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Added new MEMORY_AREA_NO_ACCESS type.
Make the top and bottom 64KB of process memory space and the 60KB above the shared user page from unaccessible. Introduced MmSystemRangeStart. svn path=/trunk/; revision=4705
This commit is contained in:
Eric Kohl
parent
e1c437438c
commit
397169c1a8
5 changed files with 91 additions and 21 deletions
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@ -28,6 +28,7 @@ typedef ULONG SWAPENTRY;
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#define MEMORY_AREA_SHARED_DATA (10)
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#define MEMORY_AREA_KERNEL_STACK (11)
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#define MEMORY_AREA_PAGED_POOL (12)
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#define MEMORY_AREA_NO_ACCESS (13)
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#define PAGE_TO_SECTION_PAGE_DIRECTORY_OFFSET(x) \
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((x) / (4*1024*1024))
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@ -151,6 +152,12 @@ typedef struct _MADDRESS_SPACE
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ULONG PageTableRefCountTableSize;
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} MADDRESS_SPACE, *PMADDRESS_SPACE;
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/* VARIABLES */
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extern PVOID MmSystemRangeStart;
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/* FUNCTIONS */
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VOID MmLockAddressSpace(PMADDRESS_SPACE AddressSpace);
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@ -218,7 +218,7 @@ PVOID MmFindGapBottomUp(PMADDRESS_SPACE AddressSpace, ULONG Length)
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DPRINT("MmFindGapBottomUp(Length %x)\n",Length);
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ListHead = &AddressSpace->MAreaListHead;
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current_entry = ListHead->Flink;
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while (current_entry->Flink!=ListHead)
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{
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@ -273,9 +273,9 @@ PVOID MmFindGapTopDown(PMADDRESS_SPACE AddressSpace, ULONG Length)
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DPRINT("MmFindGapTopDown(Length %lx)\n",Length);
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if (AddressSpace->LowestAddress < KERNEL_BASE)
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if (AddressSpace->LowestAddress < KERNEL_BASE) //(ULONG_PTR)MmSystemRangeStart)
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{
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HighestAddress = (PVOID)0x7FFE0000; /* Start below the PEB */
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HighestAddress = MmHighestUserAddress;
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}
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else
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{
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@ -294,12 +294,12 @@ PVOID MmFindGapTopDown(PMADDRESS_SPACE AddressSpace, ULONG Length)
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if (BottomAddress < HighestAddress)
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{
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Gap = TopAddress - BottomAddress;
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Gap = TopAddress - BottomAddress + 1;
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DPRINT("Bottom %p Top %p Gap %lx\n", BottomAddress, TopAddress, Gap);
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if (Gap >= Length)
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{
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DPRINT1("Found gap at %p\n", TopAddress - Length);
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return(TopAddress - Length);
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DPRINT("Found gap at %p\n", TopAddress - Length);
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return(TopAddress - Length + 1);
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}
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TopAddress = current->BaseAddress;
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}
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@ -308,11 +308,11 @@ PVOID MmFindGapTopDown(PMADDRESS_SPACE AddressSpace, ULONG Length)
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if (current_entry == ListHead)
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{
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Address = (PVOID)HighestAddress - Length;
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Address = (PVOID)HighestAddress - Length + 1;
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}
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else
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{
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Address = TopAddress - Length;
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Address = TopAddress - Length + 1;
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}
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/* Check if enough space for the block */
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@ -16,7 +16,7 @@
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* $Id: mm.c,v 1.60 2002/09/08 10:23:35 chorns Exp $
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/* $Id: mm.c,v 1.61 2003/05/17 19:16:02 ekohl Exp $
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*
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* COPYRIGHT: See COPYING in the top directory
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* PROJECT: ReactOS kernel
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@ -41,9 +41,11 @@
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/* GLOBALS *****************************************************************/
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PVOID EXPORTED MmUserProbeAddress = NULL;
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PVOID EXPORTED MmUserProbeAddress = NULL;
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PVOID EXPORTED MmHighestUserAddress = NULL;
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MM_STATS MmStats;
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PVOID MmSystemRangeStart = NULL;
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MM_STATS MmStats;
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/* FUNCTIONS ****************************************************************/
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@ -76,6 +78,9 @@ NTSTATUS MmReleaseMemoryArea(PEPROCESS Process, PMEMORY_AREA Marea)
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NULL);
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break;
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case MEMORY_AREA_NO_ACCESS:
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return(STATUS_SUCCESS);
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default:
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KeBugCheck(0);
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}
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@ -210,24 +215,24 @@ NTSTATUS MmAccessFault(KPROCESSOR_MODE Mode,
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break;
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case MEMORY_AREA_PAGED_POOL:
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Status = STATUS_SUCCESS;
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break;
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Status = STATUS_SUCCESS;
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break;
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case MEMORY_AREA_SECTION_VIEW:
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Status = MmAccessFaultSectionView(AddressSpace,
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MemoryArea,
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(PVOID)Address,
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Locked);
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break;
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case MEMORY_AREA_VIRTUAL_MEMORY:
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Status = STATUS_UNSUCCESSFUL;
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break;
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case MEMORY_AREA_SHARED_DATA:
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Status = STATUS_UNSUCCESSFUL;
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break;
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default:
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Status = STATUS_UNSUCCESSFUL;
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break;
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@ -1,4 +1,4 @@
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/* $Id: mminit.c,v 1.45 2003/05/17 15:28:58 ekohl Exp $
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/* $Id: mminit.c,v 1.46 2003/05/17 19:16:03 ekohl Exp $
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*
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* COPYRIGHT: See COPYING in the top directory
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* PROJECT: ReactOS kernel
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@ -248,6 +248,7 @@ VOID MmInit1(ULONG FirstKrnlPhysAddr,
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/*
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* FIXME: Set this based on the system command line
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*/
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MmSystemRangeStart = (PVOID)KERNEL_BASE; // 0xC0000000
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MmUserProbeAddress = (PVOID)0x7fff0000;
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MmHighestUserAddress = (PVOID)0x7ffeffff;
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@ -1,4 +1,4 @@
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/* $Id: process.c,v 1.100 2003/05/17 15:29:50 ekohl Exp $
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/* $Id: process.c,v 1.101 2003/05/17 19:16:39 ekohl Exp $
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*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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@ -585,9 +585,66 @@ NtCreateProcess(OUT PHANDLE ProcessHandle,
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/*
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* Now we have created the process proper
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*/
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/* Create the shared data page */
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MmLockAddressSpace(&Process->AddressSpace);
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/* Protect the highest 64KB of the process address space */
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BaseAddress = MmUserProbeAddress;
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Status = MmCreateMemoryArea(Process,
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&Process->AddressSpace,
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MEMORY_AREA_NO_ACCESS,
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&BaseAddress,
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0x10000,
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PAGE_NOACCESS,
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&MemoryArea,
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FALSE,
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FALSE);
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if (!NT_SUCCESS(Status))
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{
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MmUnlockAddressSpace(&Process->AddressSpace);
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DPRINT1("Failed to protect the highest 64KB of the process address space\n");
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KeBugCheck(0);
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}
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/* Protect the lowest 64KB of the process address space */
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#if 0
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BaseAddress = (PVOID)0x00000000;
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Status = MmCreateMemoryArea(Process,
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&Process->AddressSpace,
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MEMORY_AREA_NO_ACCESS,
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&BaseAddress,
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0x10000,
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PAGE_NOACCESS,
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&MemoryArea,
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FALSE,
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FALSE);
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if (!NT_SUCCESS(Status))
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{
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MmUnlockAddressSpace(&Process->AddressSpace);
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DPRINT1("Failed to protect the lowest 64KB of the process address space\n");
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KeBugCheck(0);
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}
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#endif
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/* Protect the 60KB above the shared user page */
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BaseAddress = (PVOID)USER_SHARED_DATA + PAGE_SIZE;
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Status = MmCreateMemoryArea(Process,
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&Process->AddressSpace,
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MEMORY_AREA_NO_ACCESS,
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&BaseAddress,
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0x10000 - PAGE_SIZE,
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PAGE_NOACCESS,
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&MemoryArea,
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FALSE,
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FALSE);
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if (!NT_SUCCESS(Status))
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{
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MmUnlockAddressSpace(&Process->AddressSpace);
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DPRINT1("Failed to protect the memory above the shared user page\n");
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KeBugCheck(0);
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}
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/* Create the shared data page */
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BaseAddress = (PVOID)USER_SHARED_DATA;
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Status = MmCreateMemoryArea(Process,
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&Process->AddressSpace,
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