dlls/kernel32/kernel_main.c

   1 /*
   2  * Kernel initialization code
   3  *
   4  * Copyright 2000 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 "config.h"
  22 #include "wine/port.h"
  23
  24 #include <assert.h>
  25 #include <ctype.h>
  26 #include <stdarg.h>
  27 #include <string.h>
  28 #include <signal.h>
  29
  30 #include "windef.h"
  31 #include "winbase.h"
  32 #include "wincon.h"
  33 #include "winternl.h"
  34 #include "wownt32.h"
  35
  36 #include "wine/library.h"
  37 #include "kernel_private.h"
  38 #include "console_private.h"
  39 #include "wine/debug.h"
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(process);
  42
  43 extern int CDECL __wine_set_signal_handler(unsigned, int (*)(unsigned));
  44
  45 static ULONGLONG server_start_time;
  46
  47 /***********************************************************************
  48  *           set_entry_point
  49  */
  50 static void set_entry_point( HMODULE module, const char *name, DWORD rva )
  51 {
  52     IMAGE_EXPORT_DIRECTORY *exports;
  53     DWORD exp_size;
  54
  55     if ((exports = RtlImageDirectoryEntryToData( module, TRUE,
  56                                                   IMAGE_DIRECTORY_ENTRY_EXPORT, &exp_size )))
  57     {
  58         DWORD *functions = (DWORD *)((char *)module + exports->AddressOfFunctions);
  59         const WORD *ordinals = (const WORD *)((const char *)module + exports->AddressOfNameOrdinals);
  60         const DWORD *names = (const DWORD *)((const char *)module +  exports->AddressOfNames);
  61         int min = 0, max = exports->NumberOfNames - 1;
  62
  63         while (min <= max)
  64         {
  65             int res, pos = (min + max) / 2;
  66             const char *ename = (const char *)module + names[pos];
  67             if (!(res = strcmp( ename, name )))
  68             {
  69                 WORD ordinal = ordinals[pos];
  70                 assert( ordinal < exports->NumberOfFunctions );
  71                 TRACE( "setting %s at %p to %08x\n", name, &functions[ordinal], rva );
  72                 functions[ordinal] = rva;
  73                 return;
  74             }
  75             if (res > 0) max = pos - 1;
  76             else min = pos + 1;
  77         }
  78     }
  79 }
  80
  81
  82 /***********************************************************************
  83  *           KERNEL process initialisation routine
  84  */
  85 static BOOL process_attach( HMODULE module )
  86 {
  87     SYSTEM_TIMEOFDAY_INFORMATION ti;
  88     RTL_USER_PROCESS_PARAMETERS *params = NtCurrentTeb()->Peb->ProcessParameters;
  89
  90     NtQuerySystemInformation( SystemTimeOfDayInformation, &ti, sizeof(ti), NULL );
  91     server_start_time = ti.liKeBootTime.QuadPart;
  92
  93     /* Setup registry locale information */
  94     LOCALE_InitRegistry();
  95
  96     /* Setup computer name */
  97     COMPUTERNAME_Init();
  98
  99     CONSOLE_Init(params);
 100
 101     /* copy process information from ntdll */
 102     ENV_CopyStartupInformation();
 103
 104     if (!(GetVersion() & 0x80000000))
 105     {
 106         /* Securom checks for this one when version is NT */
 107         set_entry_point( module, "FT_Thunk", 0 );
 108     }
 109     else LoadLibraryA( "krnl386.exe16" );
 110
 111     /* finish the process initialisation for console bits, if needed */
 112     __wine_set_signal_handler(SIGINT, CONSOLE_HandleCtrlC);
 113
 114     if (params->ConsoleHandle == KERNEL32_CONSOLE_ALLOC)
 115     {
 116         HMODULE mod = GetModuleHandleA(0);
 117         if (RtlImageNtHeader(mod)->OptionalHeader.Subsystem == IMAGE_SUBSYSTEM_WINDOWS_CUI)
 118             AllocConsole();
 119     }
 120     /* else TODO for DETACHED_PROCESS:
 121      * 1/ inherit console + handles
 122      * 2/ create std handles, if handles are not inherited
 123      * TBD when not using wineserver handles for console handles
 124      */
 125
 126     return TRUE;
 127 }
 128
 129 /***********************************************************************
 130  *           KERNEL initialisation routine
 131  */
 132 BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
 133 {
 134     switch(reason)
 135     {
 136     case DLL_PROCESS_ATTACH:
 137         DisableThreadLibraryCalls( hinst );
 138         return process_attach( hinst );
 139     case DLL_PROCESS_DETACH:
 140         WritePrivateProfileSectionW( NULL, NULL, NULL );
 141         CONSOLE_Exit();
 142         break;
 143     }
 144     return TRUE;
 145 }
 146
 147 /***********************************************************************
 148  *           MulDiv   (KERNEL32.@)
 149  * RETURNS
 150  *      Result of multiplication and division
 151  *      -1: Overflow occurred or Divisor was 0
 152  */
 153 INT WINAPI MulDiv( INT nMultiplicand, INT nMultiplier, INT nDivisor)
 154 {
 155     LONGLONG ret;
 156
 157     if (!nDivisor) return -1;
 158
 159     /* We want to deal with a positive divisor to simplify the logic. */
 160     if (nDivisor < 0)
 161     {
 162       nMultiplicand = - nMultiplicand;
 163       nDivisor = -nDivisor;
 164     }
 165
 166     /* If the result is positive, we "add" to round. else, we subtract to round. */
 167     if ( ( (nMultiplicand <  0) && (nMultiplier <  0) ) ||
 168          ( (nMultiplicand >= 0) && (nMultiplier >= 0) ) )
 169       ret = (((LONGLONG)nMultiplicand * nMultiplier) + (nDivisor/2)) / nDivisor;
 170     else
 171       ret = (((LONGLONG)nMultiplicand * nMultiplier) - (nDivisor/2)) / nDivisor;
 172
 173     if ((ret > 2147483647) || (ret < -2147483647)) return -1;
 174     return ret;
 175 }
 176
 177
 178 /******************************************************************************
 179  *           GetTickCount64       (KERNEL32.@)
 180  */
 181 ULONGLONG WINAPI GetTickCount64(void)
 182 {
 183     LARGE_INTEGER now;
 184
 185     NtQuerySystemTime( &now );
 186     return (now.QuadPart - server_start_time) / 10000;
 187 }
 188
 189
 190 /***********************************************************************
 191  *           GetTickCount       (KERNEL32.@)
 192  *
 193  * Get the number of milliseconds the system has been running.
 194  *
 195  * PARAMS
 196  *  None.
 197  *
 198  * RETURNS
 199  *  The current tick count.
 200  *
 201  * NOTES
 202  *  The value returned will wrap around every 2^32 milliseconds.
 203  *  Under Windows, tick 0 is the moment at which the system is rebooted.
 204  *  Under Wine, tick 0 begins at the moment the wineserver process is started.
 205  */
 206 DWORD WINAPI GetTickCount(void)
 207 {
 208     return GetTickCount64();
 209 }