msdos/int13.c

   1 /*
   2  * BIOS interrupt 13h handler
   3  *
   4  * Copyright 1997 Andreas Mohr
   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24 #include <sys/types.h>
  25 #ifdef HAVE_UNISTD_H
  26 # include <unistd.h>
  27 #endif
  28
  29 #include "winbase.h"
  30 #include "winioctl.h"
  31 #include "miscemu.h"
  32 #include "wine/debug.h"
  33
  34 WINE_DEFAULT_DEBUG_CHANNEL(int);
  35
  36 static void DIOCRegs_2_CONTEXT( DIOC_REGISTERS *pIn, CONTEXT86 *pCxt )
  37 {
  38     memset( pCxt, 0, sizeof(*pCxt) );
  39     /* Note: segment registers == 0 means that CTX_SEG_OFF_TO_LIN
  40              will interpret 32-bit register contents as linear pointers */
  41
  42     pCxt->ContextFlags=CONTEXT86_INTEGER|CONTEXT86_CONTROL;
  43     pCxt->Eax = pIn->reg_EAX;
  44     pCxt->Ebx = pIn->reg_EBX;
  45     pCxt->Ecx = pIn->reg_ECX;
  46     pCxt->Edx = pIn->reg_EDX;
  47     pCxt->Esi = pIn->reg_ESI;
  48     pCxt->Edi = pIn->reg_EDI;
  49
  50     /* FIXME: Only partial CONTEXT86_CONTROL */
  51     pCxt->EFlags = pIn->reg_Flags;
  52 }
  53
  54 static void CONTEXT_2_DIOCRegs( CONTEXT86 *pCxt, DIOC_REGISTERS *pOut )
  55 {
  56     memset( pOut, 0, sizeof(DIOC_REGISTERS) );
  57
  58     pOut->reg_EAX = pCxt->Eax;
  59     pOut->reg_EBX = pCxt->Ebx;
  60     pOut->reg_ECX = pCxt->Ecx;
  61     pOut->reg_EDX = pCxt->Edx;
  62     pOut->reg_ESI = pCxt->Esi;
  63     pOut->reg_EDI = pCxt->Edi;
  64
  65     /* FIXME: Only partial CONTEXT86_CONTROL */
  66     pOut->reg_Flags = pCxt->EFlags;
  67 }
  68
  69 /**********************************************************************
  70  *          INT_Int13Handler (WPROCS.119)
  71  *
  72  * Handler for int 13h (disk I/O).
  73  */
  74 void WINAPI INT_Int13Handler( CONTEXT86 *context )
  75 {
  76     HANDLE hVWin32;
  77     DIOC_REGISTERS regs;
  78     DWORD dwRet;
  79
  80     hVWin32 = CreateFileA("\\\\.\\VWIN32", GENERIC_READ|GENERIC_WRITE,
  81                0, NULL, OPEN_EXISTING, FILE_FLAG_DELETE_ON_CLOSE, 0);
  82
  83     if(hVWin32!=INVALID_HANDLE_VALUE)
  84     {
  85         CONTEXT_2_DIOCRegs( context, &regs);
  86
  87         if(!DeviceIoControl(hVWin32, VWIN32_DIOC_DOS_INT13,
  88                 &regs, sizeof regs, &regs, sizeof regs, &dwRet, NULL))
  89             DIOCRegs_2_CONTEXT(&regs, context);
  90         else
  91             SET_CFLAG(context);
  92
  93         CloseHandle(hVWin32);
  94     }
  95     else
  96     {
  97         ERR("Failed to open device VWIN32\n");
  98         SET_CFLAG(context);
  99     }
 100 }