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
 105     {
 106         LDR_MODULE *ldr;
 107
 108         if (LdrFindEntryForAddress( GetModuleHandleW( 0 ), &ldr ) || !(ldr->Flags & LDR_WINE_INTERNAL))
 109             LoadLibraryA( "krnl386.exe16" );
 110     }
 111
 112     /* finish the process initialisation for console bits, if needed */
 113     __wine_set_signal_handler(SIGINT, CONSOLE_HandleCtrlC);
 114
 115     if (params->ConsoleHandle == KERNEL32_CONSOLE_ALLOC)
 116     {
 117         HMODULE mod = GetModuleHandleA(0);
 118         if (RtlImageNtHeader(mod)->OptionalHeader.Subsystem == IMAGE_SUBSYSTEM_WINDOWS_CUI)
 119             AllocConsole();
 120     }
 121     /* else TODO for DETACHED_PROCESS:
 122      * 1/ inherit console + handles
 123      * 2/ create std handles, if handles are not inherited
 124      * TBD when not using wineserver handles for console handles
 125      */
 126
 127     return TRUE;
 128 }
 129
 130 /***********************************************************************
 131  *           KERNEL initialisation routine
 132  */
 133 BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
 134 {
 135     switch(reason)
 136     {
 137     case DLL_PROCESS_ATTACH:
 138         DisableThreadLibraryCalls( hinst );
 139         return process_attach( hinst );
 140     case DLL_PROCESS_DETACH:
 141         WritePrivateProfileSectionW( NULL, NULL, NULL );
 142         CONSOLE_Exit();
 143         break;
 144     }
 145     return TRUE;
 146 }
 147
 148 /***********************************************************************
 149  *           MulDiv   (KERNEL32.@)
 150  * RETURNS
 151  *      Result of multiplication and division
 152  *      -1: Overflow occurred or Divisor was 0
 153  */
 154 INT WINAPI MulDiv( INT nMultiplicand, INT nMultiplier, INT nDivisor)
 155 {
 156     LONGLONG ret;
 157
 158     if (!nDivisor) return -1;
 159
 160     /* We want to deal with a positive divisor to simplify the logic. */
 161     if (nDivisor < 0)
 162     {
 163       nMultiplicand = - nMultiplicand;
 164       nDivisor = -nDivisor;
 165     }
 166
 167     /* If the result is positive, we "add" to round. else, we subtract to round. */
 168     if ( ( (nMultiplicand <  0) && (nMultiplier <  0) ) ||
 169          ( (nMultiplicand >= 0) && (nMultiplier >= 0) ) )
 170       ret = (((LONGLONG)nMultiplicand * nMultiplier) + (nDivisor/2)) / nDivisor;
 171     else
 172       ret = (((LONGLONG)nMultiplicand * nMultiplier) - (nDivisor/2)) / nDivisor;
 173
 174     if ((ret > 2147483647) || (ret < -2147483647)) return -1;
 175     return ret;
 176 }
 177
 178
 179 /******************************************************************************
 180  *           GetTickCount64       (KERNEL32.@)
 181  */
 182 ULONGLONG WINAPI GetTickCount64(void)
 183 {
 184     LARGE_INTEGER counter, frequency;
 185
 186     NtQueryPerformanceCounter( &counter, &frequency );
 187     return counter.QuadPart * 1000 / frequency.QuadPart;
 188 }
 189
 190
 191 /***********************************************************************
 192  *           GetTickCount       (KERNEL32.@)
 193  *
 194  * Get the number of milliseconds the system has been running.
 195  *
 196  * PARAMS
 197  *  None.
 198  *
 199  * RETURNS
 200  *  The current tick count.
 201  *
 202  * NOTES
 203  *  The value returned will wrap around every 2^32 milliseconds.
 204  */
 205 DWORD WINAPI GetTickCount(void)
 206 {
 207     return GetTickCount64();
 208 }
 209
 210 /******************************************************************************
 211  *           GetSystemRegistryQuota       (KERNEL32.@)
 212  */
 213 BOOL WINAPI GetSystemRegistryQuota(PDWORD pdwQuotaAllowed, PDWORD pdwQuotaUsed)
 214 {
 215     FIXME("(%p, %p) faking reported quota values\n", pdwQuotaAllowed, pdwQuotaUsed);
 216
 217     if (pdwQuotaAllowed)
 218         *pdwQuotaAllowed = 2 * 1000 * 1000 * 1000; /* 2 GB */
 219
 220     if (pdwQuotaUsed)
 221         *pdwQuotaUsed = 100 * 1000 * 1000; /* 100 MB */
 222
 223     return TRUE;
 224 }