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     /* convert value from server:
 100      * + 0 => INVALID_HANDLE_VALUE
 101      * + console handle needs to be mapped
 102      */
 103     if (!params->hStdInput)
 104         params->hStdInput = INVALID_HANDLE_VALUE;
 105     else if (VerifyConsoleIoHandle(console_handle_map(params->hStdInput)))
 106         params->hStdInput = console_handle_map(params->hStdInput);
 107
 108     if (!params->hStdOutput)
 109         params->hStdOutput = INVALID_HANDLE_VALUE;
 110     else if (VerifyConsoleIoHandle(console_handle_map(params->hStdOutput)))
 111         params->hStdOutput = console_handle_map(params->hStdOutput);
 112
 113     if (!params->hStdError)
 114         params->hStdError = INVALID_HANDLE_VALUE;
 115     else if (VerifyConsoleIoHandle(console_handle_map(params->hStdError)))
 116         params->hStdError = console_handle_map(params->hStdError);
 117
 118     /* copy process information from ntdll */
 119     ENV_CopyStartupInformation();
 120
 121     if (!(GetVersion() & 0x80000000))
 122     {
 123         /* Securom checks for this one when version is NT */
 124         set_entry_point( module, "FT_Thunk", 0 );
 125     }
 126 #ifdef __i386__
 127     else
 128     {
 129         /* create the shared heap for broken win95 native dlls */
 130         HeapCreate( HEAP_SHARED, 0, 0 );
 131     }
 132 #endif
 133
 134     /* finish the process initialisation for console bits, if needed */
 135     __wine_set_signal_handler(SIGINT, CONSOLE_HandleCtrlC);
 136
 137     if (params->ConsoleHandle == (HANDLE)1)  /* FIXME */
 138     {
 139         HMODULE mod = GetModuleHandleA(0);
 140         if (RtlImageNtHeader(mod)->OptionalHeader.Subsystem == IMAGE_SUBSYSTEM_WINDOWS_CUI)
 141             AllocConsole();
 142     }
 143     /* else TODO for DETACHED_PROCESS:
 144      * 1/ inherit console + handles
 145      * 2/ create std handles, if handles are not inherited
 146      * TBD when not using wineserver handles for console handles
 147      */
 148
 149     return TRUE;
 150 }
 151
 152 /***********************************************************************
 153  *           KERNEL initialisation routine
 154  */
 155 BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
 156 {
 157     switch(reason)
 158     {
 159     case DLL_PROCESS_ATTACH:
 160         DisableThreadLibraryCalls( hinst );
 161         return process_attach( hinst );
 162     case DLL_PROCESS_DETACH:
 163         WritePrivateProfileSectionW( NULL, NULL, NULL );
 164         break;
 165     }
 166     return TRUE;
 167 }
 168
 169 /***********************************************************************
 170  *           MulDiv   (KERNEL32.@)
 171  * RETURNS
 172  *      Result of multiplication and division
 173  *      -1: Overflow occurred or Divisor was 0
 174  */
 175 INT WINAPI MulDiv( INT nMultiplicand, INT nMultiplier, INT nDivisor)
 176 {
 177     LONGLONG ret;
 178
 179     if (!nDivisor) return -1;
 180
 181     /* We want to deal with a positive divisor to simplify the logic. */
 182     if (nDivisor < 0)
 183     {
 184       nMultiplicand = - nMultiplicand;
 185       nDivisor = -nDivisor;
 186     }
 187
 188     /* If the result is positive, we "add" to round. else, we subtract to round. */
 189     if ( ( (nMultiplicand <  0) && (nMultiplier <  0) ) ||
 190          ( (nMultiplicand >= 0) && (nMultiplier >= 0) ) )
 191       ret = (((LONGLONG)nMultiplicand * nMultiplier) + (nDivisor/2)) / nDivisor;
 192     else
 193       ret = (((LONGLONG)nMultiplicand * nMultiplier) - (nDivisor/2)) / nDivisor;
 194
 195     if ((ret > 2147483647) || (ret < -2147483647)) return -1;
 196     return ret;
 197 }
 198
 199
 200 /******************************************************************************
 201  *           GetTickCount64       (KERNEL32.@)
 202  */
 203 ULONGLONG WINAPI GetTickCount64(void)
 204 {
 205     LARGE_INTEGER now;
 206
 207     NtQuerySystemTime( &now );
 208     return (now.QuadPart - server_start_time) / 10000;
 209 }
 210
 211
 212 /***********************************************************************
 213  *           GetTickCount       (KERNEL32.@)
 214  *
 215  * Get the number of milliseconds the system has been running.
 216  *
 217  * PARAMS
 218  *  None.
 219  *
 220  * RETURNS
 221  *  The current tick count.
 222  *
 223  * NOTES
 224  *  The value returned will wrap around every 2^32 milliseconds.
 225  *  Under Windows, tick 0 is the moment at which the system is rebooted.
 226  *  Under Wine, tick 0 begins at the moment the wineserver process is started.
 227  */
 228 DWORD WINAPI GetTickCount(void)
 229 {
 230     return GetTickCount64();
 231 }