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
  22 #include <stdarg.h>
  23
  24 #define COBJMACROS
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "winerror.h"
  29
  30 #include "objbase.h"
  31 #include "rpcproxy.h"
  32
  33 #include "cpsf.h"
  34 #include "ndr_misc.h"
  35 #include "ndr_stubless.h"
  36 #include "wine/asm.h"
  37 #include "wine/debug.h"
  38
  39 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  40
  41 static const IRpcProxyBufferVtbl StdProxy_Vtbl;
  42
  43 static inline StdProxyImpl *impl_from_IRpcProxyBuffer(IRpcProxyBuffer *iface)
  44 {
  45     return CONTAINING_RECORD(iface, StdProxyImpl, IRpcProxyBuffer_iface);
  46 }
  47
  48 static inline StdProxyImpl *impl_from_proxy_obj( void *iface )
  49 {
  50     return CONTAINING_RECORD(iface, StdProxyImpl, PVtbl);
  51 }
  52
  53 #ifdef __i386__
  54
  55 extern void call_stubless_func(void);
  56 __ASM_GLOBAL_FUNC(call_stubless_func,
  57                   "movl 4(%esp),%ecx\n\t"         /* This pointer */
  58                   "movl (%ecx),%ecx\n\t"          /* This->lpVtbl */
  59                   "movl -8(%ecx),%ecx\n\t"        /* MIDL_STUBLESS_PROXY_INFO */
  60                   "movl 8(%ecx),%edx\n\t"         /* info->FormatStringOffset */
  61                   "movzwl (%edx,%eax,2),%edx\n\t" /* FormatStringOffset[index] */
  62                   "addl 4(%ecx),%edx\n\t"         /* info->ProcFormatString + offset */
  63                   "movzbl 1(%edx),%eax\n\t"       /* Oi_flags */
  64                   "andl $0x08,%eax\n\t"           /* Oi_HAS_RPCFLAGS */
  65                   "shrl $1,%eax\n\t"
  66                   "movzwl 4(%edx,%eax),%eax\n\t"  /* arguments size */
  67                   "pushl %eax\n\t"
  68                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  69                   "leal 8(%esp),%eax\n\t"         /* &This */
  70                   "pushl %eax\n\t"
  71                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  72                   "pushl %edx\n\t"                /* format string */
  73                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  74                   "pushl (%ecx)\n\t"              /* info->pStubDesc */
  75                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  76                   "call " __ASM_NAME("ndr_client_call") "\n\t"
  77                   "leal 12(%esp),%esp\n\t"
  78                   __ASM_CFI(".cfi_adjust_cfa_offset -12\n\t")
  79                   "popl %edx\n\t"                 /* arguments size */
  80                   __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
  81                   "movl (%esp),%ecx\n\t"  /* return address */
  82                   "addl %edx,%esp\n\t"
  83                   "jmp *%ecx" );
  84
  85 #include "pshpack1.h"
  86 struct thunk
  87 {
  88   BYTE mov_eax;
  89   DWORD index;
  90   BYTE jmp;
  91   LONG handler;
  92 };
  93 #include "poppack.h"
  94
  95 static inline void init_thunk( struct thunk *thunk, unsigned int index )
  96 {
  97     thunk->mov_eax = 0xb8; /* movl $n,%eax */
  98     thunk->index   = index;
  99     thunk->jmp     = 0xe9; /* jmp */
 100     thunk->handler = (char *)call_stubless_func - (char *)(&thunk->handler + 1);
 101 }
 102
 103 #elif defined(__x86_64__)
 104
 105 extern void call_stubless_func(void);
 106 __ASM_GLOBAL_FUNC(call_stubless_func,
 107                   "subq $0x38,%rsp\n\t"
 108                   __ASM_SEH(".seh_stackalloc 0x38\n\t")
 109                   __ASM_SEH(".seh_endprologue\n\t")
 110                   __ASM_CFI(".cfi_adjust_cfa_offset 0x38\n\t")
 111                   "movq %rcx,0x40(%rsp)\n\t"
 112                   "movq %rdx,0x48(%rsp)\n\t"
 113                   "movq %r8,0x50(%rsp)\n\t"
 114                   "movq %r9,0x58(%rsp)\n\t"
 115                   "leaq 0x40(%rsp),%r8\n\t"       /* &This */
 116                   "movq (%rcx),%rcx\n\t"          /* This->lpVtbl */
 117                   "movq -0x10(%rcx),%rcx\n\t"     /* MIDL_STUBLESS_PROXY_INFO */
 118                   "movq 0x10(%rcx),%rdx\n\t"      /* info->FormatStringOffset */
 119                   "movzwq (%rdx,%r10,2),%rdx\n\t" /* FormatStringOffset[index] */
 120                   "addq 8(%rcx),%rdx\n\t"         /* info->ProcFormatString + offset */
 121                   "movq (%rcx),%rcx\n\t"          /* info->pStubDesc */
 122                   "movq %xmm1,0x20(%rsp)\n\t"
 123                   "movq %xmm2,0x28(%rsp)\n\t"
 124                   "movq %xmm3,0x30(%rsp)\n\t"
 125                   "leaq 0x18(%rsp),%r9\n\t"       /* fpu_args */
 126                   "call " __ASM_NAME("ndr_client_call") "\n\t"
 127                   "addq $0x38,%rsp\n\t"
 128                   __ASM_CFI(".cfi_adjust_cfa_offset -0x38\n\t")
 129                   "ret" );
 130
 131 #include "pshpack1.h"
 132 struct thunk
 133 {
 134     BYTE mov_r10[3];
 135     DWORD index;
 136     BYTE mov_rax[2];
 137     void *call_stubless;
 138     BYTE jmp_rax[2];
 139 };
 140 #include "poppack.h"
 141
 142 static const struct thunk thunk_template =
 143 {
 144     { 0x49, 0xc7, 0xc2 }, 0,  /* movq $index,%r10 */
 145     { 0x48, 0xb8 }, 0,        /* movq $call_stubless_func,%rax */
 146     { 0xff, 0xe0 }            /* jmp *%rax */
 147 };
 148
 149 static inline void init_thunk( struct thunk *thunk, unsigned int index )
 150 {
 151     *thunk = thunk_template;
 152     thunk->index = index;
 153     thunk->call_stubless = call_stubless_func;
 154 }
 155
 156 #elif defined(__arm__)
 157
 158 extern void call_stubless_func(void);
 159 __ASM_GLOBAL_FUNC(call_stubless_func,
 160                   "push {r0-r3}\n\t"
 161                   "mov r2, sp\n\t"              /* stack_top */
 162                   "push {fp,lr}\n\t"
 163                   "mov fp, sp\n\t"
 164                   "ldr r0, [r0]\n\t"            /* This->lpVtbl */
 165                   "ldr r0, [r0,#-8]\n\t"        /* MIDL_STUBLESS_PROXY_INFO */
 166                   "ldr r1, [r0,#8]\n\t"         /* info->FormatStringOffset */
 167                   "ldrh r1, [r1,ip]\n\t"        /* info->FormatStringOffset[index] */
 168                   "ldr ip, [r0,#4]\n\t"         /* info->ProcFormatString */
 169                   "add r1, ip\n\t"              /* info->ProcFormatString + offset */
 170                   "ldr r0, [r0]\n\t"            /* info->pStubDesc */
 171 #ifdef __SOFTFP__
 172                   "mov r3, #0\n\t"
 173 #else
 174                   "vpush {s0-s15}\n\t"          /* store the s0-s15/d0-d7 arguments */
 175                   "mov r3, sp\n\t"              /* fpu_stack */
 176 #endif
 177                   "bl " __ASM_NAME("ndr_client_call") "\n\t"
 178                   "mov sp, fp\n\t"
 179                   "pop {fp,lr}\n\t"
 180                   "add sp, #16\n\t"
 181                   "bx lr" );
 182
 183 struct thunk
 184 {
 185     DWORD ldr_ip;         /* ldr ip,[pc] */
 186     DWORD ldr_pc;         /* ldr pc,[pc] */
 187     DWORD index;
 188     void *func;
 189 };
 190
 191 static inline void init_thunk( struct thunk *thunk, unsigned int index )
 192 {
 193     thunk->ldr_ip = 0xe59fc000; /* ldr ip,[pc] */
 194     thunk->ldr_pc = 0xe59ff000; /* ldr pc,[pc] */
 195     thunk->index  = index * sizeof(unsigned short);
 196     thunk->func   = call_stubless_func;
 197 }
 198
 199 #elif defined(__aarch64__)
 200
 201 extern void call_stubless_func(void);
 202 __ASM_GLOBAL_FUNC( call_stubless_func,
 203                    "stp x29, x30, [sp, #-0x90]!\n\t"
 204                    __ASM_SEH(".seh_save_fplr_x 0x90\n\t")
 205                    "mov x29, sp\n\t"
 206                    __ASM_SEH(".seh_set_fp\n\t")
 207                    __ASM_SEH(".seh_endprologue\n\t")
 208                    "stp d0, d1, [sp, #0x10]\n\t"
 209                    "stp d2, d3, [sp, #0x20]\n\t"
 210                    "stp d4, d5, [sp, #0x30]\n\t"
 211                    "stp d6, d7, [sp, #0x40]\n\t"
 212                    "stp x0, x1, [sp, #0x50]\n\t"
 213                    "stp x2, x3, [sp, #0x60]\n\t"
 214                    "stp x4, x5, [sp, #0x70]\n\t"
 215                    "stp x6, x7, [sp, #0x80]\n\t"
 216                    "ldr x0, [x0]\n\t"                /* This->lpVtbl */
 217                    "ldr x0, [x0, #-16]\n\t"          /* MIDL_STUBLESS_PROXY_INFO */
 218                    "ldp x1, x4, [x0, #8]\n\t"        /* info->ProcFormatString, FormatStringOffset */
 219                    "ldrh w4, [x4, x16, lsl #1]\n\t"  /* info->FormatStringOffset[index] */
 220                    "add x1, x1, x4\n\t"              /* info->ProcFormatString + offset */
 221                    "ldr x0, [x0]\n\t"                /* info->pStubDesc */
 222                    "add x2, sp, #0x50\n\t"           /* stack */
 223                    "add x3, sp, #0x10\n\t"           /* fpu_stack */
 224                    "bl " __ASM_NAME("ndr_client_call") "\n\t"
 225                    "ldp x29, x30, [sp], #0x90\n\t"
 226                    "ret" )
 227
 228 struct thunk
 229 {
 230     DWORD ldr_index;     /* ldr w16, index */
 231     DWORD ldr_func;      /* ldr x17, func */
 232     DWORD br;            /* br x17 */
 233     DWORD index;
 234     void *func;
 235 };
 236
 237 static inline void init_thunk( struct thunk *thunk, unsigned int index )
 238 {
 239     thunk->ldr_index = 0x18000070; /* ldr w16,index */
 240     thunk->ldr_func  = 0x58000071; /* ldr x17,func */
 241     thunk->br        = 0xd61f0220; /* br x17 */
 242     thunk->index     = index;
 243     thunk->func      = call_stubless_func;
 244 }
 245
 246 #else  /* __i386__ */
 247
 248 #warning You must implement stubless proxies for your CPU
 249
 250 struct thunk
 251 {
 252   DWORD index;
 253 };
 254
 255 static inline void init_thunk( struct thunk *thunk, unsigned int index )
 256 {
 257     thunk->index = index;
 258 }
 259
 260 #endif  /* __i386__ */
 261
 262 #define BLOCK_SIZE 1024
 263 #define MAX_BLOCKS 64  /* 64k methods should be enough for anybody */
 264
 265 static const struct thunk *method_blocks[MAX_BLOCKS];
 266
 267 static const struct thunk *allocate_block( unsigned int num )
 268 {
 269     unsigned int i;
 270     struct thunk *prev, *block;
 271     DWORD oldprot;
 272
 273     block = VirtualAlloc( NULL, BLOCK_SIZE * sizeof(*block),
 274                           MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE );
 275     if (!block) return NULL;
 276
 277     for (i = 0; i < BLOCK_SIZE; i++) init_thunk( &block[i], BLOCK_SIZE * num + i + 3 );
 278     VirtualProtect( block, BLOCK_SIZE * sizeof(*block), PAGE_EXECUTE_READ, &oldprot );
 279     prev = InterlockedCompareExchangePointer( (void **)&method_blocks[num], block, NULL );
 280     if (prev) /* someone beat us to it */
 281     {
 282         VirtualFree( block, 0, MEM_RELEASE );
 283         block = prev;
 284     }
 285     return block;
 286 }
 287
 288 BOOL fill_stubless_table( IUnknownVtbl *vtbl, DWORD num )
 289 {
 290     const void **entry = (const void **)(vtbl + 1);
 291     DWORD i, j;
 292
 293     if (num - 3 > BLOCK_SIZE * MAX_BLOCKS)
 294     {
 295         FIXME( "%lu methods not supported\n", num );
 296         return FALSE;
 297     }
 298     for (i = 0; i < (num - 3 + BLOCK_SIZE - 1) / BLOCK_SIZE; i++)
 299     {
 300         const struct thunk *block = method_blocks[i];
 301         if (!block && !(block = allocate_block( i ))) return FALSE;
 302         for (j = 0; j < BLOCK_SIZE && j < num - 3 - i * BLOCK_SIZE; j++, entry++)
 303             if (*entry == (LPVOID)-1) *entry = &block[j];
 304     }
 305     return TRUE;
 306 }
 307
 308 HRESULT StdProxy_Construct(REFIID riid,
 309                            LPUNKNOWN pUnkOuter,
 310                            const ProxyFileInfo *ProxyInfo,
 311                            int Index,
 312                            LPPSFACTORYBUFFER pPSFactory,
 313                            LPRPCPROXYBUFFER *ppProxy,
 314                            LPVOID *ppvObj)
 315 {
 316   StdProxyImpl *This;
 317   PCInterfaceName name = ProxyInfo->pNamesArray[Index];
 318   CInterfaceProxyVtbl *vtbl = ProxyInfo->pProxyVtblList[Index];
 319
 320   TRACE("(%p,%p,%p,%p,%p) %s\n", pUnkOuter, vtbl, pPSFactory, ppProxy, ppvObj, name);
 321
 322   /* TableVersion = 2 means it is the stubless version of CInterfaceProxyVtbl */
 323   if (ProxyInfo->TableVersion > 1) {
 324     ULONG count = ProxyInfo->pStubVtblList[Index]->header.DispatchTableCount;
 325     vtbl = (CInterfaceProxyVtbl *)((const void **)vtbl + 1);
 326     TRACE("stubless vtbl %p: count=%ld\n", vtbl->Vtbl, count );
 327     fill_stubless_table( (IUnknownVtbl *)vtbl->Vtbl, count );
 328   }
 329
 330   if (!IsEqualGUID(vtbl->header.piid, riid)) {
 331     ERR("IID mismatch during proxy creation\n");
 332     return RPC_E_UNEXPECTED;
 333   }
 334
 335   This = calloc(1, sizeof(StdProxyImpl));
 336   if (!This) return E_OUTOFMEMORY;
 337
 338   if (!pUnkOuter) pUnkOuter = (IUnknown *)&This->IRpcProxyBuffer_iface;
 339   This->IRpcProxyBuffer_iface.lpVtbl = &StdProxy_Vtbl;
 340   This->PVtbl = vtbl->Vtbl;
 341   /* one reference for the proxy */
 342   This->RefCount = 1;
 343   This->piid = vtbl->header.piid;
 344   This->base_object = NULL;
 345   This->base_proxy = NULL;
 346   This->pUnkOuter = pUnkOuter;
 347   This->name = name;
 348   This->pPSFactory = pPSFactory;
 349   This->pChannel = NULL;
 350
 351   if(ProxyInfo->pDelegatedIIDs && ProxyInfo->pDelegatedIIDs[Index])
 352   {
 353       HRESULT r = create_proxy( ProxyInfo->pDelegatedIIDs[Index], NULL,
 354                                 &This->base_proxy, (void **)&This->base_object );
 355       if (FAILED(r))
 356       {
 357           free( This );
 358           return r;
 359       }
 360   }
 361
 362   *ppProxy = &This->IRpcProxyBuffer_iface;
 363   *ppvObj = &This->PVtbl;
 364   IUnknown_AddRef((IUnknown *)*ppvObj);
 365   IPSFactoryBuffer_AddRef(pPSFactory);
 366
 367   TRACE( "iid=%s this %p proxy %p obj %p vtbl %p base proxy %p base obj %p\n",
 368          debugstr_guid(riid), This, *ppProxy, *ppvObj, This->PVtbl, This->base_proxy, This->base_object );
 369   return S_OK;
 370 }
 371
 372 HRESULT WINAPI StdProxy_QueryInterface(IRpcProxyBuffer *iface, REFIID riid, void **obj)
 373 {
 374   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 375   TRACE("(%p)->QueryInterface(%s,%p)\n",This,debugstr_guid(riid),obj);
 376
 377   if (IsEqualGUID(&IID_IUnknown,riid) ||
 378       IsEqualGUID(This->piid,riid)) {
 379     *obj = &This->PVtbl;
 380     InterlockedIncrement(&This->RefCount);
 381     return S_OK;
 382   }
 383
 384   if (IsEqualGUID(&IID_IRpcProxyBuffer,riid)) {
 385     *obj = &This->IRpcProxyBuffer_iface;
 386     InterlockedIncrement(&This->RefCount);
 387     return S_OK;
 388   }
 389
 390   return E_NOINTERFACE;
 391 }
 392
 393 ULONG WINAPI StdProxy_AddRef(IRpcProxyBuffer *iface)
 394 {
 395   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 396   TRACE("(%p)->AddRef()\n",This);
 397
 398   return InterlockedIncrement(&This->RefCount);
 399 }
 400
 401 static ULONG WINAPI StdProxy_Release(LPRPCPROXYBUFFER iface)
 402 {
 403   ULONG refs;
 404   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 405   TRACE("(%p)->Release()\n",This);
 406
 407   refs = InterlockedDecrement(&This->RefCount);
 408   if (!refs)
 409   {
 410     if (This->pChannel)
 411       IRpcProxyBuffer_Disconnect(&This->IRpcProxyBuffer_iface);
 412
 413     if (This->base_object) IUnknown_Release( This->base_object );
 414     if (This->base_proxy) IRpcProxyBuffer_Release( This->base_proxy );
 415
 416     IPSFactoryBuffer_Release(This->pPSFactory);
 417     free(This);
 418   }
 419
 420   return refs;
 421 }
 422
 423 HRESULT WINAPI StdProxy_Connect(IRpcProxyBuffer *iface, IRpcChannelBuffer *pChannel)
 424 {
 425   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 426   TRACE("(%p)->Connect(%p)\n",This,pChannel);
 427
 428   This->pChannel = pChannel;
 429   IRpcChannelBuffer_AddRef(pChannel);
 430   if (This->base_proxy) IRpcProxyBuffer_Connect( This->base_proxy, pChannel );
 431   return S_OK;
 432 }
 433
 434 void WINAPI StdProxy_Disconnect(IRpcProxyBuffer *iface)
 435 {
 436   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 437   TRACE("(%p)->Disconnect()\n",This);
 438
 439   if (This->base_proxy) IRpcProxyBuffer_Disconnect( This->base_proxy );
 440
 441   IRpcChannelBuffer_Release(This->pChannel);
 442   This->pChannel = NULL;
 443 }
 444
 445 static const IRpcProxyBufferVtbl StdProxy_Vtbl =
 446 {
 447   StdProxy_QueryInterface,
 448   StdProxy_AddRef,
 449   StdProxy_Release,
 450   StdProxy_Connect,
 451   StdProxy_Disconnect
 452 };
 453
 454 static void StdProxy_GetChannel(LPVOID iface,
 455                                    LPRPCCHANNELBUFFER *ppChannel)
 456 {
 457   StdProxyImpl *This = impl_from_proxy_obj( iface );
 458   TRACE("(%p)->GetChannel(%p) %s\n",This,ppChannel,This->name);
 459
 460   if(This->pChannel)
 461     IRpcChannelBuffer_AddRef(This->pChannel);
 462
 463   *ppChannel = This->pChannel;
 464 }
 465
 466 static void StdProxy_GetIID(LPVOID iface,
 467                                const IID **ppiid)
 468 {
 469   StdProxyImpl *This = impl_from_proxy_obj( iface );
 470   TRACE("(%p)->GetIID(%p) %s\n",This,ppiid,This->name);
 471
 472   *ppiid = This->piid;
 473 }
 474
 475 HRESULT WINAPI IUnknown_QueryInterface_Proxy(LPUNKNOWN iface,
 476                                             REFIID riid,
 477                                             LPVOID *ppvObj)
 478 {
 479   StdProxyImpl *This = impl_from_proxy_obj( iface );
 480   TRACE("(%p)->QueryInterface(%s,%p) %s\n",This,debugstr_guid(riid),ppvObj,This->name);
 481   return IUnknown_QueryInterface(This->pUnkOuter,riid,ppvObj);
 482 }
 483
 484 ULONG WINAPI IUnknown_AddRef_Proxy(LPUNKNOWN iface)
 485 {
 486   StdProxyImpl *This = impl_from_proxy_obj( iface );
 487   TRACE("(%p)->AddRef() %s\n",This,This->name);
 488   return IUnknown_AddRef(This->pUnkOuter);
 489 }
 490
 491 ULONG WINAPI IUnknown_Release_Proxy(LPUNKNOWN iface)
 492 {
 493   StdProxyImpl *This = impl_from_proxy_obj( iface );
 494   TRACE("(%p)->Release() %s\n",This,This->name);
 495   return IUnknown_Release(This->pUnkOuter);
 496 }
 497
 498 /***********************************************************************
 499  *           NdrProxyInitialize [RPCRT4.@]
 500  */
 501 void WINAPI NdrProxyInitialize(void *This,
 502                               PRPC_MESSAGE pRpcMsg,
 503                               PMIDL_STUB_MESSAGE pStubMsg,
 504                               PMIDL_STUB_DESC pStubDescriptor,
 505                               unsigned int ProcNum)
 506 {
 507   TRACE("(%p,%p,%p,%p,%d)\n", This, pRpcMsg, pStubMsg, pStubDescriptor, ProcNum);
 508   NdrClientInitializeNew(pRpcMsg, pStubMsg, pStubDescriptor, ProcNum);
 509   StdProxy_GetChannel(This, &pStubMsg->pRpcChannelBuffer);
 510   if (!pStubMsg->pRpcChannelBuffer)
 511     RpcRaiseException(CO_E_OBJNOTCONNECTED);
 512   IRpcChannelBuffer_GetDestCtx(pStubMsg->pRpcChannelBuffer,
 513                                &pStubMsg->dwDestContext,
 514                                &pStubMsg->pvDestContext);
 515   TRACE("channel=%p\n", pStubMsg->pRpcChannelBuffer);
 516 }
 517
 518 /***********************************************************************
 519  *           NdrProxyGetBuffer [RPCRT4.@]
 520  */
 521 void WINAPI NdrProxyGetBuffer(void *This,
 522                              PMIDL_STUB_MESSAGE pStubMsg)
 523 {
 524   HRESULT hr;
 525   const IID *riid = NULL;
 526
 527   TRACE("(%p,%p)\n", This, pStubMsg);
 528   pStubMsg->RpcMsg->BufferLength = pStubMsg->BufferLength;
 529   pStubMsg->dwStubPhase = PROXY_GETBUFFER;
 530   StdProxy_GetIID(This, &riid);
 531   hr = IRpcChannelBuffer_GetBuffer(pStubMsg->pRpcChannelBuffer,
 532                                   (RPCOLEMESSAGE*)pStubMsg->RpcMsg,
 533                                   riid);
 534   if (FAILED(hr))
 535   {
 536     RpcRaiseException(hr);
 537     return;
 538   }
 539   pStubMsg->fBufferValid = TRUE;
 540   pStubMsg->BufferStart = pStubMsg->RpcMsg->Buffer;
 541   pStubMsg->BufferEnd = pStubMsg->BufferStart + pStubMsg->BufferLength;
 542   pStubMsg->Buffer = pStubMsg->BufferStart;
 543   pStubMsg->dwStubPhase = PROXY_MARSHAL;
 544 }
 545
 546 /***********************************************************************
 547  *           NdrProxySendReceive [RPCRT4.@]
 548  */
 549 void WINAPI NdrProxySendReceive(void *This,
 550                                PMIDL_STUB_MESSAGE pStubMsg)
 551 {
 552   ULONG Status = 0;
 553   HRESULT hr;
 554
 555   TRACE("(%p,%p)\n", This, pStubMsg);
 556
 557   if (!pStubMsg->pRpcChannelBuffer)
 558   {
 559     WARN("Trying to use disconnected proxy %p\n", This);
 560     RpcRaiseException(RPC_E_DISCONNECTED);
 561   }
 562
 563   pStubMsg->dwStubPhase = PROXY_SENDRECEIVE;
 564   /* avoid sending uninitialised parts of the buffer on the wire */
 565   pStubMsg->RpcMsg->BufferLength = pStubMsg->Buffer - (unsigned char *)pStubMsg->RpcMsg->Buffer;
 566   hr = IRpcChannelBuffer_SendReceive(pStubMsg->pRpcChannelBuffer,
 567                                     (RPCOLEMESSAGE*)pStubMsg->RpcMsg,
 568                                     &Status);
 569   pStubMsg->dwStubPhase = PROXY_UNMARSHAL;
 570   pStubMsg->BufferLength = pStubMsg->RpcMsg->BufferLength;
 571   pStubMsg->BufferStart = pStubMsg->RpcMsg->Buffer;
 572   pStubMsg->BufferEnd = pStubMsg->BufferStart + pStubMsg->BufferLength;
 573   pStubMsg->Buffer = pStubMsg->BufferStart;
 574
 575   /* raise exception if call failed */
 576   if (hr == RPC_S_CALL_FAILED) RpcRaiseException(*(DWORD*)pStubMsg->Buffer);
 577   else if (FAILED(hr)) RpcRaiseException(hr);
 578 }
 579
 580 /***********************************************************************
 581  *           NdrProxyFreeBuffer [RPCRT4.@]
 582  */
 583 void WINAPI NdrProxyFreeBuffer(void *This,
 584                               PMIDL_STUB_MESSAGE pStubMsg)
 585 {
 586   TRACE("(%p,%p)\n", This, pStubMsg);
 587
 588   if (pStubMsg->fBufferValid)
 589   {
 590     IRpcChannelBuffer_FreeBuffer(pStubMsg->pRpcChannelBuffer,
 591                                  (RPCOLEMESSAGE*)pStubMsg->RpcMsg);
 592     pStubMsg->fBufferValid = FALSE;
 593   }
 594   IRpcChannelBuffer_Release(pStubMsg->pRpcChannelBuffer);
 595   pStubMsg->pRpcChannelBuffer = NULL;
 596 }
 597
 598 /***********************************************************************
 599  *           NdrProxyErrorHandler [RPCRT4.@]
 600  */
 601 HRESULT WINAPI NdrProxyErrorHandler(DWORD dwExceptionCode)
 602 {
 603   WARN("(0x%08lx): a proxy call failed\n", dwExceptionCode);
 604
 605   if (FAILED(dwExceptionCode))
 606     return dwExceptionCode;
 607   else
 608     return HRESULT_FROM_WIN32(dwExceptionCode);
 609 }