git.oblomov.eu Git - wine/blob - 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 $0x28,%rsp\n\t"
 135                   __ASM_CFI(".cfi_adjust_cfa_offset 0x28\n\t")
 136                   "call " __ASM_NAME("ndr_client_call") "\n\t"
 137                   "addq $0x28,%rsp\n\t"
 138                   __ASM_CFI(".cfi_adjust_cfa_offset -0x28\n\t")
 139                   "ret" );
 140
 141 #include "pshpack1.h"
 142 struct thunk
 143 {
 144     BYTE mov_r10[3];
 145     DWORD index;
 146     BYTE mov_rax[2];
 147     void *call_stubless;
 148     BYTE jmp_rax[2];
 149 };
 150 #include "poppack.h"
 151
 152 static const struct thunk thunk_template =
 153 {
 154     { 0x49, 0xc7, 0xc2 }, 0,  /* movq $index,%r10 */
 155     { 0x48, 0xb8 }, 0,        /* movq $call_stubless_func,%rax */
 156     { 0xff, 0xe0 }            /* jmp *%rax */
 157 };
 158
 159 static inline void init_thunk( struct thunk *thunk, unsigned int index )
 160 {
 161     *thunk = thunk_template;
 162     thunk->index = index;
 163     thunk->call_stubless = call_stubless_func;
 164 }
 165
 166 #else  /* __i386__ */
 167
 168 #warning You must implement stubless proxies for your CPU
 169
 170 struct thunk
 171 {
 172   DWORD index;
 173 };
 174
 175 static inline void init_thunk( struct thunk *thunk, unsigned int index )
 176 {
 177     thunk->index = index;
 178 }
 179
 180 #endif  /* __i386__ */
 181
 182 #define BLOCK_SIZE 1024
 183 #define MAX_BLOCKS 64  /* 64k methods should be enough for anybody */
 184
 185 static const struct thunk *method_blocks[MAX_BLOCKS];
 186
 187 static const struct thunk *allocate_block( unsigned int num )
 188 {
 189     unsigned int i;
 190     struct thunk *prev, *block;
 191
 192     block = VirtualAlloc( NULL, BLOCK_SIZE * sizeof(*block),
 193                           MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE );
 194     if (!block) return NULL;
 195
 196     for (i = 0; i < BLOCK_SIZE; i++) init_thunk( &block[i], BLOCK_SIZE * num + i + 3 );
 197     VirtualProtect( block, BLOCK_SIZE * sizeof(*block), PAGE_EXECUTE_READ, NULL );
 198     prev = InterlockedCompareExchangePointer( (void **)&method_blocks[num], block, NULL );
 199     if (prev) /* someone beat us to it */
 200     {
 201         VirtualFree( block, 0, MEM_RELEASE );
 202         block = prev;
 203     }
 204     return block;
 205 }
 206
 207 static BOOL fill_stubless_table( IUnknownVtbl *vtbl, DWORD num )
 208 {
 209     const void **entry = (const void **)(vtbl + 1);
 210     DWORD i, j;
 211
 212     if (num - 3 > BLOCK_SIZE * MAX_BLOCKS)
 213     {
 214         FIXME( "%u methods not supported\n", num );
 215         return FALSE;
 216     }
 217     for (i = 0; i < (num - 3 + BLOCK_SIZE - 1) / BLOCK_SIZE; i++)
 218     {
 219         const struct thunk *block = method_blocks[i];
 220         if (!block && !(block = allocate_block( i ))) return FALSE;
 221         for (j = 0; j < BLOCK_SIZE && j < num - 3 - i * BLOCK_SIZE; j++, entry++)
 222             if (*entry == (LPVOID)-1) *entry = &block[j];
 223     }
 224     return TRUE;
 225 }
 226
 227 HRESULT StdProxy_Construct(REFIID riid,
 228                            LPUNKNOWN pUnkOuter,
 229                            const ProxyFileInfo *ProxyInfo,
 230                            int Index,
 231                            LPPSFACTORYBUFFER pPSFactory,
 232                            LPRPCPROXYBUFFER *ppProxy,
 233                            LPVOID *ppvObj)
 234 {
 235   StdProxyImpl *This;
 236   PCInterfaceName name = ProxyInfo->pNamesArray[Index];
 237   CInterfaceProxyVtbl *vtbl = ProxyInfo->pProxyVtblList[Index];
 238
 239   TRACE("(%p,%p,%p,%p,%p) %s\n", pUnkOuter, vtbl, pPSFactory, ppProxy, ppvObj, name);
 240
 241   /* TableVersion = 2 means it is the stubless version of CInterfaceProxyVtbl */
 242   if (ProxyInfo->TableVersion > 1) {
 243     ULONG count = ProxyInfo->pStubVtblList[Index]->header.DispatchTableCount;
 244     vtbl = (CInterfaceProxyVtbl *)((const void **)vtbl + 1);
 245     TRACE("stubless vtbl %p: count=%d\n", vtbl->Vtbl, count );
 246     fill_stubless_table( (IUnknownVtbl *)vtbl->Vtbl, count );
 247   }
 248
 249   if (!IsEqualGUID(vtbl->header.piid, riid)) {
 250     ERR("IID mismatch during proxy creation\n");
 251     return RPC_E_UNEXPECTED;
 252   }
 253
 254   This = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(StdProxyImpl));
 255   if (!This) return E_OUTOFMEMORY;
 256
 257   if (!pUnkOuter) pUnkOuter = (IUnknown *)This;
 258   This->IRpcProxyBuffer_iface.lpVtbl = &StdProxy_Vtbl;
 259   This->PVtbl = vtbl->Vtbl;
 260   /* one reference for the proxy */
 261   This->RefCount = 1;
 262   This->piid = vtbl->header.piid;
 263   This->base_object = NULL;
 264   This->base_proxy = NULL;
 265   This->pUnkOuter = pUnkOuter;
 266   This->name = name;
 267   This->pPSFactory = pPSFactory;
 268   This->pChannel = NULL;
 269
 270   if(ProxyInfo->pDelegatedIIDs && ProxyInfo->pDelegatedIIDs[Index])
 271   {
 272       HRESULT r = create_proxy( ProxyInfo->pDelegatedIIDs[Index], NULL,
 273                                 &This->base_proxy, (void **)&This->base_object );
 274       if (FAILED(r))
 275       {
 276           HeapFree( GetProcessHeap(), 0, This );
 277           return r;
 278       }
 279   }
 280
 281   *ppProxy = &This->IRpcProxyBuffer_iface;
 282   *ppvObj = &This->PVtbl;
 283   IUnknown_AddRef((IUnknown *)*ppvObj);
 284   IPSFactoryBuffer_AddRef(pPSFactory);
 285
 286   TRACE( "iid=%s this %p proxy %p obj %p vtbl %p base proxy %p base obj %p\n",
 287          debugstr_guid(riid), This, *ppProxy, *ppvObj, This->PVtbl, This->base_proxy, This->base_object );
 288   return S_OK;
 289 }
 290
 291 static HRESULT WINAPI StdProxy_QueryInterface(LPRPCPROXYBUFFER iface,
 292                                              REFIID riid,
 293                                              LPVOID *obj)
 294 {
 295   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 296   TRACE("(%p)->QueryInterface(%s,%p)\n",This,debugstr_guid(riid),obj);
 297
 298   if (IsEqualGUID(&IID_IUnknown,riid) ||
 299       IsEqualGUID(This->piid,riid)) {
 300     *obj = &This->PVtbl;
 301     InterlockedIncrement(&This->RefCount);
 302     return S_OK;
 303   }
 304
 305   if (IsEqualGUID(&IID_IRpcProxyBuffer,riid)) {
 306     *obj = &This->IRpcProxyBuffer_iface;
 307     InterlockedIncrement(&This->RefCount);
 308     return S_OK;
 309   }
 310
 311   return E_NOINTERFACE;
 312 }
 313
 314 static ULONG WINAPI StdProxy_AddRef(LPRPCPROXYBUFFER iface)
 315 {
 316   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 317   TRACE("(%p)->AddRef()\n",This);
 318
 319   return InterlockedIncrement(&This->RefCount);
 320 }
 321
 322 static ULONG WINAPI StdProxy_Release(LPRPCPROXYBUFFER iface)
 323 {
 324   ULONG refs;
 325   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 326   TRACE("(%p)->Release()\n",This);
 327
 328   refs = InterlockedDecrement(&This->RefCount);
 329   if (!refs)
 330   {
 331     if (This->pChannel)
 332       IRpcProxyBuffer_Disconnect(&This->IRpcProxyBuffer_iface);
 333
 334     if (This->base_object) IUnknown_Release( This->base_object );
 335     if (This->base_proxy) IRpcProxyBuffer_Release( This->base_proxy );
 336
 337     IPSFactoryBuffer_Release(This->pPSFactory);
 338     HeapFree(GetProcessHeap(),0,This);
 339   }
 340
 341   return refs;
 342 }
 343
 344 static HRESULT WINAPI StdProxy_Connect(LPRPCPROXYBUFFER iface,
 345                                       LPRPCCHANNELBUFFER pChannel)
 346 {
 347   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 348   TRACE("(%p)->Connect(%p)\n",This,pChannel);
 349
 350   This->pChannel = pChannel;
 351   IRpcChannelBuffer_AddRef(pChannel);
 352   if (This->base_proxy) IRpcProxyBuffer_Connect( This->base_proxy, pChannel );
 353   return S_OK;
 354 }
 355
 356 static VOID WINAPI StdProxy_Disconnect(LPRPCPROXYBUFFER iface)
 357 {
 358   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 359   TRACE("(%p)->Disconnect()\n",This);
 360
 361   if (This->base_proxy) IRpcProxyBuffer_Disconnect( This->base_proxy );
 362
 363   IRpcChannelBuffer_Release(This->pChannel);
 364   This->pChannel = NULL;
 365 }
 366
 367 static const IRpcProxyBufferVtbl StdProxy_Vtbl =
 368 {
 369   StdProxy_QueryInterface,
 370   StdProxy_AddRef,
 371   StdProxy_Release,
 372   StdProxy_Connect,
 373   StdProxy_Disconnect
 374 };
 375
 376 static void StdProxy_GetChannel(LPVOID iface,
 377                                    LPRPCCHANNELBUFFER *ppChannel)
 378 {
 379   StdProxyImpl *This = impl_from_proxy_obj( iface );
 380   TRACE("(%p)->GetChannel(%p) %s\n",This,ppChannel,This->name);
 381
 382   *ppChannel = This->pChannel;
 383 }
 384
 385 static void StdProxy_GetIID(LPVOID iface,
 386                                const IID **ppiid)
 387 {
 388   StdProxyImpl *This = impl_from_proxy_obj( iface );
 389   TRACE("(%p)->GetIID(%p) %s\n",This,ppiid,This->name);
 390
 391   *ppiid = This->piid;
 392 }
 393
 394 HRESULT WINAPI IUnknown_QueryInterface_Proxy(LPUNKNOWN iface,
 395                                             REFIID riid,
 396                                             LPVOID *ppvObj)
 397 {
 398   StdProxyImpl *This = impl_from_proxy_obj( iface );
 399   TRACE("(%p)->QueryInterface(%s,%p) %s\n",This,debugstr_guid(riid),ppvObj,This->name);
 400   return IUnknown_QueryInterface(This->pUnkOuter,riid,ppvObj);
 401 }
 402
 403 ULONG WINAPI IUnknown_AddRef_Proxy(LPUNKNOWN iface)
 404 {
 405   StdProxyImpl *This = impl_from_proxy_obj( iface );
 406   TRACE("(%p)->AddRef() %s\n",This,This->name);
 407   return IUnknown_AddRef(This->pUnkOuter);
 408 }
 409
 410 ULONG WINAPI IUnknown_Release_Proxy(LPUNKNOWN iface)
 411 {
 412   StdProxyImpl *This = impl_from_proxy_obj( iface );
 413   TRACE("(%p)->Release() %s\n",This,This->name);
 414   return IUnknown_Release(This->pUnkOuter);
 415 }
 416
 417 /***********************************************************************
 418  *           NdrProxyInitialize [RPCRT4.@]
 419  */
 420 void WINAPI NdrProxyInitialize(void *This,
 421                               PRPC_MESSAGE pRpcMsg,
 422                               PMIDL_STUB_MESSAGE pStubMsg,
 423                               PMIDL_STUB_DESC pStubDescriptor,
 424                               unsigned int ProcNum)
 425 {
 426   TRACE("(%p,%p,%p,%p,%d)\n", This, pRpcMsg, pStubMsg, pStubDescriptor, ProcNum);
 427   NdrClientInitializeNew(pRpcMsg, pStubMsg, pStubDescriptor, ProcNum);
 428   StdProxy_GetChannel(This, &pStubMsg->pRpcChannelBuffer);
 429   IRpcChannelBuffer_GetDestCtx(pStubMsg->pRpcChannelBuffer,
 430                                &pStubMsg->dwDestContext,
 431                                &pStubMsg->pvDestContext);
 432   TRACE("channel=%p\n", pStubMsg->pRpcChannelBuffer);
 433 }
 434
 435 /***********************************************************************
 436  *           NdrProxyGetBuffer [RPCRT4.@]
 437  */
 438 void WINAPI NdrProxyGetBuffer(void *This,
 439                              PMIDL_STUB_MESSAGE pStubMsg)
 440 {
 441   HRESULT hr;
 442   const IID *riid = NULL;
 443
 444   TRACE("(%p,%p)\n", This, pStubMsg);
 445   pStubMsg->RpcMsg->BufferLength = pStubMsg->BufferLength;
 446   pStubMsg->dwStubPhase = PROXY_GETBUFFER;
 447   StdProxy_GetIID(This, &riid);
 448   hr = IRpcChannelBuffer_GetBuffer(pStubMsg->pRpcChannelBuffer,
 449                                   (RPCOLEMESSAGE*)pStubMsg->RpcMsg,
 450                                   riid);
 451   if (FAILED(hr))
 452   {
 453     RpcRaiseException(hr);
 454     return;
 455   }
 456   pStubMsg->fBufferValid = TRUE;
 457   pStubMsg->BufferStart = pStubMsg->RpcMsg->Buffer;
 458   pStubMsg->BufferEnd = pStubMsg->BufferStart + pStubMsg->BufferLength;
 459   pStubMsg->Buffer = pStubMsg->BufferStart;
 460   pStubMsg->dwStubPhase = PROXY_MARSHAL;
 461 }
 462
 463 /***********************************************************************
 464  *           NdrProxySendReceive [RPCRT4.@]
 465  */
 466 void WINAPI NdrProxySendReceive(void *This,
 467                                PMIDL_STUB_MESSAGE pStubMsg)
 468 {
 469   ULONG Status = 0;
 470   HRESULT hr;
 471
 472   TRACE("(%p,%p)\n", This, pStubMsg);
 473
 474   if (!pStubMsg->pRpcChannelBuffer)
 475   {
 476     WARN("Trying to use disconnected proxy %p\n", This);
 477     RpcRaiseException(RPC_E_DISCONNECTED);
 478   }
 479
 480   pStubMsg->dwStubPhase = PROXY_SENDRECEIVE;
 481   /* avoid sending uninitialised parts of the buffer on the wire */
 482   pStubMsg->RpcMsg->BufferLength = pStubMsg->Buffer - (unsigned char *)pStubMsg->RpcMsg->Buffer;
 483   hr = IRpcChannelBuffer_SendReceive(pStubMsg->pRpcChannelBuffer,
 484                                     (RPCOLEMESSAGE*)pStubMsg->RpcMsg,
 485                                     &Status);
 486   pStubMsg->dwStubPhase = PROXY_UNMARSHAL;
 487   pStubMsg->BufferLength = pStubMsg->RpcMsg->BufferLength;
 488   pStubMsg->BufferStart = pStubMsg->RpcMsg->Buffer;
 489   pStubMsg->BufferEnd = pStubMsg->BufferStart + pStubMsg->BufferLength;
 490   pStubMsg->Buffer = pStubMsg->BufferStart;
 491
 492   /* raise exception if call failed */
 493   if (hr == RPC_S_CALL_FAILED) RpcRaiseException(*(DWORD*)pStubMsg->Buffer);
 494   else if (FAILED(hr)) RpcRaiseException(hr);
 495 }
 496
 497 /***********************************************************************
 498  *           NdrProxyFreeBuffer [RPCRT4.@]
 499  */
 500 void WINAPI NdrProxyFreeBuffer(void *This,
 501                               PMIDL_STUB_MESSAGE pStubMsg)
 502 {
 503   TRACE("(%p,%p)\n", This, pStubMsg);
 504
 505   if (pStubMsg->fBufferValid)
 506   {
 507     IRpcChannelBuffer_FreeBuffer(pStubMsg->pRpcChannelBuffer,
 508                                  (RPCOLEMESSAGE*)pStubMsg->RpcMsg);
 509     pStubMsg->fBufferValid = TRUE;
 510   }
 511 }
 512
 513 /***********************************************************************
 514  *           NdrProxyErrorHandler [RPCRT4.@]
 515  */
 516 HRESULT WINAPI NdrProxyErrorHandler(DWORD dwExceptionCode)
 517 {
 518   WARN("(0x%08x): a proxy call failed\n", dwExceptionCode);
 519
 520   if (FAILED(dwExceptionCode))
 521     return dwExceptionCode;
 522   else
 523     return HRESULT_FROM_WIN32(dwExceptionCode);
 524 }
 525
 526 HRESULT WINAPI
 527 CreateProxyFromTypeInfo( LPTYPEINFO pTypeInfo, LPUNKNOWN pUnkOuter, REFIID riid,
 528                          LPRPCPROXYBUFFER *ppProxy, LPVOID *ppv )
 529 {
 530     typedef INT (WINAPI *MessageBoxA)(HWND,LPCSTR,LPCSTR,UINT);
 531     HMODULE hUser32 = LoadLibraryA("user32");
 532     MessageBoxA pMessageBoxA = (void *)GetProcAddress(hUser32, "MessageBoxA");
 533
 534     FIXME("%p %p %s %p %p\n", pTypeInfo, pUnkOuter, debugstr_guid(riid), ppProxy, ppv);
 535     if (pMessageBoxA)
 536     {
 537         pMessageBoxA(NULL,
 538             "The native implementation of OLEAUT32.DLL cannot be used "
 539             "with Wine's RPCRT4.DLL. Remove OLEAUT32.DLL and try again.\n",
 540             "Wine: Unimplemented CreateProxyFromTypeInfo",
 541             0x10);
 542         ExitProcess(1);
 543     }
 544     return E_NOTIMPL;
 545 }
 546
 547 HRESULT WINAPI
 548 CreateStubFromTypeInfo(ITypeInfo *pTypeInfo, REFIID riid, IUnknown *pUnkServer,
 549                        IRpcStubBuffer **ppStub )
 550 {
 551     typedef INT (WINAPI *MessageBoxA)(HWND,LPCSTR,LPCSTR,UINT);
 552     HMODULE hUser32 = LoadLibraryA("user32");
 553     MessageBoxA pMessageBoxA = (void *)GetProcAddress(hUser32, "MessageBoxA");
 554
 555     FIXME("%p %s %p %p\n", pTypeInfo, debugstr_guid(riid), pUnkServer, ppStub);
 556     if (pMessageBoxA)
 557     {
 558         pMessageBoxA(NULL,
 559             "The native implementation of OLEAUT32.DLL cannot be used "
 560             "with Wine's RPCRT4.DLL. Remove OLEAUT32.DLL and try again.\n",
 561             "Wine: Unimplemented CreateProxyFromTypeInfo",
 562             0x10);
 563         ExitProcess(1);
 564     }
 565     return E_NOTIMPL;
 566 }