From 89efcdb8cd95ea798187fe4062a73fa5d2fca456 Mon Sep 17 00:00:00 2001
From: Mounir IDRASSI <mounir.idrassi@idrix.fr>
Date: Tue, 4 Jul 2017 02:05:11 +0200
Subject: Windows Driver: correctly save and restore extended processor state
 when performing AVX operations on Windows 7 and later. Enhance readability of
 code handling save/restore of floating point state.

---
 src/Driver/DumpFilter.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'src/Driver/DumpFilter.c')

diff --git a/src/Driver/DumpFilter.c b/src/Driver/DumpFilter.c
index 1b57bdbf..18feca06 100644
--- a/src/Driver/DumpFilter.c
+++ b/src/Driver/DumpFilter.c
@@ -14,6 +14,7 @@
 #include "DriveFilter.h"
 #include "Ntdriver.h"
 #include "Tests.h"
+#include "cpu.h"
 
 static DriveFilterExtension *BootDriveFilterExtension = NULL;
 static LARGE_INTEGER DumpPartitionOffset;
@@ -63,7 +64,21 @@ NTSTATUS DumpFilterEntry (PFILTER_EXTENSION filterExtension, PFILTER_INITIALIZAT
 	// KeSaveFloatingPointState() may generate a bug check during crash dump
 #if !defined (_WIN64)
 	if (filterExtension->DumpType == DumpTypeCrashdump)
+	{
 		dumpConfig.HwEncryptionEnabled = FALSE;
+		// disable also SSE optimizations
+		HasMMX() = 0;
+		HasISSE() = 0;
+		HasSSE2() = 0;
+		HasSSSE3() = 0;
+		HasSSE41() = 0;
+		HasSSE42() = 0;
+		HasAESNI() = 0;
+		HasCLMUL() = 0;
+		HasSAVX() = 0;
+		HasSAVX2() = 0;
+		HasSBMI2() = 0;
+	}
 #endif
 
 	EnableHwEncryption (dumpConfig.HwEncryptionEnabled);
-- 
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