1 files changed, 43 insertions, 0 deletions
diff --git a/MdePkg/Library/StackCheckLib/IA32/CheckCookieMsvc.nasm b/MdePkg/Library/StackCheckLib/IA32/CheckCookieMsvc.nasm
new file mode 100644
index 0000000000..a52ee90ad9
--- /dev/null
+++ b/MdePkg/Library/StackCheckLib/IA32/CheckCookieMsvc.nasm
@@ -0,0 +1,43 @@
+;------------------------------------------------------------------------------
+; IA32/CheckCookieMsvc.nasm
+;
+; Copyright (c) Microsoft Corporation.
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;------------------------------------------------------------------------------
+
+    DEFAULT REL
+    SECTION .text
+
+extern ASM_PFX(StackCheckFailure)
+extern ASM_PFX(__security_cookie)
+extern ASM_PFX(CpuDeadLoop)
+
+; Called when a buffer check fails. This functionality is dependent on MSVC
+; C runtime libraries and so is unsupported in UEFI.
+global ASM_PFX(__report_rangecheckfailure)
+ASM_PFX(__report_rangecheckfailure):
+    jmp ASM_PFX(CpuDeadLoop)
+    ret
+
+; The GS handler is for checking the stack cookie during SEH or
+; EH exceptions and is unsupported in UEFI.
+global ASM_PFX(__GSHandlerCheck)
+ASM_PFX(__GSHandlerCheck):
+    jmp ASM_PFX(CpuDeadLoop)
+    ret
+
+;------------------------------------------------------------------------------
+; Checks the stack cookie value against __security_cookie and calls the
+; stack cookie failure handler if there is a mismatch.
+;
+; VOID
+; EFIAPI
+; __security_check_cookie (
+;   IN UINTN CheckValue
+;   );
+;------------------------------------------------------------------------------
+global @__security_check_cookie@4
+@__security_check_cookie@4:
+    cmp    ecx, [ASM_PFX(__security_cookie)]
+    jne    ASM_PFX(StackCheckFailure)
+    ret