diff options
Diffstat (limited to 'Core/MdePkg/Library/BaseLib/X86RdRand.c')
-rw-r--r-- | Core/MdePkg/Library/BaseLib/X86RdRand.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/BaseLib/X86RdRand.c b/Core/MdePkg/Library/BaseLib/X86RdRand.c new file mode 100644 index 0000000000..36d5457b48 --- /dev/null +++ b/Core/MdePkg/Library/BaseLib/X86RdRand.c @@ -0,0 +1,79 @@ +/** @file
+ IA-32/x64 AsmRdRandxx()
+ Generates random number through CPU RdRand instruction.
+
+ Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php.
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "BaseLibInternals.h"
+
+/**
+ Generates a 16-bit random number through RDRAND instruction.
+
+ if Rand is NULL, then ASSERT().
+
+ @param[out] Rand Buffer pointer to store the random result.
+
+ @retval TRUE RDRAND call was successful.
+ @retval FALSE Failed attempts to call RDRAND.
+
+ **/
+BOOLEAN
+EFIAPI
+AsmRdRand16 (
+ OUT UINT16 *Rand
+ )
+{
+ ASSERT (Rand != NULL);
+ return InternalX86RdRand16 (Rand);
+}
+
+/**
+ Generates a 32-bit random number through RDRAND instruction.
+
+ if Rand is NULL, then ASSERT().
+
+ @param[out] Rand Buffer pointer to store the random result.
+
+ @retval TRUE RDRAND call was successful.
+ @retval FALSE Failed attempts to call RDRAND.
+
+**/
+BOOLEAN
+EFIAPI
+AsmRdRand32 (
+ OUT UINT32 *Rand
+ )
+{
+ ASSERT (Rand != NULL);
+ return InternalX86RdRand32 (Rand);
+}
+
+/**
+ Generates a 64-bit random number through RDRAND instruction.
+
+ if Rand is NULL, then ASSERT().
+
+ @param[out] Rand Buffer pointer to store the random result.
+
+ @retval TRUE RDRAND call was successful.
+ @retval FALSE Failed attempts to call RDRAND.
+
+**/
+BOOLEAN
+EFIAPI
+AsmRdRand64 (
+ OUT UINT64 *Rand
+ )
+{
+ ASSERT (Rand != NULL);
+ return InternalX86RdRand64 (Rand);
+}
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