[PATCH v3 11/11] ntoskrnl.exe: Implement Ex(Acquire/Release)FastMutex.
Derek Lesho
dereklesho52 at gmail.com
Thu Apr 11 13:27:05 CDT 2019
Signed-off-by: Derek Lesho <dereklesho52 at Gmail.com>
---
v3: Removed IRQL raising/restoring functionality, since it needs
a better implementation / more tests. Also marked it as x86_64 only
as ZF recommended.
dlls/ntoskrnl.exe/ntoskrnl.exe.spec | 2 ++
dlls/ntoskrnl.exe/sync.c | 21 +++++++++++++++++++++
2 files changed, 23 insertions(+)
diff --git a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
index 399258cdfd..5ec5e492b2 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
+++ b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
@@ -1,4 +1,5 @@
@ stdcall -fastcall ExAcquireFastMutexUnsafe(ptr)
+@ stdcall -arch=x86_64 ExAcquireFastMutex(ptr)
@ stub ExAcquireRundownProtection
@ stub ExAcquireRundownProtectionEx
@ stub ExInitializeRundownProtection
@@ -9,6 +10,7 @@
@ stdcall -fastcall -arch=i386 ExInterlockedPushEntrySList (ptr ptr ptr) NTOSKRNL_ExInterlockedPushEntrySList
@ stub ExReInitializeRundownProtection
@ stdcall -fastcall ExReleaseFastMutexUnsafe(ptr)
+@ stdcall -arch=x86_64 ExReleaseFastMutex(ptr)
@ stdcall ExReleaseResourceLite(ptr)
@ stub ExReleaseRundownProtection
@ stub ExReleaseRundownProtectionEx
diff --git a/dlls/ntoskrnl.exe/sync.c b/dlls/ntoskrnl.exe/sync.c
index bb2d318e56..20fefce39f 100644
--- a/dlls/ntoskrnl.exe/sync.c
+++ b/dlls/ntoskrnl.exe/sync.c
@@ -689,3 +689,24 @@ void WINAPI ExReleaseFastMutexUnsafe( FAST_MUTEX *mutex )
if (InterlockedIncrement(&mutex->Count) < 1)
KeSetEvent( &mutex->Event, IO_NO_INCREMENT, FALSE );
}
+
+
+/*********************************************************************
+ * ExAcquireFastMutex (NTOSKRNL.@)
+ */
+void WINAPI ExAcquireFastMutex(PFAST_MUTEX mutex)
+{
+ /* TODO: The safe variant raises thread to APC_LEVEL
+ and stores the previous IRQL in mutex->OldIrql */
+ ExAcquireFastMutexUnsafe( mutex );
+}
+
+
+ /*********************************************************************
+ * ExReleaseFastMutex (NTOSKRNL.@)
+ */
+void WINAPI ExReleaseFastMutex(PFAST_MUTEX mutex)
+{
+ ExReleaseFastMutexUnsafe( mutex );
+ /* TODO: the safe variant restores the IRQL to mutex->OldIrql */
+}
--
2.20.1
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