253 lines
8.1 KiB
C
253 lines
8.1 KiB
C
/*
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* VWIN32 VxD implementation
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*
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* Copyright 1998 Marcus Meissner
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* Copyright 1998 Ulrich Weigand
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* Copyright 1998 Patrik Stridvall
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <stdarg.h>
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#include "windef.h"
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#include "winbase.h"
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#include "winioctl.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(vxd);
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typedef struct tagDIOCRegs {
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DWORD reg_EBX;
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DWORD reg_EDX;
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DWORD reg_ECX;
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DWORD reg_EAX;
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DWORD reg_EDI;
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DWORD reg_ESI;
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DWORD reg_Flags;
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} DIOC_REGISTERS, *PDIOC_REGISTERS;
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#define VWIN32_DIOC_DOS_IOCTL 1 /* This is the specified MS-DOS device I/O ctl - Interrupt 21h Function 4400h - 4411h */
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#define VWIN32_DIOC_DOS_INT25 2 /* This is the Absolute Disk Read command - Interrupt 25h */
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#define VWIN32_DIOC_DOS_INT26 3 /* This is the Absolute Disk Write command - Interrupt 25h */
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#define VWIN32_DIOC_DOS_INT13 4 /* This is Interrupt 13h commands */
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#define VWIN32_DIOC_SIMCTRLC 5 /* Simulate Ctrl-C */
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#define VWIN32_DIOC_DOS_DRIVEINFO 6 /* This is Interrupt 21h Function 730X commands */
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#include <pshpack1.h>
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typedef struct tagMID {
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WORD midInfoLevel;
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DWORD midSerialNum;
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BYTE midVolLabel[11];
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BYTE midFileSysType[8];
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} MID, *PMID;
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#include <poppack.h>
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typedef void (WINAPI *CallBuiltinHandler)( CONTEXT *context, BYTE intnum );
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static CallBuiltinHandler load_builtin_handler(void)
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{
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static CallBuiltinHandler handler;
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static BOOL init_done;
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if (!init_done)
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{
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HMODULE mod = LoadLibraryA( "winedos.dll" );
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if (mod) handler = (void *)GetProcAddress( mod, "CallBuiltinHandler" );
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if (!handler) FIXME( "DOS calls not supported\n" );
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init_done = TRUE;
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}
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return handler;
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}
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/* Pop a DWORD from the 32-bit stack */
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static inline DWORD stack32_pop( CONTEXT86 *context )
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{
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DWORD ret = *(DWORD *)context->Esp;
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context->Esp += sizeof(DWORD);
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return ret;
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}
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static void DIOCRegs_2_CONTEXT( DIOC_REGISTERS *pIn, CONTEXT86 *pCxt )
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{
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memset( pCxt, 0, sizeof(*pCxt) );
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/* Note: segment registers == 0 means that CTX_SEG_OFF_TO_LIN
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will interpret 32-bit register contents as linear pointers */
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pCxt->ContextFlags=CONTEXT86_INTEGER|CONTEXT86_CONTROL;
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pCxt->Eax = pIn->reg_EAX;
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pCxt->Ebx = pIn->reg_EBX;
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pCxt->Ecx = pIn->reg_ECX;
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pCxt->Edx = pIn->reg_EDX;
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pCxt->Esi = pIn->reg_ESI;
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pCxt->Edi = pIn->reg_EDI;
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/* FIXME: Only partial CONTEXT86_CONTROL */
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pCxt->EFlags = pIn->reg_Flags & ~0x00020000; /* clear vm86 mode */
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}
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static void CONTEXT_2_DIOCRegs( CONTEXT86 *pCxt, DIOC_REGISTERS *pOut )
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{
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memset( pOut, 0, sizeof(DIOC_REGISTERS) );
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pOut->reg_EAX = pCxt->Eax;
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pOut->reg_EBX = pCxt->Ebx;
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pOut->reg_ECX = pCxt->Ecx;
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pOut->reg_EDX = pCxt->Edx;
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pOut->reg_ESI = pCxt->Esi;
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pOut->reg_EDI = pCxt->Edi;
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/* FIXME: Only partial CONTEXT86_CONTROL */
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pOut->reg_Flags = pCxt->EFlags;
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}
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/***********************************************************************
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* DeviceIoControl (VWIN32.VXD.@)
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*/
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BOOL WINAPI VWIN32_DeviceIoControl(DWORD dwIoControlCode,
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LPVOID lpvInBuffer, DWORD cbInBuffer,
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LPVOID lpvOutBuffer, DWORD cbOutBuffer,
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LPDWORD lpcbBytesReturned, LPOVERLAPPED lpOverlapped)
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{
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switch (dwIoControlCode)
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{
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case VWIN32_DIOC_DOS_IOCTL:
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case 0x10: /* Int 0x21 call, call it VWIN_DIOC_INT21 ? */
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case VWIN32_DIOC_DOS_INT13:
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case VWIN32_DIOC_DOS_INT25:
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case VWIN32_DIOC_DOS_INT26:
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case 0x29: /* Int 0x31 call, call it VWIN_DIOC_INT31 ? */
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case VWIN32_DIOC_DOS_DRIVEINFO:
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{
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CONTEXT86 cxt;
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DIOC_REGISTERS *pIn = lpvInBuffer;
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DIOC_REGISTERS *pOut = lpvOutBuffer;
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BYTE intnum = 0;
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CallBuiltinHandler handler;
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if (!(handler = load_builtin_handler()))
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{
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pOut->reg_Flags |= 0x0001;
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return FALSE;
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}
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TRACE( "Control '%s': "
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"eax=0x%08x, ebx=0x%08x, ecx=0x%08x, "
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"edx=0x%08x, esi=0x%08x, edi=0x%08x\n",
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(dwIoControlCode == VWIN32_DIOC_DOS_IOCTL)? "VWIN32_DIOC_DOS_IOCTL" :
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(dwIoControlCode == VWIN32_DIOC_DOS_INT25)? "VWIN32_DIOC_DOS_INT25" :
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(dwIoControlCode == VWIN32_DIOC_DOS_INT26)? "VWIN32_DIOC_DOS_INT26" :
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(dwIoControlCode == VWIN32_DIOC_DOS_DRIVEINFO)? "VWIN32_DIOC_DOS_DRIVEINFO" : "???",
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pIn->reg_EAX, pIn->reg_EBX, pIn->reg_ECX,
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pIn->reg_EDX, pIn->reg_ESI, pIn->reg_EDI );
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DIOCRegs_2_CONTEXT( pIn, &cxt );
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switch (dwIoControlCode)
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{
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case VWIN32_DIOC_DOS_IOCTL: /* Call int 21h */
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case 0x10: /* Int 0x21 call, call it VWIN_DIOC_INT21 ? */
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case VWIN32_DIOC_DOS_DRIVEINFO: /* Call int 21h 730x */
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intnum = 0x21;
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break;
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case VWIN32_DIOC_DOS_INT13:
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intnum = 0x13;
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break;
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case VWIN32_DIOC_DOS_INT25:
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intnum = 0x25;
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break;
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case VWIN32_DIOC_DOS_INT26:
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intnum = 0x26;
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break;
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case 0x29: /* Int 0x31 call, call it VWIN_DIOC_INT31 ? */
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intnum = 0x31;
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break;
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}
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handler( &cxt, intnum );
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CONTEXT_2_DIOCRegs( &cxt, pOut );
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}
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return TRUE;
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case VWIN32_DIOC_SIMCTRLC:
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FIXME( "Control VWIN32_DIOC_SIMCTRLC not implemented\n");
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return FALSE;
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default:
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FIXME( "Unknown Control %d\n", dwIoControlCode);
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return FALSE;
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}
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}
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/***********************************************************************
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* VxDCall (VWIN32.VXD.@)
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*
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* Service numbers taken from page 448 of Pietrek's "Windows 95 System
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* Programming Secrets". Parameters from experimentation on real Win98.
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*
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*/
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DWORD WINAPI VWIN32_VxDCall( DWORD service, CONTEXT86 *context )
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{
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switch ( LOWORD(service) )
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{
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case 0x0000: /* GetVersion */
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{
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DWORD vers = GetVersion();
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return (LOBYTE(vers) << 8) | HIBYTE(vers);
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}
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case 0x0020: /* Get VMCPD Version */
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{
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DWORD parm = stack32_pop(context);
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FIXME("Get VMCPD Version(%08x): partial stub!\n", parm);
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/* FIXME: This is what Win98 returns, it may
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* not be correct in all situations.
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* It makes Bleem! happy though.
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*/
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return 0x0405;
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}
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case 0x0029: /* Int31/DPMI dispatch */
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{
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DWORD callnum = stack32_pop(context);
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DWORD parm = stack32_pop(context);
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CallBuiltinHandler handler;
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TRACE("Int31/DPMI dispatch(%08x)\n", callnum);
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if (!(handler = load_builtin_handler()))
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{
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context->EFlags |= 0x0001;
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return 0;
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}
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context->Eax = callnum;
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context->Ecx = parm;
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handler( context, 0x31 );
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return LOWORD(context->Eax);
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}
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case 0x002a: /* Int41 dispatch - parm = int41 service number */
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{
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DWORD callnum = stack32_pop(context);
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return callnum; /* FIXME: should really call INT_Int41Handler() */
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}
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default:
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FIXME("Unknown service %08x\n", service);
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return 0xffffffff;
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}
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}
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