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99 lines
3.1 KiB
C
99 lines
3.1 KiB
C
/*
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* PROJECT: ReactOS Kernel
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* LICENSE: BSD-3-Clause (https://spdx.org/licenses/BSD-3-Clause)
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* FILE: ntoskrnl/mm/i386/procsup.c
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* PURPOSE: Process handling for i386 architecture
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* PROGRAMMERS: Jérôme Gardou
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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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#define MODULE_INVOLVED_IN_ARM3
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#include <mm/ARM3/miarm.h>
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BOOLEAN
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MiArchCreateProcessAddressSpace(
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_In_ PEPROCESS Process,
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_In_ PULONG_PTR DirectoryTableBase)
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{
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PFN_NUMBER PdeIndex = DirectoryTableBase[0] >> PAGE_SHIFT;
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PFN_NUMBER HyperIndex = DirectoryTableBase[1] >> PAGE_SHIFT;
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PMMPTE PointerPte;
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MMPTE PdePte, TempPte;
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PMMPTE PteTable;
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ULONG PdeOffset;
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KIRQL OldIrql;
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/* Get a PTE */
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PointerPte = MiReserveSystemPtes(1, SystemPteSpace);
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if (!PointerPte)
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return FALSE;
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PteTable = MiPteToAddress(PointerPte);
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/* Build a page table for hyper space */
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MI_MAKE_HARDWARE_PTE_KERNEL(&PdePte,
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PointerPte,
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MM_READWRITE,
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HyperIndex);
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/* Set it dirty and map it */
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MI_MAKE_DIRTY_PAGE(&PdePte);
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MI_WRITE_VALID_PTE(PointerPte, PdePte);
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/* Now write the PTE/PDE entry for the working set list index itself */
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TempPte = ValidKernelPteLocal;
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TempPte.u.Hard.PageFrameNumber = Process->WorkingSetPage;
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PdeOffset = MiAddressToPteOffset(MmWorkingSetList);
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PteTable[PdeOffset] = TempPte;
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/* Now we map the page directory */
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MI_MAKE_HARDWARE_PTE_KERNEL(&PdePte,
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PointerPte,
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MM_READWRITE,
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PdeIndex);
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/* Set it dirty and map it */
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MI_MAKE_DIRTY_PAGE(&PdePte);
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*PointerPte = PdePte;
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/* We changed the page! */
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__invlpg(PteTable);
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/* Now get the page directory (which we'll double map, so call it a page table) */
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PteTable = MiPteToAddress(PointerPte);
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/* Copy all the kernel mappings */
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PdeOffset = MiGetPdeOffset(MmSystemRangeStart);
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RtlCopyMemory(&PteTable[PdeOffset],
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MiAddressToPde(MmSystemRangeStart),
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PAGE_SIZE - PdeOffset * sizeof(MMPTE));
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/* Now write the PTE/PDE entry for hyperspace itself */
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TempPte = ValidKernelPteLocal;
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TempPte.u.Hard.PageFrameNumber = HyperIndex;
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PdeOffset = MiGetPdeOffset(HYPER_SPACE);
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PteTable[PdeOffset] = TempPte;
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/* Sanity check */
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PdeOffset++;
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ASSERT(MiGetPdeOffset(MmHyperSpaceEnd) >= PdeOffset);
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/* Now do the x86 trick of making the PDE a page table itself */
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PdeOffset = MiGetPdeOffset(PTE_BASE);
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TempPte.u.Hard.PageFrameNumber = PdeIndex;
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PteTable[PdeOffset] = TempPte;
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/* Let go of the system PTE */
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MiReleaseSystemPtes(PointerPte, 1, SystemPteSpace);
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/* Insert us into the Mm process list */
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OldIrql = MiAcquireExpansionLock();
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InsertTailList(&MmProcessList, &Process->MmProcessLinks);
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MiReleaseExpansionLock(OldIrql);
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return TRUE;
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}
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