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/winbase16.h"
  37 #include "wine/library.h"
  38 #include "wincon.h"
  39 #include "toolhelp.h"
  40 #include "kernel_private.h"
  41 #include "kernel16_private.h"
  42 #include "console_private.h"
  43 #include "wine/debug.h"
  44
  45 WINE_DEFAULT_DEBUG_CHANNEL(process);
  46
  47 extern  int __wine_set_signal_handler(unsigned, int (*)(unsigned));
  48
  49 /***********************************************************************
  50  *           KERNEL thread initialisation routine
  51  */
  52 static void thread_attach(void)
  53 {
  54     /* allocate the 16-bit stack (FIXME: should be done lazily) */
  55     HGLOBAL16 hstack = WOWGlobalAlloc16( GMEM_FIXED, 0x10000 );
  56     kernel_get_thread_data()->stack_sel = GlobalHandleToSel16( hstack );
  57     NtCurrentTeb()->WOW32Reserved = (void *)MAKESEGPTR( kernel_get_thread_data()->stack_sel,
  58                                                         0x10000 - sizeof(STACK16FRAME) );
  59 }
  60
  61
  62 /***********************************************************************
  63  *           KERNEL thread finalisation routine
  64  */
  65 static void thread_detach(void)
  66 {
  67     /* free the 16-bit stack */
  68     WOWGlobalFree16( kernel_get_thread_data()->stack_sel );
  69     NtCurrentTeb()->WOW32Reserved = 0;
  70     if (NtCurrentTeb()->Tib.SubSystemTib) TASK_ExitTask();
  71 }
  72
  73
  74 /***********************************************************************
  75  *           set_entry_point
  76  */
  77 static void set_entry_point( HMODULE module, const char *name, DWORD rva )
  78 {
  79     IMAGE_EXPORT_DIRECTORY *exports;
  80     DWORD exp_size;
  81
  82     if ((exports = RtlImageDirectoryEntryToData( module, TRUE,
  83                                                   IMAGE_DIRECTORY_ENTRY_EXPORT, &exp_size )))
  84     {
  85         DWORD *functions = (DWORD *)((char *)module + exports->AddressOfFunctions);
  86         const WORD *ordinals = (const WORD *)((const char *)module + exports->AddressOfNameOrdinals);
  87         const DWORD *names = (const DWORD *)((const char *)module +  exports->AddressOfNames);
  88         int min = 0, max = exports->NumberOfNames - 1;
  89
  90         while (min <= max)
  91         {
  92             int res, pos = (min + max) / 2;
  93             const char *ename = (const char *)module + names[pos];
  94             if (!(res = strcmp( ename, name )))
  95             {
  96                 WORD ordinal = ordinals[pos];
  97                 assert( ordinal < exports->NumberOfFunctions );
  98                 TRACE( "setting %s at %p to %08x\n", name, &functions[ordinal], rva );
  99                 functions[ordinal] = rva;
 100                 return;
 101             }
 102             if (res > 0) max = pos - 1;
 103             else min = pos + 1;
 104         }
 105     }
 106 }
 107
 108
 109 /***********************************************************************
 110  *           KERNEL process initialisation routine
 111  */
 112 static BOOL process_attach( HMODULE module )
 113 {
 114     SYSTEM_INFO si;
 115     RTL_USER_PROCESS_PARAMETERS *params = NtCurrentTeb()->Peb->ProcessParameters;
 116
 117     /* FIXME: should probably be done in ntdll */
 118     GetSystemInfo( &si );
 119     NtCurrentTeb()->Peb->NumberOfProcessors = si.dwNumberOfProcessors;
 120
 121     /* Setup registry locale information */
 122     LOCALE_InitRegistry();
 123
 124     /* Setup computer name */
 125     COMPUTERNAME_Init();
 126
 127     /* convert value from server:
 128      * + 0 => INVALID_HANDLE_VALUE
 129      * + console handle needs to be mapped
 130      */
 131     if (!params->hStdInput)
 132         params->hStdInput = INVALID_HANDLE_VALUE;
 133     else if (VerifyConsoleIoHandle(console_handle_map(params->hStdInput)))
 134         params->hStdInput = console_handle_map(params->hStdInput);
 135
 136     if (!params->hStdOutput)
 137         params->hStdOutput = INVALID_HANDLE_VALUE;
 138     else if (VerifyConsoleIoHandle(console_handle_map(params->hStdOutput)))
 139         params->hStdOutput = console_handle_map(params->hStdOutput);
 140
 141     if (!params->hStdError)
 142         params->hStdError = INVALID_HANDLE_VALUE;
 143     else if (VerifyConsoleIoHandle(console_handle_map(params->hStdError)))
 144         params->hStdError = console_handle_map(params->hStdError);
 145
 146     /* copy process information from ntdll */
 147     ENV_CopyStartupInformation();
 148
 149     if (!(GetVersion() & 0x80000000))
 150     {
 151         /* Securom checks for this one when version is NT */
 152         set_entry_point( module, "FT_Thunk", 0 );
 153     }
 154 #ifdef __i386__
 155     else
 156     {
 157         /* create the shared heap for broken win95 native dlls */
 158         HeapCreate( HEAP_SHARED, 0, 0 );
 159         /* setup emulation of protected instructions from 32-bit code */
 160         RtlAddVectoredExceptionHandler( TRUE, INSTR_vectored_handler );
 161     }
 162 #endif
 163
 164     /* finish the process initialisation for console bits, if needed */
 165     __wine_set_signal_handler(SIGINT, CONSOLE_HandleCtrlC);
 166
 167     if (params->ConsoleHandle == (HANDLE)1)  /* FIXME */
 168     {
 169         HMODULE mod = GetModuleHandleA(0);
 170         if (RtlImageNtHeader(mod)->OptionalHeader.Subsystem == IMAGE_SUBSYSTEM_WINDOWS_CUI)
 171             AllocConsole();
 172     }
 173     /* else TODO for DETACHED_PROCESS:
 174      * 1/ inherit console + handles
 175      * 2/ create std handles, if handles are not inherited
 176      * TBD when not using wineserver handles for console handles
 177      */
 178
 179     /* Create 16-bit task */
 180     LoadLibrary16( "krnl386.exe" );
 181     thread_attach();
 182     TASK_CreateMainTask();
 183     return TRUE;
 184 }
 185
 186 /***********************************************************************
 187  *           KERNEL initialisation routine
 188  */
 189 BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
 190 {
 191     switch(reason)
 192     {
 193     case DLL_PROCESS_ATTACH:
 194         return process_attach( hinst );
 195     case DLL_THREAD_ATTACH:
 196         thread_attach();
 197         break;
 198     case DLL_THREAD_DETACH:
 199         thread_detach();
 200         break;
 201     case DLL_PROCESS_DETACH:
 202         WriteOutProfiles16();
 203         break;
 204     }
 205     return TRUE;
 206 }
 207
 208 /***********************************************************************
 209  *           MulDiv   (KERNEL32.@)
 210  * RETURNS
 211  *      Result of multiplication and division
 212  *      -1: Overflow occurred or Divisor was 0
 213  */
 214 INT WINAPI MulDiv( INT nMultiplicand, INT nMultiplier, INT nDivisor)
 215 {
 216     LONGLONG ret;
 217
 218     if (!nDivisor) return -1;
 219
 220     /* We want to deal with a positive divisor to simplify the logic. */
 221     if (nDivisor < 0)
 222     {
 223       nMultiplicand = - nMultiplicand;
 224       nDivisor = -nDivisor;
 225     }
 226
 227     /* If the result is positive, we "add" to round. else, we subtract to round. */
 228     if ( ( (nMultiplicand <  0) && (nMultiplier <  0) ) ||
 229          ( (nMultiplicand >= 0) && (nMultiplier >= 0) ) )
 230       ret = (((LONGLONG)nMultiplicand * nMultiplier) + (nDivisor/2)) / nDivisor;
 231     else
 232       ret = (((LONGLONG)nMultiplicand * nMultiplier) - (nDivisor/2)) / nDivisor;
 233
 234     if ((ret > 2147483647) || (ret < -2147483647)) return -1;
 235     return ret;
 236 }
 237
 238
 239 /***********************************************************************
 240  *           GetTickCount       (KERNEL32.@)
 241  *
 242  * Get the number of milliseconds the system has been running.
 243  *
 244  * PARAMS
 245  *  None.
 246  *
 247  * RETURNS
 248  *  The current tick count.
 249  *
 250  * NOTES
 251  *  -The value returned will wrap arounf every 2^32 milliseconds.
 252  *  -Under Windows, tick 0 is the moment at which the system is rebooted.
 253  *  Under Wine, tick 0 begins at the moment the wineserver process is started,
 254  */
 255 DWORD WINAPI GetTickCount(void)
 256 {
 257     return NtGetTickCount();
 258 }