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 #include <sys/stat.h>
  29 #include <signal.h>
  30
  31 #include "windef.h"
  32 #include "winbase.h"
  33 #include "wincon.h"
  34 #include "winreg.h"
  35 #include "winternl.h"
  36
  37 #include "wine/winbase16.h"
  38 #include "wine/library.h"
  39 #include "miscemu.h"
  40 #include "module.h"
  41 #include "thread.h"
  42 #include "stackframe.h"
  43 #include "wincon.h"
  44 #include "toolhelp.h"
  45 #include "kernel_private.h"
  46 #include "console_private.h"
  47
  48 extern void LOCALE_InitRegistry(void);
  49 extern void COMPUTERNAME_Init(void);
  50
  51 extern  int __wine_set_signal_handler(unsigned, int (*)(unsigned));
  52 /* memory/environ.c */
  53 extern void ENV_CopyStartupInformation(void);
  54
  55 extern int main_create_flags;
  56
  57 static CRITICAL_SECTION ldt_section;
  58 static CRITICAL_SECTION_DEBUG critsect_debug =
  59 {
  60     0, 0, &ldt_section,
  61     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  62       0, 0, { 0, (DWORD)(__FILE__ ": ldt_section") }
  63 };
  64 static CRITICAL_SECTION ldt_section = { &critsect_debug, -1, 0, 0, 0, 0 };
  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 = K32WOWGlobalAlloc16( GMEM_FIXED, 0x10000 );
  87     NtCurrentTeb()->stack_sel = GlobalHandleToSel16( hstack );
  88     NtCurrentTeb()->cur_stack = MAKESEGPTR( NtCurrentTeb()->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     K32WOWGlobalFree16( NtCurrentTeb()->stack_sel );
 100     NtCurrentTeb()->cur_stack = 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     HMODULE16 hModule;
 111
 112     /* Setup registry locale information */
 113     LOCALE_InitRegistry();
 114
 115     /* Initialize 16-bit thunking entry points */
 116     if (!WOWTHUNK_Init()) return FALSE;
 117
 118     /* Initialize DOS memory */
 119     if (!DOSMEM_Init(0)) return FALSE;
 120
 121     /* Setup computer name */
 122     COMPUTERNAME_Init();
 123
 124     /* copy process information from ntdll */
 125     ENV_CopyStartupInformation();
 126
 127     if ((hModule = LoadLibrary16( "krnl386.exe" )) >= 32)
 128     {
 129         /* Initialize special KERNEL entry points */
 130
 131         /* Initialize KERNEL.178 (__WINFLAGS) with the correct flags value */
 132         NE_SetEntryPoint( hModule, 178, GetWinFlags16() );
 133
 134         /* Initialize KERNEL.454/455 (__FLATCS/__FLATDS) */
 135         NE_SetEntryPoint( hModule, 454, wine_get_cs() );
 136         NE_SetEntryPoint( hModule, 455, wine_get_ds() );
 137
 138         /* Initialize KERNEL.THHOOK */
 139         TASK_InstallTHHook(MapSL((SEGPTR)GetProcAddress16( hModule, (LPCSTR)332 )));
 140
 141         /* Initialize the real-mode selector entry points */
 142 #define SET_ENTRY_POINT( num, addr ) \
 143     NE_SetEntryPoint( hModule, (num), GLOBAL_CreateBlock( GMEM_FIXED, \
 144                       DOSMEM_MapDosToLinear(addr), 0x10000, hModule, \
 145                       WINE_LDT_FLAGS_DATA ))
 146
 147         SET_ENTRY_POINT( 174, 0xa0000 );  /* KERNEL.174: __A000H */
 148         SET_ENTRY_POINT( 181, 0xb0000 );  /* KERNEL.181: __B000H */
 149         SET_ENTRY_POINT( 182, 0xb8000 );  /* KERNEL.182: __B800H */
 150         SET_ENTRY_POINT( 195, 0xc0000 );  /* KERNEL.195: __C000H */
 151         SET_ENTRY_POINT( 179, 0xd0000 );  /* KERNEL.179: __D000H */
 152         SET_ENTRY_POINT( 190, 0xe0000 );  /* KERNEL.190: __E000H */
 153         NE_SetEntryPoint( hModule, 183, DOSMEM_0000H );       /* KERNEL.183: __0000H */
 154         NE_SetEntryPoint( hModule, 173, DOSMEM_BiosSysSeg );  /* KERNEL.173: __ROMBIOS */
 155         NE_SetEntryPoint( hModule, 193, DOSMEM_BiosDataSeg ); /* KERNEL.193: __0040H */
 156         NE_SetEntryPoint( hModule, 194, DOSMEM_BiosSysSeg );  /* KERNEL.194: __F000H */
 157 #undef SET_ENTRY_POINT
 158
 159         /* Force loading of some dlls */
 160         LoadLibrary16( "system.drv" );
 161     }
 162
 163     /* Create the shared heap for broken win95 native dlls */
 164     HeapCreate( HEAP_SHARED, 0, 0 );
 165
 166     /* initialize LDT locking */
 167     wine_ldt_init_locking( ldt_lock, ldt_unlock );
 168
 169     /* finish the process initialisation for console bits, if needed */
 170     __wine_set_signal_handler(SIGINT, CONSOLE_HandleCtrlC);
 171
 172     if (main_create_flags & CREATE_NEW_CONSOLE)
 173     {
 174         HMODULE mod = GetModuleHandleA(0);
 175         if (RtlImageNtHeader(mod)->OptionalHeader.Subsystem == IMAGE_SUBSYSTEM_WINDOWS_CUI)
 176             AllocConsole();
 177     }
 178     else if (!(main_create_flags & DETACHED_PROCESS))
 179     {
 180         /* 1/ shall inherit console + handles
 181          * 2/ shall create std handles, if handles are not inherited
 182          * TBD when not using wineserver handles for console handles
 183          */
 184     }
 185
 186     if (main_create_flags & CREATE_NEW_PROCESS_GROUP)
 187         SetConsoleCtrlHandler(NULL, TRUE);
 188
 189     /* Create 16-bit task */
 190     thread_attach();
 191     TASK_CreateMainTask();
 192     return TRUE;
 193 }
 194
 195 /***********************************************************************
 196  *           KERNEL initialisation routine
 197  */
 198 BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
 199 {
 200     switch(reason)
 201     {
 202     case DLL_PROCESS_ATTACH:
 203         return process_attach();
 204     case DLL_THREAD_ATTACH:
 205         thread_attach();
 206         break;
 207     case DLL_THREAD_DETACH:
 208         thread_detach();
 209         break;
 210     case DLL_PROCESS_DETACH:
 211         WriteOutProfiles16();
 212         break;
 213     }
 214     return TRUE;
 215 }
 216
 217 /***********************************************************************
 218  *              EnableDos (KERNEL.41)
 219  *              DisableDos (KERNEL.42)
 220  *              GetLastDiskChange (KERNEL.98)
 221  *              ValidateCodeSegments (KERNEL.100)
 222  *              KbdRst (KERNEL.123)
 223  *              EnableKernel (KERNEL.124)
 224  *              DisableKernel (KERNEL.125)
 225  *              ValidateFreeSpaces (KERNEL.200)
 226  *              K237 (KERNEL.237)
 227  *              BUNNY_351 (KERNEL.351)
 228  *              PIGLET_361 (KERNEL.361)
 229  *
 230  * Entry point for kernel functions that do nothing.
 231  */
 232 LONG WINAPI KERNEL_nop(void)
 233 {
 234     return 0;
 235 }
 236
 237 /***********************************************************************
 238  *              SwitchToThread (KERNEL32.@)
 239  */
 240
 241 BOOL WINAPI SwitchToThread(void)
 242 {
 243     Sleep(0);
 244     return 1;
 245 }
 246
 247
 248 /***********************************************************************
 249  *           MulDiv   (KERNEL32.@)
 250  * RETURNS
 251  *      Result of multiplication and division
 252  *      -1: Overflow occurred or Divisor was 0
 253  */
 254 INT WINAPI MulDiv( INT nMultiplicand, INT nMultiplier, INT nDivisor)
 255 {
 256     LONGLONG ret;
 257
 258     if (!nDivisor) return -1;
 259
 260     /* We want to deal with a positive divisor to simplify the logic. */
 261     if (nDivisor < 0)
 262     {
 263       nMultiplicand = - nMultiplicand;
 264       nDivisor = -nDivisor;
 265     }
 266
 267     /* If the result is positive, we "add" to round. else, we subtract to round. */
 268     if ( ( (nMultiplicand <  0) && (nMultiplier <  0) ) ||
 269          ( (nMultiplicand >= 0) && (nMultiplier >= 0) ) )
 270       ret = (((LONGLONG)nMultiplicand * nMultiplier) + (nDivisor/2)) / nDivisor;
 271     else
 272       ret = (((LONGLONG)nMultiplicand * nMultiplier) - (nDivisor/2)) / nDivisor;
 273
 274     if ((ret > 2147483647) || (ret < -2147483647)) return -1;
 275     return ret;
 276 }