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[NTOS:MM] Make MiIsEntireRangeCommitted 64-bits aware

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Jérôme Gardou 2021-05-26 10:25:51 +02:00 committed by Jérôme Gardou
parent 8bfba59b3e
commit 3aa346c21f
1 changed files with 89 additions and 9 deletions
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98
ntoskrnl/mm/ARM3/virtual.c
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@ -2008,19 +2008,87 @@ MiIsEntireRangeCommitted(IN ULONG_PTR StartingAddress,
{
PMMPTE PointerPte, LastPte;
PMMPDE PointerPde;
BOOLEAN OnBoundary = TRUE;
BOOLEAN OnPdeBoundary = TRUE;
#if _MI_PAGING_LEVELS >= 3
PMMPPE PointerPpe;
BOOLEAN OnPpeBoundary = TRUE;
#if _MI_PAGING_LEVELS == 4
PMMPXE PointerPxe;
BOOLEAN OnPxeBoundary = TRUE;
#endif
#endif
PAGED_CODE();
/* Get the PDE and PTE addresses */
PointerPde = MiAddressToPde(StartingAddress);
/* Check that we hols the right locks */
ASSERT(PsGetCurrentThread()->OwnsProcessWorkingSetExclusive || PsGetCurrentThread()->OwnsProcessWorkingSetShared);
/* Get the PTE addresses */
PointerPte = MiAddressToPte(StartingAddress);
LastPte = MiAddressToPte(EndingAddress);
/* Loop all the PTEs */
while (PointerPte <= LastPte)
{
/* Check if we've hit an new PDE boundary */
if (OnBoundary)
#if _MI_PAGING_LEVELS == 4
/* Check for new PXE boundary */
if (OnPxeBoundary)
{
PointerPxe = MiPteToPxe(PointerPte);
/* Check that this loop is sane */
ASSERT(OnPpeBoundary);
ASSERT(OnPdeBoundary);
if (PointerPxe->u.Long != 0)
{
/* Make it valid if needed */
if (PointerPxe->u.Hard.Valid == 0)
MiMakeSystemAddressValid(MiPteToPpe(PointerPte), Process);
}
else
{
/* Is the entire VAD committed? If not, fail */
if (!Vad->u.VadFlags.MemCommit) return FALSE;
PointerPxe++;
PointerPte = MiPxeToPte(PointerPte);
continue;
}
}
#endif
#if _MI_PAGING_LEVELS >= 3
/* Check for new PPE boundary */
if (OnPpeBoundary)
{
PointerPpe = MiPteToPpe(PointerPte);
/* Check that this loop is sane */
ASSERT(OnPdeBoundary);
if (PointerPpe->u.Long != 0)
{
/* Make it valid if needed */
if (PointerPpe->u.Hard.Valid == 0)
MiMakeSystemAddressValid(MiPteToPde(PointerPte), Process);
}
else
{
/* Is the entire VAD committed? If not, fail */
if (!Vad->u.VadFlags.MemCommit) return FALSE;
PointerPpe++;
PointerPte = MiPpeToPte(PointerPpe);
#if _MI_PAGING_LEVELS == 4
OnPxeBoundary = MiIsPteOnPxeBoundary(PointerPte);
#endif
continue;
}
}
#endif
/* Check if we've hit a new PDE boundary */
if (OnPdeBoundary)
{
/* Is this PDE demand zero? */
PointerPde = MiPteToPde(PointerPte);
@ -2035,12 +2103,18 @@ MiIsEntireRangeCommitted(IN ULONG_PTR StartingAddress,
}
else
{
/* Is the entire VAD committed? If not, fail */
if (!Vad->u.VadFlags.MemCommit) return FALSE;
/* The PTE was already valid, so move to the next one */
PointerPde++;
PointerPte = MiPdeToPte(PointerPde);
/* Is the entire VAD committed? If not, fail */
if (!Vad->u.VadFlags.MemCommit) return FALSE;
#if _MI_PAGING_LEVELS >= 3
OnPpeBoundary = MiIsPteOnPpeBoundary(PointerPte);
#if _MI_PAGING_LEVELS == 4
OnPxeBoundary = MiIsPteOnPxeBoundary(PointerPte);
#endif
#endif
/* New loop iteration with our new, on-boundary PTE. */
continue;
@ -2068,7 +2142,13 @@ MiIsEntireRangeCommitted(IN ULONG_PTR StartingAddress,
/* Move to the next PTE */
PointerPte++;
OnBoundary = MiIsPteOnPdeBoundary(PointerPte);
OnPdeBoundary = MiIsPteOnPdeBoundary(PointerPte);
#if _MI_PAGING_LEVELS >= 3
OnPpeBoundary = MiIsPteOnPpeBoundary(PointerPte);
#if _MI_PAGING_LEVELS == 4
OnPxeBoundary = MiIsPteOnPxeBoundary(PointerPte);
#endif
#endif
}
/* All PTEs seem valid, and no VAD checks failed, the range is okay */