VeraCrypt
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-rw-r--r--src/Crypto/cpu.c462
1 files changed, 231 insertions, 231 deletions
diff --git a/src/Crypto/cpu.c b/src/Crypto/cpu.c
index 58a131af..3de87069 100644
--- a/src/Crypto/cpu.c
+++ b/src/Crypto/cpu.c
@@ -1,231 +1,231 @@
-/* cpu.c - written and placed in the public domain by Wei Dai */
-
-#include "cpu.h"
-#include "misc.h"
-
-#ifndef EXCEPTION_EXECUTE_HANDLER
-#define EXCEPTION_EXECUTE_HANDLER 1
-#endif
-
-#ifndef CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY
-#include <signal.h>
-#include <setjmp.h>
-#endif
-
-#if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE
-#include <emmintrin.h>
-#endif
-
-#ifdef CRYPTOPP_CPUID_AVAILABLE
-
-#if _MSC_VER >= 1400 && CRYPTOPP_BOOL_X64
-
-int CpuId(uint32 input, uint32 output[4])
-{
- __cpuid((int *)output, input);
- return 1;
-}
-
-#else
-
-#ifndef CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY
-
-#if defined(__cplusplus)
-extern "C" {
-#endif
-
-typedef void (*SigHandler)(int);
-
-static jmp_buf s_jmpNoCPUID;
-static void SigIllHandlerCPUID(int p)
-{
- longjmp(s_jmpNoCPUID, 1);
-}
-
-#if CRYPTOPP_BOOL_X64 == 0
-static jmp_buf s_jmpNoSSE2;
-static void SigIllHandlerSSE2(int p)
-{
- longjmp(s_jmpNoSSE2, 1);
-}
-#endif
-
-#if defined(__cplusplus)
-}
-#endif
-#endif
-
-int CpuId(uint32 input, uint32 output[4])
-{
-#ifdef CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY
- __try
- {
- __asm
- {
- mov eax, input
- mov ecx, 0
- cpuid
- mov edi, output
- mov [edi], eax
- mov [edi+4], ebx
- mov [edi+8], ecx
- mov [edi+12], edx
- }
- }
- __except (EXCEPTION_EXECUTE_HANDLER)
- {
- return 0;
- }
-
- // function 0 returns the highest basic function understood in EAX
- if(input == 0)
- return !!output[0]? 1 : 0;
-
- return 1;
-#else
- // longjmp and clobber warnings. Volatile is required.
- // http://github.com/weidai11/cryptopp/issues/24
- // http://stackoverflow.com/q/7721854
- volatile int result = 1;
-
- SigHandler oldHandler = signal(SIGILL, SigIllHandlerCPUID);
- if (oldHandler == SIG_ERR)
- result = 0;
-
- if (setjmp(s_jmpNoCPUID))
- result = 0;
- else
- {
- asm volatile
- (
- // save ebx in case -fPIC is being used
- // TODO: this might need an early clobber on EDI.
-#if CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X64
- "pushq %%rbx; cpuid; mov %%ebx, %%edi; popq %%rbx"
-#else
- "push %%ebx; cpuid; mov %%ebx, %%edi; pop %%ebx"
-#endif
- : "=a" (output[0]), "=D" (output[1]), "=c" (output[2]), "=d" (output[3])
- : "a" (input), "c" (0)
- );
- }
-
- signal(SIGILL, oldHandler);
- return result;
-#endif
-}
-
-#endif
-
-static int TrySSE2()
-{
-#if CRYPTOPP_BOOL_X64
- return 1;
-#elif defined(CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY)
- __try
- {
-#if CRYPTOPP_BOOL_SSE2_ASM_AVAILABLE
- AS2(por xmm0, xmm0) // executing SSE2 instruction
-#elif CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE
- __m128i x = _mm_setzero_si128();
- return _mm_cvtsi128_si32(x) == 0 ? 1 : 0;
-#endif
- }
- __except (EXCEPTION_EXECUTE_HANDLER)
- {
- return 0;
- }
- return 1;
-#else
- // longjmp and clobber warnings. Volatile is required.
- // http://github.com/weidai11/cryptopp/issues/24
- // http://stackoverflow.com/q/7721854
- volatile int result = 1;
-
- SigHandler oldHandler = signal(SIGILL, SigIllHandlerSSE2);
- if (oldHandler == SIG_ERR)
- return 0;
-
- if (setjmp(s_jmpNoSSE2))
- result = 1;
- else
- {
-#if CRYPTOPP_BOOL_SSE2_ASM_AVAILABLE
- __asm __volatile ("por %xmm0, %xmm0");
-#elif CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE
- __m128i x = _mm_setzero_si128();
- result = _mm_cvtsi128_si32(x) == 0? 1 : 0;
-#endif
- }
-
- signal(SIGILL, oldHandler);
- return result;
-#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;
-uint32 g_cacheLineSize = CRYPTOPP_L1_CACHE_LINE_SIZE;
-
-VC_INLINE int IsIntel(const uint32 output[4])
-{
- // This is the "GenuineIntel" string
- return (output[1] /*EBX*/ == 0x756e6547) &&
- (output[2] /*ECX*/ == 0x6c65746e) &&
- (output[3] /*EDX*/ == 0x49656e69);
-}
-
-VC_INLINE int IsAMD(const uint32 output[4])
-{
- // This is the "AuthenticAMD" string
- return (output[1] /*EBX*/ == 0x68747541) &&
- (output[2] /*ECX*/ == 0x69746E65) &&
- (output[3] /*EDX*/ == 0x444D4163);
-}
-
-void DetectX86Features()
-{
- uint32 cpuid[4], cpuid1[4];
- 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_hasSSSE3 = g_hasSSE2 && (cpuid1[2] & (1<<9));
- g_hasAESNI = g_hasSSE2 && (cpuid1[2] & (1<<25));
- g_hasCLMUL = g_hasSSE2 && (cpuid1[2] & (1<<1));
-
- 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;
- }
- }
-
- if (IsIntel(cpuid))
- {
- g_isP4 = ((cpuid1[0] >> 8) & 0xf) == 0xf;
- g_cacheLineSize = 8 * GETBYTE(cpuid1[1], 1);
- }
- else if (IsAMD(cpuid))
- {
- CpuId(0x80000005, cpuid);
- g_cacheLineSize = GETBYTE(cpuid[2], 0);
- }
-
- if (!g_cacheLineSize)
- g_cacheLineSize = CRYPTOPP_L1_CACHE_LINE_SIZE;
-
- *((volatile int*)&g_x86DetectionDone) = 1;
-}
-
-#endif
+/* cpu.c - written and placed in the public domain by Wei Dai */
+
+#include "cpu.h"
+#include "misc.h"
+
+#ifndef EXCEPTION_EXECUTE_HANDLER
+#define EXCEPTION_EXECUTE_HANDLER 1
+#endif
+
+#ifndef CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY
+#include <signal.h>
+#include <setjmp.h>
+#endif
+
+#if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE
+#include <emmintrin.h>
+#endif
+
+#ifdef CRYPTOPP_CPUID_AVAILABLE
+
+#if _MSC_VER >= 1400 && CRYPTOPP_BOOL_X64
+
+int CpuId(uint32 input, uint32 output[4])
+{
+ __cpuid((int *)output, input);
+ return 1;
+}
+
+#else
+
+#ifndef CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+typedef void (*SigHandler)(int);
+
+static jmp_buf s_jmpNoCPUID;
+static void SigIllHandlerCPUID(int p)
+{
+ longjmp(s_jmpNoCPUID, 1);
+}
+
+#if CRYPTOPP_BOOL_X64 == 0
+static jmp_buf s_jmpNoSSE2;
+static void SigIllHandlerSSE2(int p)
+{
+ longjmp(s_jmpNoSSE2, 1);
+}
+#endif
+
+#if defined(__cplusplus)
+}
+#endif
+#endif
+
+int CpuId(uint32 input, uint32 output[4])
+{
+#ifdef CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY
+ __try
+ {
+ __asm
+ {
+ mov eax, input
+ mov ecx, 0
+ cpuid
+ mov edi, output
+ mov [edi], eax
+ mov [edi+4], ebx
+ mov [edi+8], ecx
+ mov [edi+12], edx
+ }
+ }
+ __except (EXCEPTION_EXECUTE_HANDLER)
+ {
+ return 0;
+ }
+
+ // function 0 returns the highest basic function understood in EAX
+ if(input == 0)
+ return !!output[0]? 1 : 0;
+
+ return 1;
+#else
+ // longjmp and clobber warnings. Volatile is required.
+ // http://github.com/weidai11/cryptopp/issues/24
+ // http://stackoverflow.com/q/7721854
+ volatile int result = 1;
+
+ SigHandler oldHandler = signal(SIGILL, SigIllHandlerCPUID);
+ if (oldHandler == SIG_ERR)
+ result = 0;
+
+ if (setjmp(s_jmpNoCPUID))
+ result = 0;
+ else
+ {
+ asm volatile
+ (
+ // save ebx in case -fPIC is being used
+ // TODO: this might need an early clobber on EDI.
+#if CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X64
+ "pushq %%rbx; cpuid; mov %%ebx, %%edi; popq %%rbx"
+#else
+ "push %%ebx; cpuid; mov %%ebx, %%edi; pop %%ebx"
+#endif
+ : "=a" (output[0]), "=D" (output[1]), "=c" (output[2]), "=d" (output[3])
+ : "a" (input), "c" (0)
+ );
+ }
+
+ signal(SIGILL, oldHandler);
+ return result;
+#endif
+}
+
+#endif
+
+static int TrySSE2()
+{
+#if CRYPTOPP_BOOL_X64
+ return 1;
+#elif defined(CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY)
+ __try
+ {
+#if CRYPTOPP_BOOL_SSE2_ASM_AVAILABLE
+ AS2(por xmm0, xmm0) // executing SSE2 instruction
+#elif CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE
+ __m128i x = _mm_setzero_si128();
+ return _mm_cvtsi128_si32(x) == 0 ? 1 : 0;
+#endif
+ }
+ __except (EXCEPTION_EXECUTE_HANDLER)
+ {
+ return 0;
+ }
+ return 1;
+#else
+ // longjmp and clobber warnings. Volatile is required.
+ // http://github.com/weidai11/cryptopp/issues/24
+ // http://stackoverflow.com/q/7721854
+ volatile int result = 1;
+
+ SigHandler oldHandler = signal(SIGILL, SigIllHandlerSSE2);
+ if (oldHandler == SIG_ERR)
+ return 0;
+
+ if (setjmp(s_jmpNoSSE2))
+ result = 1;
+ else
+ {
+#if CRYPTOPP_BOOL_SSE2_ASM_AVAILABLE
+ __asm __volatile ("por %xmm0, %xmm0");
+#elif CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE
+ __m128i x = _mm_setzero_si128();
+ result = _mm_cvtsi128_si32(x) == 0? 1 : 0;
+#endif
+ }
+
+ signal(SIGILL, oldHandler);
+ return result;
+#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;
+uint32 g_cacheLineSize = CRYPTOPP_L1_CACHE_LINE_SIZE;
+
+VC_INLINE int IsIntel(const uint32 output[4])
+{
+ // This is the "GenuineIntel" string
+ return (output[1] /*EBX*/ == 0x756e6547) &&
+ (output[2] /*ECX*/ == 0x6c65746e) &&
+ (output[3] /*EDX*/ == 0x49656e69);
+}
+
+VC_INLINE int IsAMD(const uint32 output[4])
+{
+ // This is the "AuthenticAMD" string
+ return (output[1] /*EBX*/ == 0x68747541) &&
+ (output[2] /*ECX*/ == 0x69746E65) &&
+ (output[3] /*EDX*/ == 0x444D4163);
+}
+
+void DetectX86Features()
+{
+ uint32 cpuid[4], cpuid1[4];
+ 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_hasSSSE3 = g_hasSSE2 && (cpuid1[2] & (1<<9));
+ g_hasAESNI = g_hasSSE2 && (cpuid1[2] & (1<<25));
+ g_hasCLMUL = g_hasSSE2 && (cpuid1[2] & (1<<1));
+
+ 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;
+ }
+ }
+
+ if (IsIntel(cpuid))
+ {
+ g_isP4 = ((cpuid1[0] >> 8) & 0xf) == 0xf;
+ g_cacheLineSize = 8 * GETBYTE(cpuid1[1], 1);
+ }
+ else if (IsAMD(cpuid))
+ {
+ CpuId(0x80000005, cpuid);
+ g_cacheLineSize = GETBYTE(cpuid[2], 0);
+ }
+
+ if (!g_cacheLineSize)
+ g_cacheLineSize = CRYPTOPP_L1_CACHE_LINE_SIZE;
+
+ *((volatile int*)&g_x86DetectionDone) = 1;
+}
+
+#endif