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     DWORD oldprot;
 196
 197     block = VirtualAlloc( NULL, BLOCK_SIZE * sizeof(*block),
 198                           MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE );
 199     if (!block) return NULL;
 200
 201     for (i = 0; i < BLOCK_SIZE; i++) init_thunk( &block[i], BLOCK_SIZE * num + i + 3 );
 202     VirtualProtect( block, BLOCK_SIZE * sizeof(*block), PAGE_EXECUTE_READ, &oldprot );
 203     prev = InterlockedCompareExchangePointer( (void **)&method_blocks[num], block, NULL );
 204     if (prev) /* someone beat us to it */
 205     {
 206         VirtualFree( block, 0, MEM_RELEASE );
 207         block = prev;
 208     }
 209     return block;
 210 }
 211
 212 static BOOL fill_stubless_table( IUnknownVtbl *vtbl, DWORD num )
 213 {
 214     const void **entry = (const void **)(vtbl + 1);
 215     DWORD i, j;
 216
 217     if (num - 3 > BLOCK_SIZE * MAX_BLOCKS)
 218     {
 219         FIXME( "%u methods not supported\n", num );
 220         return FALSE;
 221     }
 222     for (i = 0; i < (num - 3 + BLOCK_SIZE - 1) / BLOCK_SIZE; i++)
 223     {
 224         const struct thunk *block = method_blocks[i];
 225         if (!block && !(block = allocate_block( i ))) return FALSE;
 226         for (j = 0; j < BLOCK_SIZE && j < num - 3 - i * BLOCK_SIZE; j++, entry++)
 227             if (*entry == (LPVOID)-1) *entry = &block[j];
 228     }
 229     return TRUE;
 230 }
 231
 232 HRESULT StdProxy_Construct(REFIID riid,
 233                            LPUNKNOWN pUnkOuter,
 234                            const ProxyFileInfo *ProxyInfo,
 235                            int Index,
 236                            LPPSFACTORYBUFFER pPSFactory,
 237                            LPRPCPROXYBUFFER *ppProxy,
 238                            LPVOID *ppvObj)
 239 {
 240   StdProxyImpl *This;
 241   PCInterfaceName name = ProxyInfo->pNamesArray[Index];
 242   CInterfaceProxyVtbl *vtbl = ProxyInfo->pProxyVtblList[Index];
 243
 244   TRACE("(%p,%p,%p,%p,%p) %s\n", pUnkOuter, vtbl, pPSFactory, ppProxy, ppvObj, name);
 245
 246   /* TableVersion = 2 means it is the stubless version of CInterfaceProxyVtbl */
 247   if (ProxyInfo->TableVersion > 1) {
 248     ULONG count = ProxyInfo->pStubVtblList[Index]->header.DispatchTableCount;
 249     vtbl = (CInterfaceProxyVtbl *)((const void **)vtbl + 1);
 250     TRACE("stubless vtbl %p: count=%d\n", vtbl->Vtbl, count );
 251     fill_stubless_table( (IUnknownVtbl *)vtbl->Vtbl, count );
 252   }
 253
 254   if (!IsEqualGUID(vtbl->header.piid, riid)) {
 255     ERR("IID mismatch during proxy creation\n");
 256     return RPC_E_UNEXPECTED;
 257   }
 258
 259   This = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(StdProxyImpl));
 260   if (!This) return E_OUTOFMEMORY;
 261
 262   if (!pUnkOuter) pUnkOuter = (IUnknown *)This;
 263   This->IRpcProxyBuffer_iface.lpVtbl = &StdProxy_Vtbl;
 264   This->PVtbl = vtbl->Vtbl;
 265   /* one reference for the proxy */
 266   This->RefCount = 1;
 267   This->piid = vtbl->header.piid;
 268   This->base_object = NULL;
 269   This->base_proxy = NULL;
 270   This->pUnkOuter = pUnkOuter;
 271   This->name = name;
 272   This->pPSFactory = pPSFactory;
 273   This->pChannel = NULL;
 274
 275   if(ProxyInfo->pDelegatedIIDs && ProxyInfo->pDelegatedIIDs[Index])
 276   {
 277       HRESULT r = create_proxy( ProxyInfo->pDelegatedIIDs[Index], NULL,
 278                                 &This->base_proxy, (void **)&This->base_object );
 279       if (FAILED(r))
 280       {
 281           HeapFree( GetProcessHeap(), 0, This );
 282           return r;
 283       }
 284   }
 285
 286   *ppProxy = &This->IRpcProxyBuffer_iface;
 287   *ppvObj = &This->PVtbl;
 288   IUnknown_AddRef((IUnknown *)*ppvObj);
 289   IPSFactoryBuffer_AddRef(pPSFactory);
 290
 291   TRACE( "iid=%s this %p proxy %p obj %p vtbl %p base proxy %p base obj %p\n",
 292          debugstr_guid(riid), This, *ppProxy, *ppvObj, This->PVtbl, This->base_proxy, This->base_object );
 293   return S_OK;
 294 }
 295
 296 static HRESULT WINAPI StdProxy_QueryInterface(LPRPCPROXYBUFFER iface,
 297                                              REFIID riid,
 298                                              LPVOID *obj)
 299 {
 300   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 301   TRACE("(%p)->QueryInterface(%s,%p)\n",This,debugstr_guid(riid),obj);
 302
 303   if (IsEqualGUID(&IID_IUnknown,riid) ||
 304       IsEqualGUID(This->piid,riid)) {
 305     *obj = &This->PVtbl;
 306     InterlockedIncrement(&This->RefCount);
 307     return S_OK;
 308   }
 309
 310   if (IsEqualGUID(&IID_IRpcProxyBuffer,riid)) {
 311     *obj = &This->IRpcProxyBuffer_iface;
 312     InterlockedIncrement(&This->RefCount);
 313     return S_OK;
 314   }
 315
 316   return E_NOINTERFACE;
 317 }
 318
 319 static ULONG WINAPI StdProxy_AddRef(LPRPCPROXYBUFFER iface)
 320 {
 321   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 322   TRACE("(%p)->AddRef()\n",This);
 323
 324   return InterlockedIncrement(&This->RefCount);
 325 }
 326
 327 static ULONG WINAPI StdProxy_Release(LPRPCPROXYBUFFER iface)
 328 {
 329   ULONG refs;
 330   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 331   TRACE("(%p)->Release()\n",This);
 332
 333   refs = InterlockedDecrement(&This->RefCount);
 334   if (!refs)
 335   {
 336     if (This->pChannel)
 337       IRpcProxyBuffer_Disconnect(&This->IRpcProxyBuffer_iface);
 338
 339     if (This->base_object) IUnknown_Release( This->base_object );
 340     if (This->base_proxy) IRpcProxyBuffer_Release( This->base_proxy );
 341
 342     IPSFactoryBuffer_Release(This->pPSFactory);
 343     HeapFree(GetProcessHeap(),0,This);
 344   }
 345
 346   return refs;
 347 }
 348
 349 static HRESULT WINAPI StdProxy_Connect(LPRPCPROXYBUFFER iface,
 350                                       LPRPCCHANNELBUFFER pChannel)
 351 {
 352   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 353   TRACE("(%p)->Connect(%p)\n",This,pChannel);
 354
 355   This->pChannel = pChannel;
 356   IRpcChannelBuffer_AddRef(pChannel);
 357   if (This->base_proxy) IRpcProxyBuffer_Connect( This->base_proxy, pChannel );
 358   return S_OK;
 359 }
 360
 361 static VOID WINAPI StdProxy_Disconnect(LPRPCPROXYBUFFER iface)
 362 {
 363   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 364   TRACE("(%p)->Disconnect()\n",This);
 365
 366   if (This->base_proxy) IRpcProxyBuffer_Disconnect( This->base_proxy );
 367
 368   IRpcChannelBuffer_Release(This->pChannel);
 369   This->pChannel = NULL;
 370 }
 371
 372 static const IRpcProxyBufferVtbl StdProxy_Vtbl =
 373 {
 374   StdProxy_QueryInterface,
 375   StdProxy_AddRef,
 376   StdProxy_Release,
 377   StdProxy_Connect,
 378   StdProxy_Disconnect
 379 };
 380
 381 static void StdProxy_GetChannel(LPVOID iface,
 382                                    LPRPCCHANNELBUFFER *ppChannel)
 383 {
 384   StdProxyImpl *This = impl_from_proxy_obj( iface );
 385   TRACE("(%p)->GetChannel(%p) %s\n",This,ppChannel,This->name);
 386
 387   *ppChannel = This->pChannel;
 388 }
 389
 390 static void StdProxy_GetIID(LPVOID iface,
 391                                const IID **ppiid)
 392 {
 393   StdProxyImpl *This = impl_from_proxy_obj( iface );
 394   TRACE("(%p)->GetIID(%p) %s\n",This,ppiid,This->name);
 395
 396   *ppiid = This->piid;
 397 }
 398
 399 HRESULT WINAPI IUnknown_QueryInterface_Proxy(LPUNKNOWN iface,
 400                                             REFIID riid,
 401                                             LPVOID *ppvObj)
 402 {
 403   StdProxyImpl *This = impl_from_proxy_obj( iface );
 404   TRACE("(%p)->QueryInterface(%s,%p) %s\n",This,debugstr_guid(riid),ppvObj,This->name);
 405   return IUnknown_QueryInterface(This->pUnkOuter,riid,ppvObj);
 406 }
 407
 408 ULONG WINAPI IUnknown_AddRef_Proxy(LPUNKNOWN iface)
 409 {
 410   StdProxyImpl *This = impl_from_proxy_obj( iface );
 411   TRACE("(%p)->AddRef() %s\n",This,This->name);
 412   return IUnknown_AddRef(This->pUnkOuter);
 413 }
 414
 415 ULONG WINAPI IUnknown_Release_Proxy(LPUNKNOWN iface)
 416 {
 417   StdProxyImpl *This = impl_from_proxy_obj( iface );
 418   TRACE("(%p)->Release() %s\n",This,This->name);
 419   return IUnknown_Release(This->pUnkOuter);
 420 }
 421
 422 /***********************************************************************
 423  *           NdrProxyInitialize [RPCRT4.@]
 424  */
 425 void WINAPI NdrProxyInitialize(void *This,
 426                               PRPC_MESSAGE pRpcMsg,
 427                               PMIDL_STUB_MESSAGE pStubMsg,
 428                               PMIDL_STUB_DESC pStubDescriptor,
 429                               unsigned int ProcNum)
 430 {
 431   TRACE("(%p,%p,%p,%p,%d)\n", This, pRpcMsg, pStubMsg, pStubDescriptor, ProcNum);
 432   NdrClientInitializeNew(pRpcMsg, pStubMsg, pStubDescriptor, ProcNum);
 433   StdProxy_GetChannel(This, &pStubMsg->pRpcChannelBuffer);
 434   IRpcChannelBuffer_GetDestCtx(pStubMsg->pRpcChannelBuffer,
 435                                &pStubMsg->dwDestContext,
 436                                &pStubMsg->pvDestContext);
 437   TRACE("channel=%p\n", pStubMsg->pRpcChannelBuffer);
 438 }
 439
 440 /***********************************************************************
 441  *           NdrProxyGetBuffer [RPCRT4.@]
 442  */
 443 void WINAPI NdrProxyGetBuffer(void *This,
 444                              PMIDL_STUB_MESSAGE pStubMsg)
 445 {
 446   HRESULT hr;
 447   const IID *riid = NULL;
 448
 449   TRACE("(%p,%p)\n", This, pStubMsg);
 450   pStubMsg->RpcMsg->BufferLength = pStubMsg->BufferLength;
 451   pStubMsg->dwStubPhase = PROXY_GETBUFFER;
 452   StdProxy_GetIID(This, &riid);
 453   hr = IRpcChannelBuffer_GetBuffer(pStubMsg->pRpcChannelBuffer,
 454                                   (RPCOLEMESSAGE*)pStubMsg->RpcMsg,
 455                                   riid);
 456   if (FAILED(hr))
 457   {
 458     RpcRaiseException(hr);
 459     return;
 460   }
 461   pStubMsg->fBufferValid = TRUE;
 462   pStubMsg->BufferStart = pStubMsg->RpcMsg->Buffer;
 463   pStubMsg->BufferEnd = pStubMsg->BufferStart + pStubMsg->BufferLength;
 464   pStubMsg->Buffer = pStubMsg->BufferStart;
 465   pStubMsg->dwStubPhase = PROXY_MARSHAL;
 466 }
 467
 468 /***********************************************************************
 469  *           NdrProxySendReceive [RPCRT4.@]
 470  */
 471 void WINAPI NdrProxySendReceive(void *This,
 472                                PMIDL_STUB_MESSAGE pStubMsg)
 473 {
 474   ULONG Status = 0;
 475   HRESULT hr;
 476
 477   TRACE("(%p,%p)\n", This, pStubMsg);
 478
 479   if (!pStubMsg->pRpcChannelBuffer)
 480   {
 481     WARN("Trying to use disconnected proxy %p\n", This);
 482     RpcRaiseException(RPC_E_DISCONNECTED);
 483   }
 484
 485   pStubMsg->dwStubPhase = PROXY_SENDRECEIVE;
 486   /* avoid sending uninitialised parts of the buffer on the wire */
 487   pStubMsg->RpcMsg->BufferLength = pStubMsg->Buffer - (unsigned char *)pStubMsg->RpcMsg->Buffer;
 488   hr = IRpcChannelBuffer_SendReceive(pStubMsg->pRpcChannelBuffer,
 489                                     (RPCOLEMESSAGE*)pStubMsg->RpcMsg,
 490                                     &Status);
 491   pStubMsg->dwStubPhase = PROXY_UNMARSHAL;
 492   pStubMsg->BufferLength = pStubMsg->RpcMsg->BufferLength;
 493   pStubMsg->BufferStart = pStubMsg->RpcMsg->Buffer;
 494   pStubMsg->BufferEnd = pStubMsg->BufferStart + pStubMsg->BufferLength;
 495   pStubMsg->Buffer = pStubMsg->BufferStart;
 496
 497   /* raise exception if call failed */
 498   if (hr == RPC_S_CALL_FAILED) RpcRaiseException(*(DWORD*)pStubMsg->Buffer);
 499   else if (FAILED(hr)) RpcRaiseException(hr);
 500 }
 501
 502 /***********************************************************************
 503  *           NdrProxyFreeBuffer [RPCRT4.@]
 504  */
 505 void WINAPI NdrProxyFreeBuffer(void *This,
 506                               PMIDL_STUB_MESSAGE pStubMsg)
 507 {
 508   TRACE("(%p,%p)\n", This, pStubMsg);
 509
 510   if (pStubMsg->fBufferValid)
 511   {
 512     IRpcChannelBuffer_FreeBuffer(pStubMsg->pRpcChannelBuffer,
 513                                  (RPCOLEMESSAGE*)pStubMsg->RpcMsg);
 514     pStubMsg->fBufferValid = TRUE;
 515   }
 516 }
 517
 518 /***********************************************************************
 519  *           NdrProxyErrorHandler [RPCRT4.@]
 520  */
 521 HRESULT WINAPI NdrProxyErrorHandler(DWORD dwExceptionCode)
 522 {
 523   WARN("(0x%08x): a proxy call failed\n", dwExceptionCode);
 524
 525   if (FAILED(dwExceptionCode))
 526     return dwExceptionCode;
 527   else
 528     return HRESULT_FROM_WIN32(dwExceptionCode);
 529 }
 530
 531 HRESULT WINAPI
 532 CreateProxyFromTypeInfo( LPTYPEINFO pTypeInfo, LPUNKNOWN pUnkOuter, REFIID riid,
 533                          LPRPCPROXYBUFFER *ppProxy, LPVOID *ppv )
 534 {
 535     typedef INT (WINAPI *MessageBoxA)(HWND,LPCSTR,LPCSTR,UINT);
 536     HMODULE hUser32 = LoadLibraryA("user32");
 537     MessageBoxA pMessageBoxA = (void *)GetProcAddress(hUser32, "MessageBoxA");
 538
 539     FIXME("%p %p %s %p %p\n", pTypeInfo, pUnkOuter, debugstr_guid(riid), ppProxy, ppv);
 540     if (pMessageBoxA)
 541     {
 542         pMessageBoxA(NULL,
 543             "The native implementation of OLEAUT32.DLL cannot be used "
 544             "with Wine's RPCRT4.DLL. Remove OLEAUT32.DLL and try again.\n",
 545             "Wine: Unimplemented CreateProxyFromTypeInfo",
 546             0x10);
 547         ExitProcess(1);
 548     }
 549     return E_NOTIMPL;
 550 }
 551
 552 HRESULT WINAPI
 553 CreateStubFromTypeInfo(ITypeInfo *pTypeInfo, REFIID riid, IUnknown *pUnkServer,
 554                        IRpcStubBuffer **ppStub )
 555 {
 556     typedef INT (WINAPI *MessageBoxA)(HWND,LPCSTR,LPCSTR,UINT);
 557     HMODULE hUser32 = LoadLibraryA("user32");
 558     MessageBoxA pMessageBoxA = (void *)GetProcAddress(hUser32, "MessageBoxA");
 559
 560     FIXME("%p %s %p %p\n", pTypeInfo, debugstr_guid(riid), pUnkServer, ppStub);
 561     if (pMessageBoxA)
 562     {
 563         pMessageBoxA(NULL,
 564             "The native implementation of OLEAUT32.DLL cannot be used "
 565             "with Wine's RPCRT4.DLL. Remove OLEAUT32.DLL and try again.\n",
 566             "Wine: Unimplemented CreateProxyFromTypeInfo",
 567             0x10);
 568         ExitProcess(1);
 569     }
 570     return E_NOTIMPL;
 571 }