dlls/kernel/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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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 #ifdef HAVE_SYS_STAT_H
  29 # include <sys/stat.h>
  30 #endif
  31 #include <time.h>
  32 #ifdef HAVE_SYS_TIME_H
  33 # include <sys/time.h>
  34 #endif
  35 #include <signal.h>
  36
  37 #include "windef.h"
  38 #include "winbase.h"
  39 #include "wincon.h"
  40 #include "winternl.h"
  41 #include "wownt32.h"
  42
  43 #include "wine/winbase16.h"
  44 #include "wine/library.h"
  45 #include "wincon.h"
  46 #include "toolhelp.h"
  47 #include "kernel_private.h"
  48 #include "kernel16_private.h"
  49 #include "console_private.h"
  50
  51 extern  int __wine_set_signal_handler(unsigned, int (*)(unsigned));
  52
  53 extern int main_create_flags;
  54
  55 static CRITICAL_SECTION ldt_section;
  56 static CRITICAL_SECTION_DEBUG critsect_debug =
  57 {
  58     0, 0, &ldt_section,
  59     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  60       0, 0, { (DWORD_PTR)(__FILE__ ": ldt_section") }
  61 };
  62 static CRITICAL_SECTION ldt_section = { &critsect_debug, -1, 0, 0, 0, 0 };
  63
  64 static DWORD server_start_time;
  65
  66 /***********************************************************************
  67  *           locking for LDT routines
  68  */
  69 static void ldt_lock(void)
  70 {
  71     RtlEnterCriticalSection( &ldt_section );
  72 }
  73
  74 static void ldt_unlock(void)
  75 {
  76     RtlLeaveCriticalSection( &ldt_section );
  77 }
  78
  79
  80 /***********************************************************************
  81  *           KERNEL thread initialisation routine
  82  */
  83 static void thread_attach(void)
  84 {
  85     /* allocate the 16-bit stack (FIXME: should be done lazily) */
  86     HGLOBAL16 hstack = WOWGlobalAlloc16( GMEM_FIXED, 0x10000 );
  87     kernel_get_thread_data()->stack_sel = GlobalHandleToSel16( hstack );
  88     NtCurrentTeb()->WOW32Reserved = (void *)MAKESEGPTR( kernel_get_thread_data()->stack_sel,
  89                                                         0x10000 - sizeof(STACK16FRAME) );
  90 }
  91
  92
  93 /***********************************************************************
  94  *           KERNEL thread finalisation routine
  95  */
  96 static void thread_detach(void)
  97 {
  98     /* free the 16-bit stack */
  99     WOWGlobalFree16( kernel_get_thread_data()->stack_sel );
 100     NtCurrentTeb()->WOW32Reserved = 0;
 101     if (NtCurrentTeb()->Tib.SubSystemTib) TASK_ExitTask();
 102 }
 103
 104
 105 /***********************************************************************
 106  *           KERNEL process initialisation routine
 107  */
 108 static BOOL process_attach(void)
 109 {
 110     SYSTEM_INFO si;
 111     SYSTEM_TIMEOFDAY_INFORMATION sti;
 112
 113     NtQuerySystemInformation( SystemTimeOfDayInformation, &sti, sizeof(sti), NULL );
 114     RtlTimeToSecondsSince1970( &sti.liKeBootTime, &server_start_time );
 115
 116     /* FIXME: should probably be done in ntdll */
 117     GetSystemInfo( &si );
 118     NtCurrentTeb()->Peb->NumberOfProcessors = si.dwNumberOfProcessors;
 119
 120     /* Setup registry locale information */
 121     LOCALE_InitRegistry();
 122
 123     /* Setup computer name */
 124     COMPUTERNAME_Init();
 125
 126     /* copy process information from ntdll */
 127     ENV_CopyStartupInformation();
 128
 129 #ifdef __i386__
 130     if (GetVersion() & 0x80000000)
 131     {
 132         /* create the shared heap for broken win95 native dlls */
 133         HeapCreate( HEAP_SHARED, 0, 0 );
 134         /* setup emulation of protected instructions from 32-bit code */
 135         RtlAddVectoredExceptionHandler( TRUE, INSTR_vectored_handler );
 136     }
 137 #endif
 138
 139     /* initialize LDT locking */
 140     wine_ldt_init_locking( ldt_lock, ldt_unlock );
 141
 142     /* finish the process initialisation for console bits, if needed */
 143     __wine_set_signal_handler(SIGINT, CONSOLE_HandleCtrlC);
 144
 145     if (main_create_flags & CREATE_NEW_CONSOLE)
 146     {
 147         HMODULE mod = GetModuleHandleA(0);
 148         if (RtlImageNtHeader(mod)->OptionalHeader.Subsystem == IMAGE_SUBSYSTEM_WINDOWS_CUI)
 149             AllocConsole();
 150     }
 151     else if (!(main_create_flags & DETACHED_PROCESS))
 152     {
 153         /* 1/ shall inherit console + handles
 154          * 2/ shall create std handles, if handles are not inherited
 155          * TBD when not using wineserver handles for console handles
 156          */
 157     }
 158
 159     if (main_create_flags & CREATE_NEW_PROCESS_GROUP)
 160         SetConsoleCtrlHandler(NULL, TRUE);
 161
 162     /* Create 16-bit task */
 163     LoadLibrary16( "krnl386.exe" );
 164     thread_attach();
 165     TASK_CreateMainTask();
 166     return TRUE;
 167 }
 168
 169 /***********************************************************************
 170  *           KERNEL initialisation routine
 171  */
 172 BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
 173 {
 174     switch(reason)
 175     {
 176     case DLL_PROCESS_ATTACH:
 177         return process_attach();
 178     case DLL_THREAD_ATTACH:
 179         thread_attach();
 180         break;
 181     case DLL_THREAD_DETACH:
 182         thread_detach();
 183         break;
 184     case DLL_PROCESS_DETACH:
 185         WriteOutProfiles16();
 186         break;
 187     }
 188     return TRUE;
 189 }
 190
 191 /***********************************************************************
 192  *           MulDiv   (KERNEL32.@)
 193  * RETURNS
 194  *      Result of multiplication and division
 195  *      -1: Overflow occurred or Divisor was 0
 196  */
 197 INT WINAPI MulDiv( INT nMultiplicand, INT nMultiplier, INT nDivisor)
 198 {
 199     LONGLONG ret;
 200
 201     if (!nDivisor) return -1;
 202
 203     /* We want to deal with a positive divisor to simplify the logic. */
 204     if (nDivisor < 0)
 205     {
 206       nMultiplicand = - nMultiplicand;
 207       nDivisor = -nDivisor;
 208     }
 209
 210     /* If the result is positive, we "add" to round. else, we subtract to round. */
 211     if ( ( (nMultiplicand <  0) && (nMultiplier <  0) ) ||
 212          ( (nMultiplicand >= 0) && (nMultiplier >= 0) ) )
 213       ret = (((LONGLONG)nMultiplicand * nMultiplier) + (nDivisor/2)) / nDivisor;
 214     else
 215       ret = (((LONGLONG)nMultiplicand * nMultiplier) - (nDivisor/2)) / nDivisor;
 216
 217     if ((ret > 2147483647) || (ret < -2147483647)) return -1;
 218     return ret;
 219 }
 220
 221
 222 /***********************************************************************
 223  *           GetTickCount       (KERNEL32.@)
 224  *
 225  * Get the number of milliseconds the system has been running.
 226  *
 227  * PARAMS
 228  *  None.
 229  *
 230  * RETURNS
 231  *  The current tick count.
 232  *
 233  * NOTES
 234  *  -The value returned will wrap arounf every 2^32 milliseconds.
 235  *  -Under Windows, tick 0 is the moment at which the system is rebooted.
 236  *  Under Wine, tick 0 begins at the moment the wineserver process is started,
 237  */
 238 DWORD WINAPI GetTickCount(void)
 239 {
 240     struct timeval t;
 241     gettimeofday( &t, NULL );
 242     return ((t.tv_sec - server_start_time) * 1000) + (t.tv_usec / 1000);
 243 }