Signed-off-by: Derek Lesho <dereklesho52@Gmail.com>
---
 dlls/ntoskrnl.exe/ntoskrnl.c         | 16 ++++++++++++++--
 dlls/ntoskrnl.exe/ntoskrnl.exe.spec  |  2 +-
 dlls/ntoskrnl.exe/ntoskrnl_private.h |  1 +
 3 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/dlls/ntoskrnl.exe/ntoskrnl.c b/dlls/ntoskrnl.exe/ntoskrnl.c
index 770bdfd4fa..ec05125f27 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.c
+++ b/dlls/ntoskrnl.exe/ntoskrnl.c
@@ -2497,6 +2497,8 @@ static void *create_thread_object( HANDLE handle )
     if (!NtQueryInformationThread( handle, ThreadBasicInformation, &info, sizeof(info), NULL ))
         thread->id = info.ClientId;

+    thread->critical_region = FALSE;
+
     return thread;
 }

@@ -3431,7 +3433,8 @@ void WINAPI ExReleaseResourceForThreadLite( PERESOURCE resource, ERESOURCE_THREA
  */
 void WINAPI KeEnterCriticalRegion(void)
 {
-    FIXME(": stub\n");
+    /* FIXME: actually disable certain APCs */
+    KeGetCurrentThread()->critical_region = TRUE;
 }

 /***********************************************************************
@@ -3439,7 +3442,8 @@ void WINAPI KeEnterCriticalRegion(void)
  */
 void WINAPI KeLeaveCriticalRegion(void)
 {
-    FIXME(": stub\n");
+    /* FIXME: actually re-enable certain APCs */
+    KeGetCurrentThread()->critical_region = FALSE;
 }

 /***********************************************************************
@@ -4379,3 +4383,11 @@ ULONG WINAPI ExSetTimerResolution(ULONG time, BOOLEAN set_resolution)
     FIXME("stub: %u %d\n", time, set_resolution);
     return KeQueryTimeIncrement();
 }
+
+/*********************************************************************
+ *           KeAreApcsDisabled    (NTOSKRNL.@)
+ */
+BOOLEAN WINAPI KeAreApcsDisabled(void)
+{
+    return KeGetCurrentThread()->critical_region;
+}
diff --git a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
index 601506246e..08de49e760 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
+++ b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
@@ -520,7 +520,7 @@
 @ stdcall KeAcquireSpinLockAtDpcLevel(ptr)
 @ stdcall -arch=arm,arm64,x86_64 KeAcquireSpinLockRaiseToDpc(ptr)
 @ stub KeAddSystemServiceTable
-@ stub KeAreApcsDisabled
+@ stdcall KeAreApcsDisabled()
 @ stub KeAttachProcess
 @ stub KeBugCheck
 @ stub KeBugCheckEx
diff --git a/dlls/ntoskrnl.exe/ntoskrnl_private.h b/dlls/ntoskrnl.exe/ntoskrnl_private.h
index d44ffd5d3c..67e5068c9b 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl_private.h
+++ b/dlls/ntoskrnl.exe/ntoskrnl_private.h
@@ -32,6 +32,7 @@ struct _KTHREAD
 {
     DISPATCHER_HEADER header;
     CLIENT_ID id;
+    BOOLEAN critical_region;
     void *unused[0x100];
 };

--
2.20.1