dlls/win32u/main.c

   1 /*
   2  * Win32u kernel interface
   3  *
   4  * Copyright 2021 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <stdarg.h>
  22
  23 #include "ntstatus.h"
  24 #define WIN32_NO_STATUS
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "ntgdi.h"
  28 #include "win32u_private.h"
  29 #include "wine/unixlib.h"
  30
  31 extern void *__wine_syscall_dispatcher DECLSPEC_HIDDEN;
  32
  33 static unixlib_handle_t win32u_handle;
  34
  35 void __cdecl __wine_spec_unimplemented_stub( const char *module, const char *function )
  36 {
  37     EXCEPTION_RECORD record;
  38
  39     record.ExceptionCode    = EXCEPTION_WINE_STUB;
  40     record.ExceptionFlags   = EH_NONCONTINUABLE;
  41     record.ExceptionRecord  = NULL;
  42     record.ExceptionAddress = __wine_spec_unimplemented_stub;
  43     record.NumberParameters = 2;
  44     record.ExceptionInformation[0] = (ULONG_PTR)module;
  45     record.ExceptionInformation[1] = (ULONG_PTR)function;
  46     for (;;) RtlRaiseException( &record );
  47 }
  48
  49 BOOL WINAPI DllMain( HINSTANCE inst, DWORD reason, void *reserved )
  50 {
  51     switch (reason)
  52     {
  53     case DLL_PROCESS_ATTACH:
  54         LdrDisableThreadCalloutsForDll( inst );
  55         if (__wine_syscall_dispatcher) break;  /* already set through Wow64Transition */
  56         if (!NtQueryVirtualMemory( GetCurrentProcess(), inst, MemoryWineUnixFuncs,
  57                                    &win32u_handle, sizeof(win32u_handle), NULL ))
  58         {
  59             __wine_unix_call( win32u_handle, 0, &__wine_syscall_dispatcher );
  60             wrappers_init( win32u_handle );
  61         }
  62         break;
  63     }
  64     return TRUE;
  65 }