Add missing file.

src/x86.asm

@@ -0,0 +1,36 @@
+;
+; This module implements all assembler code
+;
+.686p
+.model flat, c
+.MMX
+.XMM
+
+; Declare the external functions and global variables
+EXTERN g_pfnSys_Error: PTR VOID
+EXTERN MH_SysError: PROC
+
+MH_SysErrorWrapper proto
+.SAFESEH MH_SysErrorWrapper
+
+.CODE
+
+MH_SysErrorWrapper PROC
+
+    ; Check if g_pfnSys_Error is NULL
+    mov eax, dword ptr [g_pfnSys_Error] ; Load the value of g_pfnSysError
+    test eax, eax           ; Test if eax is zero (NULL)
+    jz fallback             ; If zero, jump to fallback code
+
+    ; Call the function pointed to by g_pfnSysError
+    ; Since we're using __cdecl, the arguments are already on the stack
+    jmp eax                ; Call the function pointer
+
+fallback:
+    ; Call the default function MH_SysError
+    ; The arguments are already on the stack, so just call the function
+    jmp MH_SysError
+
+MH_SysErrorWrapper ENDP
+
+END