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/winbase16.h"
  37 #include "wine/library.h"
  38 #include "wincon.h"
  39 #include "toolhelp.h"
  40 #include "kernel_private.h"
  41 #include "kernel16_private.h"
  42 #include "console_private.h"
  43
  44 extern  int __wine_set_signal_handler(unsigned, int (*)(unsigned));
  45
  46 static CRITICAL_SECTION ldt_section;
  47 static CRITICAL_SECTION_DEBUG critsect_debug =
  48 {
  49     0, 0, &ldt_section,
  50     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  51       0, 0, { (DWORD_PTR)(__FILE__ ": ldt_section") }
  52 };
  53 static CRITICAL_SECTION ldt_section = { &critsect_debug, -1, 0, 0, 0, 0 };
  54
  55 /***********************************************************************
  56  *           locking for LDT routines
  57  */
  58 static void ldt_lock(void)
  59 {
  60     RtlEnterCriticalSection( &ldt_section );
  61 }
  62
  63 static void ldt_unlock(void)
  64 {
  65     RtlLeaveCriticalSection( &ldt_section );
  66 }
  67
  68
  69 /***********************************************************************
  70  *           KERNEL thread initialisation routine
  71  */
  72 static void thread_attach(void)
  73 {
  74     /* allocate the 16-bit stack (FIXME: should be done lazily) */
  75     HGLOBAL16 hstack = WOWGlobalAlloc16( GMEM_FIXED, 0x10000 );
  76     kernel_get_thread_data()->stack_sel = GlobalHandleToSel16( hstack );
  77     NtCurrentTeb()->WOW32Reserved = (void *)MAKESEGPTR( kernel_get_thread_data()->stack_sel,
  78                                                         0x10000 - sizeof(STACK16FRAME) );
  79 }
  80
  81
  82 /***********************************************************************
  83  *           KERNEL thread finalisation routine
  84  */
  85 static void thread_detach(void)
  86 {
  87     /* free the 16-bit stack */
  88     WOWGlobalFree16( kernel_get_thread_data()->stack_sel );
  89     NtCurrentTeb()->WOW32Reserved = 0;
  90     if (NtCurrentTeb()->Tib.SubSystemTib) TASK_ExitTask();
  91 }
  92
  93
  94 /***********************************************************************
  95  *           KERNEL process initialisation routine
  96  */
  97 static BOOL process_attach(void)
  98 {
  99     SYSTEM_INFO si;
 100     RTL_USER_PROCESS_PARAMETERS *params = NtCurrentTeb()->Peb->ProcessParameters;
 101
 102     /* FIXME: should probably be done in ntdll */
 103     GetSystemInfo( &si );
 104     NtCurrentTeb()->Peb->NumberOfProcessors = si.dwNumberOfProcessors;
 105
 106     /* Setup registry locale information */
 107     LOCALE_InitRegistry();
 108
 109     /* Setup computer name */
 110     COMPUTERNAME_Init();
 111
 112     /* convert value from server:
 113      * + 0 => INVALID_HANDLE_VALUE
 114      * + console handle needs to be mapped
 115      */
 116     if (!params->hStdInput)
 117         params->hStdInput = INVALID_HANDLE_VALUE;
 118     else if (VerifyConsoleIoHandle(console_handle_map(params->hStdInput)))
 119         params->hStdInput = console_handle_map(params->hStdInput);
 120
 121     if (!params->hStdOutput)
 122         params->hStdOutput = INVALID_HANDLE_VALUE;
 123     else if (VerifyConsoleIoHandle(console_handle_map(params->hStdOutput)))
 124         params->hStdOutput = console_handle_map(params->hStdOutput);
 125
 126     if (!params->hStdError)
 127         params->hStdError = INVALID_HANDLE_VALUE;
 128     else if (VerifyConsoleIoHandle(console_handle_map(params->hStdError)))
 129         params->hStdError = console_handle_map(params->hStdError);
 130
 131     /* copy process information from ntdll */
 132     ENV_CopyStartupInformation();
 133
 134 #ifdef __i386__
 135     if (GetVersion() & 0x80000000)
 136     {
 137         /* create the shared heap for broken win95 native dlls */
 138         HeapCreate( HEAP_SHARED, 0, 0 );
 139         /* setup emulation of protected instructions from 32-bit code */
 140         RtlAddVectoredExceptionHandler( TRUE, INSTR_vectored_handler );
 141     }
 142 #endif
 143
 144     /* initialize LDT locking */
 145     wine_ldt_init_locking( ldt_lock, ldt_unlock );
 146
 147     /* finish the process initialisation for console bits, if needed */
 148     __wine_set_signal_handler(SIGINT, CONSOLE_HandleCtrlC);
 149
 150     if (params->ConsoleHandle == (HANDLE)1)  /* FIXME */
 151     {
 152         HMODULE mod = GetModuleHandleA(0);
 153         if (RtlImageNtHeader(mod)->OptionalHeader.Subsystem == IMAGE_SUBSYSTEM_WINDOWS_CUI)
 154             AllocConsole();
 155     }
 156     /* else TODO for DETACHED_PROCESS:
 157      * 1/ inherit console + handles
 158      * 2/ create std handles, if handles are not inherited
 159      * TBD when not using wineserver handles for console handles
 160      */
 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     return NtGetTickCount();
 241 }