NMI Support Patch 13:

[NMIDEBUG]: Add new NMI Debug driver. It registers an NMI callback on startup. The callback does nothing useful at the moment, but you can enhance it to add all sorts of debugging information that would otherwise be unavailable in situations such as an interrupt storm, IRQL hang, etc. When you send an NMI, such as by using QEMU, you should see the driver print a string.

svn path=/trunk/; revision=44878

reactos/drivers/base/directory.rbuild

@@ -20,4 +20,7 @@
 <directory name="null">
 	<xi:include href="null/null.rbuild" />
 </directory>
+<directory name="nmidebug">
+	<xi:include href="nmidebug/nmidebug.rbuild" />
+</directory>
 </group>

reactos/drivers/base/nmidebug/nmidebug.c

@@ -0,0 +1,49 @@
+/*
+ * PROJECT:         ReactOS NMI Debug Driver
+ * LICENSE:         BSD - See COPYING.ARM in the top level directory
+ * FILE:            drivers/base/nmidebug/nmidebug.c
+ * PURPOSE:         Driver Code
+ * PROGRAMMERS:     ReactOS Portable Systems Group
+ */
+
+/* INCLUDES *******************************************************************/
+
+#include <ntddk.h>
+
+/* FUNCTIONS ******************************************************************/
+
+BOOLEAN
+NTAPI
+NmiDbgCallback(IN PVOID Context,
+               IN BOOLEAN Handled)
+{
+    //
+    // Let the user know we are alive
+    //         
+    DbgPrint("NMI Callback entered! Letting the system crash...\n");
+
+    //
+    // Do not handle the NMI
+    //
+    return FALSE;
+}
+     
+NTSTATUS
+NTAPI
+DriverEntry(IN PDRIVER_OBJECT DriverObject,
+            IN PUNICODE_STRING RegistryPath)
+{
+    PAGED_CODE();
+
+    //
+    // Register NMI callback
+    //
+    KeRegisterNmiCallback(&NmiDbgCallback, NULL);
+
+    //
+    // Return success
+    //
+    return STATUS_SUCCESS;
+}
+
+/* EOF */

reactos/drivers/base/nmidebug/nmidebug.rbuild

@@ -0,0 +1,9 @@
+<?xml version="1.0"?>
+<!DOCTYPE module SYSTEM "../../../tools/rbuild/project.dtd">
+<module name="nmidebug" type="kernelmodedriver" installbase="system32/drivers" installname="nmidebug.sys">
+	<include base="null">.</include>
+	<library>ntoskrnl</library>
+	<library>hal</library>
+	<file>nmidebug.c</file>
+	<file>nmidebug.rc</file>
+</module>

reactos/drivers/base/nmidebug/nmidebug.rc

@@ -0,0 +1,11 @@
+#include <winver.h>
+#include <ntverp.h>
+
+#define	VER_FILETYPE	            VFT_DRV
+#define	VER_FILESUBTYPE	            VFT2_DRV_SYSTEM
+#define VER_FILEDESCRIPTION_STR     "NMI debug driver"
+#define VER_INTERNALNAME_STR        "NMIDEBUG.SYS"
+#define VER_ORIGINALFILENAME_STR    "NMIDEBUG.SYS"
+#define VER_LANGNEUTRAL
+
+#include "common.ver"