pagepae.c File Reference

#include <ntoskrnl.h>
#include <debug.h>

Include dependency graph for pagepae.c:

Go to the source code of this file.

Macros
#define	NDEBUG
#define	PA_BIT_PRESENT   (0)
#define	PA_BIT_READWRITE   (1)
#define	PA_BIT_USER   (2)
#define	PA_BIT_WT   (3)
#define	PA_BIT_CD   (4)
#define	PA_BIT_ACCESSED   (5)
#define	PA_BIT_DIRTY   (6)
#define	PA_BIT_GLOBAL   (8)
#define	PA_PRESENT   (1 << PA_BIT_PRESENT)
#define	PA_READWRITE   (1 << PA_BIT_READWRITE)
#define	PA_USER   (1 << PA_BIT_USER)
#define	PA_DIRTY   (1 << PA_BIT_DIRTY)
#define	PA_WT   (1 << PA_BIT_WT)
#define	PA_CD   (1 << PA_BIT_CD)
#define	PA_ACCESSED   (1 << PA_BIT_ACCESSED)
#define	PA_GLOBAL   (1 << PA_BIT_GLOBAL)
#define	PAGEDIRECTORY_MAP   (0xc0000000 + (PTE_BASE / (1024)))
#define	PAE_PAGEDIRECTORY_MAP   (0xc0000000 + (PTE_BASE / (512)))
#define	HYPERSPACE   (Ke386Pae ? 0xc0800000 : 0xc0400000)
#define	IS_HYPERSPACE(v)   (((ULONG)(v) >= HYPERSPACE && (ULONG)(v) < HYPERSPACE + 0x400000))
#define	PTE_TO_PFN(X)   ((X) >> PAGE_SHIFT)
#define	PFN_TO_PTE(X)   ((X) << PAGE_SHIFT)
#define	PAE_PTE_TO_PFN(X)   (PAE_PAGE_MASK(X) >> PAGE_SHIFT)
#define	PAE_PFN_TO_PTE(X)   ((X) << PAGE_SHIFT)
#define	PAGE_MASK(x)   ((x)&(~0xfff))
#define	PAE_PAGE_MASK(x)   ((x)&(~0xfffLL))
#define	ADDR_TO_PAGE_TABLE(v)   (((ULONG)(v)) / (1024 * PAGE_SIZE))
#define	ADDR_TO_PDE(v)
#define	ADDR_TO_PTE(v)   (PULONG)(PTE_BASE + ((((ULONG)(v) / 1024))&(~0x3)))
#define	ADDR_TO_PDE_OFFSET(v)   ((((ULONG)(v)) / (1024 * PAGE_SIZE)))
#define	ADDR_TO_PTE_OFFSET(v)   ((((ULONG)(v)) % (1024 * PAGE_SIZE)) / PAGE_SIZE)
#define	PAE_ADDR_TO_PAGE_TABLE(v)   (((ULONG)(v)) / (512 * PAGE_SIZE))
#define	PAE_ADDR_TO_PDE(v)
#define	PAE_ADDR_TO_PTE(v)   (PULONGLONG) (PTE_BASE + ((((ULONG_PTR)(v) / 512))&(~0x7)))
#define	PAE_ADDR_TO_PDTE_OFFSET(v)   (((ULONG_PTR)(v)) / (512 * 512 * PAGE_SIZE))
#define	PAE_ADDR_TO_PDE_PAGE_OFFSET(v)   ((((ULONG_PTR)(v)) % (512 * 512 * PAGE_SIZE)) / (512 * PAGE_SIZE))
#define	PAE_ADDR_TO_PDE_OFFSET(v)   (((ULONG_PTR)(v))/ (512 * PAGE_SIZE))
#define	PAE_ADDR_TO_PTE_OFFSET(v)   ((((ULONG_PTR)(v)) % (512 * PAGE_SIZE)) / PAGE_SIZE)

Functions
BOOLEAN	MmUnmapPageTable (PULONG Pt)
ULONG_PTR NTAPI	MiFlushTlbIpiRoutine (ULONG_PTR Address)
VOID	MiFlushTlb (PULONG Pt, PVOID Address)
static ULONG	ProtectToPTE (ULONG flProtect)
BOOLEAN NTAPI	MmCreateProcessAddressSpace (IN ULONG MinWs, IN PEPROCESS Process, IN PLARGE_INTEGER DirectoryTableBase)
VOID NTAPI	MmFreePageTable (PEPROCESS Process, PVOID Address)
static PULONGLONG	MmGetPageTableForProcessForPAE (PEPROCESS Process, PVOID Address, BOOLEAN Create)
static PULONG	MmGetPageTableForProcess (PEPROCESS Process, PVOID Address, BOOLEAN Create)
static ULONGLONG	MmGetPageEntryForProcessForPAE (PEPROCESS Process, PVOID Address)
static ULONG	MmGetPageEntryForProcess (PEPROCESS Process, PVOID Address)
PFN_NUMBER NTAPI	MmGetPfnForProcess (PEPROCESS Process, PVOID Address)
VOID NTAPI	MmDeleteVirtualMapping (PEPROCESS Process, PVOID Address, BOOLEAN *WasDirty, PPFN_NUMBER Page)
VOID NTAPI	MmDeletePageFileMapping (PEPROCESS Process, PVOID Address, SWAPENTRY *SwapEntry)
BOOLEAN	Mmi386MakeKernelPageTableGlobal (PVOID PAddress)
BOOLEAN NTAPI	MmIsDirtyPage (PEPROCESS Process, PVOID Address)
BOOLEAN NTAPI	MmIsPagePresent (PEPROCESS Process, PVOID Address)
BOOLEAN NTAPI	MmIsPageSwapEntry (PEPROCESS Process, PVOID Address)
NTSTATUS NTAPI	MmCreatePageFileMapping (PEPROCESS Process, PVOID Address, SWAPENTRY SwapEntry)
NTSTATUS NTAPI	MmCreateVirtualMappingUnsafe (PEPROCESS Process, PVOID Address, ULONG flProtect, PPFN_NUMBER Pages, ULONG PageCount)
NTSTATUS NTAPI	MmCreateVirtualMapping (PEPROCESS Process, PVOID Address, ULONG flProtect, PPFN_NUMBER Pages, ULONG PageCount)
ULONG NTAPI	MmGetPageProtect (PEPROCESS Process, PVOID Address)
VOID NTAPI	MmSetPageProtect (PEPROCESS Process, PVOID Address, ULONG flProtect)
VOID NTAPI	MmInitGlobalKernelPageDirectory (VOID)

Variables
static ULONG	MmGlobalKernelPageDirectory [1024]
static ULONGLONG	MmGlobalKernelPageDirectoryForPAE [2048]
BOOLEAN	Ke386Pae
BOOLEAN	Ke386NoExecute

Macro Definition Documentation

ADDR_TO_PAGE_TABLE

#define ADDR_TO_PAGE_TABLE

(

v

)

(((ULONG)(v)) / (1024 * PAGE_SIZE))

Definition at line 150 of file pagepae.c.

ADDR_TO_PDE

#define ADDR_TO_PDE

(

v

)

Value:

                                (PULONG)(PAGEDIRECTORY_MAP + \
                                ((((ULONG)(v)) / (1024 * 1024))&(~0x3)))

Definition at line 152 of file pagepae.c.

ADDR_TO_PDE_OFFSET

#define ADDR_TO_PDE_OFFSET

(

v

)

((((ULONG)(v)) / (1024 * PAGE_SIZE)))

Definition at line 156 of file pagepae.c.

ADDR_TO_PTE

#define ADDR_TO_PTE

(

v

)

(PULONG)(PTE_BASE + ((((ULONG)(v) / 1024))&(~0x3)))

Definition at line 154 of file pagepae.c.

ADDR_TO_PTE_OFFSET

#define ADDR_TO_PTE_OFFSET

(

v

)

((((ULONG)(v)) % (1024 * PAGE_SIZE)) / PAGE_SIZE)

Definition at line 158 of file pagepae.c.

HYPERSPACE

#define HYPERSPACE   (Ke386Pae ? 0xc0800000 : 0xc0400000)

Definition at line 39 of file pagepae.c.

IS_HYPERSPACE

#define IS_HYPERSPACE

(

v

)

(((ULONG)(v) >= HYPERSPACE && (ULONG)(v) < HYPERSPACE + 0x400000))

Definition at line 40 of file pagepae.c.

NDEBUG

#define NDEBUG

Definition at line 13 of file pagepae.c.

PA_ACCESSED

#define PA_ACCESSED   (1 << PA_BIT_ACCESSED)

Definition at line 33 of file pagepae.c.

PA_BIT_ACCESSED

#define PA_BIT_ACCESSED   (5)

Definition at line 23 of file pagepae.c.

PA_BIT_CD

#define PA_BIT_CD   (4)

Definition at line 22 of file pagepae.c.

PA_BIT_DIRTY

#define PA_BIT_DIRTY   (6)

Definition at line 24 of file pagepae.c.

PA_BIT_GLOBAL

#define PA_BIT_GLOBAL   (8)

Definition at line 25 of file pagepae.c.

PA_BIT_PRESENT

#define PA_BIT_PRESENT   (0)

Definition at line 18 of file pagepae.c.

PA_BIT_READWRITE

#define PA_BIT_READWRITE   (1)

Definition at line 19 of file pagepae.c.

PA_BIT_USER

#define PA_BIT_USER   (2)

Definition at line 20 of file pagepae.c.

PA_BIT_WT

#define PA_BIT_WT   (3)

Definition at line 21 of file pagepae.c.

PA_CD

#define PA_CD   (1 << PA_BIT_CD)

Definition at line 32 of file pagepae.c.

PA_DIRTY

#define PA_DIRTY   (1 << PA_BIT_DIRTY)

Definition at line 30 of file pagepae.c.

PA_GLOBAL

#define PA_GLOBAL   (1 << PA_BIT_GLOBAL)

Definition at line 34 of file pagepae.c.

PA_PRESENT

#define PA_PRESENT   (1 << PA_BIT_PRESENT)

Definition at line 27 of file pagepae.c.

PA_READWRITE

#define PA_READWRITE   (1 << PA_BIT_READWRITE)

Definition at line 28 of file pagepae.c.

PA_USER

#define PA_USER   (1 << PA_BIT_USER)

Definition at line 29 of file pagepae.c.

PA_WT

#define PA_WT   (1 << PA_BIT_WT)

Definition at line 31 of file pagepae.c.

PAE_ADDR_TO_PAGE_TABLE

#define PAE_ADDR_TO_PAGE_TABLE

(

v

)

(((ULONG)(v)) / (512 * PAGE_SIZE))

Definition at line 161 of file pagepae.c.

PAE_ADDR_TO_PDE

#define PAE_ADDR_TO_PDE

(

v

)

Value:

                                                  (PULONGLONG) (PAE_PAGEDIRECTORY_MAP + \
                                                  ((((ULONG_PTR)(v)) / (512 * 512))&(~0x7)))

Definition at line 163 of file pagepae.c.

PAE_ADDR_TO_PDE_OFFSET

#define PAE_ADDR_TO_PDE_OFFSET

(

v

)

(((ULONG_PTR)(v))/ (512 * PAGE_SIZE))

Definition at line 172 of file pagepae.c.

PAE_ADDR_TO_PDE_PAGE_OFFSET

#define PAE_ADDR_TO_PDE_PAGE_OFFSET

(

v

)

((((ULONG_PTR)(v)) % (512 * 512 * PAGE_SIZE)) / (512 * PAGE_SIZE))

Definition at line 170 of file pagepae.c.

PAE_ADDR_TO_PDTE_OFFSET

#define PAE_ADDR_TO_PDTE_OFFSET

(

v

)

(((ULONG_PTR)(v)) / (512 * 512 * PAGE_SIZE))

Definition at line 168 of file pagepae.c.

PAE_ADDR_TO_PTE

#define PAE_ADDR_TO_PTE

(

v

)

(PULONGLONG) (PTE_BASE + ((((ULONG_PTR)(v) / 512))&(~0x7)))

Definition at line 165 of file pagepae.c.

PAE_ADDR_TO_PTE_OFFSET

#define PAE_ADDR_TO_PTE_OFFSET

(

v

)

((((ULONG_PTR)(v)) % (512 * PAGE_SIZE)) / PAGE_SIZE)

Definition at line 174 of file pagepae.c.

PAE_PAGE_MASK

#define PAE_PAGE_MASK

(

x

)

((x)&(~0xfffLL))

Definition at line 52 of file pagepae.c.

PAE_PAGEDIRECTORY_MAP

#define PAE_PAGEDIRECTORY_MAP   (0xc0000000 + (PTE_BASE / (512)))

Definition at line 37 of file pagepae.c.

PAE_PFN_TO_PTE

#define PAE_PFN_TO_PTE

(

X

)

((X) << PAGE_SHIFT)

Definition at line 49 of file pagepae.c.

PAE_PTE_TO_PFN

#define PAE_PTE_TO_PFN

(

X

)

(PAE_PAGE_MASK(X) >> PAGE_SHIFT)

Definition at line 48 of file pagepae.c.

PAGE_MASK

#define PAGE_MASK

(

x

)

((x)&(~0xfff))

Definition at line 51 of file pagepae.c.

PAGEDIRECTORY_MAP

#define PAGEDIRECTORY_MAP   (0xc0000000 + (PTE_BASE / (1024)))

Definition at line 36 of file pagepae.c.

PFN_TO_PTE

#define PFN_TO_PTE

(

X

)

((X) << PAGE_SHIFT)

Definition at line 46 of file pagepae.c.

PTE_TO_PFN

#define PTE_TO_PFN

(

X

)

((X) >> PAGE_SHIFT)

Definition at line 45 of file pagepae.c.

Function Documentation

MiFlushTlb()

VOID MiFlushTlb	(	PULONG	Pt,
		PVOID	Address
	)

Definition at line 81 of file pagepae.c.

{
#ifdef CONFIG_SMP
   if (Pt)
   {
      MmUnmapPageTable(Pt);
   }
   if (KeNumberProcessors > 1)
   {
      KeIpiGenericCall(MiFlushTlbIpiRoutine, (ULONG_PTR)Address);
   }
   else
   {
      MiFlushTlbIpiRoutine((ULONG_PTR)Address);
   }
#else
   if ((Pt && MmUnmapPageTable(Pt)) || Address >= MmSystemRangeStart)
   {
      __invlpg(Address);
   }
#endif
}

Referenced by MmCreatePageFileMapping(), MmCreateVirtualMappingUnsafe(), MmDeletePageFileMapping(), MmDeleteVirtualMapping(), MmFreePageTable(), and MmSetPageProtect().

MiFlushTlbIpiRoutine()

ULONG_PTR NTAPI MiFlushTlbIpiRoutine

(

ULONG_PTR

Address

)

Definition at line 63 of file pagepae.c.

{
   if (Address == (ULONGLONG)-1)
   {
      KeFlushCurrentTb();
   }
   else if (Address == (ULONGLONG)-2)
   {
      KeFlushCurrentTb();
   }
   else
   {
       __invlpg((PVOID)Address);
   }
   return 0;
}

Referenced by MiFlushTlb().

MmCreatePageFileMapping()

NTSTATUS NTAPI MmCreatePageFileMapping	(	PEPROCESS	Process,
		PVOID	Address,
		SWAPENTRY	SwapEntry
	)

Definition at line 932 of file pagepae.c.

{
   if (Process == NULL && Address < MmSystemRangeStart)
   {
      DPRINT1("No process\n");
      ASSERT(FALSE);
   }
   if (Process != NULL && Address >= MmSystemRangeStart)
   {
      DPRINT1("Setting kernel address with process context\n");
      ASSERT(FALSE);
   }
   if (SwapEntry & (1 << 31))
   {
      ASSERT(FALSE);
   }
 
   if (Ke386Pae)
   {
      PULONGLONG Pt;
      ULONGLONG Pte;
      ULONGLONG tmpPte;
 
      Pt = MmGetPageTableForProcessForPAE(Process, Address, TRUE);
      if (Pt == NULL)
      {
         ASSERT(FALSE);
      }
      tmpPte = SwapEntry << 1;
      Pte = ExfpInterlockedExchange64UL(Pt, &tmpPte);
      if (PAE_PAGE_MASK((Pte)) != 0)
      {
         MmMarkPageUnmapped(PAE_PTE_TO_PFN((Pte)));
      }
 
      if (Pte != 0)
      {
         MiFlushTlb((PULONG)Pt, Address);
      }
      else
      {
         MmUnmapPageTable((PULONG)Pt);
      }
   }
   else
   {
      PULONG Pt;
      ULONG Pte;
 
      Pt = MmGetPageTableForProcess(Process, Address, TRUE);
      if (Pt == NULL)
      {
         ASSERT(FALSE);
      }
      Pte = *Pt;
      if (PAGE_MASK((Pte)) != 0)
      {
         MmMarkPageUnmapped(PTE_TO_PFN((Pte)));
      }
      (void)InterlockedExchangeUL(Pt, SwapEntry << 1);
      if (Pte != 0)
      {
         MiFlushTlb(Pt, Address);
      }
      else
      {
         MmUnmapPageTable(Pt);
      }
   }
   if (Process != NULL &&
       ((PMADDRESS_SPACE)&Process->VadRoot)->PageTableRefCountTable != NULL &&
       Address < MmSystemRangeStart)
   {
     PUSHORT Ptrc;
     ULONG Idx;
 
     Ptrc = ((PMADDRESS_SPACE)&Process->VadRoot)->PageTableRefCountTable;
     Idx = Ke386Pae ? PAE_ADDR_TO_PAGE_TABLE(Address) : ADDR_TO_PAGE_TABLE(Address);
     Ptrc[Idx]++;
   }
   return(STATUS_SUCCESS);
}

MmCreateProcessAddressSpace()

BOOLEAN NTAPI MmCreateProcessAddressSpace	(	IN ULONG	MinWs,
		IN PEPROCESS	Process,
		IN PLARGE_INTEGER	DirectoryTableBase
	)

Definition at line 178 of file pagepae.c.

{
   NTSTATUS Status;
   ULONG i, j;
   PFN_NUMBER Pfn[7];
   ULONG Count;
 
   DPRINT("MmCopyMmInfo(Src %x, Dest %x)\n", MinWs, Process);
 
   Count = Ke386Pae ? 7 : 2;
 
   for (i = 0; i < Count; i++)
   {
      Status = MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &Pfn[i]);
      if (!NT_SUCCESS(Status))
      {
          for (j = 0; j < i; j++)
          {
              MmReleasePageMemoryConsumer(MC_NPPOOL, Pfn[j]);
          }
 
          return FALSE;
      }
   }
 
   if (Ke386Pae)
   {
      PULONGLONG PageDirTable;
      PULONGLONG PageDir;
 
      PageDirTable = MmCreateHyperspaceMapping(Pfn[0]);
      for (i = 0; i < 4; i++)
      {
         PageDirTable[i] = PAE_PFN_TO_PTE(Pfn[1+i]) | PA_PRESENT;
      }
      MmDeleteHyperspaceMapping(PageDirTable);
      for (i = PAE_ADDR_TO_PDTE_OFFSET(MmSystemRangeStart); i < 4; i++)
      {
         PageDir = (PULONGLONG)MmCreateHyperspaceMapping(Pfn[i+1]);
         memcpy(PageDir, &MmGlobalKernelPageDirectoryForPAE[i * 512], 512 * sizeof(ULONGLONG));
         if (PAE_ADDR_TO_PDTE_OFFSET(PTE_BASE) == i)
         {
            for (j = 0; j < 4; j++)
            {
               PageDir[PAE_ADDR_TO_PDE_PAGE_OFFSET(PTE_BASE) + j] = PAE_PFN_TO_PTE(Pfn[1+j]) | PA_PRESENT | PA_READWRITE;
            }
         }
         if (PAE_ADDR_TO_PDTE_OFFSET(HYPERSPACE) == i)
         {
            PageDir[PAE_ADDR_TO_PDE_PAGE_OFFSET(HYPERSPACE)] = PAE_PFN_TO_PTE(Pfn[5]) | PA_PRESENT | PA_READWRITE;
            PageDir[PAE_ADDR_TO_PDE_PAGE_OFFSET(HYPERSPACE)+1] = PAE_PFN_TO_PTE(Pfn[6]) | PA_PRESENT | PA_READWRITE;
         }
         MmDeleteHyperspaceMapping(PageDir);
      }
   }
   else
   {
      PULONG PageDirectory;
      PageDirectory = MmCreateHyperspaceMapping(Pfn[0]);
 
      memcpy(PageDirectory + ADDR_TO_PDE_OFFSET(MmSystemRangeStart),
             MmGlobalKernelPageDirectory + ADDR_TO_PDE_OFFSET(MmSystemRangeStart),
             (1024 - ADDR_TO_PDE_OFFSET(MmSystemRangeStart)) * sizeof(ULONG));
 
      DPRINT("Addr %x\n",ADDR_TO_PDE_OFFSET(PTE_BASE));
      PageDirectory[ADDR_TO_PDE_OFFSET(PTE_BASE)] = PFN_TO_PTE(Pfn[0]) | PA_PRESENT | PA_READWRITE;
      PageDirectory[ADDR_TO_PDE_OFFSET(HYPERSPACE)] = PFN_TO_PTE(Pfn[1]) | PA_PRESENT | PA_READWRITE;
 
      MmDeleteHyperspaceMapping(PageDirectory);
   }
 
   DirectoryTableBase->QuadPart = PFN_TO_PTE(Pfn[0]);
   DPRINT("Finished MmCopyMmInfo(): %I64x\n", DirectoryTableBase->QuadPart);
   return TRUE;
}

MmCreateVirtualMapping()

NTSTATUS NTAPI MmCreateVirtualMapping	(	PEPROCESS	Process,
		PVOID	Address,
		ULONG	flProtect,
		PPFN_NUMBER	Pages,
		ULONG	PageCount
	)

Definition at line 1226 of file pagepae.c.

{
   ULONG i;
 
   for (i = 0; i < PageCount; i++)
   {
      if (!MmIsPageInUse(Pages[i]))
      {
         DPRINT1("Page at address %x not in use\n", PFN_TO_PTE(Pages[i]));
         ASSERT(FALSE);
      }
   }
 
   return(MmCreateVirtualMappingUnsafe(Process,
                                       Address,
                                       flProtect,
                                       Pages,
                                       PageCount));
}

MmCreateVirtualMappingUnsafe()

NTSTATUS NTAPI MmCreateVirtualMappingUnsafe	(	PEPROCESS	Process,
		PVOID	Address,
		ULONG	flProtect,
		PPFN_NUMBER	Pages,
		ULONG	PageCount
	)

Definition at line 1020 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)PTE_BASE && Pt < (PULONGLONG)PTE_BASE + 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)PTE_BASE && Pt < (PULONG)PTE_BASE + 1024*1024))
            {
               MiFlushTlb(Pt, Address);
            }
         }
      }
      if (Addr > Address)
      {
         MmUnmapPageTable(Pt);
      }
   }
   return(STATUS_SUCCESS);
}

Referenced by MmCreateVirtualMapping().

MmDeletePageFileMapping()

VOID NTAPI MmDeletePageFileMapping	(	PEPROCESS	Process,
		PVOID	Address,
		SWAPENTRY *	SwapEntry
	)

Definition at line 747 of file pagepae.c.

{
   if (Ke386Pae)
   {
      ULONGLONG Pte;
      PULONGLONG Pt;
 
      Pt = MmGetPageTableForProcessForPAE(Process, Address, FALSE);
      if (Pt == NULL)
      {
         *SwapEntry = 0;
         return;
      }
 
      /*
       * Atomically set the entry to zero and get the old value.
       */
      Pte = 0LL;
      Pte = ExfpInterlockedExchange64UL(Pt, &Pte);
 
      MiFlushTlb((PULONG)Pt, Address);
 
      /*
       * Decrement the reference count for this page table.
       */
      if (Process != NULL && Pte &&
          ((PMADDRESS_SPACE)&Process->VadRoot)->PageTableRefCountTable != NULL &&
          Address < MmSystemRangeStart)
      {
         PUSHORT Ptrc;
 
         Ptrc = ((PMADDRESS_SPACE)&Process->VadRoot)->PageTableRefCountTable;
 
         Ptrc[PAE_ADDR_TO_PAGE_TABLE(Address)]--;
         if (Ptrc[PAE_ADDR_TO_PAGE_TABLE(Address)] == 0)
         {
            MmFreePageTable(Process, Address);
         }
      }
 
 
      /*
       * Return some information to the caller
       */
      *SwapEntry = Pte >> 1;
   }
   else
   {
      ULONG Pte;
      PULONG Pt;
 
      Pt = MmGetPageTableForProcess(Process, Address, FALSE);
 
      if (Pt == NULL)
      {
         *SwapEntry = 0;
         return;
      }
 
      /*
       * Atomically set the entry to zero and get the old value.
       */
      Pte = InterlockedExchangeUL(Pt, 0);
 
      MiFlushTlb(Pt, Address);
 
      /*
       * Decrement the reference count for this page table.
       */
      if (Process != NULL && Pte &&
          ((PMADDRESS_SPACE)&Process->VadRoot)->PageTableRefCountTable != NULL &&
          Address < MmSystemRangeStart)
      {
         PUSHORT Ptrc;
 
         Ptrc = ((PMADDRESS_SPACE)&Process->VadRoot)->PageTableRefCountTable;
 
         Ptrc[ADDR_TO_PAGE_TABLE(Address)]--;
         if (Ptrc[ADDR_TO_PAGE_TABLE(Address)] == 0)
         {
            MmFreePageTable(Process, Address);
         }
      }
 
 
      /*
       * Return some information to the caller
       */
      *SwapEntry = Pte >> 1;
   }
}

MmDeleteVirtualMapping()

VOID NTAPI MmDeleteVirtualMapping	(	PEPROCESS	Process,
		PVOID	Address,
		BOOLEAN *	WasDirty,
		PPFN_NUMBER	Page
	)

Definition at line 613 of file pagepae.c.

{
   BOOLEAN WasValid = FALSE;
   PFN_NUMBER Pfn;
 
   DPRINT("MmDeleteVirtualMapping(%x, %x, %d, %x, %x)\n",
          Process, Address, WasDirty, Page);
   if (Ke386Pae)
   {
      ULONGLONG Pte;
      PULONGLONG Pt;
 
      Pt = MmGetPageTableForProcessForPAE(Process, Address, FALSE);
      if (Pt == NULL)
      {
         if (WasDirty != NULL)
         {
            *WasDirty = FALSE;
         }
         if (Page != NULL)
         {
            *Page = 0;
         }
         return;
      }
 
      /*
       * Atomically set the entry to zero and get the old value.
       */
      Pte = 0LL;
      Pte = ExfpInterlockedExchange64UL(Pt, &Pte);
 
      MiFlushTlb((PULONG)Pt, Address);
 
      WasValid = PAE_PAGE_MASK(Pte) != 0 ? TRUE : FALSE;
      if (WasValid)
      {
         Pfn = PAE_PTE_TO_PFN(Pte);
         MmMarkPageUnmapped(Pfn);
      }
      else
      {
         Pfn = 0;
      }
 
      /*
       * Return some information to the caller
       */
      if (WasDirty != NULL)
      {
         *WasDirty = Pte & PA_DIRTY ? TRUE : FALSE;
      }
      if (Page != NULL)
      {
         *Page = Pfn;
      }
   }
   else
   {
      ULONG Pte;
      PULONG Pt;
 
      Pt = MmGetPageTableForProcess(Process, Address, FALSE);
 
      if (Pt == NULL)
      {
         if (WasDirty != NULL)
         {
            *WasDirty = FALSE;
         }
         if (Page != NULL)
         {
            *Page = 0;
         }
         return;
      }
 
      /*
       * Atomically set the entry to zero and get the old value.
       */
      Pte = InterlockedExchangeUL(Pt, 0);
 
      MiFlushTlb(Pt, Address);
 
      WasValid = (PAGE_MASK(Pte) != 0);
      if (WasValid)
      {
         Pfn = PTE_TO_PFN(Pte);
         MmMarkPageUnmapped(Pfn);
      }
      else
      {
         Pfn = 0;
      }
 
      /*
       * Return some information to the caller
       */
      if (WasDirty != NULL)
      {
         *WasDirty = Pte & PA_DIRTY ? TRUE : FALSE;
      }
      if (Page != NULL)
      {
         *Page = Pfn;
      }
   }
   /*
    * Decrement the reference count for this page table.
    */
   if (Process != NULL && WasValid &&
       ((PMADDRESS_SPACE)&Process->VadRoot)->PageTableRefCountTable != NULL &&
       Address < MmSystemRangeStart)
   {
      PUSHORT Ptrc;
      ULONG Idx;
 
      Ptrc = ((PMADDRESS_SPACE)&Process->VadRoot)->PageTableRefCountTable;
      Idx = Ke386Pae ? PAE_ADDR_TO_PAGE_TABLE(Address) : ADDR_TO_PAGE_TABLE(Address);
 
      Ptrc[Idx]--;
      if (Ptrc[Idx] == 0)
      {
         MmFreePageTable(Process, Address);
      }
   }
}

MmFreePageTable()

VOID NTAPI MmFreePageTable	(	PEPROCESS	Process,
		PVOID	Address
	)

Definition at line 258 of file pagepae.c.

{
   PEPROCESS CurrentProcess = PsGetCurrentProcess();
   ULONG i;
   PFN_NUMBER Pfn;
 
   DPRINT("ProcessId %d, Address %x\n", Process->UniqueProcessId, Address);
   if (Process != NULL && Process != CurrentProcess)
   {
      KeAttachProcess(&Process->Pcb);
   }
   if (Ke386Pae)
   {
      PULONGLONG PageTable;
      ULONGLONG ZeroPte = 0LL;
      PageTable = (PULONGLONG)PAGE_ROUND_DOWN((PVOID)PAE_ADDR_TO_PTE(Address));
      for (i = 0; i < 512; i++)
      {
         if (PageTable[i] != 0LL)
         {
            DbgPrint("Page table entry not clear at %x/%x (is %I64x)\n",
                     ((ULONG)Address / (4*1024*1024)), i, PageTable[i]);
            ASSERT(FALSE);
         }
      }
      Pfn = PAE_PTE_TO_PFN(*(PAE_ADDR_TO_PDE(Address)));
      (void)ExfpInterlockedExchange64UL(PAE_ADDR_TO_PDE(Address), &ZeroPte);
      MiFlushTlb((PULONG)PAE_ADDR_TO_PDE(Address), PAE_ADDR_TO_PTE(Address));
   }
   else
   {
      PULONG PageTable;
      PageTable = (PULONG)PAGE_ROUND_DOWN((PVOID)ADDR_TO_PTE(Address));
      for (i = 0; i < 1024; i++)
      {
         if (PageTable[i] != 0)
         {
            DbgPrint("Page table entry not clear at %x/%x (is %x)\n",
                     ((ULONG)Address / (4*1024*1024)), i, PageTable[i]);
            ASSERT(FALSE);
         }
      }
      Pfn = PTE_TO_PFN(*(ADDR_TO_PDE(Address)));
      *(ADDR_TO_PDE(Address)) = 0;
      MiFlushTlb(ADDR_TO_PDE(Address), ADDR_TO_PTE(Address));
   }
 
   if (Address >= MmSystemRangeStart)
   {
      //    MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] = 0;
      ASSERT(FALSE);
   }
   else
   {
      MmReleasePageMemoryConsumer(MC_NPPOOL, Pfn);
   }
   if (Process != NULL && Process != CurrentProcess)
   {
      KeDetachProcess();
   }
}

Referenced by MmDeletePageFileMapping(), and MmDeleteVirtualMapping().

MmGetPageEntryForProcess()

static ULONG MmGetPageEntryForProcess ( PEPROCESS  Process, PVOID  Address  )

static

Definition at line 568 of file pagepae.c.

{
   ULONG Pte;
   PULONG Pt;
 
   Pt = MmGetPageTableForProcess(Process, Address, FALSE);
   if (Pt)
   {
      Pte = *Pt;
      MmUnmapPageTable(Pt);
      return Pte;
   }
   return 0;
}

Referenced by MmGetPageProtect(), MmGetPfnForProcess(), MmIsDirtyPage(), MmIsPagePresent(), and MmIsPageSwapEntry().

MmGetPageEntryForProcessForPAE()

static ULONGLONG MmGetPageEntryForProcessForPAE ( PEPROCESS  Process, PVOID  Address  )

static

Definition at line 553 of file pagepae.c.

{
   ULONGLONG Pte;
   PULONGLONG Pt;
 
   Pt = MmGetPageTableForProcessForPAE(Process, Address, FALSE);
   if (Pt)
   {
      Pte = *Pt;
      MmUnmapPageTable((PULONG)Pt);
      return Pte;
   }
   return 0;
}

Referenced by MmGetPageProtect(), MmGetPfnForProcess(), MmIsDirtyPage(), MmIsPagePresent(), and MmIsPageSwapEntry().

MmGetPageProtect()

ULONG NTAPI MmGetPageProtect	(	PEPROCESS	Process,
		PVOID	Address
	)

Definition at line 1252 of file pagepae.c.

{
   ULONG Entry;
   ULONG Protect;
   if (Ke386Pae)
   {
      Entry = MmGetPageEntryForProcessForPAE(Process, Address);
   }
   else
   {
      Entry = MmGetPageEntryForProcess(Process, Address);
   }
 
   if (!(Entry & PA_PRESENT))
   {
      Protect = PAGE_NOACCESS;
   }
   else
   {
      if (Entry & PA_READWRITE)
      {
         Protect = PAGE_READWRITE;
      }
      else
      {
         Protect = PAGE_EXECUTE_READ;
      }
      if (Entry & PA_CD)
      {
         Protect |= PAGE_NOCACHE;
      }
      if (Entry & PA_WT)
      {
         Protect |= PAGE_WRITETHROUGH;
      }
      if (!(Entry & PA_USER))
      {
         Protect |= PAGE_SYSTEM;
      }
 
   }
   return(Protect);
}

MmGetPageTableForProcess()

static PULONG MmGetPageTableForProcess ( PEPROCESS  Process, PVOID  Address, BOOLEAN  Create  )

static

Definition at line 435 of file pagepae.c.

{
   ULONG PdeOffset = ADDR_TO_PDE_OFFSET(Address);
   NTSTATUS Status;
   PFN_NUMBER Pfn;
   ULONG Entry;
   PULONG Pt, PageDir;
 
   if (Address < MmSystemRangeStart && Process && Process != PsGetCurrentProcess())
   {
      PageDir = MmCreateHyperspaceMapping(PTE_TO_PFN(Process->Pcb.DirectoryTableBase.LowPart));
      if (PageDir == NULL)
      {
         ASSERT(FALSE);
      }
      if (0 == InterlockedCompareExchangeUL(&PageDir[PdeOffset], 0, 0))
      {
         if (Create == FALSE)
         {
            MmDeleteHyperspaceMapping(PageDir);
            return NULL;
         }
         Status = MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &Pfn);
         if (!NT_SUCCESS(Status) || Pfn == 0)
         {
            ASSERT(FALSE);
         }
         Entry = InterlockedCompareExchangeUL(&PageDir[PdeOffset], PFN_TO_PTE(Pfn) | PA_PRESENT | PA_READWRITE | PA_USER, 0);
         if (Entry != 0)
         {
            MmReleasePageMemoryConsumer(MC_NPPOOL, Pfn);
            Pfn = PTE_TO_PFN(Entry);
         }
      }
      else
      {
         Pfn = PTE_TO_PFN(PageDir[PdeOffset]);
      }
      MmDeleteHyperspaceMapping(PageDir);
      Pt = MmCreateHyperspaceMapping(Pfn);
      if (Pt == NULL)
      {
         ASSERT(FALSE);
      }
      return Pt + ADDR_TO_PTE_OFFSET(Address);
   }
   PageDir = ADDR_TO_PDE(Address);
   if (0 == InterlockedCompareExchangeUL(PageDir, 0, 0))
   {
      if (Address >= MmSystemRangeStart)
      {
         if (0 == InterlockedCompareExchangeUL(&MmGlobalKernelPageDirectory[PdeOffset], 0, 0))
         {
            if (Create == FALSE)
            {
               return NULL;
            }
            Status = MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &Pfn);
            if (!NT_SUCCESS(Status) || Pfn == 0)
            {
               ASSERT(FALSE);
            }
            Entry = PFN_TO_PTE(Pfn) | PA_PRESENT | PA_READWRITE;
            if (Ke386GlobalPagesEnabled)
            {
               Entry |= PA_GLOBAL;
            }
            if(0 != InterlockedCompareExchangeUL(&MmGlobalKernelPageDirectory[PdeOffset], Entry, 0))
            {
               MmReleasePageMemoryConsumer(MC_NPPOOL, Pfn);
            }
         }
         (void)InterlockedExchangeUL(PageDir, MmGlobalKernelPageDirectory[PdeOffset]);
      }
      else
      {
         if (Create == FALSE)
         {
            return NULL;
         }
         Status = MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &Pfn);
         if (!NT_SUCCESS(Status) || Pfn == 0)
         {
            ASSERT(FALSE);
         }
         Entry = InterlockedCompareExchangeUL(PageDir, PFN_TO_PTE(Pfn) | PA_PRESENT | PA_READWRITE | PA_USER, 0);
         if (Entry != 0)
         {
            MmReleasePageMemoryConsumer(MC_NPPOOL, Pfn);
         }
      }
   }
   return (PULONG)ADDR_TO_PTE(Address);
}

Referenced by MmCreatePageFileMapping(), MmCreateVirtualMappingUnsafe(), MmDeletePageFileMapping(), MmDeleteVirtualMapping(), MmGetPageEntryForProcess(), Mmi386MakeKernelPageTableGlobal(), and MmSetPageProtect().

MmGetPageTableForProcessForPAE()

static PULONGLONG MmGetPageTableForProcessForPAE ( PEPROCESS  Process, PVOID  Address, BOOLEAN  Create  )

static

Definition at line 321 of file pagepae.c.

{
   NTSTATUS Status;
   PFN_NUMBER Pfn;
   ULONGLONG Entry;
   ULONGLONG ZeroEntry = 0LL;
   PULONGLONG Pt;
   PULONGLONG PageDir;
   PULONGLONG PageDirTable;
 
   DPRINT("MmGetPageTableForProcessForPAE(%x %x %d)\n",
          Process, Address, Create);
   if (Address >= (PVOID)PTE_BASE && Address < (PVOID)((ULONG_PTR)PTE_BASE + 0x800000))
   {
      ASSERT(FALSE);
   }
   if (Address < MmSystemRangeStart && Process && Process != PsGetCurrentProcess())
   {
      PageDirTable = MmCreateHyperspaceMapping(PAE_PTE_TO_PFN(Process->Pcb.DirectoryTableBase.QuadPart));
      if (PageDirTable == NULL)
      {
         ASSERT(FALSE);
      }
      PageDir = MmCreateHyperspaceMapping(PAE_PTE_TO_PFN(PageDirTable[PAE_ADDR_TO_PDTE_OFFSET(Address)]));
      MmDeleteHyperspaceMapping(PageDirTable);
      if (PageDir == NULL)
      {
         ASSERT(FALSE);
      }
      PageDir += PAE_ADDR_TO_PDE_PAGE_OFFSET(Address);
      Entry = ExfInterlockedCompareExchange64UL(PageDir, &ZeroEntry, &ZeroEntry);
      if (Entry == 0LL)
      {
         if (Create == FALSE)
         {
            MmDeleteHyperspaceMapping(PageDir);
            return NULL;
         }
         Status = MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &Pfn);
         if (!NT_SUCCESS(Status))
         {
            ASSERT(FALSE);
         }
         Entry = PFN_TO_PTE(Pfn) | PA_PRESENT | PA_READWRITE | PA_USER;
         Entry = ExfInterlockedCompareExchange64UL(PageDir, &Entry, &ZeroEntry);
         if (Entry != 0LL)
         {
            MmReleasePageMemoryConsumer(MC_NPPOOL, Pfn);
            Pfn = PAE_PTE_TO_PFN(Entry);
         }
      }
      else
      {
         Pfn = PAE_PTE_TO_PFN(Entry);
      }
      MmDeleteHyperspaceMapping(PageDir);
      Pt = MmCreateHyperspaceMapping(Pfn);
      if (Pt == NULL)
      {
         ASSERT(FALSE);
      }
      return Pt + PAE_ADDR_TO_PTE_OFFSET(Address);
   }
   PageDir = PAE_ADDR_TO_PDE(Address);
   if (0LL == ExfInterlockedCompareExchange64UL(PageDir, &ZeroEntry, &ZeroEntry))
   {
      if (Address >= MmSystemRangeStart)
      {
         if (MmGlobalKernelPageDirectoryForPAE[PAE_ADDR_TO_PDE_OFFSET(Address)] == 0LL)
         {
            if (Create == FALSE)
            {
               return NULL;
            }
            Status = MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &Pfn);
            if (!NT_SUCCESS(Status))
            {
               ASSERT(FALSE);
            }
            Entry = PAE_PFN_TO_PTE(Pfn) | PA_PRESENT | PA_READWRITE;
            if (Ke386GlobalPagesEnabled)
            {
               Entry |= PA_GLOBAL;
            }
            if (0LL != ExfInterlockedCompareExchange64UL(&MmGlobalKernelPageDirectoryForPAE[PAE_ADDR_TO_PDE_OFFSET(Address)], &Entry, &ZeroEntry))
            {
               MmReleasePageMemoryConsumer(MC_NPPOOL, Pfn);
            }
         }
         (void)ExfInterlockedCompareExchange64UL(PageDir, &MmGlobalKernelPageDirectoryForPAE[PAE_ADDR_TO_PDE_OFFSET(Address)], &ZeroEntry);
      }
      else
      {
         if (Create == FALSE)
         {
            return NULL;
         }
         Status = MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &Pfn);
         if (!NT_SUCCESS(Status))
         {
            ASSERT(FALSE);
         }
         Entry = PFN_TO_PTE(Pfn) | PA_PRESENT | PA_READWRITE | PA_USER;
         Entry = ExfInterlockedCompareExchange64UL(PageDir, &Entry, &ZeroEntry);
         if (Entry != 0LL)
         {
            MmReleasePageMemoryConsumer(MC_NPPOOL, Pfn);
         }
      }
   }
   return (PULONGLONG)PAE_ADDR_TO_PTE(Address);
}

Referenced by MmCreatePageFileMapping(), MmCreateVirtualMappingUnsafe(), MmDeletePageFileMapping(), MmDeleteVirtualMapping(), MmGetPageEntryForProcessForPAE(), Mmi386MakeKernelPageTableGlobal(), and MmSetPageProtect().

MmGetPfnForProcess()

PFN_NUMBER NTAPI MmGetPfnForProcess	(	PEPROCESS	Process,
		PVOID	Address
	)

Definition at line 585 of file pagepae.c.

{
 
   if (Ke386Pae)
   {
      ULONGLONG Entry;
      Entry = MmGetPageEntryForProcessForPAE(Process, Address);
      if (!(Entry & PA_PRESENT))
      {
         return 0;
      }
      return(PAE_PTE_TO_PFN(Entry));
   }
   else
   {
      ULONG Entry;
      Entry = MmGetPageEntryForProcess(Process, Address);
      if (!(Entry & PA_PRESENT))
      {
         return 0;
      }
      return(PTE_TO_PFN(Entry));
   }
}

Mmi386MakeKernelPageTableGlobal()

BOOLEAN Mmi386MakeKernelPageTableGlobal

(

PVOID

PAddress

)

Definition at line 844 of file pagepae.c.

{
   if (Ke386Pae)
   {
      PULONGLONG Pt;
      PULONGLONG Pde;
      Pde = PAE_ADDR_TO_PDE(PAddress);
      if (*Pde == 0LL)
      {
         Pt = MmGetPageTableForProcessForPAE(NULL, PAddress, FALSE);
#if 0
         /* Non existing mappings are not cached within the tlb. We must not invalidate this entry */
         FLASH_TLB_ONE(PAddress);
#endif
         if (Pt != NULL)
         {
            return TRUE;
         }
      }
   }
   else
   {
      PULONG Pt, Pde;
      Pde = ADDR_TO_PDE(PAddress);
      if (*Pde == 0)
      {
         Pt = MmGetPageTableForProcess(NULL, PAddress, FALSE);
#if 0
         /* Non existing mappings are not cached within the tlb. We must not invalidate this entry */
         FLASH_TLB_ONE(PAddress);
#endif
         if (Pt != NULL)
         {
            return TRUE;
         }
      }
   }
   return(FALSE);
}

Referenced by MmAccessFault().

MmInitGlobalKernelPageDirectory()

VOID NTAPI MmInitGlobalKernelPageDirectory

(

VOID

)

Definition at line 1368 of file pagepae.c.

{
   ULONG i;
 
   DPRINT("MmInitGlobalKernelPageDirectory()\n");
 
   if (Ke386Pae)
   {
      PULONGLONG CurrentPageDirectory = (PULONGLONG)PAE_PAGEDIRECTORY_MAP;
      for (i = PAE_ADDR_TO_PDE_OFFSET(MmSystemRangeStart); i < 4 * 512; i++)
      {
         if (!(i >= PAE_ADDR_TO_PDE_OFFSET(PTE_BASE) && i < PAE_ADDR_TO_PDE_OFFSET(PTE_BASE) + 4) &&
             !(i >= PAE_ADDR_TO_PDE_OFFSET(HYPERSPACE) && i < PAE_ADDR_TO_PDE_OFFSET(HYPERSPACE) + 2) &&
             0LL == MmGlobalKernelPageDirectoryForPAE[i] && 0LL != CurrentPageDirectory[i])
         {
            (void)ExfpInterlockedExchange64UL(&MmGlobalKernelPageDirectoryForPAE[i], &CurrentPageDirectory[i]);
            if (Ke386GlobalPagesEnabled)
            {
               MmGlobalKernelPageDirectoryForPAE[i] |= PA_GLOBAL;
               CurrentPageDirectory[i] |= PA_GLOBAL;
            }
         }
      }
   }
   else
   {
      PULONG CurrentPageDirectory = (PULONG)PAGEDIRECTORY_MAP;
      for (i = ADDR_TO_PDE_OFFSET(MmSystemRangeStart); i < 1024; i++)
      {
         if (i != ADDR_TO_PDE_OFFSET(PTE_BASE) &&
             i != ADDR_TO_PDE_OFFSET(HYPERSPACE) &&
             0 == MmGlobalKernelPageDirectory[i] && 0 != CurrentPageDirectory[i])
         {
            MmGlobalKernelPageDirectory[i] = CurrentPageDirectory[i];
            if (Ke386GlobalPagesEnabled)
            {
               MmGlobalKernelPageDirectory[i] |= PA_GLOBAL;
               CurrentPageDirectory[i] |= PA_GLOBAL;
            }
         }
      }
   }
}

Referenced by MmInitSystem().

MmIsDirtyPage()

BOOLEAN NTAPI MmIsDirtyPage	(	PEPROCESS	Process,
		PVOID	Address
	)

Definition at line 886 of file pagepae.c.

{
   if (Ke386Pae)
   {
      return MmGetPageEntryForProcessForPAE(Process, Address) & PA_DIRTY ? TRUE : FALSE;
   }
   else
   {
      return MmGetPageEntryForProcess(Process, Address) & PA_DIRTY ? TRUE : FALSE;
   }
}

MmIsPagePresent()

BOOLEAN NTAPI MmIsPagePresent	(	PEPROCESS	Process,
		PVOID	Address
	)

Definition at line 900 of file pagepae.c.

{
   if (Ke386Pae)
   {
      return MmGetPageEntryForProcessForPAE(Process, Address) & PA_PRESENT ? TRUE : FALSE;
   }
   else
   {
      return MmGetPageEntryForProcess(Process, Address) & PA_PRESENT ? TRUE : FALSE;
   }
}

MmIsPageSwapEntry()

BOOLEAN NTAPI MmIsPageSwapEntry	(	PEPROCESS	Process,
		PVOID	Address
	)

Definition at line 914 of file pagepae.c.

{
   if (Ke386Pae)
   {
      ULONGLONG Entry;
      Entry = MmGetPageEntryForProcessForPAE(Process, Address);
      return !(Entry & PA_PRESENT) && Entry != 0 ? TRUE : FALSE;
   }
   else
   {
      ULONG Entry;
      Entry = MmGetPageEntryForProcess(Process, Address);
      return !(Entry & PA_PRESENT) && Entry != 0 ? TRUE : FALSE;
   }
}

MmSetPageProtect()

VOID NTAPI MmSetPageProtect	(	PEPROCESS	Process,
		PVOID	Address,
		ULONG	flProtect
	)

Definition at line 1298 of file pagepae.c.

{
   ULONG Attributes = 0;
   BOOLEAN NoExecute = FALSE;
 
   DPRINT("MmSetPageProtect(Process %x  Address %x  flProtect %x)\n",
          Process, Address, flProtect);
 
   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;
   }
   if (Ke386Pae)
   {
      PULONGLONG Pt;
      ULONGLONG tmpPte, Pte;
 
      Pt = MmGetPageTableForProcessForPAE(Process, Address, FALSE);
      if (Pt == NULL)
      {
         DPRINT1("Address %x\n", Address);
         ASSERT(FALSE);
      }
      do
      {
        Pte = *Pt;
        tmpPte = PAE_PAGE_MASK(Pte) | Attributes | (Pte & (PA_ACCESSED|PA_DIRTY));
        if (NoExecute)
        {
           tmpPte |= 0x8000000000000000LL;
        }
        else
        {
           tmpPte &= ~0x8000000000000000LL;
        }
      } while (Pte != ExfInterlockedCompareExchange64UL(Pt, &tmpPte, &Pte));
 
      MiFlushTlb((PULONG)Pt, Address);
   }
   else
   {
      PULONG Pt;
 
      Pt = MmGetPageTableForProcess(Process, Address, FALSE);
      if (Pt == NULL)
      {
         ASSERT(FALSE);
      }
      InterlockedExchange((PLONG)Pt, PAGE_MASK(*Pt) | Attributes | (*Pt & (PA_ACCESSED|PA_DIRTY)));
      MiFlushTlb(Pt, Address);
   }
}

MmUnmapPageTable()

BOOLEAN MmUnmapPageTable

(

PULONG

Pt

)

Definition at line 530 of file pagepae.c.

{
   if (Ke386Pae)
   {
      if ((PULONGLONG)Pt >= (PULONGLONG)PTE_BASE && (PULONGLONG)Pt < (PULONGLONG)PTE_BASE + 4*512*512)
      {
         return TRUE;
      }
   }
   else
   {
      if (Pt >= (PULONG)PTE_BASE && Pt < (PULONG)PTE_BASE + 1024*1024)
      {
         return TRUE;
      }
   }
   if (Pt)
   {
      MmDeleteHyperspaceMapping((PVOID)PAGE_ROUND_DOWN(Pt));
   }
   return FALSE;
}

Referenced by MiFlushTlb(), MmCreatePageFileMapping(), MmCreateVirtualMappingUnsafe(), MmGetPageEntryForProcess(), and MmGetPageEntryForProcessForPAE().

ProtectToPTE()

static ULONG ProtectToPTE ( ULONG  flProtect )

static

Definition at line 105 of file pagepae.c.

{
   ULONG Attributes = 0;
 
   if (flProtect & (PAGE_NOACCESS|PAGE_GUARD))
   {
      Attributes = 0;
   }
   else if (flProtect & PAGE_IS_WRITABLE)
   {
      Attributes = PA_PRESENT | PA_READWRITE;
   }
   else if (flProtect & (PAGE_IS_READABLE | PAGE_IS_EXECUTABLE))
   {
      Attributes = PA_PRESENT;
   }
   else
   {
      DPRINT1("Unknown main protection type.\n");
      ASSERT(FALSE);
   }
   if (Ke386NoExecute &&
       !(flProtect & PAGE_IS_EXECUTABLE))
   {
      Attributes = Attributes | 0x80000000;
   }
 
   if (flProtect & PAGE_SYSTEM)
   {
   }
   else
   {
      Attributes = Attributes | PA_USER;
   }
   if (flProtect & PAGE_NOCACHE)
   {
      Attributes = Attributes | PA_CD;
   }
   if (flProtect & PAGE_WRITETHROUGH)
   {
      Attributes = Attributes | PA_WT;
   }
   return(Attributes);
}

Referenced by MmCreateVirtualMappingUnsafe(), and MmSetPageProtect().

Variable Documentation

Ke386NoExecute

BOOLEAN Ke386NoExecute

extern

Definition at line 36 of file cpu.c.

Referenced by ProtectToPTE().

Ke386Pae

BOOLEAN Ke386Pae

extern

Definition at line 35 of file cpu.c.

Referenced by MmCreatePageFileMapping(), MmCreateProcessAddressSpace(), MmCreateVirtualMappingUnsafe(), MmDeletePageFileMapping(), MmDeleteVirtualMapping(), MmFreePageTable(), MmGetPageProtect(), MmGetPfnForProcess(), Mmi386MakeKernelPageTableGlobal(), MmInitGlobalKernelPageDirectory(), MmIsDirtyPage(), MmIsPagePresent(), MmIsPageSwapEntry(), MmSetPageProtect(), and MmUnmapPageTable().

MmGlobalKernelPageDirectory

ULONG MmGlobalKernelPageDirectory[1024]

static

Definition at line 42 of file pagepae.c.

Referenced by MmCreateProcessAddressSpace(), MmGetPageTableForProcess(), and MmInitGlobalKernelPageDirectory().

MmGlobalKernelPageDirectoryForPAE

ULONGLONG MmGlobalKernelPageDirectoryForPAE[2048]

static

Definition at line 43 of file pagepae.c.

Referenced by MmCreateProcessAddressSpace(), MmGetPageTableForProcessForPAE(), and MmInitGlobalKernelPageDirectory().