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https://github.com/reactos/reactos.git
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[NTOSKRNL/MM]
- First drop of a new implementation of NtAllocateVirtualMemory. Very incomplete, don't hesitate to drop in and complete it. For now, only MEM_RESERVE is kind of supported, as well as MEM_RESERVE|MEM_COMMIT svn path=/trunk/; revision=55645
This commit is contained in:
Jérôme Gardou
parent
aff775994d
commit
ea17e55e0a
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@ -2773,4 +2773,359 @@ NtQueryVirtualMemory(IN HANDLE ProcessHandle,
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return Status;
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}
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#ifdef __USE_ARM3__
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/*
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* @implemented
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*/
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NTSTATUS
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NTAPI
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NtAllocateVirtualMemory(IN HANDLE ProcessHandle,
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IN OUT PVOID* UBaseAddress,
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IN ULONG_PTR ZeroBits,
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IN OUT PSIZE_T URegionSize,
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IN ULONG AllocationType,
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IN ULONG Protect)
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{
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PEPROCESS Process;
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ULONG Type;
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NTSTATUS Status = STATUS_SUCCESS;
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PVOID BaseAddress;
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ULONG RegionSize;
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PMMVAD Vad;
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PMMADDRESS_NODE ParentNode;
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ULONG_PTR StartVpn, EndVpn;
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PHYSICAL_ADDRESS BoundaryAddressMultiple;
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PEPROCESS CurrentProcess = PsGetCurrentProcess();
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KPROCESSOR_MODE PreviousMode = KeGetPreviousMode();
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KAPC_STATE ApcState;
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ULONG ProtectionMask;
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BOOLEAN Attached = FALSE;
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BoundaryAddressMultiple.QuadPart = 0;
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TABLE_SEARCH_RESULT Result;
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PAGED_CODE();
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/* Check for valid Zero bits */
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if (ZeroBits > 21)
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{
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DPRINT1("Too many zero bits\n");
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return STATUS_INVALID_PARAMETER_3;
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}
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/* Check for valid Allocation Types */
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if ((AllocationType & ~(MEM_COMMIT | MEM_RESERVE | MEM_RESET | MEM_PHYSICAL |
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MEM_TOP_DOWN | MEM_WRITE_WATCH)))
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{
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DPRINT1("Invalid Allocation Type\n");
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return STATUS_INVALID_PARAMETER_5;
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}
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/* Check for at least one of these Allocation Types to be set */
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if (!(AllocationType & (MEM_COMMIT | MEM_RESERVE | MEM_RESET)))
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{
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DPRINT1("No memory allocation base type\n");
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return STATUS_INVALID_PARAMETER_5;
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}
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/* MEM_RESET is an exclusive flag, make sure that is valid too */
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if ((AllocationType & MEM_RESET) && (AllocationType != MEM_RESET))
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{
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DPRINT1("Invalid use of MEM_RESET\n");
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return STATUS_INVALID_PARAMETER_5;
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}
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/* Check if large pages are being used */
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if (AllocationType & MEM_LARGE_PAGES)
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{
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/* Large page allocations MUST be committed */
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if (!(AllocationType & MEM_COMMIT))
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{
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DPRINT1("Must supply MEM_COMMIT with MEM_LARGE_PAGES\n");
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return STATUS_INVALID_PARAMETER_5;
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}
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/* These flags are not allowed with large page allocations */
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if (AllocationType & (MEM_PHYSICAL | MEM_RESET | MEM_WRITE_WATCH))
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{
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DPRINT1("Using illegal flags with MEM_LARGE_PAGES\n");
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return STATUS_INVALID_PARAMETER_5;
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}
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}
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/* MEM_WRITE_WATCH can only be used if MEM_RESERVE is also used */
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if ((AllocationType & MEM_WRITE_WATCH) && !(AllocationType & MEM_RESERVE))
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{
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DPRINT1("MEM_WRITE_WATCH used without MEM_RESERVE\n");
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return STATUS_INVALID_PARAMETER_5;
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}
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/* MEM_PHYSICAL can only be used if MEM_RESERVE is also used */
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if ((AllocationType & MEM_PHYSICAL) && !(AllocationType & MEM_RESERVE))
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{
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DPRINT1("MEM_WRITE_WATCH used without MEM_RESERVE\n");
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return STATUS_INVALID_PARAMETER_5;
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}
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/* Check for valid MEM_PHYSICAL usage */
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if (AllocationType & MEM_PHYSICAL)
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{
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/* Only these flags are allowed with MEM_PHYSIAL */
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if (AllocationType & ~(MEM_RESERVE | MEM_TOP_DOWN | MEM_PHYSICAL))
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{
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DPRINT1("Using illegal flags with MEM_PHYSICAL\n");
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return STATUS_INVALID_PARAMETER_5;
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}
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/* Then make sure PAGE_READWRITE is used */
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if (Protect != PAGE_READWRITE)
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{
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DPRINT1("MEM_PHYSICAL used without PAGE_READWRITE\n");
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return STATUS_INVALID_PARAMETER_6;
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}
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}
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/* Calculate the protection mask and make sure it's valid */
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ProtectionMask = MiMakeProtectionMask(Protect);
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if (ProtectionMask == MM_INVALID_PROTECTION)
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{
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DPRINT1("Invalid protection mask\n");
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return STATUS_INVALID_PAGE_PROTECTION;
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}
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/* Enter SEH */
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_SEH2_TRY
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{
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/* Check for user-mode parameters */
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if (PreviousMode != KernelMode)
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{
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/* Make sure they are writable */
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ProbeForWritePointer(UBaseAddress);
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ProbeForWriteUlong(URegionSize);
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}
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/* Capture their values */
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BaseAddress = *UBaseAddress;
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RegionSize = *URegionSize;
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}
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_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
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{
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/* Return the exception code */
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_SEH2_YIELD(return _SEH2_GetExceptionCode());
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}
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_SEH2_END;
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/* Make sure there's a size specified */
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if (!RegionSize)
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{
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DPRINT1("Region size is invalid (zero)\n");
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return STATUS_INVALID_PARAMETER_4;
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}
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RegionSize = PAGE_ROUND_UP((ULONG_PTR)BaseAddress + RegionSize) -
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PAGE_ROUND_DOWN(BaseAddress);
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BaseAddress = (PVOID)PAGE_ROUND_DOWN(BaseAddress);
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StartVpn = (ULONG_PTR)BaseAddress >> PAGE_SHIFT;
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EndVpn = ((ULONG_PTR)BaseAddress + RegionSize - 1) >> PAGE_SHIFT;
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/* Make sure the allocation isn't past the VAD area */
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if (BaseAddress >= MM_HIGHEST_VAD_ADDRESS)
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{
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DPRINT1("Virtual allocation base above User Space\n");
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return STATUS_INVALID_PARAMETER_2;
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}
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/* Make sure the allocation wouldn't overflow past the VAD area */
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if ((((ULONG_PTR)MM_HIGHEST_VAD_ADDRESS + 1) - (ULONG_PTR)BaseAddress) < RegionSize)
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{
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DPRINT1("Region size would overflow into kernel-memory\n");
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return STATUS_INVALID_PARAMETER_4;
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}
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/* Check if this is for the current process */
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if (ProcessHandle == NtCurrentProcess())
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{
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/* We already have the current process, no need to go through Ob */
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Process = CurrentProcess;
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}
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else
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{
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/* Reference the handle for correct permissions */
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Status = ObReferenceObjectByHandle(ProcessHandle,
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PROCESS_VM_OPERATION,
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PsProcessType,
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PreviousMode,
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(PVOID*)&Process,
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NULL);
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if (!NT_SUCCESS(Status)) return Status;
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/* Check if not running in the current process */
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if (CurrentProcess != Process)
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{
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/* Attach to it */
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KeStackAttachProcess(&Process->Pcb, &ApcState);
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Attached = TRUE;
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}
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}
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/* Check for large page allocations */
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if (AllocationType & MEM_LARGE_PAGES)
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{
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/* The lock memory privilege is required */
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if (!SeSinglePrivilegeCheck(SeLockMemoryPrivilege, PreviousMode))
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{
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/* Fail without it */
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DPRINT1("Privilege not held for MEM_LARGE_PAGES\n");
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if (Attached) KeUnstackDetachProcess(&ApcState);
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if (ProcessHandle != NtCurrentProcess()) ObDereferenceObject(Process);
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return STATUS_PRIVILEGE_NOT_HELD;
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}
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}
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/*
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* Copy on Write is reserved for system use. This case is a certain failure
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* but there may be other cases...needs more testing
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*/
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if ((!BaseAddress || (AllocationType & MEM_RESERVE)) &&
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(Protect & (PAGE_WRITECOPY | PAGE_EXECUTE_WRITECOPY)))
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{
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DPRINT1("Copy on write is not supported by VirtualAlloc\n");
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if (Attached) KeUnstackDetachProcess(&ApcState);
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if (ProcessHandle != NtCurrentProcess()) ObDereferenceObject(Process);
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return STATUS_INVALID_PAGE_PROTECTION;
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}
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Type = (AllocationType & MEM_COMMIT) ? MEM_COMMIT : MEM_RESERVE;
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DPRINT("Type %x\n", Type);
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/* Lock the process address space */
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KeAcquireGuardedMutex(&Process->AddressCreationLock);
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if(BaseAddress != 0)
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{
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/*
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* An address was provided. Let's see if we've already
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* something there
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*/
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if(MiCheckForConflictingNode(StartVpn, EndVpn, &Process->VadRoot) != NULL)
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{
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/* Can't reserve twice the same range */
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if(AllocationType & MEM_RESERVE)
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{
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Status = STATUS_CONFLICTING_ADDRESSES;
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DPRINT1("Trying to reserve twice the same range.\n");
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goto cleanup;
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}
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/* Great there's already something there. What shall we do ? */
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if(AllocationType == MEM_RESET)
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{
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UNIMPLEMENTED;
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/* Reset the dirty bits for each PTEs */
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goto cleanup;
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}
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else
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{
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ASSERT(AllocationType & MEM_COMMIT);
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UNIMPLEMENTED;
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/* Mark the VAD as committed */
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goto cleanup;
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}
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}
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/* There's nothing */
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if(!(AllocationType & MEM_RESERVE))
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{
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Status = STATUS_ACCESS_DENIED;
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goto cleanup;
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}
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/* Now we can reserve our chunk of memory */
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goto buildVad;
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}
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/* No base address was given. */
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if(!(AllocationType & MEM_RESERVE))
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{
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DPRINT1("Providing NULL base address witout MEM_RESERVE.\n");
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ASSERT(FALSE);
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Status = STATUS_INVALID_PARAMETER_5;
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goto cleanup;
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}
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/* Find an empty range in Address Space */
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if(AllocationType & MEM_TOP_DOWN)
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{
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/* Top down allocation */
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Result = MiFindEmptyAddressRangeDownTree(RegionSize,
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(ULONG_PTR)MM_HIGHEST_VAD_ADDRESS,
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(ZeroBits > PAGE_SHIFT) ? 1 << ZeroBits : PAGE_SIZE,
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&Process->VadRoot,
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(PULONG_PTR)&BaseAddress,
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&ParentNode);
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if(Result == TableFoundNode)
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{
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/* This means failure */
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Status = STATUS_NO_MEMORY;
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goto cleanup;
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}
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}
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else
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{
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/* Good old bottom up allocation */
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Status = MiFindEmptyAddressRangeInTree(RegionSize,
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(ZeroBits > PAGE_SHIFT) ? 1 << ZeroBits : PAGE_SIZE,
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&Process->VadRoot,
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&ParentNode,
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(PULONG_PTR)&BaseAddress);
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if(!NT_SUCCESS(Status))
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{
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/* Failed... */
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goto cleanup;
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}
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}
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StartVpn = (ULONG_PTR)BaseAddress >> PAGE_SHIFT;
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EndVpn = ((ULONG_PTR)BaseAddress + RegionSize - 1) >> PAGE_SHIFT;
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/* Build the Vad */
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buildVad:
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Vad = ExAllocatePoolWithTag(NonPagedPool, sizeof(MMVAD), TAG_MVAD);
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if(!Vad)
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{
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Status = STATUS_INSUFFICIENT_RESOURCES;
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goto cleanup;
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}
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RtlZeroMemory(Vad, sizeof(MMVAD));
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/* Set min/max */
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Vad->StartingVpn = StartVpn;
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Vad->EndingVpn = EndVpn;
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/* Set protection */
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Vad->u.VadFlags.Protection = ProtectionMask;
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/* Should it be already marked as committed ? */
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if(AllocationType & MEM_COMMIT)
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Vad->u.VadFlags.MemCommit = 1;
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if(AllocationType & MEM_PHYSICAL)
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{
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UNIMPLEMENTED;
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Vad->u.VadFlags.VadType = VadAwe;
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}
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/* Add it */
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MiLockProcessWorkingSet(Process, PsGetCurrentThread());
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MiInsertVad(Vad, Process);
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MiUnlockProcessWorkingSet(Process, PsGetCurrentThread());
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/* we're done */
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cleanup:
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KeReleaseGuardedMutex(&Process->AddressCreationLock);
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if (Attached) KeUnstackDetachProcess(&ApcState);
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if (ProcessHandle != NtCurrentProcess()) ObDereferenceObject(Process);
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*UBaseAddress = BaseAddress;
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*URegionSize = RegionSize;
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DPRINT("*UBaseAddress %x *URegionSize %x\n", BaseAddress, RegionSize);
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return Status;
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}
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#endif
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/* EOF */
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@ -528,6 +528,7 @@ MiProtectVirtualMemory(IN PEPROCESS Process,
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return Status;
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}
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#ifndef __USE_ARM3__
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/*
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* @implemented
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*/
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@ -900,6 +901,7 @@ NtAllocateVirtualMemory(IN HANDLE ProcessHandle,
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return(STATUS_SUCCESS);
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}
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#endif // __USE_ARM3__
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static VOID
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MmFreeVirtualMemoryPage(PVOID Context,
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