reactos/dll/win32/kernel32/misc/dllmain.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS system libraries
   5  * FILE:            lib/kernel32/misc/dllmain.c
   6  * PURPOSE:         Initialization
   7  * PROGRAMMER:      Ariadne ( ariadne@xs4all.nl)
   8  * UPDATE HISTORY:
   9  *                  Created 01/11/98
  10  */
  11
  12 /* INCLUDES ******************************************************************/
  13
  14 #include <k32.h>
  15
  16 #define NDEBUG
  17 #include "../include/debug.h"
  18
  19 /* GLOBALS *******************************************************************/
  20
  21 extern UNICODE_STRING SystemDirectory;
  22 extern UNICODE_STRING WindowsDirectory;
  23
  24 HANDLE hProcessHeap = NULL;
  25 HMODULE hCurrentModule = NULL;
  26 HANDLE hBaseDir = NULL;
  27 PPEB Peb;
  28 ULONG SessionId;
  29
  30 static BOOL DllInitialized = FALSE;
  31 static BOOL ConsoleInitialized = FALSE;
  32
  33 BOOL STDCALL
  34 DllMain(HANDLE hInst,
  35         DWORD dwReason,
  36         LPVOID lpReserved);
  37
  38 /* Critical section for various kernel32 data structures */
  39 RTL_CRITICAL_SECTION DllLock;
  40 RTL_CRITICAL_SECTION ConsoleLock;
  41
  42 extern BOOL WINAPI DefaultConsoleCtrlHandler(DWORD Event);
  43 extern __declspec(noreturn) VOID CALLBACK ConsoleControlDispatcher(DWORD CodeAndFlag);
  44
  45 extern BOOL FASTCALL NlsInit();
  46 extern VOID FASTCALL NlsUninit();
  47 BOOLEAN InWindows = FALSE;
  48
  49 HANDLE
  50 STDCALL
  51 DuplicateConsoleHandle(HANDLE hConsole,
  52                        DWORD dwDesiredAccess,
  53                        BOOL     bInheritHandle,
  54                        DWORD dwOptions);
  55
  56 #define WIN_OBJ_DIR L"\\Windows"
  57 #define SESSION_DIR L"\\Sessions"
  58
  59 /* FUNCTIONS *****************************************************************/
  60
  61 NTSTATUS
  62 WINAPI
  63 OpenBaseDirectory(PHANDLE DirHandle)
  64 {
  65     OBJECT_ATTRIBUTES ObjectAttributes;
  66     UNICODE_STRING Name = RTL_CONSTANT_STRING(L"\\BaseNamedObjects");
  67     NTSTATUS Status;
  68
  69     InitializeObjectAttributes(&ObjectAttributes,
  70                                &Name,
  71                                OBJ_CASE_INSENSITIVE,
  72                                NULL,
  73                                NULL);
  74
  75     Status = NtOpenDirectoryObject(DirHandle,
  76                                    DIRECTORY_ALL_ACCESS &
  77                                    ~(DELETE | WRITE_DAC | WRITE_OWNER),
  78                                    &ObjectAttributes);
  79     if (!NT_SUCCESS(Status))
  80     {
  81         /* FIXME: It's not our job to create the BNO directory, csr does it */
  82         Status = NtCreateDirectoryObject(DirHandle,
  83                                          DIRECTORY_ALL_ACCESS,
  84                                          &ObjectAttributes);
  85         if (!NT_SUCCESS(Status))
  86         {
  87             DPRINT1("NtCreateDirectoryObject() failed\n");
  88         }
  89     }
  90
  91     DPRINT("Opened BNO: %lx\n", *DirHandle);
  92     return Status;
  93 }
  94
  95 /*
  96  * @unimplemented
  97  */
  98 BOOL
  99 WINAPI
 100 BaseQueryModuleData(IN LPSTR ModuleName,
 101                     IN LPSTR Unknown,
 102                     IN PVOID Unknown2,
 103                     IN PVOID Unknown3,
 104                     IN PVOID Unknown4)
 105 {
 106     DPRINT1("BaseQueryModuleData called: %s %s %x %x %x\n",
 107             ModuleName,
 108             Unknown,
 109             Unknown2,
 110             Unknown3,
 111             Unknown4);
 112     return FALSE;
 113 }
 114
 115 /*
 116  * @unimplemented
 117  */
 118 NTSTATUS
 119 WINAPI
 120 BaseProcessInitPostImport(VOID)
 121 {
 122     /* FIXME: Initialize TS pointers */
 123     return STATUS_SUCCESS;
 124 }
 125
 126 BOOL
 127 STDCALL
 128 BasepInitConsole(VOID)
 129 {
 130     CSR_API_MESSAGE Request;
 131     ULONG CsrRequest;
 132     NTSTATUS Status;
 133     PRTL_USER_PROCESS_PARAMETERS Parameters = NtCurrentPeb()->ProcessParameters;
 134
 135     WCHAR lpTest[MAX_PATH];
 136     GetModuleFileNameW(NULL, lpTest, MAX_PATH);
 137     DPRINT("BasepInitConsole for : %S\n", lpTest);
 138     DPRINT("Our current console handles are: %lx, %lx, %lx %lx\n",
 139            Parameters->ConsoleHandle, Parameters->StandardInput,
 140            Parameters->StandardOutput, Parameters->StandardError);
 141
 142     /* We have nothing to do if this isn't a console app... */
 143     if (RtlImageNtHeader(GetModuleHandle(NULL))->OptionalHeader.Subsystem !=
 144         IMAGE_SUBSYSTEM_WINDOWS_CUI)
 145     {
 146         DPRINT("Image is not a console application\n");
 147         Parameters->ConsoleHandle = NULL;
 148         return TRUE;
 149     }
 150
 151     /* Assume one is needed */
 152     Request.Data.AllocConsoleRequest.ConsoleNeeded = TRUE;
 153
 154     /* Handle the special flags given to us by BasepInitializeEnvironment */
 155     if (Parameters->ConsoleHandle == HANDLE_DETACHED_PROCESS)
 156     {
 157         /* No console to create */
 158         DPRINT("No console to create\n");
 159         Parameters->ConsoleHandle = NULL;
 160         Request.Data.AllocConsoleRequest.ConsoleNeeded = FALSE;
 161     }
 162     else if (Parameters->ConsoleHandle == HANDLE_CREATE_NEW_CONSOLE)
 163     {
 164         /* We'll get the real one soon */
 165         DPRINT("Creating new console\n");
 166         Parameters->ConsoleHandle = NULL;
 167     }
 168     else if (Parameters->ConsoleHandle == HANDLE_CREATE_NO_WINDOW)
 169     {
 170         /* We'll get the real one soon */
 171         DPRINT1("NOT SUPPORTED: HANDLE_CREATE_NO_WINDOW\n");
 172         Parameters->ConsoleHandle = NULL;
 173     }
 174     else
 175     {
 176         if (Parameters->ConsoleHandle == INVALID_HANDLE_VALUE)
 177         {
 178             Parameters->ConsoleHandle = 0;
 179         }
 180         DPRINT("Using existing console: %x\n", Parameters->ConsoleHandle);
 181     }
 182
 183     /* Initialize Console Ctrl Handler */
 184     ConsoleInitialized = TRUE;
 185     RtlInitializeCriticalSection(&ConsoleLock);
 186     SetConsoleCtrlHandler(DefaultConsoleCtrlHandler, TRUE);
 187
 188     /* Now use the proper console handle */
 189     Request.Data.AllocConsoleRequest.Console = Parameters->ConsoleHandle;
 190
 191     /*
 192      * Normally, we should be connecting to the Console CSR Server...
 193      * but we don't have one yet, so we will instead simply send a create
 194      * console message to the Base Server. When we finally have a Console
 195      * Server, this code should be changed to send connection data instead.
 196      *
 197      * Also note that this connection should be made for any console app, even
 198      * in the case above where -we- return.
 199      */
 200     CsrRequest = MAKE_CSR_API(ALLOC_CONSOLE, CSR_CONSOLE);
 201     Request.Data.AllocConsoleRequest.CtrlDispatcher = ConsoleControlDispatcher;
 202     Status = CsrClientCallServer(&Request,
 203                                  NULL,
 204                                  CsrRequest,
 205                                  sizeof(CSR_API_MESSAGE));
 206     if(!NT_SUCCESS(Status) || !NT_SUCCESS(Status = Request.Status))
 207     {
 208         DPRINT1("CSR Failed to give us a console\n");
 209         /* We're lying here, so at least the process can load... */
 210         return TRUE;
 211     }
 212
 213     /* We got the handles, let's set them */
 214     if ((Parameters->ConsoleHandle = Request.Data.AllocConsoleRequest.Console))
 215     {
 216         /* If we already had some, don't use the new ones */
 217         if (!Parameters->StandardInput)
 218         {
 219             Parameters->StandardInput = Request.Data.AllocConsoleRequest.InputHandle;
 220         }
 221         if (!Parameters->StandardOutput)
 222         {
 223             Parameters->StandardOutput = Request.Data.AllocConsoleRequest.OutputHandle;
 224         }
 225         if (!Parameters->StandardError)
 226         {
 227             Parameters->StandardError = Request.Data.AllocConsoleRequest.OutputHandle;
 228         }
 229     }
 230
 231     DPRINT("Console setup: %lx, %lx, %lx, %lx\n",
 232             Parameters->ConsoleHandle,
 233             Parameters->StandardInput,
 234             Parameters->StandardOutput,
 235             Parameters->StandardError);
 236     return TRUE;
 237 }
 238
 239
 240 BOOL
 241 STDCALL
 242 DllMain(HANDLE hDll,
 243         DWORD dwReason,
 244         LPVOID lpReserved)
 245 {
 246     NTSTATUS Status;
 247     BOOLEAN IsServer;
 248     ULONG Dummy;
 249     ULONG DummySize = sizeof(Dummy);
 250     WCHAR SessionDir[256];
 251
 252     DPRINT("DllMain(hInst %lx, dwReason %lu)\n",
 253            hDll, dwReason);
 254
 255     /* Cache the PEB and Session ID */
 256     Peb = NtCurrentPeb();
 257     SessionId = Peb->SessionId;
 258
 259     switch (dwReason)
 260     {
 261         case DLL_PROCESS_ATTACH:
 262
 263         /* OK, yes, this is really retarded but it works for now */
 264         InWindows = NtCurrentPeb()->BeingDebugged;
 265
 266         /*
 267          * CreateProcess will run in the real kernel32 and it will write
 268          * its own BaseProcessStartThunk EIP in the CONTEXT that ZwContinue
 269          * will get. We'll be first called by Ldr while initializing, and we'll
 270          * be wrapped in 3 layers of SEH, followed by two frames, finally
 271          * followed by our CONTEXT on the stack. We'll modify the EIP in it
 272          * to match the correct one (our own) and then everything works.
 273          * Tested on XP and 2K3, probably doesn't work in 2K.
 274          */
 275         if (InWindows)
 276         {
 277             /*
 278              * Due to yet another bug in how Windows handles .local, LDR will
 279              * actually end up loading us twice. The second time will be the
 280              * "official" load, at a totally different address. It will be,
 281              * it will be at -that- address that all the APIs will be called.
 282              * However, that address is dynamic while this one will be static,
 283              * so we'll do initilization with this one. Plus, at this one,
 284              * we know exactly that we're within 3 SEH layers.
 285              */
 286             if (hDll == (HANDLE)0x7c800000)
 287             {
 288                 PULONG Eip;
 289                 Eip = (PULONG)*(PULONG)*(PULONG)NtCurrentTeb()->Tib.ExceptionList +
 290                        0x9 +
 291                        FIELD_OFFSET(CONTEXT, Eip) / sizeof(ULONG);
 292                 *Eip = (ULONG)BaseProcessStartThunk;
 293             }
 294         }
 295
 296         /* Don't bother us for each thread */
 297         LdrDisableThreadCalloutsForDll((PVOID)hDll);
 298
 299         /* Setup the right Object Directory path */
 300         if (!SessionId)
 301         {
 302             /* Use the raw path */
 303             wcscpy(SessionDir, WIN_OBJ_DIR);
 304         }
 305         else
 306         {
 307             /* Use the session path */
 308             swprintf(SessionDir,
 309                      L"%ws\\%ld%ws",
 310                      SESSION_DIR,
 311                      SessionId,
 312                      WIN_OBJ_DIR);
 313         }
 314
 315         /* Connect to the base server */
 316         DPRINT("Connecting to CSR...\n");
 317         Status = CsrClientConnectToServer(SessionDir,
 318                                           InWindows ? 1 : 0,
 319                                           &Dummy,
 320                                           &DummySize,
 321                                           &IsServer);
 322         if (!NT_SUCCESS(Status))
 323         {
 324             DPRINT1("Failed to connect to CSR (Status %lx)\n", Status);
 325             ZwTerminateProcess(NtCurrentProcess(), Status);
 326             return FALSE;
 327         }
 328
 329         /* Check if we are running a CSR Server */
 330         if (!IsServer)
 331         {
 332             /* Set the termination port for the thread */
 333             DPRINT("Creating new thread for CSR\n");
 334             CsrNewThread();
 335         }
 336
 337         hProcessHeap = RtlGetProcessHeap();
 338         hCurrentModule = hDll;
 339         DPRINT("Heap: %p\n", hProcessHeap);
 340
 341         /*
 342          * Initialize WindowsDirectory and SystemDirectory
 343          */
 344         DPRINT("NtSystemRoot: %S\n", SharedUserData->NtSystemRoot);
 345         RtlCreateUnicodeString (&WindowsDirectory, SharedUserData->NtSystemRoot);
 346         SystemDirectory.MaximumLength = WindowsDirectory.MaximumLength + 18;
 347         SystemDirectory.Length = WindowsDirectory.Length + 18;
 348         SystemDirectory.Buffer = RtlAllocateHeap(hProcessHeap,
 349                                                  0,
 350                                                  SystemDirectory.MaximumLength);
 351         if(SystemDirectory.Buffer == NULL)
 352         {
 353            return FALSE;
 354         }
 355         wcscpy(SystemDirectory.Buffer, WindowsDirectory.Buffer);
 356         wcscat(SystemDirectory.Buffer, L"\\System32");
 357
 358         /* Open object base directory */
 359         Status = OpenBaseDirectory(&hBaseDir);
 360         if (!NT_SUCCESS(Status))
 361         {
 362             DPRINT1("Failed to open object base directory (Status %lx)\n", Status);
 363             return FALSE;
 364         }
 365
 366         /* Initialize the DLL critical section */
 367         RtlInitializeCriticalSection(&DllLock);
 368
 369         /* Initialize the National Language Support routines */
 370         if (!NlsInit())
 371         {
 372             DPRINT1("NLS Init failed\n");
 373             return FALSE;
 374         }
 375
 376         /* Initialize Console Support */
 377         if (!BasepInitConsole())
 378         {
 379             DPRINT1("Failure to set up console\n");
 380             return FALSE;
 381         }
 382
 383         /* Insert more dll attach stuff here! */
 384         DllInitialized = TRUE;
 385         DPRINT("Initialization complete\n");
 386         break;
 387
 388         case DLL_PROCESS_DETACH:
 389
 390             DPRINT("DLL_PROCESS_DETACH\n");
 391             if (DllInitialized == TRUE)
 392             {
 393                 /* Insert more dll detach stuff here! */
 394                 NlsUninit();
 395
 396                 /* Delete DLL critical section */
 397                 if (ConsoleInitialized == TRUE)
 398                 {
 399                     RtlDeleteCriticalSection (&ConsoleLock);
 400                 }
 401                 RtlDeleteCriticalSection (&DllLock);
 402
 403                 /* Close object base directory */
 404                 NtClose(hBaseDir);
 405
 406                 RtlFreeUnicodeString (&SystemDirectory);
 407                 RtlFreeUnicodeString (&WindowsDirectory);
 408             }
 409             break;
 410
 411         default:
 412             break;
 413     }
 414
 415     return TRUE;
 416 }
 417
 418 /* EOF */