wow64: Allow the CPU backend to override CPU information.

dlls/wow64/syscall.c

@@ -110,7 +110,7 @@ static void     (WINAPI *pBTCpuSimulate)(void);
 static NTSTATUS (WINAPI *pBTCpuResetToConsistentState)( EXCEPTION_POINTERS * );
 static void *   (WINAPI *p__wine_get_unix_opcode)(void);
 static void *   (WINAPI *pKiRaiseUserExceptionDispatcher)(void);
-
+void (WINAPI *pBTCpuUpdateProcessorInformation)( SYSTEM_CPU_INFORMATION * ) = NULL;
 
 void *dummy = RtlUnwind;
 
@@ -842,6 +842,7 @@ static DWORD WINAPI process_init( RTL_RUN_ONCE *once, void *param, void **contex
     GET_PTR( BTCpuResetToConsistentState );
     GET_PTR( BTCpuSetContext );
     GET_PTR( BTCpuSimulate );
+    GET_PTR( BTCpuUpdateProcessorInformation );
     GET_PTR( __wine_get_unix_opcode );
 
     module = load_64bit_module( L"wow64win.dll" );

dlls/wow64/system.c

@@ -337,7 +337,9 @@ NTSTATUS WINAPI wow64_NtQuerySystemInformation( UINT *args )
 
     case SystemCpuInformation:  /* SYSTEM_CPU_INFORMATION */
     case SystemEmulationProcessorInformation:  /* SYSTEM_CPU_INFORMATION */
-        return NtQuerySystemInformation( SystemEmulationProcessorInformation, ptr, len, retlen );
+        status = NtQuerySystemInformation( SystemEmulationProcessorInformation, ptr, len, retlen );
+        if (!status && pBTCpuUpdateProcessorInformation) pBTCpuUpdateProcessorInformation( ptr );
+        return status;
 
     case SystemBasicInformation:  /* SYSTEM_BASIC_INFORMATION */
     case SystemEmulationBasicInformation:  /* SYSTEM_BASIC_INFORMATION */

dlls/wow64/wow64_private.h

@@ -38,6 +38,7 @@ extern ULONG_PTR args_alignment DECLSPEC_HIDDEN;
 extern ULONG_PTR highest_user_address DECLSPEC_HIDDEN;
 extern ULONG_PTR default_zero_bits DECLSPEC_HIDDEN;
 extern SYSTEM_DLL_INIT_BLOCK *pLdrSystemDllInitBlock DECLSPEC_HIDDEN;
+extern void (WINAPI *pBTCpuUpdateProcessorInformation)( SYSTEM_CPU_INFORMATION * ) DECLSPEC_HIDDEN;
 
 struct object_attr64
 {