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 "winnls.h"
  33 #include "wincon.h"
  34 #include "winternl.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 /***********************************************************************
  46  *           set_entry_point
  47  */
  48 static void set_entry_point( HMODULE module, const char *name, DWORD rva )
  49 {
  50     IMAGE_EXPORT_DIRECTORY *exports;
  51     DWORD exp_size;
  52
  53     if ((exports = RtlImageDirectoryEntryToData( module, TRUE,
  54                                                   IMAGE_DIRECTORY_ENTRY_EXPORT, &exp_size )))
  55     {
  56         DWORD *functions = (DWORD *)((char *)module + exports->AddressOfFunctions);
  57         const WORD *ordinals = (const WORD *)((const char *)module + exports->AddressOfNameOrdinals);
  58         const DWORD *names = (const DWORD *)((const char *)module +  exports->AddressOfNames);
  59         int min = 0, max = exports->NumberOfNames - 1;
  60
  61         while (min <= max)
  62         {
  63             int res, pos = (min + max) / 2;
  64             const char *ename = (const char *)module + names[pos];
  65             if (!(res = strcmp( ename, name )))
  66             {
  67                 WORD ordinal = ordinals[pos];
  68                 assert( ordinal < exports->NumberOfFunctions );
  69                 TRACE( "setting %s at %p to %08x\n", name, &functions[ordinal], rva );
  70                 functions[ordinal] = rva;
  71                 return;
  72             }
  73             if (res > 0) max = pos - 1;
  74             else min = pos + 1;
  75         }
  76     }
  77 }
  78
  79
  80 /***********************************************************************
  81  *           KERNEL process initialisation routine
  82  */
  83 static BOOL process_attach( HMODULE module )
  84 {
  85     RTL_USER_PROCESS_PARAMETERS *params = NtCurrentTeb()->Peb->ProcessParameters;
  86
  87     kernel32_handle = module;
  88     RtlSetUnhandledExceptionFilter( UnhandledExceptionFilter );
  89
  90     NtQuerySystemInformation( SystemBasicInformation, &system_info, sizeof(system_info), NULL );
  91
  92     /* Setup computer name */
  93     COMPUTERNAME_Init();
  94
  95     CONSOLE_Init(params);
  96
  97     /* copy process information from ntdll */
  98     ENV_CopyStartupInformation();
  99
 100     if (!(GetVersion() & 0x80000000))
 101     {
 102         /* Securom checks for this one when version is NT */
 103         set_entry_point( module, "FT_Thunk", 0 );
 104     }
 105     else
 106     {
 107         LDR_MODULE *ldr;
 108
 109         if (LdrFindEntryForAddress( GetModuleHandleW( 0 ), &ldr ) || !(ldr->Flags & LDR_WINE_INTERNAL))
 110             LoadLibraryA( "krnl386.exe16" );
 111     }
 112
 113     /* finish the process initialisation for console bits, if needed */
 114     __wine_set_signal_handler(SIGINT, CONSOLE_HandleCtrlC);
 115
 116     if (params->ConsoleHandle == KERNEL32_CONSOLE_ALLOC)
 117     {
 118         HMODULE mod = GetModuleHandleA(0);
 119         if (RtlImageNtHeader(mod)->OptionalHeader.Subsystem == IMAGE_SUBSYSTEM_WINDOWS_CUI)
 120             AllocConsole();
 121     }
 122     /* else TODO for DETACHED_PROCESS:
 123      * 1/ inherit console + handles
 124      * 2/ create std handles, if handles are not inherited
 125      * TBD when not using wineserver handles for console handles
 126      */
 127
 128     return TRUE;
 129 }
 130
 131 /***********************************************************************
 132  *           KERNEL initialisation routine
 133  */
 134 BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
 135 {
 136     switch(reason)
 137     {
 138     case DLL_PROCESS_ATTACH:
 139         DisableThreadLibraryCalls( hinst );
 140         return process_attach( hinst );
 141     case DLL_PROCESS_DETACH:
 142         WritePrivateProfileSectionW( NULL, NULL, NULL );
 143         CONSOLE_Exit();
 144         break;
 145     }
 146     return TRUE;
 147 }
 148
 149 /***********************************************************************
 150  *           MulDiv   (KERNEL32.@)
 151  * RETURNS
 152  *      Result of multiplication and division
 153  *      -1: Overflow occurred or Divisor was 0
 154  */
 155 INT WINAPI MulDiv( INT nMultiplicand, INT nMultiplier, INT nDivisor)
 156 {
 157     LONGLONG ret;
 158
 159     if (!nDivisor) return -1;
 160
 161     /* We want to deal with a positive divisor to simplify the logic. */
 162     if (nDivisor < 0)
 163     {
 164       nMultiplicand = - nMultiplicand;
 165       nDivisor = -nDivisor;
 166     }
 167
 168     /* If the result is positive, we "add" to round. else, we subtract to round. */
 169     if ( ( (nMultiplicand <  0) && (nMultiplier <  0) ) ||
 170          ( (nMultiplicand >= 0) && (nMultiplier >= 0) ) )
 171       ret = (((LONGLONG)nMultiplicand * nMultiplier) + (nDivisor/2)) / nDivisor;
 172     else
 173       ret = (((LONGLONG)nMultiplicand * nMultiplier) - (nDivisor/2)) / nDivisor;
 174
 175     if ((ret > 2147483647) || (ret < -2147483647)) return -1;
 176     return ret;
 177 }
 178
 179 /******************************************************************************
 180  *           GetSystemRegistryQuota       (KERNEL32.@)
 181  */
 182 BOOL WINAPI GetSystemRegistryQuota(PDWORD pdwQuotaAllowed, PDWORD pdwQuotaUsed)
 183 {
 184     FIXME("(%p, %p) faking reported quota values\n", pdwQuotaAllowed, pdwQuotaUsed);
 185
 186     if (pdwQuotaAllowed)
 187         *pdwQuotaAllowed = 2 * 1000 * 1000 * 1000; /* 2 GB */
 188
 189     if (pdwQuotaUsed)
 190         *pdwQuotaUsed = 100 * 1000 * 1000; /* 100 MB */
 191
 192     return TRUE;
 193 }