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 <ctype.h>
  22 #include <stdarg.h>
  23 #include <string.h>
  24 #include <signal.h>
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "winnls.h"
  29 #include "wincon.h"
  30 #include "winternl.h"
  31
  32 #include "kernel_private.h"
  33 #include "wine/debug.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(process);
  36
  37 static STARTUPINFOA startup_infoA;
  38
  39 /***********************************************************************
  40  *           set_entry_point
  41  */
  42 #ifdef __i386__
  43 static void set_entry_point( HMODULE module, const char *name, DWORD rva )
  44 {
  45     IMAGE_EXPORT_DIRECTORY *exports;
  46     DWORD exp_size;
  47
  48     if ((exports = RtlImageDirectoryEntryToData( module, TRUE,
  49                                                   IMAGE_DIRECTORY_ENTRY_EXPORT, &exp_size )))
  50     {
  51         DWORD *functions = (DWORD *)((char *)module + exports->AddressOfFunctions);
  52         const WORD *ordinals = (const WORD *)((const char *)module + exports->AddressOfNameOrdinals);
  53         const DWORD *names = (const DWORD *)((const char *)module +  exports->AddressOfNames);
  54         int min = 0, max = exports->NumberOfNames - 1;
  55
  56         while (min <= max)
  57         {
  58             int res, pos = (min + max) / 2;
  59             const char *ename = (const char *)module + names[pos];
  60             if (!(res = strcmp( ename, name )))
  61             {
  62                 WORD ordinal = ordinals[pos];
  63                 DWORD oldprot;
  64
  65                 TRACE( "setting %s at %p to %08x\n", name, &functions[ordinal], rva );
  66                 VirtualProtect( functions + ordinal, sizeof(*functions), PAGE_READWRITE, &oldprot );
  67                 functions[ordinal] = rva;
  68                 VirtualProtect( functions + ordinal, sizeof(*functions), oldprot, NULL );
  69                 return;
  70             }
  71             if (res > 0) max = pos - 1;
  72             else min = pos + 1;
  73         }
  74     }
  75 }
  76 #endif
  77
  78
  79 /***********************************************************************
  80  *              GetStartupInfoA         (KERNEL32.@)
  81  */
  82 VOID WINAPI GetStartupInfoA( LPSTARTUPINFOA info )
  83 {
  84     *info = startup_infoA;
  85 }
  86
  87 static void copy_startup_info(void)
  88 {
  89     RTL_USER_PROCESS_PARAMETERS* rupp;
  90     ANSI_STRING         ansi;
  91
  92     RtlAcquirePebLock();
  93
  94     rupp = NtCurrentTeb()->Peb->ProcessParameters;
  95
  96     startup_infoA.cb                   = sizeof(startup_infoA);
  97     startup_infoA.lpReserved           = NULL;
  98     startup_infoA.lpDesktop = !RtlUnicodeStringToAnsiString( &ansi, &rupp->Desktop, TRUE ) ? ansi.Buffer : NULL;
  99     startup_infoA.lpTitle = !RtlUnicodeStringToAnsiString( &ansi, &rupp->WindowTitle, TRUE ) ? ansi.Buffer : NULL;
 100     startup_infoA.dwX                  = rupp->dwX;
 101     startup_infoA.dwY                  = rupp->dwY;
 102     startup_infoA.dwXSize              = rupp->dwXSize;
 103     startup_infoA.dwYSize              = rupp->dwYSize;
 104     startup_infoA.dwXCountChars        = rupp->dwXCountChars;
 105     startup_infoA.dwYCountChars        = rupp->dwYCountChars;
 106     startup_infoA.dwFillAttribute      = rupp->dwFillAttribute;
 107     startup_infoA.dwFlags              = rupp->dwFlags;
 108     startup_infoA.wShowWindow          = rupp->wShowWindow;
 109     startup_infoA.cbReserved2          = rupp->RuntimeInfo.MaximumLength;
 110     startup_infoA.lpReserved2          = rupp->RuntimeInfo.MaximumLength ? (void*)rupp->RuntimeInfo.Buffer : NULL;
 111     startup_infoA.hStdInput            = rupp->hStdInput ? rupp->hStdInput : INVALID_HANDLE_VALUE;
 112     startup_infoA.hStdOutput           = rupp->hStdOutput ? rupp->hStdOutput : INVALID_HANDLE_VALUE;
 113     startup_infoA.hStdError            = rupp->hStdError ? rupp->hStdError : INVALID_HANDLE_VALUE;
 114
 115     RtlReleasePebLock();
 116 }
 117
 118 /***********************************************************************
 119  *           KERNEL process initialisation routine
 120  */
 121 static BOOL process_attach( HMODULE module )
 122 {
 123     RtlSetUnhandledExceptionFilter( UnhandledExceptionFilter );
 124
 125     NtQuerySystemInformation( SystemBasicInformation, &system_info, sizeof(system_info), NULL );
 126
 127     copy_startup_info();
 128
 129 #ifdef __i386__
 130     if (!(GetVersion() & 0x80000000))
 131     {
 132         /* Securom checks for this one when version is NT */
 133         set_entry_point( module, "FT_Thunk", 0 );
 134     }
 135     else
 136     {
 137         LDR_DATA_TABLE_ENTRY *ldr;
 138
 139         if (LdrFindEntryForAddress( GetModuleHandleW( 0 ), &ldr ) || !(ldr->Flags & LDR_WINE_INTERNAL))
 140             LoadLibraryA( "krnl386.exe16" );
 141     }
 142 #endif
 143     return TRUE;
 144 }
 145
 146 /***********************************************************************
 147  *           KERNEL initialisation routine
 148  */
 149 BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
 150 {
 151     switch(reason)
 152     {
 153     case DLL_PROCESS_ATTACH:
 154         DisableThreadLibraryCalls( hinst );
 155         return process_attach( hinst );
 156     case DLL_PROCESS_DETACH:
 157         WritePrivateProfileSectionW( NULL, NULL, NULL );
 158         break;
 159     }
 160     return TRUE;
 161 }
 162
 163 /***********************************************************************
 164  *           MulDiv   (KERNEL32.@)
 165  * RETURNS
 166  *      Result of multiplication and division
 167  *      -1: Overflow occurred or Divisor was 0
 168  */
 169 INT WINAPI MulDiv( INT nMultiplicand, INT nMultiplier, INT nDivisor)
 170 {
 171     LONGLONG ret;
 172
 173     if (!nDivisor) return -1;
 174
 175     /* We want to deal with a positive divisor to simplify the logic. */
 176     if (nDivisor < 0)
 177     {
 178       nMultiplicand = - nMultiplicand;
 179       nDivisor = -nDivisor;
 180     }
 181
 182     /* If the result is positive, we "add" to round. else, we subtract to round. */
 183     if ( ( (nMultiplicand <  0) && (nMultiplier <  0) ) ||
 184          ( (nMultiplicand >= 0) && (nMultiplier >= 0) ) )
 185       ret = (((LONGLONG)nMultiplicand * nMultiplier) + (nDivisor/2)) / nDivisor;
 186     else
 187       ret = (((LONGLONG)nMultiplicand * nMultiplier) - (nDivisor/2)) / nDivisor;
 188
 189     if ((ret > 2147483647) || (ret < -2147483647)) return -1;
 190     return ret;
 191 }
 192
 193 /******************************************************************************
 194  *           GetSystemRegistryQuota       (KERNEL32.@)
 195  */
 196 BOOL WINAPI GetSystemRegistryQuota(PDWORD pdwQuotaAllowed, PDWORD pdwQuotaUsed)
 197 {
 198     FIXME("(%p, %p) faking reported quota values\n", pdwQuotaAllowed, pdwQuotaUsed);
 199
 200     if (pdwQuotaAllowed)
 201         *pdwQuotaAllowed = 2 * 1000 * 1000 * 1000; /* 2 GB */
 202
 203     if (pdwQuotaUsed)
 204         *pdwQuotaUsed = 100 * 1000 * 1000; /* 100 MB */
 205
 206     return TRUE;
 207 }