dlls/ntdll/process.c

   1 /*
   2  * NT basis DLL
   3  *
   4  * This file contains the Nt* API functions of NTDLL.DLL.
   5  * In the original ntdll.dll they all seem to just call int 0x2e (down to the NTOSKRNL)
   6  *
   7  * Copyright 1996-1998 Marcus Meissner
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  */
  23
  24 #include <stdarg.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <time.h>
  29
  30 #include "ntstatus.h"
  31 #define WIN32_NO_STATUS
  32 #include "wine/debug.h"
  33 #include "windef.h"
  34 #include "winternl.h"
  35 #include "ntdll_misc.h"
  36 #include "wine/server.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(ntdll);
  39
  40 static ULONG execute_flags = MEM_EXECUTE_OPTION_DISABLE;
  41
  42 /*
  43  *      Process object
  44  */
  45
  46 /******************************************************************************
  47  *  NtTerminateProcess                  [NTDLL.@]
  48  *
  49  *  Native applications must kill themselves when done
  50  */
  51 NTSTATUS WINAPI NtTerminateProcess( HANDLE handle, LONG exit_code )
  52 {
  53     NTSTATUS ret;
  54     BOOL self;
  55     SERVER_START_REQ( terminate_process )
  56     {
  57         req->handle    = wine_server_obj_handle( handle );
  58         req->exit_code = exit_code;
  59         ret = wine_server_call( req );
  60         self = !ret && reply->self;
  61     }
  62     SERVER_END_REQ;
  63     if (self && handle) exit( exit_code );
  64     return ret;
  65 }
  66
  67 /******************************************************************************
  68  *  RtlGetCurrentPeb  [NTDLL.@]
  69  *
  70  */
  71 PEB * WINAPI RtlGetCurrentPeb(void)
  72 {
  73     return NtCurrentTeb()->Peb;
  74 }
  75
  76 /***********************************************************************
  77  *           __wine_make_process_system   (NTDLL.@)
  78  *
  79  * Mark the current process as a system process.
  80  * Returns the event that is signaled when all non-system processes have exited.
  81  */
  82 HANDLE CDECL __wine_make_process_system(void)
  83 {
  84     HANDLE ret = 0;
  85     SERVER_START_REQ( make_process_system )
  86     {
  87         if (!wine_server_call( req )) ret = wine_server_ptr_handle( reply->event );
  88     }
  89     SERVER_END_REQ;
  90     return ret;
  91 }
  92
  93 static UINT process_error_mode;
  94
  95 #define UNIMPLEMENTED_INFO_CLASS(c) \
  96     case c: \
  97         FIXME("(process=%p) Unimplemented information class: " #c "\n", ProcessHandle); \
  98         ret = STATUS_INVALID_INFO_CLASS; \
  99         break
 100
 101 ULONG_PTR get_system_affinity_mask(void)
 102 {
 103     ULONG num_cpus = NtCurrentTeb()->Peb->NumberOfProcessors;
 104     if (num_cpus >= sizeof(ULONG_PTR) * 8) return ~(ULONG_PTR)0;
 105     return ((ULONG_PTR)1 << num_cpus) - 1;
 106 }
 107
 108 /******************************************************************************
 109 *  NtQueryInformationProcess            [NTDLL.@]
 110 *  ZwQueryInformationProcess            [NTDLL.@]
 111 *
 112 */
 113 NTSTATUS WINAPI NtQueryInformationProcess(
 114         IN HANDLE ProcessHandle,
 115         IN PROCESSINFOCLASS ProcessInformationClass,
 116         OUT PVOID ProcessInformation,
 117         IN ULONG ProcessInformationLength,
 118         OUT PULONG ReturnLength)
 119 {
 120     NTSTATUS ret = STATUS_SUCCESS;
 121     ULONG len = 0;
 122
 123     TRACE("(%p,0x%08x,%p,0x%08x,%p)\n",
 124           ProcessHandle,ProcessInformationClass,
 125           ProcessInformation,ProcessInformationLength,
 126           ReturnLength);
 127
 128     switch (ProcessInformationClass)
 129     {
 130     UNIMPLEMENTED_INFO_CLASS(ProcessQuotaLimits);
 131     UNIMPLEMENTED_INFO_CLASS(ProcessBasePriority);
 132     UNIMPLEMENTED_INFO_CLASS(ProcessRaisePriority);
 133     UNIMPLEMENTED_INFO_CLASS(ProcessExceptionPort);
 134     UNIMPLEMENTED_INFO_CLASS(ProcessAccessToken);
 135     UNIMPLEMENTED_INFO_CLASS(ProcessLdtInformation);
 136     UNIMPLEMENTED_INFO_CLASS(ProcessLdtSize);
 137     UNIMPLEMENTED_INFO_CLASS(ProcessIoPortHandlers);
 138     UNIMPLEMENTED_INFO_CLASS(ProcessPooledUsageAndLimits);
 139     UNIMPLEMENTED_INFO_CLASS(ProcessWorkingSetWatch);
 140     UNIMPLEMENTED_INFO_CLASS(ProcessUserModeIOPL);
 141     UNIMPLEMENTED_INFO_CLASS(ProcessEnableAlignmentFaultFixup);
 142     UNIMPLEMENTED_INFO_CLASS(ProcessPriorityClass);
 143     UNIMPLEMENTED_INFO_CLASS(ProcessWx86Information);
 144     UNIMPLEMENTED_INFO_CLASS(ProcessPriorityBoost);
 145     UNIMPLEMENTED_INFO_CLASS(ProcessDeviceMap);
 146     UNIMPLEMENTED_INFO_CLASS(ProcessSessionInformation);
 147     UNIMPLEMENTED_INFO_CLASS(ProcessForegroundInformation);
 148     UNIMPLEMENTED_INFO_CLASS(ProcessLUIDDeviceMapsEnabled);
 149     UNIMPLEMENTED_INFO_CLASS(ProcessBreakOnTermination);
 150     UNIMPLEMENTED_INFO_CLASS(ProcessHandleTracing);
 151
 152     case ProcessBasicInformation:
 153         {
 154             PROCESS_BASIC_INFORMATION pbi;
 155             const ULONG_PTR affinity_mask = get_system_affinity_mask();
 156
 157             if (ProcessInformationLength >= sizeof(PROCESS_BASIC_INFORMATION))
 158             {
 159                 if (!ProcessInformation)
 160                     ret = STATUS_ACCESS_VIOLATION;
 161                 else if (!ProcessHandle)
 162                     ret = STATUS_INVALID_HANDLE;
 163                 else
 164                 {
 165                     SERVER_START_REQ(get_process_info)
 166                     {
 167                         req->handle = wine_server_obj_handle( ProcessHandle );
 168                         if ((ret = wine_server_call( req )) == STATUS_SUCCESS)
 169                         {
 170                             pbi.ExitStatus = reply->exit_code;
 171                             pbi.PebBaseAddress = wine_server_get_ptr( reply->peb );
 172                             pbi.AffinityMask = reply->affinity & affinity_mask;
 173                             pbi.BasePriority = reply->priority;
 174                             pbi.UniqueProcessId = reply->pid;
 175                             pbi.InheritedFromUniqueProcessId = reply->ppid;
 176                         }
 177                     }
 178                     SERVER_END_REQ;
 179
 180                     memcpy(ProcessInformation, &pbi, sizeof(PROCESS_BASIC_INFORMATION));
 181
 182                     len = sizeof(PROCESS_BASIC_INFORMATION);
 183                 }
 184
 185                 if (ProcessInformationLength > sizeof(PROCESS_BASIC_INFORMATION))
 186                     ret = STATUS_INFO_LENGTH_MISMATCH;
 187             }
 188             else
 189             {
 190                 len = sizeof(PROCESS_BASIC_INFORMATION);
 191                 ret = STATUS_INFO_LENGTH_MISMATCH;
 192             }
 193         }
 194         break;
 195     case ProcessIoCounters:
 196         {
 197             IO_COUNTERS pii;
 198
 199             if (ProcessInformationLength >= sizeof(IO_COUNTERS))
 200             {
 201                 if (!ProcessInformation)
 202                     ret = STATUS_ACCESS_VIOLATION;
 203                 else if (!ProcessHandle)
 204                     ret = STATUS_INVALID_HANDLE;
 205                 else
 206                 {
 207                     /* FIXME : real data */
 208                     memset(&pii, 0 , sizeof(IO_COUNTERS));
 209
 210                     memcpy(ProcessInformation, &pii, sizeof(IO_COUNTERS));
 211
 212                     len = sizeof(IO_COUNTERS);
 213                 }
 214
 215                 if (ProcessInformationLength > sizeof(IO_COUNTERS))
 216                     ret = STATUS_INFO_LENGTH_MISMATCH;
 217             }
 218             else
 219             {
 220                 len = sizeof(IO_COUNTERS);
 221                 ret = STATUS_INFO_LENGTH_MISMATCH;
 222             }
 223         }
 224         break;
 225     case ProcessVmCounters:
 226         {
 227             VM_COUNTERS pvmi;
 228
 229             /* older Windows versions don't have the PrivatePageCount field */
 230             if (ProcessInformationLength >= FIELD_OFFSET(VM_COUNTERS,PrivatePageCount))
 231             {
 232                 if (!ProcessInformation)
 233                     ret = STATUS_ACCESS_VIOLATION;
 234                 else if (!ProcessHandle)
 235                     ret = STATUS_INVALID_HANDLE;
 236                 else
 237                 {
 238                     /* FIXME : real data */
 239                     memset(&pvmi, 0 , sizeof(VM_COUNTERS));
 240
 241                     len = ProcessInformationLength;
 242                     if (len != FIELD_OFFSET(VM_COUNTERS,PrivatePageCount)) len = sizeof(VM_COUNTERS);
 243
 244                     memcpy(ProcessInformation, &pvmi, min(ProcessInformationLength,sizeof(VM_COUNTERS)));
 245                 }
 246
 247                 if (ProcessInformationLength != FIELD_OFFSET(VM_COUNTERS,PrivatePageCount) &&
 248                     ProcessInformationLength != sizeof(VM_COUNTERS))
 249                     ret = STATUS_INFO_LENGTH_MISMATCH;
 250             }
 251             else
 252             {
 253                 len = sizeof(pvmi);
 254                 ret = STATUS_INFO_LENGTH_MISMATCH;
 255             }
 256         }
 257         break;
 258     case ProcessTimes:
 259         {
 260             KERNEL_USER_TIMES pti;
 261
 262             if (ProcessInformationLength >= sizeof(KERNEL_USER_TIMES))
 263             {
 264                 if (!ProcessInformation)
 265                     ret = STATUS_ACCESS_VIOLATION;
 266                 else if (!ProcessHandle)
 267                     ret = STATUS_INVALID_HANDLE;
 268                 else
 269                 {
 270                     /* FIXME : User- and KernelTime have to be implemented */
 271                     memset(&pti, 0, sizeof(KERNEL_USER_TIMES));
 272
 273                     SERVER_START_REQ(get_process_info)
 274                     {
 275                       req->handle = wine_server_obj_handle( ProcessHandle );
 276                       if ((ret = wine_server_call( req )) == STATUS_SUCCESS)
 277                       {
 278                           pti.CreateTime.QuadPart = reply->start_time;
 279                           pti.ExitTime.QuadPart = reply->end_time;
 280                       }
 281                     }
 282                     SERVER_END_REQ;
 283
 284                     memcpy(ProcessInformation, &pti, sizeof(KERNEL_USER_TIMES));
 285                     len = sizeof(KERNEL_USER_TIMES);
 286                 }
 287
 288                 if (ProcessInformationLength > sizeof(KERNEL_USER_TIMES))
 289                     ret = STATUS_INFO_LENGTH_MISMATCH;
 290             }
 291             else
 292             {
 293                 len = sizeof(KERNEL_USER_TIMES);
 294                 ret = STATUS_INFO_LENGTH_MISMATCH;
 295             }
 296         }
 297         break;
 298     case ProcessDebugPort:
 299         len = sizeof(DWORD_PTR);
 300         if (ProcessInformationLength == len)
 301         {
 302             if (!ProcessInformation)
 303                 ret = STATUS_ACCESS_VIOLATION;
 304             else if (!ProcessHandle)
 305                 ret = STATUS_INVALID_HANDLE;
 306             else
 307             {
 308                 SERVER_START_REQ(get_process_info)
 309                 {
 310                     req->handle = wine_server_obj_handle( ProcessHandle );
 311                     if ((ret = wine_server_call( req )) == STATUS_SUCCESS)
 312                     {
 313                         *(DWORD_PTR *)ProcessInformation = reply->debugger_present ? ~(DWORD_PTR)0 : 0;
 314                     }
 315                 }
 316                 SERVER_END_REQ;
 317             }
 318         }
 319         else
 320             ret = STATUS_INFO_LENGTH_MISMATCH;
 321         break;
 322     case ProcessDebugFlags:
 323         len = sizeof(DWORD);
 324         if (ProcessInformationLength == len)
 325         {
 326             if (!ProcessInformation)
 327                 ret = STATUS_ACCESS_VIOLATION;
 328             else if (!ProcessHandle)
 329                 ret = STATUS_INVALID_HANDLE;
 330             else
 331             {
 332                 SERVER_START_REQ(get_process_info)
 333                 {
 334                     req->handle = wine_server_obj_handle( ProcessHandle );
 335                     if ((ret = wine_server_call( req )) == STATUS_SUCCESS)
 336                     {
 337                         *(DWORD *)ProcessInformation = !reply->debugger_present;
 338                     }
 339                 }
 340                 SERVER_END_REQ;
 341             }
 342         }
 343         else
 344             ret = STATUS_INFO_LENGTH_MISMATCH;
 345         break;
 346     case ProcessDefaultHardErrorMode:
 347         len = sizeof(process_error_mode);
 348         if (ProcessInformationLength == len)
 349             memcpy(ProcessInformation, &process_error_mode, len);
 350         else
 351             ret = STATUS_INFO_LENGTH_MISMATCH;
 352         break;
 353     case ProcessDebugObjectHandle:
 354         /* "These are not the debuggers you are looking for." *
 355          * set it to 0 aka "no debugger" to satisfy copy protections */
 356         len = sizeof(HANDLE);
 357         if (ProcessInformationLength == len)
 358         {
 359             if (!ProcessInformation)
 360                 ret = STATUS_ACCESS_VIOLATION;
 361             else if (!ProcessHandle)
 362                 ret = STATUS_INVALID_HANDLE;
 363             else
 364             {
 365                 memset(ProcessInformation, 0, ProcessInformationLength);
 366                 ret = STATUS_PORT_NOT_SET;
 367             }
 368         }
 369         else
 370             ret = STATUS_INFO_LENGTH_MISMATCH;
 371         break;
 372     case ProcessHandleCount:
 373         if (ProcessInformationLength >= 4)
 374         {
 375             if (!ProcessInformation)
 376                 ret = STATUS_ACCESS_VIOLATION;
 377             else if (!ProcessHandle)
 378                 ret = STATUS_INVALID_HANDLE;
 379             else
 380             {
 381                 memset(ProcessInformation, 0, 4);
 382                 len = 4;
 383             }
 384
 385             if (ProcessInformationLength > 4)
 386                 ret = STATUS_INFO_LENGTH_MISMATCH;
 387         }
 388         else
 389         {
 390             len = 4;
 391             ret = STATUS_INFO_LENGTH_MISMATCH;
 392         }
 393         break;
 394
 395     case ProcessAffinityMask:
 396         len = sizeof(ULONG_PTR);
 397         if (ProcessInformationLength == len)
 398         {
 399             const ULONG_PTR system_mask = get_system_affinity_mask();
 400
 401             SERVER_START_REQ(get_process_info)
 402             {
 403                 req->handle = wine_server_obj_handle( ProcessHandle );
 404                 if (!(ret = wine_server_call( req )))
 405                     *(ULONG_PTR *)ProcessInformation = reply->affinity & system_mask;
 406             }
 407             SERVER_END_REQ;
 408         }
 409         else ret = STATUS_INFO_LENGTH_MISMATCH;
 410         break;
 411
 412     case ProcessWow64Information:
 413         len = sizeof(ULONG_PTR);
 414         if (ProcessInformationLength != len) ret = STATUS_INFO_LENGTH_MISMATCH;
 415         else if (!ProcessInformation) ret = STATUS_ACCESS_VIOLATION;
 416         else if(!ProcessHandle) ret = STATUS_INVALID_HANDLE;
 417         else
 418         {
 419             ULONG_PTR val = 0;
 420
 421             if (ProcessHandle == GetCurrentProcess()) val = is_wow64;
 422             else if (server_cpus & ((1 << CPU_x86_64) | (1 << CPU_ARM64)))
 423             {
 424                 SERVER_START_REQ( get_process_info )
 425                 {
 426                     req->handle = wine_server_obj_handle( ProcessHandle );
 427                     if (!(ret = wine_server_call( req )))
 428                         val = (reply->cpu != CPU_x86_64 && reply->cpu != CPU_ARM64);
 429                 }
 430                 SERVER_END_REQ;
 431             }
 432             *(ULONG_PTR *)ProcessInformation = val;
 433         }
 434         break;
 435     case ProcessImageFileName:
 436         /* FIXME: this will return a DOS path. Windows returns an NT path. Changing this would require also changing kernel32.QueryFullProcessImageName.
 437          * The latter may be harder because of the lack of RtlNtPathNameToDosPathName. */
 438         SERVER_START_REQ(get_dll_info)
 439         {
 440             UNICODE_STRING *image_file_name_str = ProcessInformation;
 441
 442             req->handle = wine_server_obj_handle( ProcessHandle );
 443             req->base_address = 0; /* main module */
 444             wine_server_set_reply( req, image_file_name_str ? image_file_name_str + 1 : NULL,
 445                                    ProcessInformationLength > sizeof(UNICODE_STRING) ? ProcessInformationLength - sizeof(UNICODE_STRING) : 0 );
 446             ret = wine_server_call( req );
 447             if (ret == STATUS_BUFFER_TOO_SMALL) ret = STATUS_INFO_LENGTH_MISMATCH;
 448
 449             len = sizeof(UNICODE_STRING) + reply->filename_len;
 450             if (ret == STATUS_SUCCESS)
 451             {
 452                 image_file_name_str->MaximumLength = image_file_name_str->Length = reply->filename_len;
 453                 image_file_name_str->Buffer = (PWSTR)(image_file_name_str + 1);
 454             }
 455         }
 456         SERVER_END_REQ;
 457         break;
 458     case ProcessExecuteFlags:
 459         len = sizeof(ULONG);
 460         if (ProcessInformationLength == len)
 461             *(ULONG *)ProcessInformation = execute_flags;
 462         else
 463             ret = STATUS_INFO_LENGTH_MISMATCH;
 464         break;
 465     default:
 466         FIXME("(%p,info_class=%d,%p,0x%08x,%p) Unknown information class\n",
 467               ProcessHandle,ProcessInformationClass,
 468               ProcessInformation,ProcessInformationLength,
 469               ReturnLength);
 470         ret = STATUS_INVALID_INFO_CLASS;
 471         break;
 472     }
 473
 474     if (ReturnLength) *ReturnLength = len;
 475
 476     return ret;
 477 }
 478
 479 /******************************************************************************
 480  * NtSetInformationProcess [NTDLL.@]
 481  * ZwSetInformationProcess [NTDLL.@]
 482  */
 483 NTSTATUS WINAPI NtSetInformationProcess(
 484         IN HANDLE ProcessHandle,
 485         IN PROCESSINFOCLASS ProcessInformationClass,
 486         IN PVOID ProcessInformation,
 487         IN ULONG ProcessInformationLength)
 488 {
 489     NTSTATUS ret = STATUS_SUCCESS;
 490
 491     switch (ProcessInformationClass)
 492     {
 493     case ProcessDefaultHardErrorMode:
 494         if (ProcessInformationLength != sizeof(UINT)) return STATUS_INVALID_PARAMETER;
 495         process_error_mode = *(UINT *)ProcessInformation;
 496         break;
 497     case ProcessAffinityMask:
 498     {
 499         const ULONG_PTR system_mask = get_system_affinity_mask();
 500
 501         if (ProcessInformationLength != sizeof(DWORD_PTR)) return STATUS_INVALID_PARAMETER;
 502         if (*(PDWORD_PTR)ProcessInformation & ~system_mask)
 503             return STATUS_INVALID_PARAMETER;
 504         if (!*(PDWORD_PTR)ProcessInformation)
 505             return STATUS_INVALID_PARAMETER;
 506         SERVER_START_REQ( set_process_info )
 507         {
 508             req->handle   = wine_server_obj_handle( ProcessHandle );
 509             req->affinity = *(PDWORD_PTR)ProcessInformation;
 510             req->mask     = SET_PROCESS_INFO_AFFINITY;
 511             ret = wine_server_call( req );
 512         }
 513         SERVER_END_REQ;
 514         break;
 515     }
 516     case ProcessPriorityClass:
 517         if (ProcessInformationLength != sizeof(PROCESS_PRIORITY_CLASS))
 518             return STATUS_INVALID_PARAMETER;
 519         else
 520         {
 521             PROCESS_PRIORITY_CLASS* ppc = ProcessInformation;
 522
 523             SERVER_START_REQ( set_process_info )
 524             {
 525                 req->handle   = wine_server_obj_handle( ProcessHandle );
 526                 /* FIXME Foreground isn't used */
 527                 req->priority = ppc->PriorityClass;
 528                 req->mask     = SET_PROCESS_INFO_PRIORITY;
 529                 ret = wine_server_call( req );
 530             }
 531             SERVER_END_REQ;
 532         }
 533         break;
 534
 535     case ProcessExecuteFlags:
 536         if (ProcessInformationLength != sizeof(ULONG))
 537             return STATUS_INVALID_PARAMETER;
 538         else if (execute_flags & MEM_EXECUTE_OPTION_PERMANENT)
 539             return STATUS_ACCESS_DENIED;
 540         else
 541         {
 542             BOOL enable;
 543             switch (*(ULONG *)ProcessInformation & (MEM_EXECUTE_OPTION_ENABLE|MEM_EXECUTE_OPTION_DISABLE))
 544             {
 545             case MEM_EXECUTE_OPTION_ENABLE:
 546                 enable = TRUE;
 547                 break;
 548             case MEM_EXECUTE_OPTION_DISABLE:
 549                 enable = FALSE;
 550                 break;
 551             default:
 552                 return STATUS_INVALID_PARAMETER;
 553             }
 554             execute_flags = *(ULONG *)ProcessInformation;
 555             VIRTUAL_SetForceExec( enable );
 556         }
 557         break;
 558
 559     default:
 560         FIXME("(%p,0x%08x,%p,0x%08x) stub\n",
 561               ProcessHandle,ProcessInformationClass,ProcessInformation,
 562               ProcessInformationLength);
 563         ret = STATUS_NOT_IMPLEMENTED;
 564         break;
 565     }
 566     return ret;
 567 }
 568
 569 /******************************************************************************
 570  * NtFlushInstructionCache [NTDLL.@]
 571  * ZwFlushInstructionCache [NTDLL.@]
 572  */
 573 NTSTATUS WINAPI NtFlushInstructionCache(
 574         IN HANDLE ProcessHandle,
 575         IN LPCVOID BaseAddress,
 576         IN SIZE_T Size)
 577 {
 578     static int once;
 579     if (!once++)
 580     {
 581 #if defined(__x86_64__) || defined(__i386__)
 582         TRACE("%p %p %ld - no-op on x86 and x86_64\n", ProcessHandle, BaseAddress, Size );
 583 #else
 584         FIXME("%p %p %ld\n", ProcessHandle, BaseAddress, Size );
 585 #endif
 586     }
 587     return STATUS_SUCCESS;
 588 }
 589
 590 /******************************************************************
 591  *              NtOpenProcess [NTDLL.@]
 592  *              ZwOpenProcess [NTDLL.@]
 593  */
 594 NTSTATUS  WINAPI NtOpenProcess(PHANDLE handle, ACCESS_MASK access,
 595                                const OBJECT_ATTRIBUTES* attr, const CLIENT_ID* cid)
 596 {
 597     NTSTATUS    status;
 598
 599     SERVER_START_REQ( open_process )
 600     {
 601         req->pid        = HandleToULong(cid->UniqueProcess);
 602         req->access     = access;
 603         req->attributes = attr ? attr->Attributes : 0;
 604         status = wine_server_call( req );
 605         if (!status) *handle = wine_server_ptr_handle( reply->handle );
 606     }
 607     SERVER_END_REQ;
 608     return status;
 609 }