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diff --git a/src/vm/i386/gmsasm.S b/src/vm/i386/gmsasm.S
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+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+.intel_syntax noprefix
+#include "unixasmmacros.inc"
+#include "asmconstants.h"
+
+// int __fastcall LazyMachStateCaptureState(struct LazyMachState *pState);
+LEAF_ENTRY LazyMachStateCaptureState, _TEXT
+ // marks that this is not yet valid
+ mov dword ptr [ecx+MachState__pRetAddr], 0
+
+ // remember register values
+ mov [ecx+MachState__edi], edi
+ mov [ecx+MachState__esi], esi
+ mov [ecx+MachState__ebx], ebx
+ mov [ecx+LazyMachState_captureEbp], ebp
+ mov [ecx+LazyMachState_captureEsp], esp
+
+ // capture return address
+ mov eax, [esp]
+ mov dword ptr [ecx+LazyMachState_captureEip], eax
+
+ // return 0
+ xor eax, eax
+ ret
+LEAF_END LazyMachStateCaptureState, _TEXT