fix a few bugs in scheduling and synchronization, separate OVMF_VARS for debug

code/kernel/ke_semaphore.c

@@ -25,40 +25,40 @@ KSTATUS KeWaitSemaphore(SEMAPHORE* sem) {
     THREAD* self = KeCurrentThread();
 
     for (;;) {
-        KeAcquireSpinlock(&sem->Lock);
+        uintptr_t flags = KeAcquireSpinlock(&sem->Lock);
         if (sem->Count > 0) {
             sem->Count--;
-            KeReleaseSpinlock(&sem->Lock);
+            KeReleaseSpinlock(&sem->Lock, flags);
             return STATUS_SUCCESS;
         }
         ListInsertTail(&sem->WaitList, &self->SchedulerLink);
-        KeReleaseSpinlock(&sem->Lock);
+        KeReleaseSpinlock(&sem->Lock, flags);
         KeBlockThread(self, &sem->Header);
     }
 }
 
 KSTATUS KeTrySemaphore(SEMAPHORE* sem) {
     if (!sem) return STATUS_INVALID_PARAMETER;
-    KeAcquireSpinlock(&sem->Lock);
+    uintptr_t flags = KeAcquireSpinlock(&sem->Lock);
     if (sem->Count > 0) {
         sem->Count--;
-        KeReleaseSpinlock(&sem->Lock);
+        KeReleaseSpinlock(&sem->Lock, flags);
         return STATUS_SUCCESS;
     }
-    KeReleaseSpinlock(&sem->Lock);
+    KeReleaseSpinlock(&sem->Lock, flags);
     return STATUS_FAILURE;
 }
 
 void KeSignalSemaphore(SEMAPHORE* sem) {
     if (!sem) return;
-    KeAcquireSpinlock(&sem->Lock);
+    uintptr_t flags = KeAcquireSpinlock(&sem->Lock);
     if (!LIST_IS_EMPTY(&sem->WaitList)) {
         LIST_ENTRY* node = ListPopHead(&sem->WaitList);
         THREAD* waiter   = CONTAINING_RECORD(node, THREAD, SchedulerLink);
-        KeReleaseSpinlock(&sem->Lock);
+        KeReleaseSpinlock(&sem->Lock, flags);
         KeUnblockThread(waiter);
         return;
     }
     if (sem->Count < sem->MaxCount) sem->Count++;
-    KeReleaseSpinlock(&sem->Lock);
+    KeReleaseSpinlock(&sem->Lock, flags);
 }