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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 committed 2017-07-04 12:28:17 +02:00
1 parent 0358eb6c71
commit 88cc8a00f4
6 files changed
+91 -54
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src/Crypto/cpu.c
+22 -4
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@@ -200,10 +200,10 @@ static uint64 xgetbv()
#endif
}
int g_x86DetectionDone = 0;
int g_hasISSE = 0, g_hasSSE2 = 0, g_hasSSSE3 = 0, g_hasMMX = 0, g_hasAESNI = 0, g_hasCLMUL = 0, g_isP4 = 0;
int g_hasAVX = 0, g_hasAVX2 = 0, g_hasBMI2 = 0, g_hasSSE42 = 0, g_hasSSE41 = 0, g_isIntel = 0, g_isAMD = 0;
uint32 g_cacheLineSize = CRYPTOPP_L1_CACHE_LINE_SIZE;
volatile int g_x86DetectionDone = 0;
volatile int g_hasISSE = 0, g_hasSSE2 = 0, g_hasSSSE3 = 0, g_hasMMX = 0, g_hasAESNI = 0, g_hasCLMUL = 0, g_isP4 = 0;
volatile int g_hasAVX = 0, g_hasAVX2 = 0, g_hasBMI2 = 0, g_hasSSE42 = 0, g_hasSSE41 = 0, g_isIntel = 0, g_isAMD = 0;
volatile uint32 g_cacheLineSize = CRYPTOPP_L1_CACHE_LINE_SIZE;
VC_INLINE int IsIntel(const uint32 output[4])
{
@@ -381,5 +381,23 @@ int is_aes_hw_cpu_supported ()
return bHasAESNI;
}
void DisableCPUExtendedFeatures ()
{
g_hasSSE2 = 0;
g_hasISSE = 0;
g_hasMMX = 0;
g_hasSSE2 = 0;
g_hasISSE = 0;
g_hasMMX = 0;
g_hasAVX = 0;
g_hasAVX2 = 0;
g_hasBMI2 = 0;
g_hasSSE42 = 0;
g_hasSSE41 = 0;
g_hasSSSE3 = 0;
g_hasAESNI = 0;
g_hasCLMUL = 0;
}
#endif