diff options
Diffstat (limited to 'src/Crypto/cpu.c')
| -rw-r--r-- | src/Crypto/cpu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/Crypto/cpu.c b/src/Crypto/cpu.c index c358088d..35fd36fe 100644 --- a/src/Crypto/cpu.c +++ b/src/Crypto/cpu.c @@ -247,71 +247,71 @@ static int TryAESNI () static int Detect_MS_HyperV_AES () { int hasAesNI = 0; // when Hyper-V is enabled on older versions of Windows Server (i.e. 2008 R2), the AES-NI capability // gets masked out for all applications, even running on the host. // We try to detect Hyper-V virtual CPU and perform a dummy AES-NI operation to check its real presence uint32 cpuid[4]; char HvProductName[13]; CpuId(0x40000000, cpuid); memcpy (HvProductName, &cpuid[1], 12); HvProductName[12] = 0; if (_stricmp(HvProductName, "Microsoft Hv") == 0) { #if defined (TC_WINDOWS_DRIVER) && !defined (_WIN64) KFLOATING_SAVE floatingPointState; if (NT_SUCCESS (KeSaveFloatingPointState (&floatingPointState))) { #endif hasAesNI = TryAESNI (); #if defined (TC_WINDOWS_DRIVER) && !defined (_WIN64) KeRestoreFloatingPointState (&floatingPointState); } #endif } return hasAesNI; } #endif void DetectX86Features() { - uint32 cpuid[4], cpuid1[4]; + uint32 cpuid[4] = {0}, cpuid1[4] = {0}; if (!CpuId(0, cpuid)) return; if (!CpuId(1, cpuid1)) return; g_hasMMX = (cpuid1[3] & (1 << 23)) != 0; if ((cpuid1[3] & (1 << 26)) != 0) g_hasSSE2 = TrySSE2(); g_hasAVX = g_hasSSE2 && (cpuid1[2] & (1 << 28)); g_hasSSE42 = g_hasSSE2 && (cpuid1[2] & (1 << 20)); g_hasSSE41 = g_hasSSE2 && (cpuid1[2] & (1 << 19)); g_hasSSSE3 = g_hasSSE2 && (cpuid1[2] & (1<<9)); g_hasAESNI = g_hasSSE2 && (cpuid1[2] & (1<<25)); g_hasCLMUL = g_hasSSE2 && (cpuid1[2] & (1<<1)); #if !defined (_UEFI) && ((defined(__AES__) && defined(__PCLMUL__)) || defined(__INTEL_COMPILER) || CRYPTOPP_BOOL_AESNI_INTRINSICS_AVAILABLE) // Hypervisor = bit 31 of ECX of CPUID leaf 0x1 // reference: http://artemonsecurity.com/vmde.pdf if (!g_hasAESNI && (cpuid1[2] & (1<<31))) { g_hasAESNI = Detect_MS_HyperV_AES (); } #endif if ((cpuid1[3] & (1 << 25)) != 0) g_hasISSE = 1; else { uint32 cpuid2[4]; CpuId(0x080000000, cpuid2); if (cpuid2[0] >= 0x080000001) { CpuId(0x080000001, cpuid2); g_hasISSE = (cpuid2[3] & (1 << 22)) != 0; } |