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