mirror of
https://github.com/reactos/reactos.git
synced 2024-08-28 14:18:41 +00:00
1543 lines
38 KiB
C
1543 lines
38 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: ntoskrnl/mm/i386/pagepae.c
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* PURPOSE: Low level memory managment manipulation
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*
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* PROGRAMMERS: David Welch (welch@cwcom.net)
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*/
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/* INCLUDES ***************************************************************/
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#include <ntoskrnl.h>
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#define NDEBUG
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#include <debug.h>
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#if defined (ALLOC_PRAGMA)
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#pragma alloc_text(INIT, MmInitGlobalKernelPageDirectory)
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#endif
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/* GLOBALS *****************************************************************/
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#define PA_BIT_PRESENT (0)
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#define PA_BIT_READWRITE (1)
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#define PA_BIT_USER (2)
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#define PA_BIT_WT (3)
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#define PA_BIT_CD (4)
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#define PA_BIT_ACCESSED (5)
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#define PA_BIT_DIRTY (6)
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#define PA_BIT_GLOBAL (8)
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#define PA_PRESENT (1 << PA_BIT_PRESENT)
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#define PA_READWRITE (1 << PA_BIT_READWRITE)
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#define PA_USER (1 << PA_BIT_USER)
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#define PA_DIRTY (1 << PA_BIT_DIRTY)
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#define PA_WT (1 << PA_BIT_WT)
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#define PA_CD (1 << PA_BIT_CD)
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#define PA_ACCESSED (1 << PA_BIT_ACCESSED)
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#define PA_GLOBAL (1 << PA_BIT_GLOBAL)
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#define PAGEDIRECTORY_MAP (0xc0000000 + (PTE_BASE / (1024)))
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#define PAE_PAGEDIRECTORY_MAP (0xc0000000 + (PTE_BASE / (512)))
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#define HYPERSPACE (Ke386Pae ? 0xc0800000 : 0xc0400000)
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#define IS_HYPERSPACE(v) (((ULONG)(v) >= HYPERSPACE && (ULONG)(v) < HYPERSPACE + 0x400000))
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static ULONG MmGlobalKernelPageDirectory[1024];
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static ULONGLONG MmGlobalKernelPageDirectoryForPAE[2048];
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#define PTE_TO_PFN(X) ((X) >> PAGE_SHIFT)
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#define PFN_TO_PTE(X) ((X) << PAGE_SHIFT)
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#define PAE_PTE_TO_PFN(X) (PAE_PAGE_MASK(X) >> PAGE_SHIFT)
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#define PAE_PFN_TO_PTE(X) ((X) << PAGE_SHIFT)
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#define PAGE_MASK(x) ((x)&(~0xfff))
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#define PAE_PAGE_MASK(x) ((x)&(~0xfffLL))
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extern BOOLEAN Ke386Pae;
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extern BOOLEAN Ke386NoExecute;
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/* FUNCTIONS ***************************************************************/
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BOOLEAN MmUnmapPageTable(PULONG Pt);
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ULONG_PTR
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NTAPI
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MiFlushTlbIpiRoutine(ULONG_PTR Address)
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{
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if (Address == (ULONGLONG)-1)
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{
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KeFlushCurrentTb();
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}
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else if (Address == (ULONGLONG)-2)
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{
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KeFlushCurrentTb();
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}
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else
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{
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__invlpg((PVOID)Address);
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}
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return 0;
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}
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VOID
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MiFlushTlb(PULONG Pt, PVOID Address)
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{
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#ifdef CONFIG_SMP
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if (Pt)
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{
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MmUnmapPageTable(Pt);
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}
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if (KeNumberProcessors > 1)
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{
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KeIpiGenericCall(MiFlushTlbIpiRoutine, (ULONG_PTR)Address);
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}
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else
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{
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MiFlushTlbIpiRoutine((ULONG_PTR)Address);
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}
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#else
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if ((Pt && MmUnmapPageTable(Pt)) || Address >= MmSystemRangeStart)
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{
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__invlpg(Address);
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}
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#endif
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}
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static ULONG
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ProtectToPTE(ULONG flProtect)
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{
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ULONG Attributes = 0;
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if (flProtect & (PAGE_NOACCESS|PAGE_GUARD))
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{
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Attributes = 0;
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}
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else if (flProtect & PAGE_IS_WRITABLE)
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{
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Attributes = PA_PRESENT | PA_READWRITE;
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}
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else if (flProtect & (PAGE_IS_READABLE | PAGE_IS_EXECUTABLE))
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{
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Attributes = PA_PRESENT;
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}
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else
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{
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DPRINT1("Unknown main protection type.\n");
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ASSERT(FALSE);
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}
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if (Ke386NoExecute &&
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!(flProtect & PAGE_IS_EXECUTABLE))
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{
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Attributes = Attributes | 0x80000000;
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}
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if (flProtect & PAGE_SYSTEM)
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{
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}
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else
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{
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Attributes = Attributes | PA_USER;
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}
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if (flProtect & PAGE_NOCACHE)
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{
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Attributes = Attributes | PA_CD;
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}
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if (flProtect & PAGE_WRITETHROUGH)
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{
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Attributes = Attributes | PA_WT;
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}
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return(Attributes);
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}
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#define ADDR_TO_PAGE_TABLE(v) (((ULONG)(v)) / (1024 * PAGE_SIZE))
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#define ADDR_TO_PDE(v) (PULONG)(PAGEDIRECTORY_MAP + \
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((((ULONG)(v)) / (1024 * 1024))&(~0x3)))
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#define ADDR_TO_PTE(v) (PULONG)(PTE_BASE + ((((ULONG)(v) / 1024))&(~0x3)))
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#define ADDR_TO_PDE_OFFSET(v) ((((ULONG)(v)) / (1024 * PAGE_SIZE)))
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#define ADDR_TO_PTE_OFFSET(v) ((((ULONG)(v)) % (1024 * PAGE_SIZE)) / PAGE_SIZE)
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#define PAE_ADDR_TO_PAGE_TABLE(v) (((ULONG)(v)) / (512 * PAGE_SIZE))
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#define PAE_ADDR_TO_PDE(v) (PULONGLONG) (PAE_PAGEDIRECTORY_MAP + \
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((((ULONG_PTR)(v)) / (512 * 512))&(~0x7)))
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#define PAE_ADDR_TO_PTE(v) (PULONGLONG) (PTE_BASE + ((((ULONG_PTR)(v) / 512))&(~0x7)))
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#define PAE_ADDR_TO_PDTE_OFFSET(v) (((ULONG_PTR)(v)) / (512 * 512 * PAGE_SIZE))
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#define PAE_ADDR_TO_PDE_PAGE_OFFSET(v) ((((ULONG_PTR)(v)) % (512 * 512 * PAGE_SIZE)) / (512 * PAGE_SIZE))
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#define PAE_ADDR_TO_PDE_OFFSET(v) (((ULONG_PTR)(v))/ (512 * PAGE_SIZE))
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#define PAE_ADDR_TO_PTE_OFFSET(v) ((((ULONG_PTR)(v)) % (512 * PAGE_SIZE)) / PAGE_SIZE)
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BOOLEAN
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NTAPI
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MmCreateProcessAddressSpace(IN ULONG MinWs,
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IN PEPROCESS Process,
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IN PLARGE_INTEGER DirectoryTableBase)
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{
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NTSTATUS Status;
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ULONG i, j;
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PFN_NUMBER Pfn[7];
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ULONG Count;
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DPRINT("MmCopyMmInfo(Src %x, Dest %x)\n", MinWs, Process);
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Count = Ke386Pae ? 7 : 2;
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for (i = 0; i < Count; i++)
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{
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Status = MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &Pfn[i]);
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if (!NT_SUCCESS(Status))
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{
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for (j = 0; j < i; j++)
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{
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MmReleasePageMemoryConsumer(MC_NPPOOL, Pfn[j]);
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}
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return FALSE;
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}
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}
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if (Ke386Pae)
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{
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PULONGLONG PageDirTable;
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PULONGLONG PageDir;
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PageDirTable = MmCreateHyperspaceMapping(Pfn[0]);
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for (i = 0; i < 4; i++)
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{
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PageDirTable[i] = PAE_PFN_TO_PTE(Pfn[1+i]) | PA_PRESENT;
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}
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MmDeleteHyperspaceMapping(PageDirTable);
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for (i = PAE_ADDR_TO_PDTE_OFFSET(MmSystemRangeStart); i < 4; i++)
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{
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PageDir = (PULONGLONG)MmCreateHyperspaceMapping(Pfn[i+1]);
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memcpy(PageDir, &MmGlobalKernelPageDirectoryForPAE[i * 512], 512 * sizeof(ULONGLONG));
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if (PAE_ADDR_TO_PDTE_OFFSET(PTE_BASE) == i)
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{
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for (j = 0; j < 4; j++)
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{
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PageDir[PAE_ADDR_TO_PDE_PAGE_OFFSET(PTE_BASE) + j] = PAE_PFN_TO_PTE(Pfn[1+j]) | PA_PRESENT | PA_READWRITE;
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}
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}
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if (PAE_ADDR_TO_PDTE_OFFSET(HYPERSPACE) == i)
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{
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PageDir[PAE_ADDR_TO_PDE_PAGE_OFFSET(HYPERSPACE)] = PAE_PFN_TO_PTE(Pfn[5]) | PA_PRESENT | PA_READWRITE;
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PageDir[PAE_ADDR_TO_PDE_PAGE_OFFSET(HYPERSPACE)+1] = PAE_PFN_TO_PTE(Pfn[6]) | PA_PRESENT | PA_READWRITE;
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}
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MmDeleteHyperspaceMapping(PageDir);
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}
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}
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else
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{
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PULONG PageDirectory;
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PageDirectory = MmCreateHyperspaceMapping(Pfn[0]);
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memcpy(PageDirectory + ADDR_TO_PDE_OFFSET(MmSystemRangeStart),
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MmGlobalKernelPageDirectory + ADDR_TO_PDE_OFFSET(MmSystemRangeStart),
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(1024 - ADDR_TO_PDE_OFFSET(MmSystemRangeStart)) * sizeof(ULONG));
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DPRINT("Addr %x\n",ADDR_TO_PDE_OFFSET(PTE_BASE));
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PageDirectory[ADDR_TO_PDE_OFFSET(PTE_BASE)] = PFN_TO_PTE(Pfn[0]) | PA_PRESENT | PA_READWRITE;
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PageDirectory[ADDR_TO_PDE_OFFSET(HYPERSPACE)] = PFN_TO_PTE(Pfn[1]) | PA_PRESENT | PA_READWRITE;
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MmDeleteHyperspaceMapping(PageDirectory);
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}
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DirectoryTableBase->QuadPart = PFN_TO_PTE(Pfn[0]);
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DPRINT("Finished MmCopyMmInfo(): %I64x\n", DirectoryTableBase->QuadPart);
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return TRUE;
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}
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VOID
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NTAPI
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MmFreePageTable(PEPROCESS Process, PVOID Address)
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{
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PEPROCESS CurrentProcess = PsGetCurrentProcess();
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ULONG i;
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PFN_NUMBER Pfn;
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DPRINT("ProcessId %d, Address %x\n", Process->UniqueProcessId, Address);
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if (Process != NULL && Process != CurrentProcess)
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{
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KeAttachProcess(&Process->Pcb);
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}
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if (Ke386Pae)
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{
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PULONGLONG PageTable;
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ULONGLONG ZeroPte = 0LL;
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PageTable = (PULONGLONG)PAGE_ROUND_DOWN((PVOID)PAE_ADDR_TO_PTE(Address));
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for (i = 0; i < 512; i++)
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{
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if (PageTable[i] != 0LL)
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{
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DbgPrint("Page table entry not clear at %x/%x (is %I64x)\n",
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((ULONG)Address / (4*1024*1024)), i, PageTable[i]);
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ASSERT(FALSE);
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}
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}
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Pfn = PAE_PTE_TO_PFN(*(PAE_ADDR_TO_PDE(Address)));
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(void)ExfpInterlockedExchange64UL(PAE_ADDR_TO_PDE(Address), &ZeroPte);
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MiFlushTlb((PULONG)PAE_ADDR_TO_PDE(Address), PAE_ADDR_TO_PTE(Address));
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}
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else
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{
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PULONG PageTable;
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PageTable = (PULONG)PAGE_ROUND_DOWN((PVOID)ADDR_TO_PTE(Address));
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for (i = 0; i < 1024; i++)
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{
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if (PageTable[i] != 0)
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{
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DbgPrint("Page table entry not clear at %x/%x (is %x)\n",
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((ULONG)Address / (4*1024*1024)), i, PageTable[i]);
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ASSERT(FALSE);
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}
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}
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Pfn = PTE_TO_PFN(*(ADDR_TO_PDE(Address)));
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*(ADDR_TO_PDE(Address)) = 0;
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MiFlushTlb(ADDR_TO_PDE(Address), ADDR_TO_PTE(Address));
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}
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if (Address >= MmSystemRangeStart)
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{
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// MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] = 0;
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ASSERT(FALSE);
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}
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else
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{
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MmReleasePageMemoryConsumer(MC_NPPOOL, Pfn);
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}
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if (Process != NULL && Process != CurrentProcess)
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{
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KeDetachProcess();
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}
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}
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static PULONGLONG
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MmGetPageTableForProcessForPAE(PEPROCESS Process, PVOID Address, BOOLEAN Create)
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{
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NTSTATUS Status;
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PFN_NUMBER Pfn;
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ULONGLONG Entry;
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ULONGLONG ZeroEntry = 0LL;
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PULONGLONG Pt;
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PULONGLONG PageDir;
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PULONGLONG PageDirTable;
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DPRINT("MmGetPageTableForProcessForPAE(%x %x %d)\n",
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Process, Address, Create);
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if (Address >= (PVOID)PTE_BASE && Address < (PVOID)((ULONG_PTR)PTE_BASE + 0x800000))
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{
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ASSERT(FALSE);
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}
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if (Address < MmSystemRangeStart && Process && Process != PsGetCurrentProcess())
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{
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PageDirTable = MmCreateHyperspaceMapping(PAE_PTE_TO_PFN(Process->Pcb.DirectoryTableBase.QuadPart));
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if (PageDirTable == NULL)
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{
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ASSERT(FALSE);
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}
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PageDir = MmCreateHyperspaceMapping(PAE_PTE_TO_PFN(PageDirTable[PAE_ADDR_TO_PDTE_OFFSET(Address)]));
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MmDeleteHyperspaceMapping(PageDirTable);
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if (PageDir == NULL)
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{
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ASSERT(FALSE);
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}
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PageDir += PAE_ADDR_TO_PDE_PAGE_OFFSET(Address);
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Entry = ExfInterlockedCompareExchange64UL(PageDir, &ZeroEntry, &ZeroEntry);
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if (Entry == 0LL)
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{
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if (Create == FALSE)
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{
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MmDeleteHyperspaceMapping(PageDir);
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return NULL;
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}
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Status = MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &Pfn);
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if (!NT_SUCCESS(Status))
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{
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ASSERT(FALSE);
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}
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Entry = PFN_TO_PTE(Pfn) | PA_PRESENT | PA_READWRITE | PA_USER;
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Entry = ExfInterlockedCompareExchange64UL(PageDir, &Entry, &ZeroEntry);
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if (Entry != 0LL)
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{
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MmReleasePageMemoryConsumer(MC_NPPOOL, Pfn);
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Pfn = PAE_PTE_TO_PFN(Entry);
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}
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}
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else
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{
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Pfn = PAE_PTE_TO_PFN(Entry);
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}
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MmDeleteHyperspaceMapping(PageDir);
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Pt = MmCreateHyperspaceMapping(Pfn);
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if (Pt == NULL)
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{
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ASSERT(FALSE);
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}
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return Pt + PAE_ADDR_TO_PTE_OFFSET(Address);
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}
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PageDir = PAE_ADDR_TO_PDE(Address);
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if (0LL == ExfInterlockedCompareExchange64UL(PageDir, &ZeroEntry, &ZeroEntry))
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{
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if (Address >= MmSystemRangeStart)
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{
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if (MmGlobalKernelPageDirectoryForPAE[PAE_ADDR_TO_PDE_OFFSET(Address)] == 0LL)
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{
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if (Create == FALSE)
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{
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return NULL;
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}
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Status = MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &Pfn);
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if (!NT_SUCCESS(Status))
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{
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ASSERT(FALSE);
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}
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Entry = PAE_PFN_TO_PTE(Pfn) | PA_PRESENT | PA_READWRITE;
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if (Ke386GlobalPagesEnabled)
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{
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Entry |= PA_GLOBAL;
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}
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if (0LL != ExfInterlockedCompareExchange64UL(&MmGlobalKernelPageDirectoryForPAE[PAE_ADDR_TO_PDE_OFFSET(Address)], &Entry, &ZeroEntry))
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{
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MmReleasePageMemoryConsumer(MC_NPPOOL, Pfn);
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}
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}
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(void)ExfInterlockedCompareExchange64UL(PageDir, &MmGlobalKernelPageDirectoryForPAE[PAE_ADDR_TO_PDE_OFFSET(Address)], &ZeroEntry);
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}
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else
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{
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if (Create == FALSE)
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{
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return NULL;
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}
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Status = MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &Pfn);
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if (!NT_SUCCESS(Status))
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{
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ASSERT(FALSE);
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}
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Entry = PFN_TO_PTE(Pfn) | PA_PRESENT | PA_READWRITE | PA_USER;
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Entry = ExfInterlockedCompareExchange64UL(PageDir, &Entry, &ZeroEntry);
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if (Entry != 0LL)
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{
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MmReleasePageMemoryConsumer(MC_NPPOOL, Pfn);
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}
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}
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}
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return (PULONGLONG)PAE_ADDR_TO_PTE(Address);
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}
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static PULONG
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MmGetPageTableForProcess(PEPROCESS Process, PVOID Address, BOOLEAN Create)
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{
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ULONG PdeOffset = ADDR_TO_PDE_OFFSET(Address);
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NTSTATUS Status;
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PFN_NUMBER Pfn;
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ULONG Entry;
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PULONG Pt, PageDir;
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if (Address < MmSystemRangeStart && Process && Process != PsGetCurrentProcess())
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{
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PageDir = MmCreateHyperspaceMapping(PTE_TO_PFN(Process->Pcb.DirectoryTableBase.LowPart));
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if (PageDir == NULL)
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{
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ASSERT(FALSE);
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}
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if (0 == InterlockedCompareExchangeUL(&PageDir[PdeOffset], 0, 0))
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{
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if (Create == FALSE)
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{
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MmDeleteHyperspaceMapping(PageDir);
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return NULL;
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}
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Status = MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &Pfn);
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if (!NT_SUCCESS(Status) || Pfn == 0)
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{
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ASSERT(FALSE);
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}
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Entry = InterlockedCompareExchangeUL(&PageDir[PdeOffset], PFN_TO_PTE(Pfn) | PA_PRESENT | PA_READWRITE | PA_USER, 0);
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if (Entry != 0)
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{
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MmReleasePageMemoryConsumer(MC_NPPOOL, Pfn);
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Pfn = PTE_TO_PFN(Entry);
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}
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}
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else
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{
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Pfn = PTE_TO_PFN(PageDir[PdeOffset]);
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}
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MmDeleteHyperspaceMapping(PageDir);
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Pt = MmCreateHyperspaceMapping(Pfn);
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if (Pt == NULL)
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{
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ASSERT(FALSE);
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}
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return Pt + ADDR_TO_PTE_OFFSET(Address);
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}
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PageDir = ADDR_TO_PDE(Address);
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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);
|
|
}
|
|
|
|
BOOLEAN MmUnmapPageTable(PULONG Pt)
|
|
{
|
|
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;
|
|
}
|
|
|
|
static ULONGLONG MmGetPageEntryForProcessForPAE(PEPROCESS Process, PVOID Address)
|
|
{
|
|
ULONGLONG Pte;
|
|
PULONGLONG Pt;
|
|
|
|
Pt = MmGetPageTableForProcessForPAE(Process, Address, FALSE);
|
|
if (Pt)
|
|
{
|
|
Pte = *Pt;
|
|
MmUnmapPageTable((PULONG)Pt);
|
|
return Pte;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static ULONG MmGetPageEntryForProcess(PEPROCESS Process, PVOID Address)
|
|
{
|
|
ULONG Pte;
|
|
PULONG Pt;
|
|
|
|
Pt = MmGetPageTableForProcess(Process, Address, FALSE);
|
|
if (Pt)
|
|
{
|
|
Pte = *Pt;
|
|
MmUnmapPageTable(Pt);
|
|
return Pte;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
PFN_NUMBER
|
|
NTAPI
|
|
MmGetPfnForProcess(PEPROCESS Process,
|
|
PVOID Address)
|
|
{
|
|
|
|
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));
|
|
}
|
|
}
|
|
|
|
VOID
|
|
NTAPI
|
|
MmDeleteVirtualMapping(PEPROCESS Process, PVOID Address,
|
|
BOOLEAN* WasDirty, PPFN_NUMBER Page)
|
|
/*
|
|
* FUNCTION: Delete a virtual mapping
|
|
*/
|
|
{
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
VOID
|
|
NTAPI
|
|
MmDeletePageFileMapping(PEPROCESS Process, PVOID Address,
|
|
SWAPENTRY* SwapEntry)
|
|
/*
|
|
* FUNCTION: Delete a virtual mapping
|
|
*/
|
|
{
|
|
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;
|
|
}
|
|
}
|
|
|
|
BOOLEAN
|
|
Mmi386MakeKernelPageTableGlobal(PVOID PAddress)
|
|
{
|
|
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);
|
|
}
|
|
|
|
BOOLEAN
|
|
NTAPI
|
|
MmIsDirtyPage(PEPROCESS Process, PVOID Address)
|
|
{
|
|
if (Ke386Pae)
|
|
{
|
|
return MmGetPageEntryForProcessForPAE(Process, Address) & PA_DIRTY ? TRUE : FALSE;
|
|
}
|
|
else
|
|
{
|
|
return MmGetPageEntryForProcess(Process, Address) & PA_DIRTY ? TRUE : FALSE;
|
|
}
|
|
}
|
|
|
|
VOID
|
|
NTAPI
|
|
MmSetCleanPage(PEPROCESS Process, PVOID Address)
|
|
{
|
|
if (Address < MmSystemRangeStart && Process == NULL)
|
|
{
|
|
DPRINT1("MmSetCleanPage is called for user space without a process.\n");
|
|
ASSERT(FALSE);
|
|
}
|
|
if (Ke386Pae)
|
|
{
|
|
PULONGLONG Pt;
|
|
ULONGLONG Pte;
|
|
ULONGLONG tmpPte;
|
|
|
|
Pt = MmGetPageTableForProcessForPAE(Process, Address, FALSE);
|
|
|
|
if (Pt == NULL)
|
|
{
|
|
ASSERT(FALSE);
|
|
}
|
|
|
|
do
|
|
{
|
|
Pte = *Pt;
|
|
tmpPte = Pte & ~PA_DIRTY;
|
|
} while (Pte != ExfInterlockedCompareExchange64UL(Pt, &tmpPte, &Pte));
|
|
|
|
if (Pte & PA_DIRTY)
|
|
{
|
|
MiFlushTlb((PULONG)Pt, Address);
|
|
}
|
|
else
|
|
{
|
|
MmUnmapPageTable((PULONG)Pt);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
PULONG Pt;
|
|
ULONG Pte;
|
|
|
|
Pt = MmGetPageTableForProcess(Process, Address, FALSE);
|
|
|
|
if (Pt == NULL)
|
|
{
|
|
ASSERT(FALSE);
|
|
}
|
|
|
|
do
|
|
{
|
|
Pte = *Pt;
|
|
} while (Pte != InterlockedCompareExchangeUL(Pt, Pte & ~PA_DIRTY, Pte));
|
|
|
|
if (Pte & PA_DIRTY)
|
|
{
|
|
MiFlushTlb(Pt, Address);
|
|
}
|
|
else
|
|
{
|
|
MmUnmapPageTable(Pt);
|
|
}
|
|
}
|
|
}
|
|
|
|
VOID
|
|
NTAPI
|
|
MmSetDirtyPage(PEPROCESS Process, PVOID Address)
|
|
{
|
|
if (Address < MmSystemRangeStart && Process == NULL)
|
|
{
|
|
DPRINT1("MmSetDirtyPage is called for user space without a process.\n");
|
|
ASSERT(FALSE);
|
|
}
|
|
if (Ke386Pae)
|
|
{
|
|
PULONGLONG Pt;
|
|
ULONGLONG Pte;
|
|
ULONGLONG tmpPte;
|
|
|
|
Pt = MmGetPageTableForProcessForPAE(Process, Address, FALSE);
|
|
if (Pt == NULL)
|
|
{
|
|
ASSERT(FALSE);
|
|
}
|
|
|
|
do
|
|
{
|
|
Pte = *Pt;
|
|
tmpPte = Pte | PA_DIRTY;
|
|
} while (Pte != ExfInterlockedCompareExchange64UL(Pt, &tmpPte, &Pte));
|
|
if (!(Pte & PA_DIRTY))
|
|
{
|
|
MiFlushTlb((PULONG)Pt, Address);
|
|
}
|
|
else
|
|
{
|
|
MmUnmapPageTable((PULONG)Pt);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
PULONG Pt;
|
|
ULONG Pte;
|
|
|
|
Pt = MmGetPageTableForProcess(Process, Address, FALSE);
|
|
if (Pt == NULL)
|
|
{
|
|
ASSERT(FALSE);
|
|
}
|
|
|
|
do
|
|
{
|
|
Pte = *Pt;
|
|
} while (Pte != InterlockedCompareExchangeUL(Pt, Pte | PA_DIRTY, Pte));
|
|
if (!(Pte & PA_DIRTY))
|
|
{
|
|
MiFlushTlb(Pt, Address);
|
|
}
|
|
else
|
|
{
|
|
MmUnmapPageTable(Pt);
|
|
}
|
|
}
|
|
}
|
|
|
|
BOOLEAN
|
|
NTAPI
|
|
MmIsPagePresent(PEPROCESS Process, PVOID Address)
|
|
{
|
|
if (Ke386Pae)
|
|
{
|
|
return MmGetPageEntryForProcessForPAE(Process, Address) & PA_PRESENT ? TRUE : FALSE;
|
|
}
|
|
else
|
|
{
|
|
return MmGetPageEntryForProcess(Process, Address) & PA_PRESENT ? TRUE : FALSE;
|
|
}
|
|
}
|
|
|
|
BOOLEAN
|
|
NTAPI
|
|
MmIsPageSwapEntry(PEPROCESS Process, PVOID Address)
|
|
{
|
|
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;
|
|
}
|
|
}
|
|
|
|
NTSTATUS
|
|
NTAPI
|
|
MmCreatePageFileMapping(PEPROCESS Process,
|
|
PVOID Address,
|
|
SWAPENTRY SwapEntry)
|
|
{
|
|
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);
|
|
}
|
|
|
|
|
|
NTSTATUS
|
|
NTAPI
|
|
MmCreateVirtualMappingUnsafe(PEPROCESS Process,
|
|
PVOID Address,
|
|
ULONG flProtect,
|
|
PPFN_NUMBER Pages,
|
|
ULONG PageCount)
|
|
{
|
|
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);
|
|
}
|
|
|
|
NTSTATUS
|
|
NTAPI
|
|
MmCreateVirtualMapping(PEPROCESS Process,
|
|
PVOID Address,
|
|
ULONG flProtect,
|
|
PPFN_NUMBER Pages,
|
|
ULONG PageCount)
|
|
{
|
|
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));
|
|
}
|
|
|
|
ULONG
|
|
NTAPI
|
|
MmGetPageProtect(PEPROCESS Process, PVOID Address)
|
|
{
|
|
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);
|
|
}
|
|
|
|
VOID
|
|
NTAPI
|
|
MmSetPageProtect(PEPROCESS Process, PVOID Address, ULONG flProtect)
|
|
{
|
|
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);
|
|
}
|
|
}
|
|
|
|
VOID
|
|
INIT_FUNCTION
|
|
NTAPI
|
|
MmInitGlobalKernelPageDirectory(VOID)
|
|
{
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* EOF */
|