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
  35 #include "wine/library.h"
  36 #include "kernel_private.h"
  37 #include "console_private.h"
  38 #include "wine/debug.h"
  39
  40 WINE_DEFAULT_DEBUG_CHANNEL(process);
  41
  42 extern int CDECL __wine_set_signal_handler(unsigned, int (*)(unsigned));
  43
  44 static ULONGLONG server_start_time;
  45
  46 /***********************************************************************
  47  *           set_entry_point
  48  */
  49 static void set_entry_point( HMODULE module, const char *name, DWORD rva )
  50 {
  51     IMAGE_EXPORT_DIRECTORY *exports;
  52     DWORD exp_size;
  53
  54     if ((exports = RtlImageDirectoryEntryToData( module, TRUE,
  55                                                   IMAGE_DIRECTORY_ENTRY_EXPORT, &exp_size )))
  56     {
  57         DWORD *functions = (DWORD *)((char *)module + exports->AddressOfFunctions);
  58         const WORD *ordinals = (const WORD *)((const char *)module + exports->AddressOfNameOrdinals);
  59         const DWORD *names = (const DWORD *)((const char *)module +  exports->AddressOfNames);
  60         int min = 0, max = exports->NumberOfNames - 1;
  61
  62         while (min <= max)
  63         {
  64             int res, pos = (min + max) / 2;
  65             const char *ename = (const char *)module + names[pos];
  66             if (!(res = strcmp( ename, name )))
  67             {
  68                 WORD ordinal = ordinals[pos];
  69                 assert( ordinal < exports->NumberOfFunctions );
  70                 TRACE( "setting %s at %p to %08x\n", name, &functions[ordinal], rva );
  71                 functions[ordinal] = rva;
  72                 return;
  73             }
  74             if (res > 0) max = pos - 1;
  75             else min = pos + 1;
  76         }
  77     }
  78 }
  79
  80
  81 /***********************************************************************
  82  *           KERNEL process initialisation routine
  83  */
  84 static BOOL process_attach( HMODULE module )
  85 {
  86     SYSTEM_TIMEOFDAY_INFORMATION ti;
  87     RTL_USER_PROCESS_PARAMETERS *params = NtCurrentTeb()->Peb->ProcessParameters;
  88
  89     NtQuerySystemInformation( SystemTimeOfDayInformation, &ti, sizeof(ti), NULL );
  90     server_start_time = ti.liKeBootTime.QuadPart;
  91
  92     /* Setup registry locale information */
  93     LOCALE_InitRegistry();
  94
  95     /* Setup computer name */
  96     COMPUTERNAME_Init();
  97
  98     CONSOLE_Init(params);
  99
 100     /* copy process information from ntdll */
 101     ENV_CopyStartupInformation();
 102
 103     if (!(GetVersion() & 0x80000000))
 104     {
 105         /* Securom checks for this one when version is NT */
 106         set_entry_point( module, "FT_Thunk", 0 );
 107     }
 108     else LoadLibraryA( "krnl386.exe16" );
 109
 110     /* finish the process initialisation for console bits, if needed */
 111     __wine_set_signal_handler(SIGINT, CONSOLE_HandleCtrlC);
 112
 113     if (params->ConsoleHandle == KERNEL32_CONSOLE_ALLOC)
 114     {
 115         HMODULE mod = GetModuleHandleA(0);
 116         if (RtlImageNtHeader(mod)->OptionalHeader.Subsystem == IMAGE_SUBSYSTEM_WINDOWS_CUI)
 117             AllocConsole();
 118     }
 119     /* else TODO for DETACHED_PROCESS:
 120      * 1/ inherit console + handles
 121      * 2/ create std handles, if handles are not inherited
 122      * TBD when not using wineserver handles for console handles
 123      */
 124
 125     return TRUE;
 126 }
 127
 128 /***********************************************************************
 129  *           KERNEL initialisation routine
 130  */
 131 BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
 132 {
 133     switch(reason)
 134     {
 135     case DLL_PROCESS_ATTACH:
 136         DisableThreadLibraryCalls( hinst );
 137         return process_attach( hinst );
 138     case DLL_PROCESS_DETACH:
 139         WritePrivateProfileSectionW( NULL, NULL, NULL );
 140         CONSOLE_Exit();
 141         break;
 142     }
 143     return TRUE;
 144 }
 145
 146 /***********************************************************************
 147  *           MulDiv   (KERNEL32.@)
 148  * RETURNS
 149  *      Result of multiplication and division
 150  *      -1: Overflow occurred or Divisor was 0
 151  */
 152 INT WINAPI MulDiv( INT nMultiplicand, INT nMultiplier, INT nDivisor)
 153 {
 154     LONGLONG ret;
 155
 156     if (!nDivisor) return -1;
 157
 158     /* We want to deal with a positive divisor to simplify the logic. */
 159     if (nDivisor < 0)
 160     {
 161       nMultiplicand = - nMultiplicand;
 162       nDivisor = -nDivisor;
 163     }
 164
 165     /* If the result is positive, we "add" to round. else, we subtract to round. */
 166     if ( ( (nMultiplicand <  0) && (nMultiplier <  0) ) ||
 167          ( (nMultiplicand >= 0) && (nMultiplier >= 0) ) )
 168       ret = (((LONGLONG)nMultiplicand * nMultiplier) + (nDivisor/2)) / nDivisor;
 169     else
 170       ret = (((LONGLONG)nMultiplicand * nMultiplier) - (nDivisor/2)) / nDivisor;
 171
 172     if ((ret > 2147483647) || (ret < -2147483647)) return -1;
 173     return ret;
 174 }
 175
 176
 177 /******************************************************************************
 178  *           GetTickCount64       (KERNEL32.@)
 179  */
 180 ULONGLONG WINAPI GetTickCount64(void)
 181 {
 182     LARGE_INTEGER now;
 183
 184     NtQuerySystemTime( &now );
 185     return (now.QuadPart - server_start_time) / 10000;
 186 }
 187
 188
 189 /***********************************************************************
 190  *           GetTickCount       (KERNEL32.@)
 191  *
 192  * Get the number of milliseconds the system has been running.
 193  *
 194  * PARAMS
 195  *  None.
 196  *
 197  * RETURNS
 198  *  The current tick count.
 199  *
 200  * NOTES
 201  *  The value returned will wrap around every 2^32 milliseconds.
 202  *  Under Windows, tick 0 is the moment at which the system is rebooted.
 203  *  Under Wine, tick 0 begins at the moment the wineserver process is started.
 204  */
 205 DWORD WINAPI GetTickCount(void)
 206 {
 207     return GetTickCount64();
 208 }
 209
 210 /******************************************************************************
 211  *           GetSystemRegistryQuota       (KERNEL32.@)
 212  */
 213 BOOL WINAPI GetSystemRegistryQuota(PDWORD pdwQuotaAllowed, PDWORD pdwQuotaUsed)
 214 {
 215     FIXME("(%p, %p) faking reported quota values\n", pdwQuotaAllowed, pdwQuotaUsed);
 216
 217     if (pdwQuotaAllowed)
 218         *pdwQuotaAllowed = 2 * 1000 * 1000 * 1000; /* 2 GB */
 219
 220     if (pdwQuotaUsed)
 221         *pdwQuotaUsed = 100 * 1000 * 1000; /* 100 MB */
 222
 223     return TRUE;
 224 }