dll/win32/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 "precomp.h"
  25
  26 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  27
  28 /* I don't know what MS's std proxy structure looks like,
  29    so this probably doesn't match, but that shouldn't matter */
  30 typedef struct {
  31   IRpcProxyBuffer IRpcProxyBuffer_iface;
  32   LPVOID *PVtbl;
  33   LONG RefCount;
  34   const IID* piid;
  35   LPUNKNOWN pUnkOuter;
  36   IUnknown *base_object;  /* must be at offset 0x10 from PVtbl */
  37   IRpcProxyBuffer *base_proxy;
  38   PCInterfaceName name;
  39   LPPSFACTORYBUFFER pPSFactory;
  40   LPRPCCHANNELBUFFER pChannel;
  41 } StdProxyImpl;
  42
  43 static const IRpcProxyBufferVtbl StdProxy_Vtbl;
  44
  45 static inline StdProxyImpl *impl_from_IRpcProxyBuffer(IRpcProxyBuffer *iface)
  46 {
  47     return CONTAINING_RECORD(iface, StdProxyImpl, IRpcProxyBuffer_iface);
  48 }
  49
  50 static inline StdProxyImpl *impl_from_proxy_obj( void *iface )
  51 {
  52     return CONTAINING_RECORD(iface, StdProxyImpl, PVtbl);
  53 }
  54
  55 #ifdef __i386__
  56
  57 extern void call_stubless_func(void);
  58 __ASM_GLOBAL_FUNC(call_stubless_func,
  59                   "movl 4(%esp),%ecx\n\t"         /* This pointer */
  60                   "movl (%ecx),%ecx\n\t"          /* This->lpVtbl */
  61                   "movl -8(%ecx),%ecx\n\t"        /* MIDL_STUBLESS_PROXY_INFO */
  62                   "movl 8(%ecx),%edx\n\t"         /* info->FormatStringOffset */
  63                   "movzwl (%edx,%eax,2),%edx\n\t" /* FormatStringOffset[index] */
  64                   "addl 4(%ecx),%edx\n\t"         /* info->ProcFormatString + offset */
  65                   "movzwl 8(%edx),%eax\n\t"       /* arguments size */
  66                   "pushl %eax\n\t"
  67                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  68                   "leal 8(%esp),%eax\n\t"         /* &This */
  69                   "pushl %eax\n\t"
  70                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  71                   "pushl %edx\n\t"                /* format string */
  72                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  73                   "pushl (%ecx)\n\t"              /* info->pStubDesc */
  74                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  75                   "call " __ASM_NAME("ndr_client_call") "\n\t"
  76                   "leal 12(%esp),%esp\n\t"
  77                   __ASM_CFI(".cfi_adjust_cfa_offset -12\n\t")
  78                   "popl %edx\n\t"                 /* arguments size */
  79                   __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
  80                   "movl (%esp),%ecx\n\t"  /* return address */
  81                   "addl %edx,%esp\n\t"
  82                   "jmp *%ecx" );
  83
  84 #include "pshpack1.h"
  85 struct thunk
  86 {
  87   BYTE mov_eax;
  88   DWORD index;
  89   BYTE jmp;
  90   LONG handler;
  91 };
  92 #include "poppack.h"
  93
  94 static inline void init_thunk( struct thunk *thunk, unsigned int index )
  95 {
  96     thunk->mov_eax = 0xb8; /* movl $n,%eax */
  97     thunk->index   = index;
  98     thunk->jmp     = 0xe9; /* jmp */
  99     thunk->handler = (char *)call_stubless_func - (char *)(&thunk->handler + 1);
 100 }
 101
 102 #elif defined(__x86_64__)
 103
 104 extern void call_stubless_func(void);
 105 __ASM_GLOBAL_FUNC(call_stubless_func,
 106                   "movq %rcx,0x8(%rsp)\n\t"
 107                   "movq %rdx,0x10(%rsp)\n\t"
 108                   "movq %r8,0x18(%rsp)\n\t"
 109                   "movq %r9,0x20(%rsp)\n\t"
 110                   "leaq 0x8(%rsp),%r8\n\t"        /* &This */
 111                   "movq (%rcx),%rcx\n\t"          /* This->lpVtbl */
 112                   "movq -0x10(%rcx),%rcx\n\t"     /* MIDL_STUBLESS_PROXY_INFO */
 113                   "movq 0x10(%rcx),%rdx\n\t"      /* info->FormatStringOffset */
 114                   "movzwq (%rdx,%r10,2),%rdx\n\t" /* FormatStringOffset[index] */
 115                   "addq 8(%rcx),%rdx\n\t"         /* info->ProcFormatString + offset */
 116                   "movq (%rcx),%rcx\n\t"          /* info->pStubDesc */
 117                   "subq $0x38,%rsp\n\t"
 118                   __ASM_CFI(".cfi_adjust_cfa_offset 0x38\n\t")
 119                   "movq %xmm1,0x20(%rsp)\n\t"
 120                   "movq %xmm2,0x28(%rsp)\n\t"
 121                   "movq %xmm3,0x30(%rsp)\n\t"
 122                   "leaq 0x18(%rsp),%r9\n\t"       /* fpu_args */
 123                   "call " __ASM_NAME("ndr_client_call") "\n\t"
 124                   "addq $0x38,%rsp\n\t"
 125                   __ASM_CFI(".cfi_adjust_cfa_offset -0x38\n\t")
 126                   "ret" );
 127
 128 #include "pshpack1.h"
 129 struct thunk
 130 {
 131     BYTE mov_r10[3];
 132     DWORD index;
 133     BYTE mov_rax[2];
 134     void *call_stubless;
 135     BYTE jmp_rax[2];
 136 };
 137 #include "poppack.h"
 138
 139 static const struct thunk thunk_template =
 140 {
 141     { 0x49, 0xc7, 0xc2 }, 0,  /* movq $index,%r10 */
 142     { 0x48, 0xb8 }, 0,        /* movq $call_stubless_func,%rax */
 143     { 0xff, 0xe0 }            /* jmp *%rax */
 144 };
 145
 146 static inline void init_thunk( struct thunk *thunk, unsigned int index )
 147 {
 148     *thunk = thunk_template;
 149     thunk->index = index;
 150     thunk->call_stubless = call_stubless_func;
 151 }
 152
 153 #else  /* __i386__ */
 154
 155 #warning You must implement stubless proxies for your CPU
 156
 157 struct thunk
 158 {
 159   DWORD index;
 160 };
 161
 162 static inline void init_thunk( struct thunk *thunk, unsigned int index )
 163 {
 164     thunk->index = index;
 165 }
 166
 167 #endif  /* __i386__ */
 168
 169 #define BLOCK_SIZE 1024
 170 #define MAX_BLOCKS 64  /* 64k methods should be enough for anybody */
 171
 172 static const struct thunk *method_blocks[MAX_BLOCKS];
 173
 174 static const struct thunk *allocate_block( unsigned int num )
 175 {
 176     unsigned int i;
 177     struct thunk *prev, *block;
 178
 179     block = VirtualAlloc( NULL, BLOCK_SIZE * sizeof(*block),
 180                           MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE );
 181     if (!block) return NULL;
 182
 183     for (i = 0; i < BLOCK_SIZE; i++) init_thunk( &block[i], BLOCK_SIZE * num + i + 3 );
 184     VirtualProtect( block, BLOCK_SIZE * sizeof(*block), PAGE_EXECUTE_READ, NULL );
 185     prev = InterlockedCompareExchangePointer( (void **)&method_blocks[num], block, NULL );
 186     if (prev) /* someone beat us to it */
 187     {
 188         VirtualFree( block, 0, MEM_RELEASE );
 189         block = prev;
 190     }
 191     return block;
 192 }
 193
 194 static BOOL fill_stubless_table( IUnknownVtbl *vtbl, DWORD num )
 195 {
 196     const void **entry = (const void **)(vtbl + 1);
 197     DWORD i, j;
 198
 199     if (num - 3 > BLOCK_SIZE * MAX_BLOCKS)
 200     {
 201         FIXME( "%u methods not supported\n", num );
 202         return FALSE;
 203     }
 204     for (i = 0; i < (num - 3 + BLOCK_SIZE - 1) / BLOCK_SIZE; i++)
 205     {
 206         const struct thunk *block = method_blocks[i];
 207         if (!block && !(block = allocate_block( i ))) return FALSE;
 208         for (j = 0; j < BLOCK_SIZE && j < num - 3 - i * BLOCK_SIZE; j++, entry++)
 209             if (*entry == (LPVOID)-1) *entry = &block[j];
 210     }
 211     return TRUE;
 212 }
 213
 214 HRESULT StdProxy_Construct(REFIID riid,
 215                            LPUNKNOWN pUnkOuter,
 216                            const ProxyFileInfo *ProxyInfo,
 217                            int Index,
 218                            LPPSFACTORYBUFFER pPSFactory,
 219                            LPRPCPROXYBUFFER *ppProxy,
 220                            LPVOID *ppvObj)
 221 {
 222   StdProxyImpl *This;
 223   PCInterfaceName name = ProxyInfo->pNamesArray[Index];
 224   CInterfaceProxyVtbl *vtbl = ProxyInfo->pProxyVtblList[Index];
 225
 226   TRACE("(%p,%p,%p,%p,%p) %s\n", pUnkOuter, vtbl, pPSFactory, ppProxy, ppvObj, name);
 227
 228   /* TableVersion = 2 means it is the stubless version of CInterfaceProxyVtbl */
 229   if (ProxyInfo->TableVersion > 1) {
 230     ULONG count = ProxyInfo->pStubVtblList[Index]->header.DispatchTableCount;
 231     vtbl = (CInterfaceProxyVtbl *)((const void **)vtbl + 1);
 232     TRACE("stubless vtbl %p: count=%d\n", vtbl->Vtbl, count );
 233     fill_stubless_table( (IUnknownVtbl *)vtbl->Vtbl, count );
 234   }
 235
 236   if (!IsEqualGUID(vtbl->header.piid, riid)) {
 237     ERR("IID mismatch during proxy creation\n");
 238     return RPC_E_UNEXPECTED;
 239   }
 240
 241   This = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(StdProxyImpl));
 242   if (!This) return E_OUTOFMEMORY;
 243
 244   if (!pUnkOuter) pUnkOuter = (IUnknown *)This;
 245   This->IRpcProxyBuffer_iface.lpVtbl = &StdProxy_Vtbl;
 246   This->PVtbl = vtbl->Vtbl;
 247   /* one reference for the proxy */
 248   This->RefCount = 1;
 249   This->piid = vtbl->header.piid;
 250   This->base_object = NULL;
 251   This->base_proxy = NULL;
 252   This->pUnkOuter = pUnkOuter;
 253   This->name = name;
 254   This->pPSFactory = pPSFactory;
 255   This->pChannel = NULL;
 256
 257   if(ProxyInfo->pDelegatedIIDs && ProxyInfo->pDelegatedIIDs[Index])
 258   {
 259       HRESULT r = create_proxy( ProxyInfo->pDelegatedIIDs[Index], NULL,
 260                                 &This->base_proxy, (void **)&This->base_object );
 261       if (FAILED(r))
 262       {
 263           HeapFree( GetProcessHeap(), 0, This );
 264           return r;
 265       }
 266   }
 267
 268   *ppProxy = &This->IRpcProxyBuffer_iface;
 269   *ppvObj = &This->PVtbl;
 270   IUnknown_AddRef((IUnknown *)*ppvObj);
 271   IPSFactoryBuffer_AddRef(pPSFactory);
 272
 273   TRACE( "iid=%s this %p proxy %p obj %p vtbl %p base proxy %p base obj %p\n",
 274          debugstr_guid(riid), This, *ppProxy, *ppvObj, This->PVtbl, This->base_proxy, This->base_object );
 275   return S_OK;
 276 }
 277
 278 static HRESULT WINAPI StdProxy_QueryInterface(LPRPCPROXYBUFFER iface,
 279                                              REFIID riid,
 280                                              LPVOID *obj)
 281 {
 282   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 283   TRACE("(%p)->QueryInterface(%s,%p)\n",This,debugstr_guid(riid),obj);
 284
 285   if (IsEqualGUID(&IID_IUnknown,riid) ||
 286       IsEqualGUID(This->piid,riid)) {
 287     *obj = &This->PVtbl;
 288     InterlockedIncrement(&This->RefCount);
 289     return S_OK;
 290   }
 291
 292   if (IsEqualGUID(&IID_IRpcProxyBuffer,riid)) {
 293     *obj = &This->IRpcProxyBuffer_iface;
 294     InterlockedIncrement(&This->RefCount);
 295     return S_OK;
 296   }
 297
 298   return E_NOINTERFACE;
 299 }
 300
 301 static ULONG WINAPI StdProxy_AddRef(LPRPCPROXYBUFFER iface)
 302 {
 303   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 304   TRACE("(%p)->AddRef()\n",This);
 305
 306   return InterlockedIncrement(&This->RefCount);
 307 }
 308
 309 static ULONG WINAPI StdProxy_Release(LPRPCPROXYBUFFER iface)
 310 {
 311   ULONG refs;
 312   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 313   TRACE("(%p)->Release()\n",This);
 314
 315   refs = InterlockedDecrement(&This->RefCount);
 316   if (!refs)
 317   {
 318     if (This->pChannel)
 319       IRpcProxyBuffer_Disconnect(&This->IRpcProxyBuffer_iface);
 320
 321     if (This->base_object) IUnknown_Release( This->base_object );
 322     if (This->base_proxy) IRpcProxyBuffer_Release( This->base_proxy );
 323
 324     IPSFactoryBuffer_Release(This->pPSFactory);
 325     HeapFree(GetProcessHeap(),0,This);
 326   }
 327
 328   return refs;
 329 }
 330
 331 static HRESULT WINAPI StdProxy_Connect(LPRPCPROXYBUFFER iface,
 332                                       LPRPCCHANNELBUFFER pChannel)
 333 {
 334   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 335   TRACE("(%p)->Connect(%p)\n",This,pChannel);
 336
 337   This->pChannel = pChannel;
 338   IRpcChannelBuffer_AddRef(pChannel);
 339   if (This->base_proxy) IRpcProxyBuffer_Connect( This->base_proxy, pChannel );
 340   return S_OK;
 341 }
 342
 343 static VOID WINAPI StdProxy_Disconnect(LPRPCPROXYBUFFER iface)
 344 {
 345   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 346   TRACE("(%p)->Disconnect()\n",This);
 347
 348   if (This->base_proxy) IRpcProxyBuffer_Disconnect( This->base_proxy );
 349
 350   IRpcChannelBuffer_Release(This->pChannel);
 351   This->pChannel = NULL;
 352 }
 353
 354 static const IRpcProxyBufferVtbl StdProxy_Vtbl =
 355 {
 356   StdProxy_QueryInterface,
 357   StdProxy_AddRef,
 358   StdProxy_Release,
 359   StdProxy_Connect,
 360   StdProxy_Disconnect
 361 };
 362
 363 static void StdProxy_GetChannel(LPVOID iface,
 364                                    LPRPCCHANNELBUFFER *ppChannel)
 365 {
 366   StdProxyImpl *This = impl_from_proxy_obj( iface );
 367   TRACE("(%p)->GetChannel(%p) %s\n",This,ppChannel,This->name);
 368
 369   *ppChannel = This->pChannel;
 370 }
 371
 372 static void StdProxy_GetIID(LPVOID iface,
 373                                const IID **ppiid)
 374 {
 375   StdProxyImpl *This = impl_from_proxy_obj( iface );
 376   TRACE("(%p)->GetIID(%p) %s\n",This,ppiid,This->name);
 377
 378   *ppiid = This->piid;
 379 }
 380
 381 HRESULT WINAPI IUnknown_QueryInterface_Proxy(LPUNKNOWN iface,
 382                                             REFIID riid,
 383                                             LPVOID *ppvObj)
 384 {
 385   StdProxyImpl *This = impl_from_proxy_obj( iface );
 386   TRACE("(%p)->QueryInterface(%s,%p) %s\n",This,debugstr_guid(riid),ppvObj,This->name);
 387   return IUnknown_QueryInterface(This->pUnkOuter,riid,ppvObj);
 388 }
 389
 390 ULONG WINAPI IUnknown_AddRef_Proxy(LPUNKNOWN iface)
 391 {
 392   StdProxyImpl *This = impl_from_proxy_obj( iface );
 393   TRACE("(%p)->AddRef() %s\n",This,This->name);
 394   return IUnknown_AddRef(This->pUnkOuter);
 395 }
 396
 397 ULONG WINAPI IUnknown_Release_Proxy(LPUNKNOWN iface)
 398 {
 399   StdProxyImpl *This = impl_from_proxy_obj( iface );
 400   TRACE("(%p)->Release() %s\n",This,This->name);
 401   return IUnknown_Release(This->pUnkOuter);
 402 }
 403
 404 /***********************************************************************
 405  *           NdrProxyInitialize [RPCRT4.@]
 406  */
 407 void WINAPI NdrProxyInitialize(void *This,
 408                               PRPC_MESSAGE pRpcMsg,
 409                               PMIDL_STUB_MESSAGE pStubMsg,
 410                               PMIDL_STUB_DESC pStubDescriptor,
 411                               unsigned int ProcNum)
 412 {
 413   TRACE("(%p,%p,%p,%p,%d)\n", This, pRpcMsg, pStubMsg, pStubDescriptor, ProcNum);
 414   NdrClientInitializeNew(pRpcMsg, pStubMsg, pStubDescriptor, ProcNum);
 415   StdProxy_GetChannel(This, &pStubMsg->pRpcChannelBuffer);
 416   IRpcChannelBuffer_GetDestCtx(pStubMsg->pRpcChannelBuffer,
 417                                &pStubMsg->dwDestContext,
 418                                &pStubMsg->pvDestContext);
 419   TRACE("channel=%p\n", pStubMsg->pRpcChannelBuffer);
 420 }
 421
 422 /***********************************************************************
 423  *           NdrProxyGetBuffer [RPCRT4.@]
 424  */
 425 void WINAPI NdrProxyGetBuffer(void *This,
 426                              PMIDL_STUB_MESSAGE pStubMsg)
 427 {
 428   HRESULT hr;
 429   const IID *riid = NULL;
 430
 431   TRACE("(%p,%p)\n", This, pStubMsg);
 432   pStubMsg->RpcMsg->BufferLength = pStubMsg->BufferLength;
 433   pStubMsg->dwStubPhase = PROXY_GETBUFFER;
 434   StdProxy_GetIID(This, &riid);
 435   hr = IRpcChannelBuffer_GetBuffer(pStubMsg->pRpcChannelBuffer,
 436                                   (RPCOLEMESSAGE*)pStubMsg->RpcMsg,
 437                                   riid);
 438   if (FAILED(hr))
 439   {
 440     RpcRaiseException(hr);
 441     return;
 442   }
 443   pStubMsg->fBufferValid = TRUE;
 444   pStubMsg->BufferStart = pStubMsg->RpcMsg->Buffer;
 445   pStubMsg->BufferEnd = pStubMsg->BufferStart + pStubMsg->BufferLength;
 446   pStubMsg->Buffer = pStubMsg->BufferStart;
 447   pStubMsg->dwStubPhase = PROXY_MARSHAL;
 448 }
 449
 450 /***********************************************************************
 451  *           NdrProxySendReceive [RPCRT4.@]
 452  */
 453 void WINAPI NdrProxySendReceive(void *This,
 454                                PMIDL_STUB_MESSAGE pStubMsg)
 455 {
 456   ULONG Status = 0;
 457   HRESULT hr;
 458
 459   TRACE("(%p,%p)\n", This, pStubMsg);
 460
 461   if (!pStubMsg->pRpcChannelBuffer)
 462   {
 463     WARN("Trying to use disconnected proxy %p\n", This);
 464     RpcRaiseException(RPC_E_DISCONNECTED);
 465   }
 466
 467   pStubMsg->dwStubPhase = PROXY_SENDRECEIVE;
 468   /* avoid sending uninitialised parts of the buffer on the wire */
 469   pStubMsg->RpcMsg->BufferLength = pStubMsg->Buffer - (unsigned char *)pStubMsg->RpcMsg->Buffer;
 470   hr = IRpcChannelBuffer_SendReceive(pStubMsg->pRpcChannelBuffer,
 471                                     (RPCOLEMESSAGE*)pStubMsg->RpcMsg,
 472                                     &Status);
 473   pStubMsg->dwStubPhase = PROXY_UNMARSHAL;
 474   pStubMsg->BufferLength = pStubMsg->RpcMsg->BufferLength;
 475   pStubMsg->BufferStart = pStubMsg->RpcMsg->Buffer;
 476   pStubMsg->BufferEnd = pStubMsg->BufferStart + pStubMsg->BufferLength;
 477   pStubMsg->Buffer = pStubMsg->BufferStart;
 478
 479   /* raise exception if call failed */
 480   if (hr == RPC_S_CALL_FAILED) RpcRaiseException(*(DWORD*)pStubMsg->Buffer);
 481   else if (FAILED(hr)) RpcRaiseException(hr);
 482 }
 483
 484 /***********************************************************************
 485  *           NdrProxyFreeBuffer [RPCRT4.@]
 486  */
 487 void WINAPI NdrProxyFreeBuffer(void *This,
 488                               PMIDL_STUB_MESSAGE pStubMsg)
 489 {
 490   TRACE("(%p,%p)\n", This, pStubMsg);
 491
 492   if (pStubMsg->fBufferValid)
 493   {
 494     IRpcChannelBuffer_FreeBuffer(pStubMsg->pRpcChannelBuffer,
 495                                  (RPCOLEMESSAGE*)pStubMsg->RpcMsg);
 496     pStubMsg->fBufferValid = TRUE;
 497   }
 498 }
 499
 500 /***********************************************************************
 501  *           NdrProxyErrorHandler [RPCRT4.@]
 502  */
 503 HRESULT WINAPI NdrProxyErrorHandler(DWORD dwExceptionCode)
 504 {
 505   WARN("(0x%08x): a proxy call failed\n", dwExceptionCode);
 506
 507   if (FAILED(dwExceptionCode))
 508     return dwExceptionCode;
 509   else
 510     return HRESULT_FROM_WIN32(dwExceptionCode);
 511 }
 512
 513 HRESULT WINAPI
 514 CreateProxyFromTypeInfo( LPTYPEINFO pTypeInfo, LPUNKNOWN pUnkOuter, REFIID riid,
 515                          LPRPCPROXYBUFFER *ppProxy, LPVOID *ppv )
 516 {
 517     typedef INT (WINAPI *MessageBoxA)(HWND,LPCSTR,LPCSTR,UINT);
 518     HMODULE hUser32 = LoadLibraryA("user32");
 519     MessageBoxA pMessageBoxA = (void *)GetProcAddress(hUser32, "MessageBoxA");
 520
 521     FIXME("%p %p %s %p %p\n", pTypeInfo, pUnkOuter, debugstr_guid(riid), ppProxy, ppv);
 522     if (pMessageBoxA)
 523     {
 524         pMessageBoxA(NULL,
 525             "The native implementation of OLEAUT32.DLL cannot be used "
 526             "with Wine's RPCRT4.DLL. Remove OLEAUT32.DLL and try again.\n",
 527             "Wine: Unimplemented CreateProxyFromTypeInfo",
 528             0x10);
 529         ExitProcess(1);
 530     }
 531     return E_NOTIMPL;
 532 }
 533
 534 HRESULT WINAPI
 535 CreateStubFromTypeInfo(ITypeInfo *pTypeInfo, REFIID riid, IUnknown *pUnkServer,
 536                        IRpcStubBuffer **ppStub )
 537 {
 538     typedef INT (WINAPI *MessageBoxA)(HWND,LPCSTR,LPCSTR,UINT);
 539     HMODULE hUser32 = LoadLibraryA("user32");
 540     MessageBoxA pMessageBoxA = (void *)GetProcAddress(hUser32, "MessageBoxA");
 541
 542     FIXME("%p %s %p %p\n", pTypeInfo, debugstr_guid(riid), pUnkServer, ppStub);
 543     if (pMessageBoxA)
 544     {
 545         pMessageBoxA(NULL,
 546             "The native implementation of OLEAUT32.DLL cannot be used "
 547             "with Wine's RPCRT4.DLL. Remove OLEAUT32.DLL and try again.\n",
 548             "Wine: Unimplemented CreateProxyFromTypeInfo",
 549             0x10);
 550         ExitProcess(1);
 551     }
 552     return E_NOTIMPL;
 553 }