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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.

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This commit is contained in:
Mounir IDRASSI
2017-07-04 02:05:11 +02:00
parent c2f6190627
commit 89efcdb8cd
8 changed files with 201 additions and 39 deletions
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15
src/Driver/DumpFilter.c
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@@ -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);