From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 30CFF81D65 for ; Fri, 4 Nov 2016 01:02:59 -0700 (PDT) Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga103.fm.intel.com with ESMTP; 04 Nov 2016 01:03:00 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.31,442,1473145200"; d="scan'208";a="27688141" Received: from shwde6388.ccr.corp.intel.com ([10.239.9.121]) by orsmga004.jf.intel.com with ESMTP; 04 Nov 2016 01:02:59 -0700 From: Qin Long To: edk2-devel@lists.01.org, liming.gao@intel.com Date: Fri, 4 Nov 2016 16:02:56 +0800 Message-Id: <20161104080256.10728-1-qin.long@intel.com> X-Mailer: git-send-email 2.10.1.windows.1 Subject: [Patch] MdePkg/BaseLib: Add one wrapper on RdRand access for parameter check. X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 04 Nov 2016 08:02:59 -0000 Add one wrapper implementation over assembly RdRand access to check possible NULL parameter, for better alignment with comment description. Cc: Liming Gao Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Qin Long --- MdePkg/Library/BaseLib/BaseLib.inf | 2 + MdePkg/Library/BaseLib/BaseLibInternals.h | 48 ++++++++++++++++++- MdePkg/Library/BaseLib/Ia32/RdRand.S | 20 ++++---- MdePkg/Library/BaseLib/Ia32/RdRand.asm | 20 ++++---- MdePkg/Library/BaseLib/Ia32/RdRand.nasm | 20 ++++---- MdePkg/Library/BaseLib/X64/RdRand.S | 20 ++++---- MdePkg/Library/BaseLib/X64/RdRand.asm | 20 ++++---- MdePkg/Library/BaseLib/X64/RdRand.nasm | 20 ++++---- MdePkg/Library/BaseLib/X86RdRand.c | 79 +++++++++++++++++++++++++++++++ 9 files changed, 188 insertions(+), 61 deletions(-) create mode 100644 MdePkg/Library/BaseLib/X86RdRand.c diff --git a/MdePkg/Library/BaseLib/BaseLib.inf b/MdePkg/Library/BaseLib/BaseLib.inf index 1ffe870..320ac45 100644 --- a/MdePkg/Library/BaseLib/BaseLib.inf +++ b/MdePkg/Library/BaseLib/BaseLib.inf @@ -428,6 +428,7 @@ X86EnablePaging32.c X86DisablePaging64.c X86DisablePaging32.c + X86RdRand.c [Sources.X64] X64/Thunk16.nasm @@ -752,6 +753,7 @@ X86EnablePaging32.c X86DisablePaging64.c X86DisablePaging32.c + X86RdRand.c X64/GccInline.c | GCC X64/Thunk16.S | XCODE X64/SwitchStack.nasm| GCC diff --git a/MdePkg/Library/BaseLib/BaseLibInternals.h b/MdePkg/Library/BaseLib/BaseLibInternals.h index fe416a0..a8f712b 100644 --- a/MdePkg/Library/BaseLib/BaseLibInternals.h +++ b/MdePkg/Library/BaseLib/BaseLibInternals.h @@ -1,7 +1,7 @@ /** @file Declaration of internal functions in BaseLib. - Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.
+ Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.
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 @@ -728,6 +728,52 @@ InternalX86DisablePaging64 ( IN UINT32 NewStack ); +/** + Generates a 16-bit random number through RDRAND instruction. + + @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 +InternalX86RdRand16 ( + OUT UINT16 *Rand + ); + +/** + Generates a 32-bit random number through RDRAND instruction. + + @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 +InternalX86RdRand32 ( + OUT UINT32 *Rand + ); + +/** + Generates a 64-bit random number through RDRAND instruction. + + + @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 +InternalX86RdRand64 ( + OUT UINT64 *Rand + ); + #elif defined (MDE_CPU_IPF) // diff --git a/MdePkg/Library/BaseLib/Ia32/RdRand.S b/MdePkg/Library/BaseLib/Ia32/RdRand.S index 503f65a..d00075a 100644 --- a/MdePkg/Library/BaseLib/Ia32/RdRand.S +++ b/MdePkg/Library/BaseLib/Ia32/RdRand.S @@ -1,5 +1,5 @@ #------------------------------------------------------------------------------ ; -# Copyright (c) 2015, Intel Corporation. All rights reserved.
+# Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.
# 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 @@ -24,10 +24,10 @@ // Generates a 16 bit random number through RDRAND instruction. // Return TRUE if Rand generated successfully, or FALSE if not. // -// BOOLEAN EFIAPI AsmRdRand16 (UINT16 *Rand); +// BOOLEAN EFIAPI InternalX86RdRand16 (UINT16 *Rand); //------------------------------------------------------------------------------ -ASM_GLOBAL ASM_PFX(AsmRdRand16) -ASM_PFX(AsmRdRand16): +ASM_GLOBAL ASM_PFX(InternalX86RdRand16) +ASM_PFX(InternalX86RdRand16): .byte 0x0f, 0xc7, 0xf0 // rdrand r16: "0f c7 /6 ModRM:r/m(w)" jc rn16_ok // jmp if CF=1 xor %eax, %eax // reg=0 if CF=0 @@ -42,10 +42,10 @@ rn16_ok: // Generates a 32 bit random number through RDRAND instruction. // Return TRUE if Rand generated successfully, or FALSE if not. // -// BOOLEAN EFIAPI AsmRdRand32 (UINT32 *Rand); +// BOOLEAN EFIAPI InternalX86RdRand32 (UINT32 *Rand); //------------------------------------------------------------------------------ -ASM_GLOBAL ASM_PFX(AsmRdRand32) -ASM_PFX(AsmRdRand32): +ASM_GLOBAL ASM_PFX(InternalX86RdRand32) +ASM_PFX(InternalX86RdRand32): .byte 0x0f, 0xc7, 0xf0 // rdrand r32: "0f c7 /6 ModRM:r/m(w)" jc rn32_ok // jmp if CF=1 xor %eax, %eax // reg=0 if CF=0 @@ -60,10 +60,10 @@ rn32_ok: // Generates a 64 bit random number through RDRAND instruction. // Return TRUE if Rand generated successfully, or FALSE if not. // -// BOOLEAN EFIAPI AsmRdRand64 (UINT64 *Rand); +// BOOLEAN EFIAPI InternalX86RdRand64 (UINT64 *Rand); //------------------------------------------------------------------------------ -ASM_GLOBAL ASM_PFX(AsmRdRand64) -ASM_PFX(AsmRdRand64): +ASM_GLOBAL ASM_PFX(InternalX86RdRand64) +ASM_PFX(InternalX86RdRand64): .byte 0x0f, 0xc7, 0xf0 // rdrand r32: "0f c7 /6 ModRM:r/m(w)" jnc rn64_ret // jmp if CF=0 mov 0x4(%esp), %edx diff --git a/MdePkg/Library/BaseLib/Ia32/RdRand.asm b/MdePkg/Library/BaseLib/Ia32/RdRand.asm index 21349b0..cb4e811 100644 --- a/MdePkg/Library/BaseLib/Ia32/RdRand.asm +++ b/MdePkg/Library/BaseLib/Ia32/RdRand.asm @@ -1,6 +1,6 @@ ;------------------------------------------------------------------------------ ; -; Copyright (c) 2015, Intel Corporation. All rights reserved.
+; Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.
; 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 @@ -30,9 +30,9 @@ ; Generates a 16 bit random number through RDRAND instruction. ; Return TRUE if Rand generated successfully, or FALSE if not. ; -; BOOLEAN EFIAPI AsmRdRand16 (UINT16 *Rand); +; BOOLEAN EFIAPI InternalX86RdRand16 (UINT16 *Rand); ;------------------------------------------------------------------------------ -AsmRdRand16 PROC +InternalX86RdRand16 PROC ; rdrand ax ; generate a 16 bit RN into ax ; CF=1 if RN generated ok, otherwise CF=0 db 0fh, 0c7h, 0f0h ; rdrand r16: "0f c7 /6 ModRM:r/m(w)" @@ -44,15 +44,15 @@ rn16_ok: mov [edx], ax mov eax, 1 ret -AsmRdRand16 ENDP +InternalX86RdRand16 ENDP ;------------------------------------------------------------------------------ ; Generates a 32 bit random number through RDRAND instruction. ; Return TRUE if Rand generated successfully, or FALSE if not. ; -; BOOLEAN EFIAPI AsmRdRand32 (UINT32 *Rand); +; BOOLEAN EFIAPI InternalX86RdRand32 (UINT32 *Rand); ;------------------------------------------------------------------------------ -AsmRdRand32 PROC +InternalX86RdRand32 PROC ; rdrand eax ; generate a 32 bit RN into eax ; CF=1 if RN generated ok, otherwise CF=0 db 0fh, 0c7h, 0f0h ; rdrand r32: "0f c7 /6 ModRM:r/m(w)" @@ -64,15 +64,15 @@ rn32_ok: mov [edx], eax mov eax, 1 ret -AsmRdRand32 ENDP +InternalX86RdRand32 ENDP ;------------------------------------------------------------------------------ ; Generates a 64 bit random number through RDRAND instruction. ; Return TRUE if Rand generated successfully, or FALSE if not. ; -; BOOLEAN EFIAPI AsmRdRand64 (UINT64 *Rand); +; BOOLEAN EFIAPI InternalX86RdRand64 (UINT64 *Rand); ;------------------------------------------------------------------------------ -AsmRdRand64 PROC +InternalX86RdRand64 PROC ; rdrand eax ; generate a 32 bit RN into eax ; CF=1 if RN generated ok, otherwise CF=0 db 0fh, 0c7h, 0f0h ; rdrand r32: "0f c7 /6 ModRM:r/m(w)" @@ -89,6 +89,6 @@ AsmRdRand64 PROC rn64_ret: xor eax, eax ret ; return with failure status -AsmRdRand64 ENDP +InternalX86RdRand64 ENDP END diff --git a/MdePkg/Library/BaseLib/Ia32/RdRand.nasm b/MdePkg/Library/BaseLib/Ia32/RdRand.nasm index 1365dfc..64e8cdb 100644 --- a/MdePkg/Library/BaseLib/Ia32/RdRand.nasm +++ b/MdePkg/Library/BaseLib/Ia32/RdRand.nasm @@ -1,6 +1,6 @@ ;------------------------------------------------------------------------------ ; -; Copyright (c) 2015, Intel Corporation. All rights reserved.
+; Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.
; 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 @@ -27,10 +27,10 @@ SECTION .text ; Generates a 16 bit random number through RDRAND instruction. ; Return TRUE if Rand generated successfully, or FALSE if not. ; -; BOOLEAN EFIAPI AsmRdRand16 (UINT16 *Rand); +; BOOLEAN EFIAPI InternalX86RdRand16 (UINT16 *Rand); ;------------------------------------------------------------------------------ -global ASM_PFX(AsmRdRand16) -ASM_PFX(AsmRdRand16): +global ASM_PFX(InternalX86RdRand16) +ASM_PFX(InternalX86RdRand16): ; rdrand ax ; generate a 16 bit RN into ax ; CF=1 if RN generated ok, otherwise CF=0 db 0xf, 0xc7, 0xf0 ; rdrand r16: "0f c7 /6 ModRM:r/m(w)" @@ -47,10 +47,10 @@ rn16_ok: ; Generates a 32 bit random number through RDRAND instruction. ; Return TRUE if Rand generated successfully, or FALSE if not. ; -; BOOLEAN EFIAPI AsmRdRand32 (UINT32 *Rand); +; BOOLEAN EFIAPI InternalX86RdRand32 (UINT32 *Rand); ;------------------------------------------------------------------------------ -global ASM_PFX(AsmRdRand32) -ASM_PFX(AsmRdRand32): +global ASM_PFX(InternalX86RdRand32) +ASM_PFX(InternalX86RdRand32): ; rdrand eax ; generate a 32 bit RN into eax ; CF=1 if RN generated ok, otherwise CF=0 db 0xf, 0xc7, 0xf0 ; rdrand r32: "0f c7 /6 ModRM:r/m(w)" @@ -67,10 +67,10 @@ rn32_ok: ; Generates a 64 bit random number through RDRAND instruction. ; Return TRUE if Rand generated successfully, or FALSE if not. ; -; BOOLEAN EFIAPI AsmRdRand64 (UINT64 *Rand); +; BOOLEAN EFIAPI InternalX86RdRand64 (UINT64 *Rand); ;------------------------------------------------------------------------------ -global ASM_PFX(AsmRdRand64) -ASM_PFX(AsmRdRand64): +global ASM_PFX(InternalX86RdRand64) +ASM_PFX(InternalX86RdRand64): ; rdrand eax ; generate a 32 bit RN into eax ; CF=1 if RN generated ok, otherwise CF=0 db 0xf, 0xc7, 0xf0 ; rdrand r32: "0f c7 /6 ModRM:r/m(w)" diff --git a/MdePkg/Library/BaseLib/X64/RdRand.S b/MdePkg/Library/BaseLib/X64/RdRand.S index 49b50e6..55724c0 100644 --- a/MdePkg/Library/BaseLib/X64/RdRand.S +++ b/MdePkg/Library/BaseLib/X64/RdRand.S @@ -1,5 +1,5 @@ #------------------------------------------------------------------------------ ; -# Copyright (c) 2015, Intel Corporation. All rights reserved.
+# Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.
# 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 @@ -24,10 +24,10 @@ // Generates a 16 bit random number through RDRAND instruction. // Return TRUE if Rand generated successfully, or FALSE if not. // -// BOOLEAN EFIAPI AsmRdRand16 (UINT16 *Rand); +// BOOLEAN EFIAPI InternalX86RdRand16 (UINT16 *Rand); //------------------------------------------------------------------------------ -ASM_GLOBAL ASM_PFX(AsmRdRand16) -ASM_PFX(AsmRdRand16): +ASM_GLOBAL ASM_PFX(InternalX86RdRand16) +ASM_PFX(InternalX86RdRand16): .byte 0x0f, 0xc7, 0xf0 // rdrand r16: "0f c7 /6 ModRM:r/m(w)" jc rn16_ok // jmp if CF=1 xor %rax, %rax // reg=0 if CF=0 @@ -41,10 +41,10 @@ rn16_ok: // Generates a 32 bit random number through RDRAND instruction. // Return TRUE if Rand generated successfully, or FALSE if not. // -// BOOLEAN EFIAPI AsmRdRand32 (UINT32 *Rand); +// BOOLEAN EFIAPI InternalX86RdRand32 (UINT32 *Rand); //------------------------------------------------------------------------------ -ASM_GLOBAL ASM_PFX(AsmRdRand32) -ASM_PFX(AsmRdRand32): +ASM_GLOBAL ASM_PFX(InternalX86RdRand32) +ASM_PFX(InternalX86RdRand32): .byte 0x0f, 0xc7, 0xf0 // rdrand r32: "0f c7 /6 ModRM:r/m(w)" jc rn32_ok // jmp if CF=1 xor %rax, %rax // reg=0 if CF=0 @@ -58,10 +58,10 @@ rn32_ok: // Generates a 64 bit random number through RDRAND instruction. // Return TRUE if Rand generated successfully, or FALSE if not. // -// BOOLEAN EFIAPI AsmRdRand64 (UINT64 *Rand); +// BOOLEAN EFIAPI InternalX86RdRand64 (UINT64 *Rand); //------------------------------------------------------------------------------ -ASM_GLOBAL ASM_PFX(AsmRdRand64) -ASM_PFX(AsmRdRand64): +ASM_GLOBAL ASM_PFX(InternalX86RdRand64) +ASM_PFX(InternalX86RdRand64): .byte 0x48, 0x0f, 0xc7, 0xf0 // rdrand r64: "REX.W + 0f c7 /6 ModRM:r/m(w)" jc rn64_ok // jmp if CF=1 xor %rax, %rax // reg=0 if CF=0 diff --git a/MdePkg/Library/BaseLib/X64/RdRand.asm b/MdePkg/Library/BaseLib/X64/RdRand.asm index 370cdb6..8e2074e 100644 --- a/MdePkg/Library/BaseLib/X64/RdRand.asm +++ b/MdePkg/Library/BaseLib/X64/RdRand.asm @@ -1,6 +1,6 @@ ;------------------------------------------------------------------------------ ; -; Copyright (c) 2015, Intel Corporation. All rights reserved.
+; Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.
; 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 @@ -27,9 +27,9 @@ ; Generates a 16 bit random number through RDRAND instruction. ; Return TRUE if Rand generated successfully, or FALSE if not. ; -; BOOLEAN EFIAPI AsmRdRand16 (UINT16 *Rand); +; BOOLEAN EFIAPI InternalX86RdRand16 (UINT16 *Rand); ;------------------------------------------------------------------------------ -AsmRdRand16 PROC +InternalX86RdRand16 PROC ; rdrand ax ; generate a 16 bit RN into eax, ; CF=1 if RN generated ok, otherwise CF=0 db 0fh, 0c7h, 0f0h ; rdrand r16: "0f c7 /6 ModRM:r/m(w)" @@ -40,15 +40,15 @@ rn16_ok: mov [rcx], ax mov rax, 1 ret -AsmRdRand16 ENDP +InternalX86RdRand16 ENDP ;------------------------------------------------------------------------------ ; Generates a 32 bit random number through RDRAND instruction. ; Return TRUE if Rand generated successfully, or FALSE if not. ; -; BOOLEAN EFIAPI AsmRdRand32 (UINT32 *Rand); +; BOOLEAN EFIAPI InternalX86RdRand32 (UINT32 *Rand); ;------------------------------------------------------------------------------ -AsmRdRand32 PROC +InternalX86RdRand32 PROC ; rdrand eax ; generate a 32 bit RN into eax, ; CF=1 if RN generated ok, otherwise CF=0 db 0fh, 0c7h, 0f0h ; rdrand r32: "0f c7 /6 ModRM:r/m(w)" @@ -59,15 +59,15 @@ rn32_ok: mov [rcx], eax mov rax, 1 ret -AsmRdRand32 ENDP +InternalX86RdRand32 ENDP ;------------------------------------------------------------------------------ ; Generates a 64 bit random number through one RDRAND instruction. ; Return TRUE if Rand generated successfully, or FALSE if not. ; -; BOOLEAN EFIAPI AsmRdRand64 (UINT64 *Random); +; BOOLEAN EFIAPI InternalX86RdRand64 (UINT64 *Random); ;------------------------------------------------------------------------------ -AsmRdRand64 PROC +InternalX86RdRand64 PROC ; rdrand rax ; generate a 64 bit RN into rax, ; CF=1 if RN generated ok, otherwise CF=0 db 048h, 0fh, 0c7h, 0f0h ; rdrand r64: "REX.W + 0f c7 /6 ModRM:r/m(w)" @@ -78,6 +78,6 @@ rn64_ok: mov [rcx], rax mov rax, 1 ret -AsmRdRand64 ENDP +InternalX86RdRand64 ENDP END diff --git a/MdePkg/Library/BaseLib/X64/RdRand.nasm b/MdePkg/Library/BaseLib/X64/RdRand.nasm index f6d83a3..b9050d2 100644 --- a/MdePkg/Library/BaseLib/X64/RdRand.nasm +++ b/MdePkg/Library/BaseLib/X64/RdRand.nasm @@ -1,6 +1,6 @@ ;------------------------------------------------------------------------------ ; -; Copyright (c) 2015, Intel Corporation. All rights reserved.
+; Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.
; 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 @@ -28,10 +28,10 @@ ; Generates a 16 bit random number through RDRAND instruction. ; Return TRUE if Rand generated successfully, or FALSE if not. ; -; BOOLEAN EFIAPI AsmRdRand16 (UINT16 *Rand); +; BOOLEAN EFIAPI InternalX86RdRand16 (UINT16 *Rand); ;------------------------------------------------------------------------------ -global ASM_PFX(AsmRdRand16) -ASM_PFX(AsmRdRand16): +global ASM_PFX(InternalX86RdRand16) +ASM_PFX(InternalX86RdRand16): ; rdrand ax ; generate a 16 bit RN into eax, ; CF=1 if RN generated ok, otherwise CF=0 db 0xf, 0xc7, 0xf0 ; rdrand r16: "0f c7 /6 ModRM:r/m(w)" @@ -47,10 +47,10 @@ rn16_ok: ; Generates a 32 bit random number through RDRAND instruction. ; Return TRUE if Rand generated successfully, or FALSE if not. ; -; BOOLEAN EFIAPI AsmRdRand32 (UINT32 *Rand); +; BOOLEAN EFIAPI InternalX86RdRand32 (UINT32 *Rand); ;------------------------------------------------------------------------------ -global ASM_PFX(AsmRdRand32) -ASM_PFX(AsmRdRand32): +global ASM_PFX(InternalX86RdRand32) +ASM_PFX(InternalX86RdRand32): ; rdrand eax ; generate a 32 bit RN into eax, ; CF=1 if RN generated ok, otherwise CF=0 db 0xf, 0xc7, 0xf0 ; rdrand r32: "0f c7 /6 ModRM:r/m(w)" @@ -66,10 +66,10 @@ rn32_ok: ; Generates a 64 bit random number through one RDRAND instruction. ; Return TRUE if Rand generated successfully, or FALSE if not. ; -; BOOLEAN EFIAPI AsmRdRand64 (UINT64 *Random); +; BOOLEAN EFIAPI InternalX86RdRand64 (UINT64 *Random); ;------------------------------------------------------------------------------ -global ASM_PFX(AsmRdRand64) -ASM_PFX(AsmRdRand64): +global ASM_PFX(InternalX86RdRand64) +ASM_PFX(InternalX86RdRand64): ; rdrand rax ; generate a 64 bit RN into rax, ; CF=1 if RN generated ok, otherwise CF=0 db 0x48, 0xf, 0xc7, 0xf0 ; rdrand r64: "REX.W + 0f c7 /6 ModRM:r/m(w)" diff --git a/MdePkg/Library/BaseLib/X86RdRand.c b/MdePkg/Library/BaseLib/X86RdRand.c new file mode 100644 index 0000000..36d5457 --- /dev/null +++ b/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.
+ 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); +} -- 2.10.1.windows.1