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Windows: correctly handle SEH exceptions during self-tests in order to disable CPU extended features in such case.

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This commit is contained in:
Mounir IDRASSI
2017-07-04 11:19:53 +02:00
parent 0358eb6c71
commit 88cc8a00f4
6 changed files with 91 additions and 54 deletions
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14
src/Driver/DumpFilter.c
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@@ -66,18 +66,8 @@ NTSTATUS DumpFilterEntry (PFILTER_EXTENSION filterExtension, PFILTER_INITIALIZAT
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;
// disable also CPU extended features used in optimizations
DisableCPUExtendedFeatures ();
}
#endif

11
src/Driver/Ntdriver.c
View File

@@ -153,7 +153,16 @@ NTSTATUS DriverEntry (PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath)
if (startKeyValue->Type == REG_DWORD && *((uint32 *) startKeyValue->Data) == SERVICE_BOOT_START)
{
if (!SelfTestsPassed)
TC_BUG_CHECK (STATUS_INVALID_PARAMETER);
{
// in case of system encryption, if self-tests fail, disable all extended CPU
// features and try again in order to workaround faulty configurations
DisableCPUExtendedFeatures ();
SelfTestsPassed = AutoTestAlgorithms();
// BUG CHECK if the self-tests still fail
if (!SelfTestsPassed)
TC_BUG_CHECK (STATUS_INVALID_PARAMETER);
}
LoadBootArguments();
VolumeClassFilterRegistered = IsVolumeClassFilterRegistered();