NTSTATUS
NTAPI
MmCreateVirtualMappingUnsafe(
PEPROCESS Process,
PVOID Address,
ULONG PageProtection,
PPFN_NUMBER Pages,
ULONG PageCount)
{
ULONG i;
MMPTE TmplPte, *Pte;
ASSERT((ULONG_PTR)Address % PAGE_SIZE == 0);
/* Check if the range is valid */
if ((Process == NULL && Address < MmSystemRangeStart) ||
(Process != NULL && Address > MmHighestUserAddress))
{
DPRINT1("Address 0x%p is invalid for process %p\n", Address, Process);
ASSERT(FALSE);
}
TmplPte.u.Long = 0;
TmplPte.u.Hard.Valid = 1;
MiSetPteProtection(&TmplPte, PageProtection);
TmplPte.u.Flush.Owner = (Address < MmHighestUserAddress) ? 1 : 0;
//__debugbreak();
for (i = 0; i < PageCount; i++)
{
TmplPte.u.Hard.PageFrameNumber = Pages[i];
Pte = MiGetPteForProcess(Process, Address, TRUE);
DPRINT("MmCreateVirtualMappingUnsafe, Address=%p, TmplPte=%p, Pte=%p\n",
Address, TmplPte.u.Long, Pte);
if (InterlockedExchangePte(Pte, TmplPte))
{
KeInvalidateTlbEntry(Address);
}
if (MiIsHyperspaceAddress(Pte))
MmDeleteHyperspaceMapping((PVOID)PAGE_ROUND_DOWN(Pte));
Address = (PVOID)((ULONG64)Address + PAGE_SIZE);
}
return STATUS_SUCCESS;
}
static
ULONG64
MiGetPteValueForProcess(
PEPROCESS Process,
PVOID Address)
{
PMMPTE Pte;
ULONG64 PteValue;
Pte = MiGetPteForProcess(Process, Address, FALSE);
PteValue = Pte ? Pte->u.Long : 0;
if (MiIsHyperspaceAddress(Pte))
MmDeleteHyperspaceMapping((PVOID)PAGE_ROUND_DOWN(Pte));
return PteValue;
}
VOID
NTAPI
MmDeleteVirtualMapping(
PEPROCESS Process,
PVOID Address,
BOOLEAN FreePage,
BOOLEAN* WasDirty,
PPFN_NUMBER Page)
{
PFN_NUMBER Pfn;
PMMPTE Pte;
MMPTE OldPte;
Pte = MiGetPteForProcess(Process, Address, FALSE);
if (Pte)
{
/* Atomically set the entry to zero and get the old value. */
OldPte.u.Long = InterlockedExchange64((LONG64*)&Pte->u.Long, 0);
if (OldPte.u.Hard.Valid)
{
Pfn = OldPte.u.Hard.PageFrameNumber;
//if (FreePage)
//MmReleasePageMemoryConsumer(MC_NPPOOL, Pfn);
}
else
Pfn = 0;
}
else
{
OldPte.u.Long = 0;
Pfn = 0;
}
/* Return information to the caller */
if (WasDirty)
*WasDirty = (BOOLEAN)OldPte.u.Hard.Dirty;;
if (Page)
*Page = Pfn;
MiFlushTlb(Pte, Address);
}
VOID
NTAPI
MmSetPageProtect(PEPROCESS Process, PVOID Address, ULONG flProtect)
{
PMMPTE Pte;
MMPTE NewPte;
Pte = MiGetPteForProcess(Process, Address, FALSE);
ASSERT(Pte != NULL);
NewPte = *Pte;
MiSetPteProtection(&NewPte, flProtect);
InterlockedExchangePte(Pte, NewPte);
MiFlushTlb(Pte, Address);
}
VOID
NTAPI
MmSetDirtyPage(PEPROCESS Process, PVOID Address)
{
PMMPTE Pte;
Pte = MiGetPteForProcess(Process, Address, FALSE);
if (!Pte)
{
KeBugCheckEx(MEMORY_MANAGEMENT, 0x1234, (ULONG64)Address, 0, 0);
}
/* Ckear the dirty bit */
if (InterlockedBitTestAndSet64((PVOID)Pte, 6))
{
if (!MiIsHyperspaceAddress(Pte))
__invlpg(Address);
}
MiFlushTlb(Pte, Address);
}