dlls/kernel32/kernel16.c

   1 /*
   2  * 16-bit 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 <stdarg.h>
  22
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "winternl.h"
  26 #include "wownt32.h"
  27
  28 #include "toolhelp.h"
  29 #include "kernel_private.h"
  30 #include "kernel16_private.h"
  31
  32 /**************************************************************************
  33  *              DllEntryPoint   (KERNEL.669)
  34  */
  35 BOOL WINAPI KERNEL_DllEntryPoint( DWORD reasion, HINSTANCE16 inst, WORD ds,
  36                                   WORD heap, DWORD reserved1, WORD reserved2 )
  37 {
  38     static int done;
  39
  40     /* the entry point can be called multiple times */
  41     if (done) return TRUE;
  42     done = 1;
  43
  44     /* Initialize 16-bit thunking entry points */
  45     if (!WOWTHUNK_Init()) return FALSE;
  46
  47     /* Initialize DOS memory */
  48     if (!DOSMEM_Init()) return FALSE;
  49
  50     /* Initialize special KERNEL entry points */
  51
  52     NE_SetEntryPoint( inst, 178, GetWinFlags16() );
  53
  54     NE_SetEntryPoint( inst, 454, wine_get_cs() );
  55     NE_SetEntryPoint( inst, 455, wine_get_ds() );
  56
  57     NE_SetEntryPoint( inst, 183, DOSMEM_0000H );       /* KERNEL.183: __0000H */
  58     NE_SetEntryPoint( inst, 173, DOSMEM_BiosSysSeg );  /* KERNEL.173: __ROMBIOS */
  59     NE_SetEntryPoint( inst, 193, DOSMEM_BiosDataSeg ); /* KERNEL.193: __0040H */
  60     NE_SetEntryPoint( inst, 194, DOSMEM_BiosSysSeg );  /* KERNEL.194: __F000H */
  61
  62     /* Initialize KERNEL.THHOOK */
  63     TASK_InstallTHHook(MapSL((SEGPTR)GetProcAddress16( inst, (LPCSTR)332 )));
  64
  65     /* Initialize the real-mode selector entry points */
  66 #define SET_ENTRY_POINT( num, addr ) \
  67     NE_SetEntryPoint( inst, (num), GLOBAL_CreateBlock( GMEM_FIXED, \
  68                       DOSMEM_MapDosToLinear(addr), 0x10000, inst, \
  69                       WINE_LDT_FLAGS_DATA ))
  70
  71     SET_ENTRY_POINT( 174, 0xa0000 );  /* KERNEL.174: __A000H */
  72     SET_ENTRY_POINT( 181, 0xb0000 );  /* KERNEL.181: __B000H */
  73     SET_ENTRY_POINT( 182, 0xb8000 );  /* KERNEL.182: __B800H */
  74     SET_ENTRY_POINT( 195, 0xc0000 );  /* KERNEL.195: __C000H */
  75     SET_ENTRY_POINT( 179, 0xd0000 );  /* KERNEL.179: __D000H */
  76     SET_ENTRY_POINT( 190, 0xe0000 );  /* KERNEL.190: __E000H */
  77 #undef SET_ENTRY_POINT
  78
  79     /* Force loading of some dlls */
  80     LoadLibrary16( "system.drv" );
  81
  82     return TRUE;
  83 }
  84
  85 /***********************************************************************
  86  *              EnableDos (KERNEL.41)
  87  *              DisableDos (KERNEL.42)
  88  *              GetLastDiskChange (KERNEL.98)
  89  *              ValidateCodeSegments (KERNEL.100)
  90  *              KbdRst (KERNEL.123)
  91  *              EnableKernel (KERNEL.124)
  92  *              DisableKernel (KERNEL.125)
  93  *              ValidateFreeSpaces (KERNEL.200)
  94  *              K237 (KERNEL.237)
  95  *              BUNNY_351 (KERNEL.351)
  96  *              PIGLET_361 (KERNEL.361)
  97  *
  98  * Entry point for kernel functions that do nothing.
  99  */
 100 LONG WINAPI KERNEL_nop(void)
 101 {
 102     return 0;
 103 }
 104
 105
 106 /* thunk for 16-bit CreateThread */
 107 struct thread_args
 108 {
 109     FARPROC16 proc;
 110     DWORD     param;
 111 };
 112
 113 static DWORD CALLBACK start_thread16( LPVOID threadArgs )
 114 {
 115     struct thread_args args = *(struct thread_args *)threadArgs;
 116     HeapFree( GetProcessHeap(), 0, threadArgs );
 117     return K32WOWCallback16( (DWORD)args.proc, args.param );
 118 }
 119
 120 /***********************************************************************
 121  *           CreateThread16   (KERNEL.441)
 122  */
 123 HANDLE WINAPI CreateThread16( SECURITY_ATTRIBUTES *sa, DWORD stack,
 124                               FARPROC16 start, SEGPTR param,
 125                               DWORD flags, LPDWORD id )
 126 {
 127     struct thread_args *args = HeapAlloc( GetProcessHeap(), 0, sizeof(*args) );
 128     if (!args) return INVALID_HANDLE_VALUE;
 129     args->proc = start;
 130     args->param = param;
 131     return CreateThread( sa, stack, start_thread16, args, flags, id );
 132 }