dlls/win32u/syscall.c

   1 /*
   2  * Unix interface for Win32 syscalls
   3  *
   4  * Copyright (C) 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 #if 0
  22 #pragma makedep unix
  23 #endif
  24
  25 #include <stdarg.h>
  26
  27 #include "ntstatus.h"
  28 #define WIN32_NO_STATUS
  29 #include "windef.h"
  30 #include "winnt.h"
  31 #include "ntgdi_private.h"
  32 #include "ntuser_private.h"
  33 #include "ntuser.h"
  34 #include "wine/unixlib.h"
  35 #include "win32syscalls.h"
  36
  37 ULONG_PTR zero_bits = 0;
  38
  39 static void * const syscalls[] =
  40 {
  41 #define SYSCALL_ENTRY(id,name,args) name,
  42 #ifdef _WIN64
  43     ALL_SYSCALLS64
  44 #else
  45     ALL_SYSCALLS32
  46 #endif
  47 #undef SYSCALL_ENTRY
  48 };
  49
  50 static BYTE arguments[ARRAY_SIZE(syscalls)] =
  51 {
  52 #define SYSCALL_ENTRY(id,name,args) args,
  53 #ifdef _WIN64
  54     ALL_SYSCALLS64
  55 #else
  56     ALL_SYSCALLS32
  57 #endif
  58 #undef SYSCALL_ENTRY
  59 };
  60
  61 static SYSTEM_SERVICE_TABLE syscall_table =
  62 {
  63     (ULONG_PTR *)syscalls,
  64     0,
  65     ARRAY_SIZE(syscalls),
  66     arguments
  67 };
  68
  69 static NTSTATUS init( void *dispatcher )
  70 {
  71 #ifdef _WIN64
  72     if (NtCurrentTeb()->WowTebOffset)
  73     {
  74         SYSTEM_BASIC_INFORMATION info;
  75
  76         NtQuerySystemInformation(SystemEmulationBasicInformation, &info, sizeof(info), NULL);
  77         zero_bits = (ULONG_PTR)info.HighestUserAddress | 0x7fffffff;
  78     }
  79 #endif
  80
  81     return ntdll_init_syscalls( &syscall_table, dispatcher );
  82 }
  83
  84 const unixlib_entry_t __wine_unix_call_funcs[] =
  85 {
  86     init,
  87 };