NTSTATUS NTAPI MmCreateVirtualMappingUnsafe	(	PEPROCESS	Process,
		PVOID	Address,
		ULONG	flProtect,
		PPFN_NUMBER	Pages,
		ULONG	PageCount
	)
Definition at line 1727 of file pagepae.c.
{
   ULONG Attributes;
   PVOID Addr;
   ULONG i;
   ULONG oldPdeOffset, PdeOffset;
   BOOLEAN NoExecute = FALSE;

   DPRINT("MmCreateVirtualMappingUnsafe(%x, %x, %x, %x (%x), %d)\n",
          Process, Address, flProtect, Pages, *Pages, PageCount);

   if (Process == NULL)
   {
      if (Address < MmSystemRangeStart)
      {
         DPRINT1("No process\n");
         ASSERT(FALSE);
      }
      if (PageCount > 0x10000 ||
          (ULONG_PTR) Address / PAGE_SIZE + PageCount > 0x100000)
      {
         DPRINT1("Page count to large\n");
         ASSERT(FALSE);
      }
   }
   else
   {
      if (Address >= MmSystemRangeStart)
      {
         DPRINT1("Setting kernel address with process context\n");
         ASSERT(FALSE);
      }
      if (PageCount > (ULONG_PTR)MmSystemRangeStart / PAGE_SIZE ||
          (ULONG_PTR) Address / PAGE_SIZE + PageCount >
          (ULONG_PTR)MmSystemRangeStart / PAGE_SIZE)
      {
         DPRINT1("Page Count to large\n");
         ASSERT(FALSE);
      }
   }

   Attributes = ProtectToPTE(flProtect);
   if (Attributes & 0x80000000)
   {
      NoExecute = TRUE;
   }
   Attributes &= 0xfff;
   if (Address >= MmSystemRangeStart)
   {
      Attributes &= ~PA_USER;
      if (Ke386GlobalPagesEnabled)
      {
         Attributes |= PA_GLOBAL;
      }
   }
   else
   {
      Attributes |= PA_USER;
   }

   Addr = Address;

   if (Ke386Pae)
   {
      ULONGLONG Pte, tmpPte;
      PULONGLONG Pt = NULL;

      oldPdeOffset = PAE_ADDR_TO_PDE_OFFSET(Addr) + 1;
      for (i = 0; i < PageCount; i++, Addr = (PVOID)((ULONG_PTR)Addr + PAGE_SIZE))
      {
         if (!(Attributes & PA_PRESENT) && Pages[i] != 0)
         {
            DPRINT1("Setting physical address but not allowing access at address "
                    "0x%.8X with attributes %x/%x.\n",
                    Addr, Attributes, flProtect);
            ASSERT(FALSE);
         }
         PdeOffset = PAE_ADDR_TO_PDE_OFFSET(Addr);
         if (oldPdeOffset != PdeOffset)
         {
            MmUnmapPageTable((PULONG)Pt);
            Pt = MmGetPageTableForProcessForPAE(Process, Addr, TRUE);
            if (Pt == NULL)
            {
               ASSERT(FALSE);
            }
         }
         else
         {
            Pt++;
         }
         oldPdeOffset = PdeOffset;

         MmMarkPageMapped(Pages[i]);
         tmpPte = PAE_PFN_TO_PTE(Pages[i]) | Attributes;
         if (NoExecute)
         {
            tmpPte |= 0x8000000000000000LL;
         }
         Pte = ExfpInterlockedExchange64UL(Pt, &tmpPte);
         if (PAE_PAGE_MASK((Pte)) != 0LL && !((Pte) & PA_PRESENT))
         {
            ASSERT(FALSE);
         }
         if (PAE_PAGE_MASK((Pte)) != 0LL)
         {
            MmMarkPageUnmapped(PAE_PTE_TO_PFN((Pte)));
         }
         if (Address < MmSystemRangeStart &&
             ((PMADDRESS_SPACE)&Process->VadRoot)->PageTableRefCountTable != NULL &&
             Attributes & PA_PRESENT)
         {
            PUSHORT Ptrc;

            Ptrc = ((PMADDRESS_SPACE)&Process->VadRoot)->PageTableRefCountTable;

            Ptrc[PAE_ADDR_TO_PAGE_TABLE(Addr)]++;
         }
         if (Pte != 0LL)
         {
            if (Address > MmSystemRangeStart ||
                (Pt >= (PULONGLONG)PAGETABLE_MAP && Pt < (PULONGLONG)PAGETABLE_MAP + 4*512*512))
            {
              MiFlushTlb((PULONG)Pt, Address);
            }
         }
      }
      if (Addr > Address)
      {
         MmUnmapPageTable((PULONG)Pt);
      }
   }
   else
   {
      PULONG Pt = NULL;
      ULONG Pte;
      oldPdeOffset = ADDR_TO_PDE_OFFSET(Addr) + 1;
      for (i = 0; i < PageCount; i++, Addr = (PVOID)((ULONG_PTR)Addr + PAGE_SIZE))
      {
         if (!(Attributes & PA_PRESENT) && Pages[i] != 0)
         {
            DPRINT1("Setting physical address but not allowing access at address "
                    "0x%.8X with attributes %x/%x.\n",
                    Addr, Attributes, flProtect);
            ASSERT(FALSE);
         }
         PdeOffset = ADDR_TO_PDE_OFFSET(Addr);
         if (oldPdeOffset != PdeOffset)
         {
            MmUnmapPageTable(Pt);
            Pt = MmGetPageTableForProcess(Process, Addr, TRUE);
            if (Pt == NULL)
            {
               ASSERT(FALSE);
            }
         }
         else
         {
            Pt++;
         }
         oldPdeOffset = PdeOffset;

         Pte = *Pt;
         MmMarkPageMapped(Pages[i]);
         if (PAGE_MASK((Pte)) != 0 && !((Pte) & PA_PRESENT))
         {
            ASSERT(FALSE);
         }
         if (PAGE_MASK((Pte)) != 0)
         {
            MmMarkPageUnmapped(PTE_TO_PFN((Pte)));
         }
         (void)InterlockedExchangeUL(Pt, PFN_TO_PTE(Pages[i]) | Attributes);
         if (Address < MmSystemRangeStart &&
             ((PMADDRESS_SPACE)&Process->VadRoot)->PageTableRefCountTable != NULL &&
             Attributes & PA_PRESENT)
         {
            PUSHORT Ptrc;

            Ptrc = ((PMADDRESS_SPACE)&Process->VadRoot)->PageTableRefCountTable;

            Ptrc[ADDR_TO_PAGE_TABLE(Addr)]++;
         }
         if (Pte != 0)
         {
            if (Address > MmSystemRangeStart ||
                (Pt >= (PULONG)PAGETABLE_MAP && Pt < (PULONG)PAGETABLE_MAP + 1024*1024))
            {
               MiFlushTlb(Pt, Address);
            }
         }
      }
      if (Addr > Address)
      {
         MmUnmapPageTable(Pt);
      }
   }
   return(STATUS_SUCCESS);
}
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