dlls/ntdll/process.c

   1 /*
   2  * NT process handling
   3  *
   4  * Copyright 1996-1998 Marcus Meissner
   5  * Copyright 2018 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 <errno.h>
  23 #include <fcntl.h>
  24 #include <stdarg.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <time.h>
  29 #include <sys/types.h>
  30
  31 #include "ntstatus.h"
  32 #define WIN32_NO_STATUS
  33 #include "wine/debug.h"
  34 #include "windef.h"
  35 #include "winternl.h"
  36 #include "ntdll_misc.h"
  37 #include "wine/exception.h"
  38
  39 WINE_DEFAULT_DEBUG_CHANNEL(process);
  40
  41
  42 /******************************************************************************
  43  *  RtlGetCurrentPeb  [NTDLL.@]
  44  *
  45  */
  46 PEB * WINAPI RtlGetCurrentPeb(void)
  47 {
  48     return NtCurrentTeb()->Peb;
  49 }
  50
  51
  52 /******************************************************************
  53  *              RtlWow64EnableFsRedirection   (NTDLL.@)
  54  */
  55 NTSTATUS WINAPI RtlWow64EnableFsRedirection( BOOLEAN enable )
  56 {
  57     if (!NtCurrentTeb64()) return STATUS_NOT_IMPLEMENTED;
  58     NtCurrentTeb64()->TlsSlots[WOW64_TLS_FILESYSREDIR] = !enable;
  59     return STATUS_SUCCESS;
  60 }
  61
  62
  63 /******************************************************************
  64  *              RtlWow64EnableFsRedirectionEx   (NTDLL.@)
  65  */
  66 NTSTATUS WINAPI RtlWow64EnableFsRedirectionEx( ULONG disable, ULONG *old_value )
  67 {
  68     if (!NtCurrentTeb64()) return STATUS_NOT_IMPLEMENTED;
  69
  70     __TRY
  71     {
  72         *old_value = NtCurrentTeb64()->TlsSlots[WOW64_TLS_FILESYSREDIR];
  73     }
  74     __EXCEPT_PAGE_FAULT
  75     {
  76         return STATUS_ACCESS_VIOLATION;
  77     }
  78     __ENDTRY
  79
  80     NtCurrentTeb64()->TlsSlots[WOW64_TLS_FILESYSREDIR] = disable;
  81     return STATUS_SUCCESS;
  82 }
  83
  84
  85 /**********************************************************************
  86  *           RtlWow64GetCurrentMachine  (NTDLL.@)
  87  */
  88 USHORT WINAPI RtlWow64GetCurrentMachine(void)
  89 {
  90     USHORT current, native;
  91
  92     RtlWow64GetProcessMachines( GetCurrentProcess(), &current, &native );
  93     return current ? current : native;
  94 }
  95
  96
  97 /**********************************************************************
  98  *           RtlWow64GetProcessMachines  (NTDLL.@)
  99  */
 100 NTSTATUS WINAPI RtlWow64GetProcessMachines( HANDLE process, USHORT *current_ret, USHORT *native_ret )
 101 {
 102     ULONG i, machines[8];
 103     USHORT current = 0, native = 0;
 104     NTSTATUS status;
 105
 106     status = NtQuerySystemInformationEx( SystemSupportedProcessorArchitectures, &process, sizeof(process),
 107                                          machines, sizeof(machines), NULL );
 108     if (status) return status;
 109     for (i = 0; machines[i]; i++)
 110     {
 111         USHORT flags = HIWORD(machines[i]);
 112         USHORT machine = LOWORD(machines[i]);
 113         if (flags & 4 /* native machine */) native = machine;
 114         else if (flags & 8 /* current machine */) current = machine;
 115     }
 116     if (current_ret) *current_ret = current;
 117     if (native_ret) *native_ret = native;
 118     return status;
 119 }
 120
 121
 122 /**********************************************************************
 123  *           RtlWow64IsWowGuestMachineSupported  (NTDLL.@)
 124  */
 125 NTSTATUS WINAPI RtlWow64IsWowGuestMachineSupported( USHORT machine, BOOLEAN *supported )
 126 {
 127     ULONG i, machines[8];
 128     HANDLE process = 0;
 129     NTSTATUS status;
 130
 131     status = NtQuerySystemInformationEx( SystemSupportedProcessorArchitectures, &process, sizeof(process),
 132                                          machines, sizeof(machines), NULL );
 133     if (status) return status;
 134     *supported = FALSE;
 135     for (i = 0; machines[i]; i++)
 136     {
 137         if (HIWORD(machines[i]) & 4 /* native machine */) continue;
 138         if (machine == LOWORD(machines[i])) *supported = TRUE;
 139     }
 140     return status;
 141 }
 142
 143
 144 #ifdef _WIN64
 145
 146 /**********************************************************************
 147  *           RtlWow64GetCpuAreaInfo  (NTDLL.@)
 148  */
 149 NTSTATUS WINAPI RtlWow64GetCpuAreaInfo( WOW64_CPURESERVED *cpu, ULONG reserved, WOW64_CPU_AREA_INFO *info )
 150 {
 151     static const struct { ULONG machine, align, size, offset, flag; } data[] =
 152     {
 153 #define ENTRY(machine,type,flag) { machine, TYPE_ALIGNMENT(type), sizeof(type), offsetof(type,ContextFlags), flag },
 154         ENTRY( IMAGE_FILE_MACHINE_I386, I386_CONTEXT, CONTEXT_i386 )
 155         ENTRY( IMAGE_FILE_MACHINE_AMD64, AMD64_CONTEXT, CONTEXT_AMD64 )
 156         ENTRY( IMAGE_FILE_MACHINE_ARMNT, ARM_CONTEXT, CONTEXT_ARM )
 157         ENTRY( IMAGE_FILE_MACHINE_ARM64, ARM64_NT_CONTEXT, CONTEXT_ARM64 )
 158 #undef ENTRY
 159     };
 160     unsigned int i;
 161
 162     for (i = 0; i < ARRAY_SIZE(data); i++)
 163     {
 164 #define ALIGN(ptr,align) ((void *)(((ULONG_PTR)(ptr) + (align) - 1) & ~((align) - 1)))
 165         if (data[i].machine != cpu->Machine) continue;
 166         info->Context = ALIGN( cpu + 1, data[i].align );
 167         info->ContextEx = ALIGN( (char *)info->Context + data[i].size, sizeof(void *) );
 168         info->ContextFlagsLocation = (char *)info->Context + data[i].offset;
 169         info->ContextFlag = data[i].flag;
 170         info->CpuReserved = cpu;
 171         info->Machine = data[i].machine;
 172         return STATUS_SUCCESS;
 173 #undef ALIGN
 174     }
 175     return STATUS_INVALID_PARAMETER;
 176 }
 177
 178
 179 /**********************************************************************
 180  *           RtlWow64GetCurrentCpuArea  (NTDLL.@)
 181  */
 182 NTSTATUS WINAPI RtlWow64GetCurrentCpuArea( USHORT *machine, void **context, void **context_ex )
 183 {
 184     WOW64_CPU_AREA_INFO info;
 185     NTSTATUS status;
 186
 187     if (!(status = RtlWow64GetCpuAreaInfo( NtCurrentTeb()->TlsSlots[WOW64_TLS_CPURESERVED], 0, &info )))
 188     {
 189         if (machine) *machine = info.Machine;
 190         if (context) *context = info.Context;
 191         if (context_ex) *context_ex = *(void **)info.ContextEx;
 192     }
 193     return status;
 194 }
 195
 196
 197 /******************************************************************************
 198  *              RtlWow64GetThreadContext  (NTDLL.@)
 199  */
 200 NTSTATUS WINAPI RtlWow64GetThreadContext( HANDLE handle, WOW64_CONTEXT *context )
 201 {
 202     return NtQueryInformationThread( handle, ThreadWow64Context, context, sizeof(*context), NULL );
 203 }
 204
 205
 206 /******************************************************************************
 207  *              RtlWow64SetThreadContext  (NTDLL.@)
 208  */
 209 NTSTATUS WINAPI RtlWow64SetThreadContext( HANDLE handle, const WOW64_CONTEXT *context )
 210 {
 211     return NtSetInformationThread( handle, ThreadWow64Context, context, sizeof(*context) );
 212 }
 213
 214 /******************************************************************************
 215  *              RtlWow64GetThreadSelectorEntry  (NTDLL.@)
 216  */
 217 NTSTATUS WINAPI RtlWow64GetThreadSelectorEntry( HANDLE handle, THREAD_DESCRIPTOR_INFORMATION *info,
 218                                                 ULONG size, ULONG *retlen )
 219 {
 220     DWORD sel;
 221     WOW64_CONTEXT context = { WOW64_CONTEXT_CONTROL | WOW64_CONTEXT_SEGMENTS };
 222     LDT_ENTRY entry = { 0 };
 223
 224     if (size != sizeof(*info)) return STATUS_INFO_LENGTH_MISMATCH;
 225     if (RtlWow64GetThreadContext( handle, &context ))
 226     {
 227         /* hardcoded values */
 228         context.SegCs = 0x23;
 229 #ifdef __x86_64__
 230         __asm__( "movw %%fs,%0" : "=m" (context.SegFs) );
 231         __asm__( "movw %%ss,%0" : "=m" (context.SegSs) );
 232 #else
 233         context.SegSs = 0x2b;
 234         context.SegFs = 0x53;
 235 #endif
 236     }
 237
 238     sel = info->Selector | 3;
 239     if (sel == 0x03) goto done; /* null selector */
 240
 241     /* set common data */
 242     entry.HighWord.Bits.Dpl = 3;
 243     entry.HighWord.Bits.Pres = 1;
 244     entry.HighWord.Bits.Default_Big = 1;
 245     if (sel == context.SegCs)  /* code selector */
 246     {
 247         entry.LimitLow = 0xffff;
 248         entry.HighWord.Bits.LimitHi = 0xf;
 249         entry.HighWord.Bits.Type = 0x1b;  /* code */
 250         entry.HighWord.Bits.Granularity = 1;
 251     }
 252     else if (sel == context.SegSs)  /* data selector */
 253     {
 254         entry.LimitLow = 0xffff;
 255         entry.HighWord.Bits.LimitHi = 0xf;
 256         entry.HighWord.Bits.Type = 0x13;  /* data */
 257         entry.HighWord.Bits.Granularity = 1;
 258     }
 259     else if (sel == context.SegFs)  /* TEB selector */
 260     {
 261         THREAD_BASIC_INFORMATION tbi;
 262
 263         entry.LimitLow = 0xfff;
 264         entry.HighWord.Bits.Type = 0x13;  /* data */
 265         if (!NtQueryInformationThread( handle, ThreadBasicInformation, &tbi, sizeof(tbi), NULL ))
 266         {
 267             ULONG addr = (ULONG_PTR)tbi.TebBaseAddress + 0x2000;  /* 32-bit teb offset */
 268             entry.BaseLow = addr;
 269             entry.HighWord.Bytes.BaseMid = addr >> 16;
 270             entry.HighWord.Bytes.BaseHi  = addr >> 24;
 271         }
 272     }
 273     else return STATUS_UNSUCCESSFUL;
 274
 275 done:
 276     info->Entry = entry;
 277     if (retlen) *retlen = sizeof(entry);
 278     return STATUS_SUCCESS;
 279 }
 280
 281 #endif
 282
 283 /**********************************************************************
 284  *           RtlCreateUserProcess  (NTDLL.@)
 285  */
 286 NTSTATUS WINAPI RtlCreateUserProcess( UNICODE_STRING *path, ULONG attributes,
 287                                       RTL_USER_PROCESS_PARAMETERS *params,
 288                                       SECURITY_DESCRIPTOR *process_descr,
 289                                       SECURITY_DESCRIPTOR *thread_descr,
 290                                       HANDLE parent, BOOLEAN inherit, HANDLE debug, HANDLE token,
 291                                       RTL_USER_PROCESS_INFORMATION *info )
 292 {
 293     OBJECT_ATTRIBUTES process_attr, thread_attr;
 294     PS_CREATE_INFO create_info;
 295     ULONG_PTR buffer[offsetof( PS_ATTRIBUTE_LIST, Attributes[6] ) / sizeof(ULONG_PTR)];
 296     PS_ATTRIBUTE_LIST *attr = (PS_ATTRIBUTE_LIST *)buffer;
 297     UINT pos = 0;
 298
 299     RtlNormalizeProcessParams( params );
 300
 301     attr->Attributes[pos].Attribute    = PS_ATTRIBUTE_IMAGE_NAME;
 302     attr->Attributes[pos].Size         = path->Length;
 303     attr->Attributes[pos].ValuePtr     = path->Buffer;
 304     attr->Attributes[pos].ReturnLength = NULL;
 305     pos++;
 306     attr->Attributes[pos].Attribute    = PS_ATTRIBUTE_CLIENT_ID;
 307     attr->Attributes[pos].Size         = sizeof(info->ClientId);
 308     attr->Attributes[pos].ValuePtr     = &info->ClientId;
 309     attr->Attributes[pos].ReturnLength = NULL;
 310     pos++;
 311     attr->Attributes[pos].Attribute    = PS_ATTRIBUTE_IMAGE_INFO;
 312     attr->Attributes[pos].Size         = sizeof(info->ImageInformation);
 313     attr->Attributes[pos].ValuePtr     = &info->ImageInformation;
 314     attr->Attributes[pos].ReturnLength = NULL;
 315     pos++;
 316     if (parent)
 317     {
 318         attr->Attributes[pos].Attribute    = PS_ATTRIBUTE_PARENT_PROCESS;
 319         attr->Attributes[pos].Size         = sizeof(parent);
 320         attr->Attributes[pos].ValuePtr     = parent;
 321         attr->Attributes[pos].ReturnLength = NULL;
 322         pos++;
 323     }
 324     if (debug)
 325     {
 326         attr->Attributes[pos].Attribute    = PS_ATTRIBUTE_DEBUG_PORT;
 327         attr->Attributes[pos].Size         = sizeof(debug);
 328         attr->Attributes[pos].ValuePtr     = debug;
 329         attr->Attributes[pos].ReturnLength = NULL;
 330         pos++;
 331     }
 332     if (token)
 333     {
 334         attr->Attributes[pos].Attribute    = PS_ATTRIBUTE_TOKEN;
 335         attr->Attributes[pos].Size         = sizeof(token);
 336         attr->Attributes[pos].ValuePtr     = token;
 337         attr->Attributes[pos].ReturnLength = NULL;
 338         pos++;
 339     }
 340     attr->TotalLength = offsetof( PS_ATTRIBUTE_LIST, Attributes[pos] );
 341
 342     InitializeObjectAttributes( &process_attr, NULL, 0, NULL, process_descr );
 343     InitializeObjectAttributes( &thread_attr, NULL, 0, NULL, thread_descr );
 344
 345     return NtCreateUserProcess( &info->Process, &info->Thread, PROCESS_ALL_ACCESS, THREAD_ALL_ACCESS,
 346                                 &process_attr, &thread_attr,
 347                                 inherit ? PROCESS_CREATE_FLAGS_INHERIT_HANDLES : 0,
 348                                 THREAD_CREATE_FLAGS_CREATE_SUSPENDED, params,
 349                                 &create_info, attr );
 350 }
 351
 352 /***********************************************************************
 353  *      DbgUiGetThreadDebugObject (NTDLL.@)
 354  */
 355 HANDLE WINAPI DbgUiGetThreadDebugObject(void)
 356 {
 357     return NtCurrentTeb()->DbgSsReserved[1];
 358 }
 359
 360 /***********************************************************************
 361  *      DbgUiSetThreadDebugObject (NTDLL.@)
 362  */
 363 void WINAPI DbgUiSetThreadDebugObject( HANDLE handle )
 364 {
 365     NtCurrentTeb()->DbgSsReserved[1] = handle;
 366 }
 367
 368 /***********************************************************************
 369  *      DbgUiConnectToDbg (NTDLL.@)
 370  */
 371 NTSTATUS WINAPI DbgUiConnectToDbg(void)
 372 {
 373     HANDLE handle;
 374     NTSTATUS status;
 375     OBJECT_ATTRIBUTES attr = { sizeof(attr) };
 376
 377     if (DbgUiGetThreadDebugObject()) return STATUS_SUCCESS;  /* already connected */
 378
 379     status = NtCreateDebugObject( &handle, DEBUG_ALL_ACCESS, &attr, DEBUG_KILL_ON_CLOSE );
 380     if (!status) DbgUiSetThreadDebugObject( handle );
 381     return status;
 382 }
 383
 384 /***********************************************************************
 385  *      DbgUiDebugActiveProcess (NTDLL.@)
 386  */
 387 NTSTATUS WINAPI DbgUiDebugActiveProcess( HANDLE process )
 388 {
 389     NTSTATUS status;
 390
 391     if ((status = NtDebugActiveProcess( process, DbgUiGetThreadDebugObject() ))) return status;
 392     if ((status = DbgUiIssueRemoteBreakin( process ))) DbgUiStopDebugging( process );
 393     return status;
 394 }
 395
 396 /***********************************************************************
 397  *      DbgUiStopDebugging (NTDLL.@)
 398  */
 399 NTSTATUS WINAPI DbgUiStopDebugging( HANDLE process )
 400 {
 401     return NtRemoveProcessDebug( process, DbgUiGetThreadDebugObject() );
 402 }
 403
 404 /***********************************************************************
 405  *      DbgUiContinue (NTDLL.@)
 406  */
 407 NTSTATUS WINAPI DbgUiContinue( CLIENT_ID *client, NTSTATUS status )
 408 {
 409     return NtDebugContinue( DbgUiGetThreadDebugObject(), client, status );
 410 }
 411
 412 /***********************************************************************
 413  *      DbgUiWaitStateChange (NTDLL.@)
 414  */
 415 NTSTATUS WINAPI DbgUiWaitStateChange( DBGUI_WAIT_STATE_CHANGE *state, LARGE_INTEGER *timeout )
 416 {
 417     return NtWaitForDebugEvent( DbgUiGetThreadDebugObject(), TRUE, timeout, state );
 418 }
 419
 420 /* helper for DbgUiConvertStateChangeStructure */
 421 static inline void *get_thread_teb( HANDLE thread )
 422 {
 423     THREAD_BASIC_INFORMATION info;
 424
 425     if (NtQueryInformationThread( thread, ThreadBasicInformation, &info, sizeof(info), NULL )) return NULL;
 426     return info.TebBaseAddress;
 427 }
 428
 429 /***********************************************************************
 430  *      DbgUiConvertStateChangeStructure (NTDLL.@)
 431  */
 432 NTSTATUS WINAPI DbgUiConvertStateChangeStructure( DBGUI_WAIT_STATE_CHANGE *state, DEBUG_EVENT *event )
 433 {
 434     event->dwProcessId = HandleToULong( state->AppClientId.UniqueProcess );
 435     event->dwThreadId  = HandleToULong( state->AppClientId.UniqueThread );
 436     switch (state->NewState)
 437     {
 438     case DbgCreateThreadStateChange:
 439     {
 440         DBGUI_CREATE_THREAD *info = &state->StateInfo.CreateThread;
 441         event->dwDebugEventCode = CREATE_THREAD_DEBUG_EVENT;
 442         event->u.CreateThread.hThread           = info->HandleToThread;
 443         event->u.CreateThread.lpThreadLocalBase = get_thread_teb( info->HandleToThread );
 444         event->u.CreateThread.lpStartAddress    = info->NewThread.StartAddress;
 445         break;
 446     }
 447     case DbgCreateProcessStateChange:
 448     {
 449         DBGUI_CREATE_PROCESS *info = &state->StateInfo.CreateProcessInfo;
 450         event->dwDebugEventCode = CREATE_PROCESS_DEBUG_EVENT;
 451         event->u.CreateProcessInfo.hFile                 = info->NewProcess.FileHandle;
 452         event->u.CreateProcessInfo.hProcess              = info->HandleToProcess;
 453         event->u.CreateProcessInfo.hThread               = info->HandleToThread;
 454         event->u.CreateProcessInfo.lpBaseOfImage         = info->NewProcess.BaseOfImage;
 455         event->u.CreateProcessInfo.dwDebugInfoFileOffset = info->NewProcess.DebugInfoFileOffset;
 456         event->u.CreateProcessInfo.nDebugInfoSize        = info->NewProcess.DebugInfoSize;
 457         event->u.CreateProcessInfo.lpThreadLocalBase     = get_thread_teb( info->HandleToThread );
 458         event->u.CreateProcessInfo.lpStartAddress        = info->NewProcess.InitialThread.StartAddress;
 459         event->u.CreateProcessInfo.lpImageName           = NULL;
 460         event->u.CreateProcessInfo.fUnicode              = TRUE;
 461         break;
 462     }
 463     case DbgExitThreadStateChange:
 464     {
 465         DBGKM_EXIT_THREAD *info = &state->StateInfo.ExitThread;
 466         event->dwDebugEventCode = EXIT_THREAD_DEBUG_EVENT;
 467         event->u.ExitThread.dwExitCode = info->ExitStatus;
 468         break;
 469     }
 470     case DbgExitProcessStateChange:
 471     {
 472         DBGKM_EXIT_PROCESS *info = &state->StateInfo.ExitProcess;
 473         event->dwDebugEventCode = EXIT_PROCESS_DEBUG_EVENT;
 474         event->u.ExitProcess.dwExitCode = info->ExitStatus;
 475         break;
 476     }
 477     case DbgExceptionStateChange:
 478     case DbgBreakpointStateChange:
 479     case DbgSingleStepStateChange:
 480     {
 481         DBGKM_EXCEPTION *info = &state->StateInfo.Exception;
 482         DWORD code = info->ExceptionRecord.ExceptionCode;
 483         if (code == DBG_PRINTEXCEPTION_C && info->ExceptionRecord.NumberParameters >= 2)
 484         {
 485             event->dwDebugEventCode = OUTPUT_DEBUG_STRING_EVENT;
 486             event->u.DebugString.lpDebugStringData  = (void *)info->ExceptionRecord.ExceptionInformation[1];
 487             event->u.DebugString.fUnicode           = FALSE;
 488             event->u.DebugString.nDebugStringLength = info->ExceptionRecord.ExceptionInformation[0];
 489         }
 490         else if (code == DBG_RIPEXCEPTION && info->ExceptionRecord.NumberParameters >= 2)
 491         {
 492             event->dwDebugEventCode = RIP_EVENT;
 493             event->u.RipInfo.dwError = info->ExceptionRecord.ExceptionInformation[0];
 494             event->u.RipInfo.dwType  = info->ExceptionRecord.ExceptionInformation[1];
 495         }
 496         else
 497         {
 498             event->dwDebugEventCode = EXCEPTION_DEBUG_EVENT;
 499             event->u.Exception.ExceptionRecord = info->ExceptionRecord;
 500             event->u.Exception.dwFirstChance   = info->FirstChance;
 501         }
 502         break;
 503     }
 504     case DbgLoadDllStateChange:
 505     {
 506         DBGKM_LOAD_DLL *info = &state->StateInfo.LoadDll;
 507         event->dwDebugEventCode = LOAD_DLL_DEBUG_EVENT;
 508         event->u.LoadDll.hFile                 = info->FileHandle;
 509         event->u.LoadDll.lpBaseOfDll           = info->BaseOfDll;
 510         event->u.LoadDll.dwDebugInfoFileOffset = info->DebugInfoFileOffset;
 511         event->u.LoadDll.nDebugInfoSize        = info->DebugInfoSize;
 512         event->u.LoadDll.lpImageName           = info->NamePointer;
 513         event->u.LoadDll.fUnicode              = TRUE;
 514         break;
 515     }
 516     case DbgUnloadDllStateChange:
 517     {
 518         DBGKM_UNLOAD_DLL *info = &state->StateInfo.UnloadDll;
 519         event->dwDebugEventCode = UNLOAD_DLL_DEBUG_EVENT;
 520         event->u.UnloadDll.lpBaseOfDll = info->BaseAddress;
 521         break;
 522     }
 523     default:
 524         return STATUS_UNSUCCESSFUL;
 525     }
 526     return STATUS_SUCCESS;
 527 }
 528
 529 /***********************************************************************
 530  *      DbgUiRemoteBreakin (NTDLL.@)
 531  */
 532 void WINAPI DbgUiRemoteBreakin( void *arg )
 533 {
 534     TRACE( "\n" );
 535     if (NtCurrentTeb()->Peb->BeingDebugged)
 536     {
 537         __TRY
 538         {
 539             DbgBreakPoint();
 540         }
 541         __EXCEPT_ALL
 542         {
 543             /* do nothing */
 544         }
 545         __ENDTRY
 546     }
 547     RtlExitUserThread( STATUS_SUCCESS );
 548 }
 549
 550 /***********************************************************************
 551  *      DbgUiIssueRemoteBreakin (NTDLL.@)
 552  */
 553 NTSTATUS WINAPI DbgUiIssueRemoteBreakin( HANDLE process )
 554 {
 555     HANDLE handle;
 556     NTSTATUS status;
 557     OBJECT_ATTRIBUTES attr = { sizeof(attr) };
 558
 559     status = NtCreateThreadEx( &handle, THREAD_ALL_ACCESS, &attr, process,
 560                                DbgUiRemoteBreakin, NULL, 0, 0, 0, 0, NULL );
 561 #ifdef _WIN64
 562     /* FIXME: hack for debugging 32-bit wow64 process without a 64-bit ntdll */
 563     if (status == STATUS_INVALID_PARAMETER)
 564     {
 565         ULONG_PTR wow;
 566         if (!NtQueryInformationProcess( process, ProcessWow64Information, &wow, sizeof(wow), NULL ) && wow)
 567             status = NtCreateThreadEx( &handle, THREAD_ALL_ACCESS, &attr, process,
 568                                        (void *)0x7ffe1000, NULL, 0, 0, 0, 0, NULL );
 569     }
 570 #endif
 571     if (!status) NtClose( handle );
 572     return status;
 573 }