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