Sweden-Number/msdos/int13.c

101 lines
2.8 KiB
C

/*
* BIOS interrupt 13h handler
*
* Copyright 1997 Andreas Mohr
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include <stdlib.h>
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "winbase.h"
#include "winioctl.h"
#include "miscemu.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(int);
static void DIOCRegs_2_CONTEXT( DIOC_REGISTERS *pIn, CONTEXT86 *pCxt )
{
memset( pCxt, 0, sizeof(*pCxt) );
/* Note: segment registers == 0 means that CTX_SEG_OFF_TO_LIN
will interpret 32-bit register contents as linear pointers */
pCxt->ContextFlags=CONTEXT86_INTEGER|CONTEXT86_CONTROL;
pCxt->Eax = pIn->reg_EAX;
pCxt->Ebx = pIn->reg_EBX;
pCxt->Ecx = pIn->reg_ECX;
pCxt->Edx = pIn->reg_EDX;
pCxt->Esi = pIn->reg_ESI;
pCxt->Edi = pIn->reg_EDI;
/* FIXME: Only partial CONTEXT86_CONTROL */
pCxt->EFlags = pIn->reg_Flags;
}
static void CONTEXT_2_DIOCRegs( CONTEXT86 *pCxt, DIOC_REGISTERS *pOut )
{
memset( pOut, 0, sizeof(DIOC_REGISTERS) );
pOut->reg_EAX = pCxt->Eax;
pOut->reg_EBX = pCxt->Ebx;
pOut->reg_ECX = pCxt->Ecx;
pOut->reg_EDX = pCxt->Edx;
pOut->reg_ESI = pCxt->Esi;
pOut->reg_EDI = pCxt->Edi;
/* FIXME: Only partial CONTEXT86_CONTROL */
pOut->reg_Flags = pCxt->EFlags;
}
/**********************************************************************
* INT_Int13Handler (WPROCS.119)
*
* Handler for int 13h (disk I/O).
*/
void WINAPI INT_Int13Handler( CONTEXT86 *context )
{
HANDLE hVWin32;
DIOC_REGISTERS regs;
DWORD dwRet;
hVWin32 = CreateFileA("\\\\.\\VWIN32", GENERIC_READ|GENERIC_WRITE,
0, NULL, OPEN_EXISTING, FILE_FLAG_DELETE_ON_CLOSE, 0);
if(hVWin32!=INVALID_HANDLE_VALUE)
{
CONTEXT_2_DIOCRegs( context, &regs);
if(!DeviceIoControl(hVWin32, VWIN32_DIOC_DOS_INT13,
&regs, sizeof regs, &regs, sizeof regs, &dwRet, NULL))
DIOCRegs_2_CONTEXT(&regs, context);
else
SET_CFLAG(context);
CloseHandle(hVWin32);
}
else
{
ERR("Failed to open device VWIN32\n");
SET_CFLAG(context);
}
}