1 files changed, 93 insertions, 0 deletions
diff --git a/CryptoPkg/Library/BaseCryptLib/SysCall/Ia32/MathReminderU64x64.c b/CryptoPkg/Library/BaseCryptLib/SysCall/Ia32/MathReminderU64x64.c
new file mode 100644
index 0000000000..be70770ebb
--- /dev/null
+++ b/CryptoPkg/Library/BaseCryptLib/SysCall/Ia32/MathReminderU64x64.c
@@ -0,0 +1,93 @@
+/** @file
+  64-bit Math Worker Function.
+  The 32-bit versions of C compiler generate calls to library routines
+  to handle 64-bit math. These functions use non-standard calling conventions.
+
+Copyright (c) 2009 - 2010, 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 <Library/BaseLib.h>
+
+
+/*
+ * Divides a 64-bit unsigned value by another 64-bit unsigned value and returns
+ * the 64-bit unsigned remainder.
+ */
+__declspec(naked) void __cdecl _aullrem(void)
+{
+  //
+  // Wrapper Implementation over EDKII DivU64x64Remainder() routine
+  //    UINT64
+  //    EFIAPI
+  //    DivU64x64Remainder (
+  //      IN      UINT64     Dividend,
+  //      IN      UINT64     Divisor,
+  //      OUT     UINT64     *Remainder  OPTIONAL
+  //      )
+  //
+  _asm {
+    ; Original local stack when calling _aullrem
+    ;               -----------------
+    ;               |               |
+    ;               |---------------|
+    ;               |               |
+    ;               |--  Divisor  --|
+    ;               |               |
+    ;               |---------------|
+    ;               |               |
+    ;               |--  Dividend --|
+    ;               |               |
+    ;               |---------------|
+    ;               |  ReturnAddr** |
+    ;       ESP---->|---------------|
+    ;
+
+    ;
+    ; Set up the local stack for Reminder pointer
+    ;
+    sub  esp, 8
+    push esp
+
+    ;
+    ; Set up the local stack for Divisor parameter
+    ;
+    mov  eax, [esp + 28]
+    push eax
+    mov  eax, [esp + 28]
+    push eax
+
+    ;
+    ; Set up the local stack for Dividend parameter
+    ;
+    mov  eax, [esp + 28]
+    push eax
+    mov  eax, [esp + 28]
+    push eax
+
+    ;
+    ; Call native DivU64x64Remainder of BaseLib
+    ;
+    call DivU64x64Remainder
+
+    ;
+    ; Put the Reminder in EDX:EAX as return value
+    ;
+    mov  eax, [esp + 20]
+    mov  edx, [esp + 24]
+
+    ;
+    ; Adjust stack
+    ;
+    add  esp, 28
+
+    ret  16
+  }
+}