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[NTOSKRNL]

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Handle 3 and 4 level page tables in MmArmAccessFault

svn path=/trunk/; revision=55462
This commit is contained in:
Timo Kreuzer
2012-02-06 15:08:32 +00:00
parent 1374772ff7
commit 60f4720280
1 changed files with 43 additions and 12 deletions
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reactos/ntoskrnl/mm/ARM3/pagfault.c
+43 -12
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@@ -181,6 +181,13 @@ MiCheckPdeForPagedPool(IN PVOID Address)
//
return Status;
}
#else
NTSTATUS
FASTCALL
MiCheckPdeForPagedPool(IN PVOID Address)
{
return STATUS_ACCESS_VIOLATION;
}
#endif
VOID
@@ -784,7 +791,6 @@ MmArmAccessFault(IN BOOLEAN StoreInstruction,
CurrentProcess = NULL;
}
/* Acquire the working set lock */
KeRaiseIrql(APC_LEVEL, &LockIrql);
MiLockWorkingSet(CurrentThread, WorkingSet);
@@ -902,16 +908,42 @@ MmArmAccessFault(IN BOOLEAN StoreInstruction,
}
#if (_MI_PAGING_LEVELS == 4)
/* On these systems we have PXEs and PPEs ready for everything we need */
if (PointerPxe->u.Hard.Valid == 0) return STATUS_ACCESS_VIOLATION;
/* Check if the PXE is valid */
if (PointerPxe->u.Hard.Valid == 0)
{
/* Right now, we only handle scenarios where the PXE is totally empty */
ASSERT(PointerPxe->u.Long == 0);
/* Resolve a demand zero fault */
Status = MiResolveDemandZeroFault(PointerPpe,
MM_READWRITE,
CurrentProcess,
MM_NOIRQL);
/* We should come back with a valid PXE */
ASSERT(PointerPxe->u.Hard.Valid == 1);
}
#endif
#if (_MI_PAGING_LEVELS >= 3)
if (PointerPpe->u.Hard.Valid == 0) return STATUS_ACCESS_VIOLATION;
/* Check if the PPE is valid */
if (PointerPpe->u.Hard.Valid == 0)
{
/* Right now, we only handle scenarios where the PPE is totally empty */
ASSERT(PointerPpe->u.Long == 0);
/* Resolve a demand zero fault */
Status = MiResolveDemandZeroFault(PointerPde,
MM_READWRITE,
CurrentProcess,
MM_NOIRQL);
/* We should come back with a valid PPE */
ASSERT(PointerPpe->u.Hard.Valid == 1);
}
#endif
/* First things first, is the PDE valid? */
/* Check if the PDE is valid */
if (PointerPde->u.Hard.Valid == 0)
{
/* Right now, we only handle scenarios where the PDE is totally empty */
@@ -983,12 +1015,11 @@ MmArmAccessFault(IN BOOLEAN StoreInstruction,
return Status;
}
{
/* Add an additional page table reference */
MmWorkingSetList->UsedPageTableEntries[MiGetPdeOffset(Address)]++;
ASSERT(MmWorkingSetList->UsedPageTableEntries[MiGetPdeOffset(Address)] <= PTE_COUNT);
}
#if (_MI_PAGING_LEVELS == 2)
/* Add an additional page table reference */
MmWorkingSetList->UsedPageTableEntries[MiGetPdeOffset(Address)]++;
ASSERT(MmWorkingSetList->UsedPageTableEntries[MiGetPdeOffset(Address)] <= PTE_COUNT);
#endif
/* Did we get a prototype PTE back? */
if (!ProtoPte)