diff --git a/dlls/msvcp100/exception.c b/dlls/msvcp100/exception.c
index 1f4ffd2eed2..2e9f1aad63e 100644
--- a/dlls/msvcp100/exception.c
+++ b/dlls/msvcp100/exception.c
@@ -454,6 +454,45 @@ void __cdecl _Nomemory(void)
     throw_exception(EXCEPTION_BAD_ALLOC, NULL);
 }
 
+/* ?_Xmem@tr1@std@@YAXXZ */
+void __cdecl _Xmem(void)
+{
+    TRACE("()\n");
+    throw_exception(EXCEPTION_BAD_ALLOC, NULL);
+}
+
+/* ?_Xinvalid_argument@std@@YAXPBD@Z */
+/* ?_Xinvalid_argument@std@@YAXPEBD@Z */
+void __cdecl _Xinvalid_argument(const char *str)
+{
+    TRACE("(%s)\n", debugstr_a(str));
+    throw_exception(EXCEPTION_INVALID_ARGUMENT, str);
+}
+
+/* ?_Xlength_error@std@@YAXPBD@Z */
+/* ?_Xlength_error@std@@YAXPEBD@Z */
+void __cdecl _Xlength_error(const char *str)
+{
+    TRACE("(%s)\n", debugstr_a(str));
+    throw_exception(EXCEPTION_LENGTH_ERROR, str);
+}
+
+/* ?_Xout_of_range@std@@YAXPBD@Z */
+/* ?_Xout_of_range@std@@YAXPEBD@Z */
+void __cdecl _Xout_of_range(const char *str)
+{
+    TRACE("(%s)\n", debugstr_a(str));
+    throw_exception(EXCEPTION_OUT_OF_RANGE, str);
+}
+
+/* ?_Xruntime_error@std@@YAXPBD@Z */
+/* ?_Xruntime_error@std@@YAXPEBD@Z */
+void __cdecl _Xruntime_error(const char *str)
+{
+    TRACE("(%s)\n", debugstr_a(str));
+    throw_exception(EXCEPTION_RUNTIME_ERROR, str);
+}
+
 #ifndef __GNUC__
 void __asm_dummy_vtables(void) {
 #endif
diff --git a/dlls/msvcp100/msvcp100.spec b/dlls/msvcp100/msvcp100.spec
index e4ac191e46d..6a67b3bf872 100644
--- a/dlls/msvcp100/msvcp100.spec
+++ b/dlls/msvcp100/msvcp100.spec
@@ -1232,17 +1232,17 @@
 @ stub ?_XLgamma@tr1@std@@YAOO@Z
 @ stub ?_Xbad@tr1@std@@YAXW4error_type@regex_constants@12@@Z
 @ stub ?_Xfunc@tr1@std@@YAXXZ
-@ stub -arch=win32 ?_Xinvalid_argument@std@@YAXPBD@Z
-@ stub -arch=win64 ?_Xinvalid_argument@std@@YAXPEBD@Z
-@ stub -arch=win32 ?_Xlength_error@std@@YAXPBD@Z
-@ stub -arch=win64 ?_Xlength_error@std@@YAXPEBD@Z
-@ stub ?_Xmem@tr1@std@@YAXXZ
-@ stub -arch=win32 ?_Xout_of_range@std@@YAXPBD@Z
-@ stub -arch=win64 ?_Xout_of_range@std@@YAXPEBD@Z
+@ cdecl -arch=win32 ?_Xinvalid_argument@std@@YAXPBD@Z(str) _Xinvalid_argument
+@ cdecl -arch=win64 ?_Xinvalid_argument@std@@YAXPEBD@Z(str) _Xinvalid_argument
+@ cdecl -arch=win32 ?_Xlength_error@std@@YAXPBD@Z(str) _Xlength_error
+@ cdecl -arch=win64 ?_Xlength_error@std@@YAXPEBD@Z(str) _Xlength_error
+@ cdecl ?_Xmem@tr1@std@@YAXXZ() _Xmem
+@ cdecl -arch=win32 ?_Xout_of_range@std@@YAXPBD@Z(str) _Xout_of_range
+@ cdecl -arch=win64 ?_Xout_of_range@std@@YAXPEBD@Z(str) _Xout_of_range
 @ stub -arch=win32 ?_Xoverflow_error@std@@YAXPBD@Z
 @ stub -arch=win64 ?_Xoverflow_error@std@@YAXPEBD@Z
-@ stub -arch=win32 ?_Xruntime_error@std@@YAXPBD@Z
-@ stub -arch=win64 ?_Xruntime_error@std@@YAXPEBD@Z
+@ cdecl -arch=win32 ?_Xruntime_error@std@@YAXPBD@Z(str) _Xruntime_error
+@ cdecl -arch=win64 ?_Xruntime_error@std@@YAXPEBD@Z(str) _Xruntime_error
 @ thiscall -arch=win32 ?always_noconv@codecvt_base@std@@QBE_NXZ(ptr) codecvt_base_always_noconv
 @ cdecl -arch=win64 ?always_noconv@codecvt_base@std@@QEBA_NXZ(ptr) codecvt_base_always_noconv
 @ thiscall -arch=win32 ?bad@ios_base@std@@QBE_NXZ(ptr) ios_base_bad