https://git.reactos.org/?p=reactos.git;a=commitdiff;h=48d1bd2c883fc3ebf143ae905eeab07c259889b5
commit 48d1bd2c883fc3ebf143ae905eeab07c259889b5 Author: Timo Kreuzer <[email protected]> AuthorDate: Sat Mar 7 19:35:15 2020 +0100 Commit: Timo Kreuzer <[email protected]> CommitDate: Sun Nov 1 09:32:27 2020 +0100 [NTOS:MM:X64] On x64 allocate a VAD for the shared user page --- ntoskrnl/mm/ARM3/procsup.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) diff --git a/ntoskrnl/mm/ARM3/procsup.c b/ntoskrnl/mm/ARM3/procsup.c index 6407b7896d0..809f36e824d 100644 --- a/ntoskrnl/mm/ARM3/procsup.c +++ b/ntoskrnl/mm/ARM3/procsup.c @@ -840,6 +840,62 @@ MmCreateTeb(IN PEPROCESS Process, return Status; } +#ifdef _M_AMD64 +static +NTSTATUS +MiInsertSharedUserPageVad(VOID) +{ + PMMVAD_LONG Vad; + ULONG_PTR BaseAddress; + NTSTATUS Status; + + /* Allocate a VAD */ + Vad = ExAllocatePoolWithTag(NonPagedPool, sizeof(MMVAD_LONG), 'ldaV'); + if (Vad == NULL) + { + DPRINT1("Failed to allocate VAD for shared user page\n"); + return STATUS_INSUFFICIENT_RESOURCES; + } + + /* Setup the primary flags with the size, and make it private, RO */ + Vad->u.LongFlags = 0; + Vad->u.VadFlags.CommitCharge = 0; + Vad->u.VadFlags.NoChange = TRUE; + Vad->u.VadFlags.VadType = VadNone; + Vad->u.VadFlags.MemCommit = FALSE; + Vad->u.VadFlags.Protection = MM_READONLY; + Vad->u.VadFlags.PrivateMemory = TRUE; + Vad->u1.Parent = NULL; + + /* Setup the secondary flags to make it a secured, readonly, long VAD */ + Vad->u2.LongFlags2 = 0; + Vad->u2.VadFlags2.OneSecured = TRUE; + Vad->u2.VadFlags2.LongVad = TRUE; + Vad->u2.VadFlags2.ReadOnly = FALSE; + + Vad->ControlArea = NULL; // For Memory-Area hack + Vad->FirstPrototypePte = NULL; + + /* Insert it into the process VAD table */ + BaseAddress = MM_SHARED_USER_DATA_VA; + Status = MiInsertVadEx((PMMVAD)Vad, + &BaseAddress, + PAGE_SIZE, + (ULONG_PTR)MM_HIGHEST_VAD_ADDRESS, + PAGE_SIZE, + MEM_TOP_DOWN); + if (!NT_SUCCESS(Status)) + { + DPRINT1("Failed to insert shared user VAD\n"); + ExFreePoolWithTag(Vad, 'ldaV'); + return Status; + } + + /* Success */ + return STATUS_SUCCESS; +} +#endif + VOID NTAPI MiInitializeWorkingSetList(IN PEPROCESS CurrentProcess) @@ -957,6 +1013,16 @@ MmInitializeProcessAddressSpace(IN PEPROCESS Process, /* Release PFN lock */ MiReleasePfnLock(OldIrql); +#ifdef _M_AMD64 + /* On x64 we need a VAD for the shared user page */ + Status = MiInsertSharedUserPageVad(); + if (!NT_SUCCESS(Status)) + { + DPRINT1("MiCreateSharedUserPageVad() failed: 0x%lx\n", Status); + return Status; + } +#endif + /* Check if there's a Section Object */ if (SectionObject) {
