Author: markj
Date: Thu May 21 15:18:59 2020
New Revision: 361333
URL: https://svnweb.freebsd.org/changeset/base/361333
Log:
MFC r361031:
Assert that page table traversal functions don't operate on superpages.
Modified:
stable/12/sys/amd64/amd64/pmap.c
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/sys/amd64/amd64/pmap.c
==============================================================================
--- stable/12/sys/amd64/amd64/pmap.c Thu May 21 15:15:50 2020
(r361332)
+++ stable/12/sys/amd64/amd64/pmap.c Thu May 21 15:18:59 2020
(r361333)
@@ -1243,6 +1243,8 @@ pmap_pdpe_to_pde(pdp_entry_t *pdpe, vm_offset_t va)
{
pd_entry_t *pde;
+ KASSERT((*pdpe & PG_PS) == 0,
+ ("%s: pdpe %#lx is a leaf", __func__, *pdpe));
pde = (pd_entry_t *)PHYS_TO_DMAP(*pdpe & PG_FRAME);
return (&pde[pmap_pde_index(va)]);
}
@@ -1267,6 +1269,8 @@ pmap_pde_to_pte(pd_entry_t *pde, vm_offset_t va)
{
pt_entry_t *pte;
+ KASSERT((*pde & PG_PS) == 0,
+ ("%s: pde %#lx is a leaf", __func__, *pde));
pte = (pt_entry_t *)PHYS_TO_DMAP(*pde & PG_FRAME);
return (&pte[pmap_pte_index(va)]);
}
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