mmfault.c File Reference

#include <ntoskrnl.h>
#include <cache/section/newmm.h>
#include <debug.h>
#include "ARM3/miarm.h"

Include dependency graph for mmfault.c:

Go to the source code of this file.

Macros
#define	NDEBUG
#define	MODULE_INVOLVED_IN_ARM3

Functions
NTSTATUS NTAPI	MmpAccessFault (KPROCESSOR_MODE Mode, ULONG_PTR Address, BOOLEAN FromMdl, ULONG FaultCode)
NTSTATUS NTAPI	MmNotPresentFault (KPROCESSOR_MODE Mode, ULONG_PTR Address, BOOLEAN FromMdl)
BOOLEAN	Mmi386MakeKernelPageTableGlobal (PVOID Address)
VOID NTAPI	MmRebalanceMemoryConsumersAndWait (VOID)
NTSTATUS NTAPI	MmAccessFault (IN ULONG FaultCode, IN PVOID Address, IN KPROCESSOR_MODE Mode, IN PVOID TrapInformation)

Variables
MM_AVL_TABLE	MiRosKernelVadRoot

Macro Definition Documentation

MODULE_INVOLVED_IN_ARM3

#define MODULE_INVOLVED_IN_ARM3

Definition at line 16 of file mmfault.c.

NDEBUG

#define NDEBUG

Definition at line 13 of file mmfault.c.

Function Documentation

MmAccessFault()

NTSTATUS NTAPI MmAccessFault	(	IN ULONG	FaultCode,
		IN PVOID	Address,
		IN KPROCESSOR_MODE	Mode,
		IN PVOID	TrapInformation
	)

Definition at line 220 of file mmfault.c.

{
    PMMVAD Vad = NULL;
    NTSTATUS Status;
    BOOLEAN IsArm3Fault = FALSE;
 
    /* Cute little hack for ROS */
    if ((ULONG_PTR)Address >= (ULONG_PTR)MmSystemRangeStart)
    {
#ifdef _M_IX86
        /* Check for an invalid page directory in kernel mode */
        if (Mmi386MakeKernelPageTableGlobal(Address))
        {
            /* All is well with the world */
            return STATUS_SUCCESS;
        }
#endif
    }
 
    /* Handle shared user page / page table, which don't have a VAD / MemoryArea */
    if ((PAGE_ALIGN(Address) == (PVOID)MM_SHARED_USER_DATA_VA) ||
        MI_IS_PAGE_TABLE_ADDRESS(Address))
    {
        /* This is an ARM3 fault */
        DPRINT("ARM3 fault %p\n", Address);
        return MmArmAccessFault(FaultCode, Address, Mode, TrapInformation);
    }
 
    /* Is there a ReactOS address space yet? */
    if (MmGetKernelAddressSpace())
    {
        if (Address > MM_HIGHEST_USER_ADDRESS)
        {
            /* Check if this is an ARM3 memory area */
            MiLockWorkingSetShared(PsGetCurrentThread(), &MmSystemCacheWs);
            Vad = MiLocateVad(&MiRosKernelVadRoot, Address);
 
            if ((Vad != NULL) && !MI_IS_ROSMM_VAD(Vad))
            {
                IsArm3Fault = TRUE;
            }
 
            MiUnlockWorkingSetShared(PsGetCurrentThread(), &MmSystemCacheWs);
        }
        else
        {
            /* Could this be a VAD fault from user-mode? */
            MiLockProcessWorkingSetShared(PsGetCurrentProcess(), PsGetCurrentThread());
            Vad = MiLocateVad(&PsGetCurrentProcess()->VadRoot, Address);
 
            if ((Vad != NULL) && !MI_IS_ROSMM_VAD(Vad))
            {
                IsArm3Fault = TRUE;
            }
 
            MiUnlockProcessWorkingSetShared(PsGetCurrentProcess(), PsGetCurrentThread());
        }
    }
 
    /* Is this an ARM3 VAD, or is there no address space yet? */
    if (IsArm3Fault ||
        ((Vad == NULL) &&
         ((ULONG_PTR)Address >= (ULONG_PTR)MmPagedPoolStart) &&
         ((ULONG_PTR)Address < (ULONG_PTR)MmPagedPoolEnd)) ||
        (!MmGetKernelAddressSpace()))
    {
        /* This is an ARM3 fault */
        DPRINT("ARM3 fault %p\n", Vad);
        return MmArmAccessFault(FaultCode, Address, Mode, TrapInformation);
    }
 
Retry:
    /* Keep same old ReactOS Behaviour */
    if (!MI_IS_NOT_PRESENT_FAULT(FaultCode))
    {
        /* Call access fault */
        Status = MmpAccessFault(Mode, (ULONG_PTR)Address, TrapInformation ? FALSE : TRUE, FaultCode);
    }
    else
    {
        /* Call not present */
        Status = MmNotPresentFault(Mode, (ULONG_PTR)Address, TrapInformation ? FALSE : TRUE);
    }
 
    if (Status == STATUS_NO_MEMORY)
    {
        MmRebalanceMemoryConsumersAndWait();
        goto Retry;
    }
 
    return Status;
}

Referenced by KiDataAbortHandler(), KiTrap0EHandler(), MiLockVirtualMemory(), MiMakeSystemAddressValid(), MiMakeSystemAddressValidPfn(), and MmProbeAndLockPages().

Mmi386MakeKernelPageTableGlobal()

BOOLEAN Mmi386MakeKernelPageTableGlobal

(

PVOID

Address

)

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().

MmNotPresentFault()

NTSTATUS NTAPI MmNotPresentFault	(	KPROCESSOR_MODE	Mode,
		ULONG_PTR	Address,
		BOOLEAN	FromMdl
	)

Definition at line 122 of file mmfault.c.

{
    PMMSUPPORT AddressSpace;
    MEMORY_AREA* MemoryArea;
    NTSTATUS Status;
 
    DPRINT("MmNotPresentFault(Mode %d, Address %x)\n", Mode, Address);
 
    if (KeGetCurrentIrql() >= DISPATCH_LEVEL)
    {
        DPRINT1("Page fault at high IRQL was %u, address %x\n", KeGetCurrentIrql(), Address);
        return(STATUS_UNSUCCESSFUL);
    }
 
    /*
     * Find the memory area for the faulting address
     */
    if (Address >= (ULONG_PTR)MmSystemRangeStart)
    {
        /*
         * Check permissions
         */
        if (Mode != KernelMode)
        {
            DPRINT1("Address: %x\n", Address);
            return(STATUS_ACCESS_VIOLATION);
        }
        AddressSpace = MmGetKernelAddressSpace();
    }
    else
    {
        AddressSpace = &PsGetCurrentProcess()->Vm;
    }
 
    if (!FromMdl)
    {
        MmLockAddressSpace(AddressSpace);
    }
 
    /*
     * Call the memory area specific fault handler
     */
    do
    {
        MemoryArea = MmLocateMemoryAreaByAddress(AddressSpace, (PVOID)Address);
        if (MemoryArea == NULL || MemoryArea->DeleteInProgress)
        {
            if (!FromMdl)
            {
                MmUnlockAddressSpace(AddressSpace);
            }
            return (STATUS_ACCESS_VIOLATION);
        }
 
        switch (MemoryArea->Type)
        {
        case MEMORY_AREA_SECTION_VIEW:
            Status = MmNotPresentFaultSectionView(AddressSpace,
                                                  MemoryArea,
                                                  (PVOID)Address,
                                                  !FromMdl);
            break;
#ifdef NEWCC
        case MEMORY_AREA_CACHE:
            // This code locks for itself to keep from having to break a lock
            // passed in.
            if (!FromMdl)
                MmUnlockAddressSpace(AddressSpace);
            Status = MmNotPresentFaultCacheSection(Mode, Address, FromMdl);
            if (!FromMdl)
                MmLockAddressSpace(AddressSpace);
            break;
#endif
        default:
            Status = STATUS_ACCESS_VIOLATION;
            break;
        }
    }
    while (Status == STATUS_MM_RESTART_OPERATION);
 
    DPRINT("Completed page fault handling\n");
    if (!FromMdl)
    {
        MmUnlockAddressSpace(AddressSpace);
    }
    return(Status);
}

Referenced by MmAccessFault().

MmpAccessFault()

NTSTATUS NTAPI MmpAccessFault	(	KPROCESSOR_MODE	Mode,
		ULONG_PTR	Address,
		BOOLEAN	FromMdl,
		ULONG	FaultCode
	)

Definition at line 25 of file mmfault.c.

{
    PMMSUPPORT AddressSpace;
    MEMORY_AREA* MemoryArea;
    NTSTATUS Status;
 
    DPRINT("MmAccessFault(Mode %d, Address %x)\n", Mode, Address);
 
    if (KeGetCurrentIrql() >= DISPATCH_LEVEL)
    {
        DPRINT1("Page fault at high IRQL was %u\n", KeGetCurrentIrql());
        return(STATUS_UNSUCCESSFUL);
    }
 
    /* Instruction fetch and the page is present.
       This means the page is NX and we cannot do anything to "fix" it. */
    if (MI_IS_INSTRUCTION_FETCH(FaultCode))
    {
        DPRINT1("Page fault instruction fetch at %p\n", Address);
        return STATUS_ACCESS_VIOLATION;
    }
 
    /*
     * Find the memory area for the faulting address
     */
    if (Address >= (ULONG_PTR)MmSystemRangeStart)
    {
        /*
         * Check permissions
         */
        if (Mode != KernelMode)
        {
            DPRINT1("MmAccessFault(Mode %d, Address %x)\n", Mode, Address);
            return(STATUS_ACCESS_VIOLATION);
        }
        AddressSpace = MmGetKernelAddressSpace();
    }
    else
    {
        AddressSpace = &PsGetCurrentProcess()->Vm;
    }
 
    if (!FromMdl)
    {
        MmLockAddressSpace(AddressSpace);
    }
    do
    {
        MemoryArea = MmLocateMemoryAreaByAddress(AddressSpace, (PVOID)Address);
        if (MemoryArea == NULL || MemoryArea->DeleteInProgress)
        {
            if (!FromMdl)
            {
                MmUnlockAddressSpace(AddressSpace);
            }
            return (STATUS_ACCESS_VIOLATION);
        }
 
        switch (MemoryArea->Type)
        {
        case MEMORY_AREA_SECTION_VIEW:
            Status = MmAccessFaultSectionView(AddressSpace,
                                              MemoryArea,
                                              (PVOID)Address,
                                              !FromMdl);
            break;
#ifdef NEWCC
        case MEMORY_AREA_CACHE:
            // This code locks for itself to keep from having to break a lock
            // passed in.
            if (!FromMdl)
                MmUnlockAddressSpace(AddressSpace);
            Status = MmAccessFaultCacheSection(Mode, Address, FromMdl);
            if (!FromMdl)
                MmLockAddressSpace(AddressSpace);
            break;
#endif
        default:
            Status = STATUS_ACCESS_VIOLATION;
            break;
        }
    }
    while (Status == STATUS_MM_RESTART_OPERATION);
 
    DPRINT("Completed page fault handling\n");
    if (!FromMdl)
    {
        MmUnlockAddressSpace(AddressSpace);
    }
    return(Status);
}

Referenced by MmAccessFault().

MmRebalanceMemoryConsumersAndWait()

VOID NTAPI MmRebalanceMemoryConsumersAndWait

(

VOID

)

Definition at line 300 of file balance.c.

{
    ASSERT(PsGetCurrentProcess()->AddressCreationLock.Owner != KeGetCurrentThread());
    ASSERT(!MM_ANY_WS_LOCK_HELD(PsGetCurrentThread()));
    ASSERT(KeGetCurrentIrql() < DISPATCH_LEVEL);
 
    KeResetEvent(&MiBalancerDoneEvent);
    MmRebalanceMemoryConsumers();
    KeWaitForSingleObject(&MiBalancerDoneEvent, Executive, KernelMode, FALSE, NULL);
}

Referenced by MmAccessFault().

Variable Documentation

MiRosKernelVadRoot

MM_AVL_TABLE MiRosKernelVadRoot

extern

Definition at line 54 of file marea.c.

Referenced by MmAccessFault(), MmFindGap(), MmFreeMemoryArea(), MmInsertMemoryArea(), MmIsAddressRangeFree(), and MmLocateMemoryAreaByRegion().