}
pt = PT(P3e(P4, addr).value);
for(int i = 0; i < ENTRIES_PER_PT; i++)