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 #define WIN32_NO_STATUS
  25 #define _INC_WINDOWS
  26
  27 #include <config.h>
  28 //#include "wine/port.h"
  29
  30 #include <stdarg.h>
  31
  32 #define COBJMACROS
  33
  34 #include <windef.h>
  35 #include <winbase.h>
  36 //#include "winerror.h"
  37
  38 #include <objbase.h>
  39 #include <rpcproxy.h>
  40
  41 #include "cpsf.h"
  42 //#include "ndr_misc.h"
  43 //#include "ndr_stubless.h"
  44 #include <wine/debug.h>
  45
  46 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  47
  48 /* I don't know what MS's std proxy structure looks like,
  49    so this probably doesn't match, but that shouldn't matter */
  50 typedef struct {
  51   IRpcProxyBuffer IRpcProxyBuffer_iface;
  52   LPVOID *PVtbl;
  53   LONG RefCount;
  54   const IID* piid;
  55   LPUNKNOWN pUnkOuter;
  56   IUnknown *base_object;  /* must be at offset 0x10 from PVtbl */
  57   IRpcProxyBuffer *base_proxy;
  58   PCInterfaceName name;
  59   LPPSFACTORYBUFFER pPSFactory;
  60   LPRPCCHANNELBUFFER pChannel;
  61 } StdProxyImpl;
  62
  63 static const IRpcProxyBufferVtbl StdProxy_Vtbl;
  64
  65 static inline StdProxyImpl *impl_from_IRpcProxyBuffer(IRpcProxyBuffer *iface)
  66 {
  67     return CONTAINING_RECORD(iface, StdProxyImpl, IRpcProxyBuffer_iface);
  68 }
  69
  70 static inline StdProxyImpl *impl_from_proxy_obj( void *iface )
  71 {
  72     return CONTAINING_RECORD(iface, StdProxyImpl, PVtbl);
  73 }
  74
  75 #ifdef __i386__
  76
  77 extern void call_stubless_func(void);
  78 __ASM_GLOBAL_FUNC(call_stubless_func,
  79                   "movl 4(%esp),%ecx\n\t"         /* This pointer */
  80                   "movl (%ecx),%ecx\n\t"          /* This->lpVtbl */
  81                   "movl -8(%ecx),%ecx\n\t"        /* MIDL_STUBLESS_PROXY_INFO */
  82                   "movl 8(%ecx),%edx\n\t"         /* info->FormatStringOffset */
  83                   "movzwl (%edx,%eax,2),%edx\n\t" /* FormatStringOffset[index] */
  84                   "addl 4(%ecx),%edx\n\t"         /* info->ProcFormatString + offset */
  85                   "movzwl 8(%edx),%eax\n\t"       /* arguments size */
  86                   "pushl %eax\n\t"
  87                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  88                   "leal 8(%esp),%eax\n\t"         /* &This */
  89                   "pushl %eax\n\t"
  90                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  91                   "pushl %edx\n\t"                /* format string */
  92                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  93                   "pushl (%ecx)\n\t"              /* info->pStubDesc */
  94                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  95                   "call " __ASM_NAME("ndr_client_call") "\n\t"
  96                   "leal 12(%esp),%esp\n\t"
  97                   __ASM_CFI(".cfi_adjust_cfa_offset -12\n\t")
  98                   "popl %edx\n\t"                 /* arguments size */
  99                   __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
 100                   "movl (%esp),%ecx\n\t"  /* return address */
 101                   "addl %edx,%esp\n\t"
 102                   "jmp *%ecx" );
 103
 104 #include "pshpack1.h"
 105 struct thunk
 106 {
 107   BYTE mov_eax;
 108   DWORD index;
 109   BYTE jmp;
 110   LONG handler;
 111 };
 112 #include "poppack.h"
 113
 114 static inline void init_thunk( struct thunk *thunk, unsigned int index )
 115 {
 116     thunk->mov_eax = 0xb8; /* movl $n,%eax */
 117     thunk->index   = index;
 118     thunk->jmp     = 0xe9; /* jmp */
 119     thunk->handler = (char *)call_stubless_func - (char *)(&thunk->handler + 1);
 120 }
 121
 122 #elif defined(__x86_64__)
 123
 124 extern void call_stubless_func(void);
 125 __ASM_GLOBAL_FUNC(call_stubless_func,
 126                   "movq %rcx,0x8(%rsp)\n\t"
 127                   "movq %rdx,0x10(%rsp)\n\t"
 128                   "movq %r8,0x18(%rsp)\n\t"
 129                   "movq %r9,0x20(%rsp)\n\t"
 130                   "leaq 0x8(%rsp),%r8\n\t"        /* &This */
 131                   "movq (%rcx),%rcx\n\t"          /* This->lpVtbl */
 132                   "movq -0x10(%rcx),%rcx\n\t"     /* MIDL_STUBLESS_PROXY_INFO */
 133                   "movq 0x10(%rcx),%rdx\n\t"      /* info->FormatStringOffset */
 134                   "movzwq (%rdx,%r10,2),%rdx\n\t" /* FormatStringOffset[index] */
 135                   "addq 8(%rcx),%rdx\n\t"         /* info->ProcFormatString + offset */
 136                   "movq (%rcx),%rcx\n\t"          /* info->pStubDesc */
 137                   "subq $0x38,%rsp\n\t"
 138                   __ASM_CFI(".cfi_adjust_cfa_offset 0x38\n\t")
 139                   "movq %xmm1,0x20(%rsp)\n\t"
 140                   "movq %xmm2,0x28(%rsp)\n\t"
 141                   "movq %xmm3,0x30(%rsp)\n\t"
 142                   "leaq 0x18(%rsp),%r9\n\t"       /* fpu_args */
 143                   "call " __ASM_NAME("ndr_client_call") "\n\t"
 144                   "addq $0x38,%rsp\n\t"
 145                   __ASM_CFI(".cfi_adjust_cfa_offset -0x38\n\t")
 146                   "ret" );
 147
 148 #include "pshpack1.h"
 149 struct thunk
 150 {
 151     BYTE mov_r10[3];
 152     DWORD index;
 153     BYTE mov_rax[2];
 154     void *call_stubless;
 155     BYTE jmp_rax[2];
 156 };
 157 #include "poppack.h"
 158
 159 static const struct thunk thunk_template =
 160 {
 161     { 0x49, 0xc7, 0xc2 }, 0,  /* movq $index,%r10 */
 162     { 0x48, 0xb8 }, 0,        /* movq $call_stubless_func,%rax */
 163     { 0xff, 0xe0 }            /* jmp *%rax */
 164 };
 165
 166 static inline void init_thunk( struct thunk *thunk, unsigned int index )
 167 {
 168     *thunk = thunk_template;
 169     thunk->index = index;
 170     thunk->call_stubless = call_stubless_func;
 171 }
 172
 173 #else  /* __i386__ */
 174
 175 #warning You must implement stubless proxies for your CPU
 176
 177 struct thunk
 178 {
 179   DWORD index;
 180 };
 181
 182 static inline void init_thunk( struct thunk *thunk, unsigned int index )
 183 {
 184     thunk->index = index;
 185 }
 186
 187 #endif  /* __i386__ */
 188
 189 #define BLOCK_SIZE 1024
 190 #define MAX_BLOCKS 64  /* 64k methods should be enough for anybody */
 191
 192 static const struct thunk *method_blocks[MAX_BLOCKS];
 193
 194 static const struct thunk *allocate_block( unsigned int num )
 195 {
 196     unsigned int i;
 197     struct thunk *prev, *block;
 198
 199     block = VirtualAlloc( NULL, BLOCK_SIZE * sizeof(*block),
 200                           MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE );
 201     if (!block) return NULL;
 202
 203     for (i = 0; i < BLOCK_SIZE; i++) init_thunk( &block[i], BLOCK_SIZE * num + i + 3 );
 204     VirtualProtect( block, BLOCK_SIZE * sizeof(*block), PAGE_EXECUTE_READ, NULL );
 205     prev = InterlockedCompareExchangePointer( (void **)&method_blocks[num], block, NULL );
 206     if (prev) /* someone beat us to it */
 207     {
 208         VirtualFree( block, 0, MEM_RELEASE );
 209         block = prev;
 210     }
 211     return block;
 212 }
 213
 214 static BOOL fill_stubless_table( IUnknownVtbl *vtbl, DWORD num )
 215 {
 216     const void **entry = (const void **)(vtbl + 1);
 217     DWORD i, j;
 218
 219     if (num - 3 > BLOCK_SIZE * MAX_BLOCKS)
 220     {
 221         FIXME( "%u methods not supported\n", num );
 222         return FALSE;
 223     }
 224     for (i = 0; i < (num - 3 + BLOCK_SIZE - 1) / BLOCK_SIZE; i++)
 225     {
 226         const struct thunk *block = method_blocks[i];
 227         if (!block && !(block = allocate_block( i ))) return FALSE;
 228         for (j = 0; j < BLOCK_SIZE && j < num - 3 - i * BLOCK_SIZE; j++, entry++)
 229             if (*entry == (LPVOID)-1) *entry = &block[j];
 230     }
 231     return TRUE;
 232 }
 233
 234 HRESULT StdProxy_Construct(REFIID riid,
 235                            LPUNKNOWN pUnkOuter,
 236                            const ProxyFileInfo *ProxyInfo,
 237                            int Index,
 238                            LPPSFACTORYBUFFER pPSFactory,
 239                            LPRPCPROXYBUFFER *ppProxy,
 240                            LPVOID *ppvObj)
 241 {
 242   StdProxyImpl *This;
 243   PCInterfaceName name = ProxyInfo->pNamesArray[Index];
 244   CInterfaceProxyVtbl *vtbl = ProxyInfo->pProxyVtblList[Index];
 245
 246   TRACE("(%p,%p,%p,%p,%p) %s\n", pUnkOuter, vtbl, pPSFactory, ppProxy, ppvObj, name);
 247
 248   /* TableVersion = 2 means it is the stubless version of CInterfaceProxyVtbl */
 249   if (ProxyInfo->TableVersion > 1) {
 250     ULONG count = ProxyInfo->pStubVtblList[Index]->header.DispatchTableCount;
 251     vtbl = (CInterfaceProxyVtbl *)((const void **)vtbl + 1);
 252     TRACE("stubless vtbl %p: count=%d\n", vtbl->Vtbl, count );
 253     fill_stubless_table( (IUnknownVtbl *)vtbl->Vtbl, count );
 254   }
 255
 256   if (!IsEqualGUID(vtbl->header.piid, riid)) {
 257     ERR("IID mismatch during proxy creation\n");
 258     return RPC_E_UNEXPECTED;
 259   }
 260
 261   This = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(StdProxyImpl));
 262   if (!This) return E_OUTOFMEMORY;
 263
 264   if (!pUnkOuter) pUnkOuter = (IUnknown *)This;
 265   This->IRpcProxyBuffer_iface.lpVtbl = &StdProxy_Vtbl;
 266   This->PVtbl = vtbl->Vtbl;
 267   /* one reference for the proxy */
 268   This->RefCount = 1;
 269   This->piid = vtbl->header.piid;
 270   This->base_object = NULL;
 271   This->base_proxy = NULL;
 272   This->pUnkOuter = pUnkOuter;
 273   This->name = name;
 274   This->pPSFactory = pPSFactory;
 275   This->pChannel = NULL;
 276
 277   if(ProxyInfo->pDelegatedIIDs && ProxyInfo->pDelegatedIIDs[Index])
 278   {
 279       HRESULT r = create_proxy( ProxyInfo->pDelegatedIIDs[Index], NULL,
 280                                 &This->base_proxy, (void **)&This->base_object );
 281       if (FAILED(r))
 282       {
 283           HeapFree( GetProcessHeap(), 0, This );
 284           return r;
 285       }
 286   }
 287
 288   *ppProxy = &This->IRpcProxyBuffer_iface;
 289   *ppvObj = &This->PVtbl;
 290   IUnknown_AddRef((IUnknown *)*ppvObj);
 291   IPSFactoryBuffer_AddRef(pPSFactory);
 292
 293   TRACE( "iid=%s this %p proxy %p obj %p vtbl %p base proxy %p base obj %p\n",
 294          debugstr_guid(riid), This, *ppProxy, *ppvObj, This->PVtbl, This->base_proxy, This->base_object );
 295   return S_OK;
 296 }
 297
 298 static HRESULT WINAPI StdProxy_QueryInterface(LPRPCPROXYBUFFER iface,
 299                                              REFIID riid,
 300                                              LPVOID *obj)
 301 {
 302   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 303   TRACE("(%p)->QueryInterface(%s,%p)\n",This,debugstr_guid(riid),obj);
 304
 305   if (IsEqualGUID(&IID_IUnknown,riid) ||
 306       IsEqualGUID(This->piid,riid)) {
 307     *obj = &This->PVtbl;
 308     InterlockedIncrement(&This->RefCount);
 309     return S_OK;
 310   }
 311
 312   if (IsEqualGUID(&IID_IRpcProxyBuffer,riid)) {
 313     *obj = &This->IRpcProxyBuffer_iface;
 314     InterlockedIncrement(&This->RefCount);
 315     return S_OK;
 316   }
 317
 318   return E_NOINTERFACE;
 319 }
 320
 321 static ULONG WINAPI StdProxy_AddRef(LPRPCPROXYBUFFER iface)
 322 {
 323   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 324   TRACE("(%p)->AddRef()\n",This);
 325
 326   return InterlockedIncrement(&This->RefCount);
 327 }
 328
 329 static ULONG WINAPI StdProxy_Release(LPRPCPROXYBUFFER iface)
 330 {
 331   ULONG refs;
 332   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 333   TRACE("(%p)->Release()\n",This);
 334
 335   refs = InterlockedDecrement(&This->RefCount);
 336   if (!refs)
 337   {
 338     if (This->pChannel)
 339       IRpcProxyBuffer_Disconnect(&This->IRpcProxyBuffer_iface);
 340
 341     if (This->base_object) IUnknown_Release( This->base_object );
 342     if (This->base_proxy) IRpcProxyBuffer_Release( This->base_proxy );
 343
 344     IPSFactoryBuffer_Release(This->pPSFactory);
 345     HeapFree(GetProcessHeap(),0,This);
 346   }
 347
 348   return refs;
 349 }
 350
 351 static HRESULT WINAPI StdProxy_Connect(LPRPCPROXYBUFFER iface,
 352                                       LPRPCCHANNELBUFFER pChannel)
 353 {
 354   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 355   TRACE("(%p)->Connect(%p)\n",This,pChannel);
 356
 357   This->pChannel = pChannel;
 358   IRpcChannelBuffer_AddRef(pChannel);
 359   if (This->base_proxy) IRpcProxyBuffer_Connect( This->base_proxy, pChannel );
 360   return S_OK;
 361 }
 362
 363 static VOID WINAPI StdProxy_Disconnect(LPRPCPROXYBUFFER iface)
 364 {
 365   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 366   TRACE("(%p)->Disconnect()\n",This);
 367
 368   if (This->base_proxy) IRpcProxyBuffer_Disconnect( This->base_proxy );
 369
 370   IRpcChannelBuffer_Release(This->pChannel);
 371   This->pChannel = NULL;
 372 }
 373
 374 static const IRpcProxyBufferVtbl StdProxy_Vtbl =
 375 {
 376   StdProxy_QueryInterface,
 377   StdProxy_AddRef,
 378   StdProxy_Release,
 379   StdProxy_Connect,
 380   StdProxy_Disconnect
 381 };
 382
 383 static void StdProxy_GetChannel(LPVOID iface,
 384                                    LPRPCCHANNELBUFFER *ppChannel)
 385 {
 386   StdProxyImpl *This = impl_from_proxy_obj( iface );
 387   TRACE("(%p)->GetChannel(%p) %s\n",This,ppChannel,This->name);
 388
 389   *ppChannel = This->pChannel;
 390 }
 391
 392 static void StdProxy_GetIID(LPVOID iface,
 393                                const IID **ppiid)
 394 {
 395   StdProxyImpl *This = impl_from_proxy_obj( iface );
 396   TRACE("(%p)->GetIID(%p) %s\n",This,ppiid,This->name);
 397
 398   *ppiid = This->piid;
 399 }
 400
 401 HRESULT WINAPI IUnknown_QueryInterface_Proxy(LPUNKNOWN iface,
 402                                             REFIID riid,
 403                                             LPVOID *ppvObj)
 404 {
 405   StdProxyImpl *This = impl_from_proxy_obj( iface );
 406   TRACE("(%p)->QueryInterface(%s,%p) %s\n",This,debugstr_guid(riid),ppvObj,This->name);
 407   return IUnknown_QueryInterface(This->pUnkOuter,riid,ppvObj);
 408 }
 409
 410 ULONG WINAPI IUnknown_AddRef_Proxy(LPUNKNOWN iface)
 411 {
 412   StdProxyImpl *This = impl_from_proxy_obj( iface );
 413   TRACE("(%p)->AddRef() %s\n",This,This->name);
 414   return IUnknown_AddRef(This->pUnkOuter);
 415 }
 416
 417 ULONG WINAPI IUnknown_Release_Proxy(LPUNKNOWN iface)
 418 {
 419   StdProxyImpl *This = impl_from_proxy_obj( iface );
 420   TRACE("(%p)->Release() %s\n",This,This->name);
 421   return IUnknown_Release(This->pUnkOuter);
 422 }
 423
 424 /***********************************************************************
 425  *           NdrProxyInitialize [RPCRT4.@]
 426  */
 427 void WINAPI NdrProxyInitialize(void *This,
 428                               PRPC_MESSAGE pRpcMsg,
 429                               PMIDL_STUB_MESSAGE pStubMsg,
 430                               PMIDL_STUB_DESC pStubDescriptor,
 431                               unsigned int ProcNum)
 432 {
 433   TRACE("(%p,%p,%p,%p,%d)\n", This, pRpcMsg, pStubMsg, pStubDescriptor, ProcNum);
 434   NdrClientInitializeNew(pRpcMsg, pStubMsg, pStubDescriptor, ProcNum);
 435   StdProxy_GetChannel(This, &pStubMsg->pRpcChannelBuffer);
 436   IRpcChannelBuffer_GetDestCtx(pStubMsg->pRpcChannelBuffer,
 437                                &pStubMsg->dwDestContext,
 438                                &pStubMsg->pvDestContext);
 439   TRACE("channel=%p\n", pStubMsg->pRpcChannelBuffer);
 440 }
 441
 442 /***********************************************************************
 443  *           NdrProxyGetBuffer [RPCRT4.@]
 444  */
 445 void WINAPI NdrProxyGetBuffer(void *This,
 446                              PMIDL_STUB_MESSAGE pStubMsg)
 447 {
 448   HRESULT hr;
 449   const IID *riid = NULL;
 450
 451   TRACE("(%p,%p)\n", This, pStubMsg);
 452   pStubMsg->RpcMsg->BufferLength = pStubMsg->BufferLength;
 453   pStubMsg->dwStubPhase = PROXY_GETBUFFER;
 454   StdProxy_GetIID(This, &riid);
 455   hr = IRpcChannelBuffer_GetBuffer(pStubMsg->pRpcChannelBuffer,
 456                                   (RPCOLEMESSAGE*)pStubMsg->RpcMsg,
 457                                   riid);
 458   if (FAILED(hr))
 459   {
 460     RpcRaiseException(hr);
 461     return;
 462   }
 463   pStubMsg->fBufferValid = TRUE;
 464   pStubMsg->BufferStart = pStubMsg->RpcMsg->Buffer;
 465   pStubMsg->BufferEnd = pStubMsg->BufferStart + pStubMsg->BufferLength;
 466   pStubMsg->Buffer = pStubMsg->BufferStart;
 467   pStubMsg->dwStubPhase = PROXY_MARSHAL;
 468 }
 469
 470 /***********************************************************************
 471  *           NdrProxySendReceive [RPCRT4.@]
 472  */
 473 void WINAPI NdrProxySendReceive(void *This,
 474                                PMIDL_STUB_MESSAGE pStubMsg)
 475 {
 476   ULONG Status = 0;
 477   HRESULT hr;
 478
 479   TRACE("(%p,%p)\n", This, pStubMsg);
 480
 481   if (!pStubMsg->pRpcChannelBuffer)
 482   {
 483     WARN("Trying to use disconnected proxy %p\n", This);
 484     RpcRaiseException(RPC_E_DISCONNECTED);
 485   }
 486
 487   pStubMsg->dwStubPhase = PROXY_SENDRECEIVE;
 488   /* avoid sending uninitialised parts of the buffer on the wire */
 489   pStubMsg->RpcMsg->BufferLength = pStubMsg->Buffer - (unsigned char *)pStubMsg->RpcMsg->Buffer;
 490   hr = IRpcChannelBuffer_SendReceive(pStubMsg->pRpcChannelBuffer,
 491                                     (RPCOLEMESSAGE*)pStubMsg->RpcMsg,
 492                                     &Status);
 493   pStubMsg->dwStubPhase = PROXY_UNMARSHAL;
 494   pStubMsg->BufferLength = pStubMsg->RpcMsg->BufferLength;
 495   pStubMsg->BufferStart = pStubMsg->RpcMsg->Buffer;
 496   pStubMsg->BufferEnd = pStubMsg->BufferStart + pStubMsg->BufferLength;
 497   pStubMsg->Buffer = pStubMsg->BufferStart;
 498
 499   /* raise exception if call failed */
 500   if (hr == RPC_S_CALL_FAILED) RpcRaiseException(*(DWORD*)pStubMsg->Buffer);
 501   else if (FAILED(hr)) RpcRaiseException(hr);
 502 }
 503
 504 /***********************************************************************
 505  *           NdrProxyFreeBuffer [RPCRT4.@]
 506  */
 507 void WINAPI NdrProxyFreeBuffer(void *This,
 508                               PMIDL_STUB_MESSAGE pStubMsg)
 509 {
 510   TRACE("(%p,%p)\n", This, pStubMsg);
 511
 512   if (pStubMsg->fBufferValid)
 513   {
 514     IRpcChannelBuffer_FreeBuffer(pStubMsg->pRpcChannelBuffer,
 515                                  (RPCOLEMESSAGE*)pStubMsg->RpcMsg);
 516     pStubMsg->fBufferValid = TRUE;
 517   }
 518 }
 519
 520 /***********************************************************************
 521  *           NdrProxyErrorHandler [RPCRT4.@]
 522  */
 523 HRESULT WINAPI NdrProxyErrorHandler(DWORD dwExceptionCode)
 524 {
 525   WARN("(0x%08x): a proxy call failed\n", dwExceptionCode);
 526
 527   if (FAILED(dwExceptionCode))
 528     return dwExceptionCode;
 529   else
 530     return HRESULT_FROM_WIN32(dwExceptionCode);
 531 }
 532
 533 HRESULT WINAPI
 534 CreateProxyFromTypeInfo( LPTYPEINFO pTypeInfo, LPUNKNOWN pUnkOuter, REFIID riid,
 535                          LPRPCPROXYBUFFER *ppProxy, LPVOID *ppv )
 536 {
 537     typedef INT (WINAPI *MessageBoxA)(HWND,LPCSTR,LPCSTR,UINT);
 538     HMODULE hUser32 = LoadLibraryA("user32");
 539     MessageBoxA pMessageBoxA = (void *)GetProcAddress(hUser32, "MessageBoxA");
 540
 541     FIXME("%p %p %s %p %p\n", pTypeInfo, pUnkOuter, debugstr_guid(riid), ppProxy, ppv);
 542     if (pMessageBoxA)
 543     {
 544         pMessageBoxA(NULL,
 545             "The native implementation of OLEAUT32.DLL cannot be used "
 546             "with Wine's RPCRT4.DLL. Remove OLEAUT32.DLL and try again.\n",
 547             "Wine: Unimplemented CreateProxyFromTypeInfo",
 548             0x10);
 549         ExitProcess(1);
 550     }
 551     return E_NOTIMPL;
 552 }
 553
 554 HRESULT WINAPI
 555 CreateStubFromTypeInfo(ITypeInfo *pTypeInfo, REFIID riid, IUnknown *pUnkServer,
 556                        IRpcStubBuffer **ppStub )
 557 {
 558     typedef INT (WINAPI *MessageBoxA)(HWND,LPCSTR,LPCSTR,UINT);
 559     HMODULE hUser32 = LoadLibraryA("user32");
 560     MessageBoxA pMessageBoxA = (void *)GetProcAddress(hUser32, "MessageBoxA");
 561
 562     FIXME("%p %s %p %p\n", pTypeInfo, debugstr_guid(riid), pUnkServer, ppStub);
 563     if (pMessageBoxA)
 564     {
 565         pMessageBoxA(NULL,
 566             "The native implementation of OLEAUT32.DLL cannot be used "
 567             "with Wine's RPCRT4.DLL. Remove OLEAUT32.DLL and try again.\n",
 568             "Wine: Unimplemented CreateProxyFromTypeInfo",
 569             0x10);
 570         ExitProcess(1);
 571     }
 572     return E_NOTIMPL;
 573 }