msxml3: Add some useful traces and demangle some parameter names.
[wine] / dlls / rpcrt4 / cproxy.c
1 /*
2  * COM proxy implementation
3  *
4  * Copyright 2001 Ove Kåven, TransGaming Technologies
5  * Copyright 2009 Alexandre Julliard
6  *
7  * This library is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * This library is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with this library; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20  * 
21  * TODO: Handle non-i386 architectures
22  */
23
24 #include "config.h"
25 #include "wine/port.h"
26
27 #include <stdarg.h>
28
29 #define COBJMACROS
30
31 #include "windef.h"
32 #include "winbase.h"
33 #include "winerror.h"
34
35 #include "objbase.h"
36 #include "rpcproxy.h"
37
38 #include "cpsf.h"
39 #include "ndr_misc.h"
40 #include "ndr_stubless.h"
41 #include "wine/debug.h"
42
43 WINE_DEFAULT_DEBUG_CHANNEL(ole);
44
45 /* I don't know what MS's std proxy structure looks like,
46    so this probably doesn't match, but that shouldn't matter */
47 typedef struct {
48   IRpcProxyBuffer IRpcProxyBuffer_iface;
49   LPVOID *PVtbl;
50   LONG RefCount;
51   const IID* piid;
52   LPUNKNOWN pUnkOuter;
53   IUnknown *base_object;  /* must be at offset 0x10 from PVtbl */
54   IRpcProxyBuffer *base_proxy;
55   PCInterfaceName name;
56   LPPSFACTORYBUFFER pPSFactory;
57   LPRPCCHANNELBUFFER pChannel;
58 } StdProxyImpl;
59
60 static const IRpcProxyBufferVtbl StdProxy_Vtbl;
61
62 static inline StdProxyImpl *impl_from_IRpcProxyBuffer(IRpcProxyBuffer *iface)
63 {
64     return CONTAINING_RECORD(iface, StdProxyImpl, IRpcProxyBuffer_iface);
65 }
66
67 static inline StdProxyImpl *impl_from_proxy_obj( void *iface )
68 {
69     return CONTAINING_RECORD(iface, StdProxyImpl, PVtbl);
70 }
71
72 #ifdef __i386__
73
74 extern void call_stubless_func(void);
75 __ASM_GLOBAL_FUNC(call_stubless_func,
76                   "movl 4(%esp),%ecx\n\t"         /* This pointer */
77                   "movl (%ecx),%ecx\n\t"          /* This->lpVtbl */
78                   "movl -8(%ecx),%ecx\n\t"        /* MIDL_STUBLESS_PROXY_INFO */
79                   "movl 8(%ecx),%edx\n\t"         /* info->FormatStringOffset */
80                   "movzwl (%edx,%eax,2),%edx\n\t" /* FormatStringOffset[index] */
81                   "addl 4(%ecx),%edx\n\t"         /* info->ProcFormatString + offset */
82                   "movzwl 8(%edx),%eax\n\t"       /* arguments size */
83                   "pushl %eax\n\t"
84                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
85                   "leal 8(%esp),%eax\n\t"         /* &This */
86                   "pushl %eax\n\t"
87                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
88                   "pushl %edx\n\t"                /* format string */
89                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
90                   "pushl (%ecx)\n\t"              /* info->pStubDesc */
91                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
92                   "call " __ASM_NAME("ndr_client_call") "\n\t"
93                   "leal 12(%esp),%esp\n\t"
94                   __ASM_CFI(".cfi_adjust_cfa_offset -12\n\t")
95                   "popl %edx\n\t"                 /* arguments size */
96                   __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
97                   "movl (%esp),%ecx\n\t"  /* return address */
98                   "addl %edx,%esp\n\t"
99                   "jmp *%ecx" );
100
101 #include "pshpack1.h"
102 struct thunk
103 {
104   BYTE mov_eax;
105   DWORD index;
106   BYTE jmp;
107   LONG handler;
108 };
109 #include "poppack.h"
110
111 static inline void init_thunk( struct thunk *thunk, unsigned int index )
112 {
113     thunk->mov_eax = 0xb8; /* movl $n,%eax */
114     thunk->index   = index;
115     thunk->jmp     = 0xe9; /* jmp */
116     thunk->handler = (char *)call_stubless_func - (char *)(&thunk->handler + 1);
117 }
118
119 #elif defined(__x86_64__)
120
121 extern void call_stubless_func(void);
122 __ASM_GLOBAL_FUNC(call_stubless_func,
123                   "movq %rcx,0x8(%rsp)\n\t"
124                   "movq %rdx,0x10(%rsp)\n\t"
125                   "movq %r8,0x18(%rsp)\n\t"
126                   "movq %r9,0x20(%rsp)\n\t"
127                   "leaq 0x8(%rsp),%r8\n\t"        /* &This */
128                   "movq (%rcx),%rcx\n\t"          /* This->lpVtbl */
129                   "movq -0x10(%rcx),%rcx\n\t"     /* MIDL_STUBLESS_PROXY_INFO */
130                   "movq 0x10(%rcx),%rdx\n\t"      /* info->FormatStringOffset */
131                   "movzwq (%rdx,%r10,2),%rdx\n\t" /* FormatStringOffset[index] */
132                   "addq 8(%rcx),%rdx\n\t"         /* info->ProcFormatString + offset */
133                   "movq (%rcx),%rcx\n\t"          /* info->pStubDesc */
134                   "subq $0x38,%rsp\n\t"
135                   __ASM_CFI(".cfi_adjust_cfa_offset 0x38\n\t")
136                   "movq %xmm1,0x20(%rsp)\n\t"
137                   "movq %xmm2,0x28(%rsp)\n\t"
138                   "movq %xmm3,0x30(%rsp)\n\t"
139                   "leaq 0x18(%rsp),%r9\n\t"       /* fpu_args */
140                   "call " __ASM_NAME("ndr_client_call") "\n\t"
141                   "addq $0x38,%rsp\n\t"
142                   __ASM_CFI(".cfi_adjust_cfa_offset -0x38\n\t")
143                   "ret" );
144
145 #include "pshpack1.h"
146 struct thunk
147 {
148     BYTE mov_r10[3];
149     DWORD index;
150     BYTE mov_rax[2];
151     void *call_stubless;
152     BYTE jmp_rax[2];
153 };
154 #include "poppack.h"
155
156 static const struct thunk thunk_template =
157 {
158     { 0x49, 0xc7, 0xc2 }, 0,  /* movq $index,%r10 */
159     { 0x48, 0xb8 }, 0,        /* movq $call_stubless_func,%rax */
160     { 0xff, 0xe0 }            /* jmp *%rax */
161 };
162
163 static inline void init_thunk( struct thunk *thunk, unsigned int index )
164 {
165     *thunk = thunk_template;
166     thunk->index = index;
167     thunk->call_stubless = call_stubless_func;
168 }
169
170 #else  /* __i386__ */
171
172 #warning You must implement stubless proxies for your CPU
173
174 struct thunk
175 {
176   DWORD index;
177 };
178
179 static inline void init_thunk( struct thunk *thunk, unsigned int index )
180 {
181     thunk->index = index;
182 }
183
184 #endif  /* __i386__ */
185
186 #define BLOCK_SIZE 1024
187 #define MAX_BLOCKS 64  /* 64k methods should be enough for anybody */
188
189 static const struct thunk *method_blocks[MAX_BLOCKS];
190
191 static const struct thunk *allocate_block( unsigned int num )
192 {
193     unsigned int i;
194     struct thunk *prev, *block;
195
196     block = VirtualAlloc( NULL, BLOCK_SIZE * sizeof(*block),
197                           MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE );
198     if (!block) return NULL;
199
200     for (i = 0; i < BLOCK_SIZE; i++) init_thunk( &block[i], BLOCK_SIZE * num + i + 3 );
201     VirtualProtect( block, BLOCK_SIZE * sizeof(*block), PAGE_EXECUTE_READ, NULL );
202     prev = InterlockedCompareExchangePointer( (void **)&method_blocks[num], block, NULL );
203     if (prev) /* someone beat us to it */
204     {
205         VirtualFree( block, 0, MEM_RELEASE );
206         block = prev;
207     }
208     return block;
209 }
210
211 static BOOL fill_stubless_table( IUnknownVtbl *vtbl, DWORD num )
212 {
213     const void **entry = (const void **)(vtbl + 1);
214     DWORD i, j;
215
216     if (num - 3 > BLOCK_SIZE * MAX_BLOCKS)
217     {
218         FIXME( "%u methods not supported\n", num );
219         return FALSE;
220     }
221     for (i = 0; i < (num - 3 + BLOCK_SIZE - 1) / BLOCK_SIZE; i++)
222     {
223         const struct thunk *block = method_blocks[i];
224         if (!block && !(block = allocate_block( i ))) return FALSE;
225         for (j = 0; j < BLOCK_SIZE && j < num - 3 - i * BLOCK_SIZE; j++, entry++)
226             if (*entry == (LPVOID)-1) *entry = &block[j];
227     }
228     return TRUE;
229 }
230
231 HRESULT StdProxy_Construct(REFIID riid,
232                            LPUNKNOWN pUnkOuter,
233                            const ProxyFileInfo *ProxyInfo,
234                            int Index,
235                            LPPSFACTORYBUFFER pPSFactory,
236                            LPRPCPROXYBUFFER *ppProxy,
237                            LPVOID *ppvObj)
238 {
239   StdProxyImpl *This;
240   PCInterfaceName name = ProxyInfo->pNamesArray[Index];
241   CInterfaceProxyVtbl *vtbl = ProxyInfo->pProxyVtblList[Index];
242
243   TRACE("(%p,%p,%p,%p,%p) %s\n", pUnkOuter, vtbl, pPSFactory, ppProxy, ppvObj, name);
244
245   /* TableVersion = 2 means it is the stubless version of CInterfaceProxyVtbl */
246   if (ProxyInfo->TableVersion > 1) {
247     ULONG count = ProxyInfo->pStubVtblList[Index]->header.DispatchTableCount;
248     vtbl = (CInterfaceProxyVtbl *)((const void **)vtbl + 1);
249     TRACE("stubless vtbl %p: count=%d\n", vtbl->Vtbl, count );
250     fill_stubless_table( (IUnknownVtbl *)vtbl->Vtbl, count );
251   }
252
253   if (!IsEqualGUID(vtbl->header.piid, riid)) {
254     ERR("IID mismatch during proxy creation\n");
255     return RPC_E_UNEXPECTED;
256   }
257
258   This = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(StdProxyImpl));
259   if (!This) return E_OUTOFMEMORY;
260
261   if (!pUnkOuter) pUnkOuter = (IUnknown *)This;
262   This->IRpcProxyBuffer_iface.lpVtbl = &StdProxy_Vtbl;
263   This->PVtbl = vtbl->Vtbl;
264   /* one reference for the proxy */
265   This->RefCount = 1;
266   This->piid = vtbl->header.piid;
267   This->base_object = NULL;
268   This->base_proxy = NULL;
269   This->pUnkOuter = pUnkOuter;
270   This->name = name;
271   This->pPSFactory = pPSFactory;
272   This->pChannel = NULL;
273
274   if(ProxyInfo->pDelegatedIIDs && ProxyInfo->pDelegatedIIDs[Index])
275   {
276       HRESULT r = create_proxy( ProxyInfo->pDelegatedIIDs[Index], NULL,
277                                 &This->base_proxy, (void **)&This->base_object );
278       if (FAILED(r))
279       {
280           HeapFree( GetProcessHeap(), 0, This );
281           return r;
282       }
283   }
284
285   *ppProxy = &This->IRpcProxyBuffer_iface;
286   *ppvObj = &This->PVtbl;
287   IUnknown_AddRef((IUnknown *)*ppvObj);
288   IPSFactoryBuffer_AddRef(pPSFactory);
289
290   TRACE( "iid=%s this %p proxy %p obj %p vtbl %p base proxy %p base obj %p\n",
291          debugstr_guid(riid), This, *ppProxy, *ppvObj, This->PVtbl, This->base_proxy, This->base_object );
292   return S_OK;
293 }
294
295 static HRESULT WINAPI StdProxy_QueryInterface(LPRPCPROXYBUFFER iface,
296                                              REFIID riid,
297                                              LPVOID *obj)
298 {
299   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
300   TRACE("(%p)->QueryInterface(%s,%p)\n",This,debugstr_guid(riid),obj);
301
302   if (IsEqualGUID(&IID_IUnknown,riid) ||
303       IsEqualGUID(This->piid,riid)) {
304     *obj = &This->PVtbl;
305     InterlockedIncrement(&This->RefCount);
306     return S_OK;
307   }
308
309   if (IsEqualGUID(&IID_IRpcProxyBuffer,riid)) {
310     *obj = &This->IRpcProxyBuffer_iface;
311     InterlockedIncrement(&This->RefCount);
312     return S_OK;
313   }
314
315   return E_NOINTERFACE;
316 }
317
318 static ULONG WINAPI StdProxy_AddRef(LPRPCPROXYBUFFER iface)
319 {
320   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
321   TRACE("(%p)->AddRef()\n",This);
322
323   return InterlockedIncrement(&This->RefCount);
324 }
325
326 static ULONG WINAPI StdProxy_Release(LPRPCPROXYBUFFER iface)
327 {
328   ULONG refs;
329   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
330   TRACE("(%p)->Release()\n",This);
331
332   refs = InterlockedDecrement(&This->RefCount);
333   if (!refs)
334   {
335     if (This->pChannel)
336       IRpcProxyBuffer_Disconnect(&This->IRpcProxyBuffer_iface);
337
338     if (This->base_object) IUnknown_Release( This->base_object );
339     if (This->base_proxy) IRpcProxyBuffer_Release( This->base_proxy );
340
341     IPSFactoryBuffer_Release(This->pPSFactory);
342     HeapFree(GetProcessHeap(),0,This);
343   }
344
345   return refs;
346 }
347
348 static HRESULT WINAPI StdProxy_Connect(LPRPCPROXYBUFFER iface,
349                                       LPRPCCHANNELBUFFER pChannel)
350 {
351   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
352   TRACE("(%p)->Connect(%p)\n",This,pChannel);
353
354   This->pChannel = pChannel;
355   IRpcChannelBuffer_AddRef(pChannel);
356   if (This->base_proxy) IRpcProxyBuffer_Connect( This->base_proxy, pChannel );
357   return S_OK;
358 }
359
360 static VOID WINAPI StdProxy_Disconnect(LPRPCPROXYBUFFER iface)
361 {
362   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
363   TRACE("(%p)->Disconnect()\n",This);
364
365   if (This->base_proxy) IRpcProxyBuffer_Disconnect( This->base_proxy );
366
367   IRpcChannelBuffer_Release(This->pChannel);
368   This->pChannel = NULL;
369 }
370
371 static const IRpcProxyBufferVtbl StdProxy_Vtbl =
372 {
373   StdProxy_QueryInterface,
374   StdProxy_AddRef,
375   StdProxy_Release,
376   StdProxy_Connect,
377   StdProxy_Disconnect
378 };
379
380 static void StdProxy_GetChannel(LPVOID iface,
381                                    LPRPCCHANNELBUFFER *ppChannel)
382 {
383   StdProxyImpl *This = impl_from_proxy_obj( iface );
384   TRACE("(%p)->GetChannel(%p) %s\n",This,ppChannel,This->name);
385
386   *ppChannel = This->pChannel;
387 }
388
389 static void StdProxy_GetIID(LPVOID iface,
390                                const IID **ppiid)
391 {
392   StdProxyImpl *This = impl_from_proxy_obj( iface );
393   TRACE("(%p)->GetIID(%p) %s\n",This,ppiid,This->name);
394
395   *ppiid = This->piid;
396 }
397
398 HRESULT WINAPI IUnknown_QueryInterface_Proxy(LPUNKNOWN iface,
399                                             REFIID riid,
400                                             LPVOID *ppvObj)
401 {
402   StdProxyImpl *This = impl_from_proxy_obj( iface );
403   TRACE("(%p)->QueryInterface(%s,%p) %s\n",This,debugstr_guid(riid),ppvObj,This->name);
404   return IUnknown_QueryInterface(This->pUnkOuter,riid,ppvObj);
405 }
406
407 ULONG WINAPI IUnknown_AddRef_Proxy(LPUNKNOWN iface)
408 {
409   StdProxyImpl *This = impl_from_proxy_obj( iface );
410   TRACE("(%p)->AddRef() %s\n",This,This->name);
411   return IUnknown_AddRef(This->pUnkOuter);
412 }
413
414 ULONG WINAPI IUnknown_Release_Proxy(LPUNKNOWN iface)
415 {
416   StdProxyImpl *This = impl_from_proxy_obj( iface );
417   TRACE("(%p)->Release() %s\n",This,This->name);
418   return IUnknown_Release(This->pUnkOuter);
419 }
420
421 /***********************************************************************
422  *           NdrProxyInitialize [RPCRT4.@]
423  */
424 void WINAPI NdrProxyInitialize(void *This,
425                               PRPC_MESSAGE pRpcMsg,
426                               PMIDL_STUB_MESSAGE pStubMsg,
427                               PMIDL_STUB_DESC pStubDescriptor,
428                               unsigned int ProcNum)
429 {
430   TRACE("(%p,%p,%p,%p,%d)\n", This, pRpcMsg, pStubMsg, pStubDescriptor, ProcNum);
431   NdrClientInitializeNew(pRpcMsg, pStubMsg, pStubDescriptor, ProcNum);
432   StdProxy_GetChannel(This, &pStubMsg->pRpcChannelBuffer);
433   IRpcChannelBuffer_GetDestCtx(pStubMsg->pRpcChannelBuffer,
434                                &pStubMsg->dwDestContext,
435                                &pStubMsg->pvDestContext);
436   TRACE("channel=%p\n", pStubMsg->pRpcChannelBuffer);
437 }
438
439 /***********************************************************************
440  *           NdrProxyGetBuffer [RPCRT4.@]
441  */
442 void WINAPI NdrProxyGetBuffer(void *This,
443                              PMIDL_STUB_MESSAGE pStubMsg)
444 {
445   HRESULT hr;
446   const IID *riid = NULL;
447
448   TRACE("(%p,%p)\n", This, pStubMsg);
449   pStubMsg->RpcMsg->BufferLength = pStubMsg->BufferLength;
450   pStubMsg->dwStubPhase = PROXY_GETBUFFER;
451   StdProxy_GetIID(This, &riid);
452   hr = IRpcChannelBuffer_GetBuffer(pStubMsg->pRpcChannelBuffer,
453                                   (RPCOLEMESSAGE*)pStubMsg->RpcMsg,
454                                   riid);
455   if (FAILED(hr))
456   {
457     RpcRaiseException(hr);
458     return;
459   }
460   pStubMsg->fBufferValid = TRUE;
461   pStubMsg->BufferStart = pStubMsg->RpcMsg->Buffer;
462   pStubMsg->BufferEnd = pStubMsg->BufferStart + pStubMsg->BufferLength;
463   pStubMsg->Buffer = pStubMsg->BufferStart;
464   pStubMsg->dwStubPhase = PROXY_MARSHAL;
465 }
466
467 /***********************************************************************
468  *           NdrProxySendReceive [RPCRT4.@]
469  */
470 void WINAPI NdrProxySendReceive(void *This,
471                                PMIDL_STUB_MESSAGE pStubMsg)
472 {
473   ULONG Status = 0;
474   HRESULT hr;
475
476   TRACE("(%p,%p)\n", This, pStubMsg);
477
478   if (!pStubMsg->pRpcChannelBuffer)
479   {
480     WARN("Trying to use disconnected proxy %p\n", This);
481     RpcRaiseException(RPC_E_DISCONNECTED);
482   }
483
484   pStubMsg->dwStubPhase = PROXY_SENDRECEIVE;
485   /* avoid sending uninitialised parts of the buffer on the wire */
486   pStubMsg->RpcMsg->BufferLength = pStubMsg->Buffer - (unsigned char *)pStubMsg->RpcMsg->Buffer;
487   hr = IRpcChannelBuffer_SendReceive(pStubMsg->pRpcChannelBuffer,
488                                     (RPCOLEMESSAGE*)pStubMsg->RpcMsg,
489                                     &Status);
490   pStubMsg->dwStubPhase = PROXY_UNMARSHAL;
491   pStubMsg->BufferLength = pStubMsg->RpcMsg->BufferLength;
492   pStubMsg->BufferStart = pStubMsg->RpcMsg->Buffer;
493   pStubMsg->BufferEnd = pStubMsg->BufferStart + pStubMsg->BufferLength;
494   pStubMsg->Buffer = pStubMsg->BufferStart;
495
496   /* raise exception if call failed */
497   if (hr == RPC_S_CALL_FAILED) RpcRaiseException(*(DWORD*)pStubMsg->Buffer);
498   else if (FAILED(hr)) RpcRaiseException(hr);
499 }
500
501 /***********************************************************************
502  *           NdrProxyFreeBuffer [RPCRT4.@]
503  */
504 void WINAPI NdrProxyFreeBuffer(void *This,
505                               PMIDL_STUB_MESSAGE pStubMsg)
506 {
507   TRACE("(%p,%p)\n", This, pStubMsg);
508
509   if (pStubMsg->fBufferValid)
510   {
511     IRpcChannelBuffer_FreeBuffer(pStubMsg->pRpcChannelBuffer,
512                                  (RPCOLEMESSAGE*)pStubMsg->RpcMsg);
513     pStubMsg->fBufferValid = TRUE;
514   }
515 }
516
517 /***********************************************************************
518  *           NdrProxyErrorHandler [RPCRT4.@]
519  */
520 HRESULT WINAPI NdrProxyErrorHandler(DWORD dwExceptionCode)
521 {
522   WARN("(0x%08x): a proxy call failed\n", dwExceptionCode);
523
524   if (FAILED(dwExceptionCode))
525     return dwExceptionCode;
526   else
527     return HRESULT_FROM_WIN32(dwExceptionCode);
528 }
529
530 HRESULT WINAPI
531 CreateProxyFromTypeInfo( LPTYPEINFO pTypeInfo, LPUNKNOWN pUnkOuter, REFIID riid,
532                          LPRPCPROXYBUFFER *ppProxy, LPVOID *ppv )
533 {
534     typedef INT (WINAPI *MessageBoxA)(HWND,LPCSTR,LPCSTR,UINT);
535     HMODULE hUser32 = LoadLibraryA("user32");
536     MessageBoxA pMessageBoxA = (void *)GetProcAddress(hUser32, "MessageBoxA");
537
538     FIXME("%p %p %s %p %p\n", pTypeInfo, pUnkOuter, debugstr_guid(riid), ppProxy, ppv);
539     if (pMessageBoxA)
540     {
541         pMessageBoxA(NULL,
542             "The native implementation of OLEAUT32.DLL cannot be used "
543             "with Wine's RPCRT4.DLL. Remove OLEAUT32.DLL and try again.\n",
544             "Wine: Unimplemented CreateProxyFromTypeInfo",
545             0x10);
546         ExitProcess(1);
547     }
548     return E_NOTIMPL;
549 }
550
551 HRESULT WINAPI
552 CreateStubFromTypeInfo(ITypeInfo *pTypeInfo, REFIID riid, IUnknown *pUnkServer,
553                        IRpcStubBuffer **ppStub )
554 {
555     typedef INT (WINAPI *MessageBoxA)(HWND,LPCSTR,LPCSTR,UINT);
556     HMODULE hUser32 = LoadLibraryA("user32");
557     MessageBoxA pMessageBoxA = (void *)GetProcAddress(hUser32, "MessageBoxA");
558
559     FIXME("%p %s %p %p\n", pTypeInfo, debugstr_guid(riid), pUnkServer, ppStub);
560     if (pMessageBoxA)
561     {
562         pMessageBoxA(NULL,
563             "The native implementation of OLEAUT32.DLL cannot be used "
564             "with Wine's RPCRT4.DLL. Remove OLEAUT32.DLL and try again.\n",
565             "Wine: Unimplemented CreateProxyFromTypeInfo",
566             0x10);
567         ExitProcess(1);
568     }
569     return E_NOTIMPL;
570 }