695 lines
20 KiB
C
695 lines
20 KiB
C
/*
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* DOS Virtual Machine
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*
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* Copyright 1998 Ove Kåven
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Note: This code hasn't been completely cleaned up yet.
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*/
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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef HAVE_SYS_TIME_H
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# include <sys/time.h>
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#endif
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#include <sys/types.h>
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#include "wine/winbase16.h"
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#include "wine/exception.h"
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#include "windef.h"
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#include "winbase.h"
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#include "wingdi.h"
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#include "winuser.h"
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#include "winnt.h"
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#include "wincon.h"
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#include "msdos.h"
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#include "file.h"
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#include "miscemu.h"
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#include "dosexe.h"
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#include "dosvm.h"
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#include "stackframe.h"
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#include "wine/debug.h"
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#include "excpt.h"
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WINE_DEFAULT_DEBUG_CHANNEL(int);
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WINE_DECLARE_DEBUG_CHANNEL(module);
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WINE_DECLARE_DEBUG_CHANNEL(relay);
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WORD DOSVM_psp = 0;
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WORD DOSVM_retval = 0;
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#ifdef MZ_SUPPORTED
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#ifdef HAVE_SYS_VM86_H
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# include <sys/vm86.h>
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#endif
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#ifdef HAVE_SYS_MMAN_H
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# include <sys/mman.h>
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#endif
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typedef struct _DOSEVENT {
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int irq,priority;
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DOSRELAY relay;
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void *data;
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struct _DOSEVENT *next;
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} DOSEVENT, *LPDOSEVENT;
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static CRITICAL_SECTION qcrit = CRITICAL_SECTION_INIT("DOSVM");
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static struct _DOSEVENT *pending_event, *current_event;
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static HANDLE event_notifier;
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/***********************************************************************
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* DOSVM_HasPendingEvents
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*
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* Return true if there are pending events that are not
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* blocked by currently active event.
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*/
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static BOOL DOSVM_HasPendingEvents( void )
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{
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if (!pending_event)
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return FALSE;
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if (!current_event)
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return TRUE;
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if (pending_event->priority < current_event->priority)
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return TRUE;
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return FALSE;
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}
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/***********************************************************************
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* DOSVM_SendOneEvent
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*
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* Process single pending event.
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*
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* This function should be called with queue critical section locked.
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* The function temporarily releases the critical section if it is
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* possible that internal interrupt handler or user procedure will
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* be called. This is because we may otherwise get a deadlock if
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* another thread is waiting for the same critical section.
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*/
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static void DOSVM_SendOneEvent( CONTEXT86 *context )
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{
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LPDOSEVENT event = pending_event;
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/* Remove from pending events list. */
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pending_event = event->next;
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/* Process active event. */
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if (event->irq >= 0)
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{
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BYTE intnum = (event->irq < 8) ?
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(event->irq + 8) : (event->irq - 8 + 0x70);
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/* Event is an IRQ, move it to current events list. */
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event->next = current_event;
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current_event = event;
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TRACE( "Dispatching IRQ %d.\n", event->irq );
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if (ISV86(context))
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{
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/*
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* Note that if DOSVM_HardwareInterruptRM calls an internal
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* interrupt directly, current_event might be cleared
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* (and event freed) in this call.
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*/
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LeaveCriticalSection(&qcrit);
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DOSVM_HardwareInterruptRM( context, intnum );
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EnterCriticalSection(&qcrit);
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}
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else
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{
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/*
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* This routine only modifies current context so it is
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* not necessary to release critical section.
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*/
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DOSVM_HardwareInterruptPM( context, intnum );
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}
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}
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else
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{
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/* Callback event. */
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TRACE( "Dispatching callback event.\n" );
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if (ISV86(context))
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{
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/*
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* Call relay immediately in real mode.
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*/
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LeaveCriticalSection(&qcrit);
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(*event->relay)( context, event->data );
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EnterCriticalSection(&qcrit);
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}
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else
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{
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/*
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* Force return to relay code. We do not want to
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* call relay directly because we may be inside a signal handler.
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*/
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DOSVM_BuildCallFrame( context, event->relay, event->data );
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}
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free(event);
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}
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}
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/***********************************************************************
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* DOSVM_SendQueuedEvents
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*
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* As long as context instruction pointer stays unmodified,
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* process all pending events that are not blocked by currently
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* active event.
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*
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* This routine assumes that caller has already cleared TEB.vm86_pending
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* and checked that interrupts are enabled.
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*/
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void DOSVM_SendQueuedEvents( CONTEXT86 *context )
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{
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DWORD old_cs = context->SegCs;
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DWORD old_ip = context->Eip;
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EnterCriticalSection(&qcrit);
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TRACE( "Called in %s mode %s events pending (time=%ld)\n",
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ISV86(context) ? "real" : "protected",
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DOSVM_HasPendingEvents() ? "with" : "without",
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GetTickCount() );
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TRACE( "cs:ip=%04lx:%08lx, ss:sp=%04lx:%08lx\n",
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context->SegCs, context->Eip, context->SegSs, context->Esp);
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while (context->SegCs == old_cs &&
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context->Eip == old_ip &&
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DOSVM_HasPendingEvents())
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{
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DOSVM_SendOneEvent(context);
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/*
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* Event handling may have turned pending events flag on.
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* We disable it here because this prevents some
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* unnecessary calls to this function.
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*/
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NtCurrentTeb()->vm86_pending = 0;
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}
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if (!ISV86(context) && context->SegCs == old_cs && context->Eip == old_ip)
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{
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/*
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* Routine was called from DPMI but there was nothing to do.
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* We force a dummy relay call here so that we don't get a race
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* if signals are unblocked when we return to DPMI application.
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*/
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TRACE( "Called but there was nothing to do, calling NULL relay.\n" );
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DOSVM_BuildCallFrame( context, NULL, NULL );
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}
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if (DOSVM_HasPendingEvents())
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{
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/*
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* Interrupts disabled, but there are still
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* pending events, make sure that pending flag is turned on.
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*/
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TRACE( "Another event is pending, setting VIP flag.\n" );
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NtCurrentTeb()->vm86_pending |= VIP_MASK;
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}
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LeaveCriticalSection(&qcrit);
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}
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/***********************************************************************
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* QueueEvent (WINEDOS.@)
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*/
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void WINAPI DOSVM_QueueEvent( INT irq, INT priority, DOSRELAY relay, LPVOID data)
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{
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LPDOSEVENT event, cur, prev;
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BOOL old_pending;
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if (MZ_Current()) {
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event = malloc(sizeof(DOSEVENT));
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if (!event) {
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ERR("out of memory allocating event entry\n");
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return;
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}
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event->irq = irq; event->priority = priority;
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event->relay = relay; event->data = data;
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EnterCriticalSection(&qcrit);
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old_pending = DOSVM_HasPendingEvents();
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/* insert event into linked list, in order *after*
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* all earlier events of higher or equal priority */
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cur = pending_event; prev = NULL;
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while (cur && cur->priority<=priority) {
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prev = cur;
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cur = cur->next;
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}
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event->next = cur;
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if (prev) prev->next = event;
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else pending_event = event;
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if (!old_pending && DOSVM_HasPendingEvents()) {
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TRACE("new event queued, signalling (time=%ld)\n", GetTickCount());
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/* Alert VM86 thread about the new event. */
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kill(dosvm_pid,SIGUSR2);
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/* Wake up DOSVM_Wait so that it can serve pending events. */
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SetEvent(event_notifier);
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} else {
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TRACE("new event queued (time=%ld)\n", GetTickCount());
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}
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LeaveCriticalSection(&qcrit);
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} else {
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/* DOS subsystem not running */
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/* (this probably means that we're running a win16 app
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* which uses DPMI to thunk down to DOS services) */
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if (irq<0) {
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/* callback event, perform it with dummy context */
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CONTEXT86 context;
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memset(&context,0,sizeof(context));
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(*relay)(&context,data);
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} else {
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ERR("IRQ without DOS task: should not happen\n");
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}
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}
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}
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static void DOSVM_ProcessConsole(void)
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{
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INPUT_RECORD msg;
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DWORD res;
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BYTE scan, ascii;
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if (ReadConsoleInputA(GetStdHandle(STD_INPUT_HANDLE),&msg,1,&res)) {
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switch (msg.EventType) {
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case KEY_EVENT:
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scan = msg.Event.KeyEvent.wVirtualScanCode;
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ascii = msg.Event.KeyEvent.uChar.AsciiChar;
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TRACE("scan %02x, ascii %02x\n", scan, ascii);
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/* set the "break" (release) flag if key released */
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if (!msg.Event.KeyEvent.bKeyDown) scan |= 0x80;
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/* check whether extended bit is set,
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* and if so, queue the extension prefix */
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if (msg.Event.KeyEvent.dwControlKeyState & ENHANCED_KEY) {
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DOSVM_Int09SendScan(0xE0,0);
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}
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DOSVM_Int09SendScan(scan, ascii);
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break;
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case MOUSE_EVENT:
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DOSVM_Int33Console(&msg.Event.MouseEvent);
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break;
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case WINDOW_BUFFER_SIZE_EVENT:
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FIXME("unhandled WINDOW_BUFFER_SIZE_EVENT.\n");
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break;
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case MENU_EVENT:
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FIXME("unhandled MENU_EVENT.\n");
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break;
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case FOCUS_EVENT:
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FIXME("unhandled FOCUS_EVENT.\n");
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break;
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default:
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FIXME("unknown console event: %d\n", msg.EventType);
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}
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}
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}
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static void DOSVM_ProcessMessage(MSG *msg)
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{
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BYTE scan = 0;
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TRACE("got message %04x, wparam=%08x, lparam=%08lx\n",msg->message,msg->wParam,msg->lParam);
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if ((msg->message>=WM_MOUSEFIRST)&&
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(msg->message<=WM_MOUSELAST)) {
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DOSVM_Int33Message(msg->message,msg->wParam,msg->lParam);
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} else {
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switch (msg->message) {
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case WM_KEYUP:
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scan = 0x80;
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case WM_KEYDOWN:
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scan |= (msg->lParam >> 16) & 0x7f;
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/* check whether extended bit is set,
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* and if so, queue the extension prefix */
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if (msg->lParam & 0x1000000) {
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/* FIXME: some keys (function keys) have
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* extended bit set even when they shouldn't,
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* should check for them */
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DOSVM_Int09SendScan(0xE0,0);
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}
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DOSVM_Int09SendScan(scan,0);
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break;
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}
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}
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}
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/***********************************************************************
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* DOSVM_Wait
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*
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* Wait for asynchronous events. This routine temporarily enables
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* interrupts and waits until some asynchronous event has been
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* processed.
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*/
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void WINAPI DOSVM_Wait( CONTEXT86 *waitctx )
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{
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if (DOSVM_HasPendingEvents())
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{
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CONTEXT86 context = *waitctx;
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/*
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* If DOSVM_Wait is called from protected mode we emulate
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* interrupt reflection and convert context into real mode context.
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* This is actually the correct thing to do as long as DOSVM_Wait
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* is only called from those interrupt functions that DPMI reflects
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* to real mode.
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*
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* FIXME: Need to think about where to place real mode stack.
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* FIXME: If DOSVM_Wait calls are nested stack gets corrupted.
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* Can this really happen?
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*/
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if (!ISV86(&context))
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{
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context.EFlags |= 0x00020000;
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context.SegSs = 0xffff;
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context.Esp = 0;
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}
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context.EFlags |= VIF_MASK;
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context.SegCs = 0;
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context.Eip = 0;
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DOSVM_SendQueuedEvents(&context);
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if(context.SegCs || context.Eip)
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DPMI_CallRMProc( &context, NULL, 0, TRUE );
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}
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else
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{
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HANDLE objs[2];
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int objc = DOSVM_IsWin16() ? 2 : 1;
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DWORD waitret;
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objs[0] = event_notifier;
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objs[1] = GetStdHandle(STD_INPUT_HANDLE);
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waitret = MsgWaitForMultipleObjects( objc, objs, FALSE,
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INFINITE, QS_ALLINPUT );
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if (waitret == WAIT_OBJECT_0)
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{
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/*
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* New pending event has been queued, we ignore it
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* here because it will be processed on next call to
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* DOSVM_Wait.
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*/
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}
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else if (objc == 2 && waitret == WAIT_OBJECT_0 + 1)
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{
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DOSVM_ProcessConsole();
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}
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else if (waitret == WAIT_OBJECT_0 + objc)
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{
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MSG msg;
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while (PeekMessageA(&msg,0,0,0,PM_REMOVE|PM_NOYIELD))
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{
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/* got a message */
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DOSVM_ProcessMessage(&msg);
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/* we don't need a TranslateMessage here */
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DispatchMessageA(&msg);
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}
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}
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else
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{
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ERR_(module)( "dosvm wait error=%ld\n", GetLastError() );
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}
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}
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}
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DWORD WINAPI DOSVM_Loop( HANDLE hThread )
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{
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HANDLE objs[2];
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MSG msg;
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DWORD waitret;
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objs[0] = GetStdHandle(STD_INPUT_HANDLE);
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objs[1] = hThread;
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for(;;) {
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TRACE_(int)("waiting for action\n");
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waitret = MsgWaitForMultipleObjects(2, objs, FALSE, INFINITE, QS_ALLINPUT);
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if (waitret == WAIT_OBJECT_0) {
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DOSVM_ProcessConsole();
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}
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else if (waitret == WAIT_OBJECT_0 + 1) {
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DWORD rv;
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if(!GetExitCodeThread(hThread, &rv)) {
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ERR("Failed to get thread exit code!\n");
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rv = 0;
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}
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return rv;
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}
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else if (waitret == WAIT_OBJECT_0 + 2) {
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while (PeekMessageA(&msg,0,0,0,PM_REMOVE)) {
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if (msg.hwnd) {
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/* it's a window message */
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DOSVM_ProcessMessage(&msg);
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DispatchMessageA(&msg);
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} else {
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/* it's a thread message */
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switch (msg.message) {
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case WM_QUIT:
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/* stop this madness!! */
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return 0;
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case WM_USER:
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/* run passed procedure in this thread */
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/* (sort of like APC, but we signal the completion) */
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{
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DOS_SPC *spc = (DOS_SPC *)msg.lParam;
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TRACE_(int)("calling %p with arg %08lx\n", spc->proc, spc->arg);
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(spc->proc)(spc->arg);
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TRACE_(int)("done, signalling event %x\n", msg.wParam);
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SetEvent( (HANDLE)msg.wParam );
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}
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break;
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default:
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DispatchMessageA(&msg);
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}
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}
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}
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}
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else
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{
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ERR_(int)("MsgWaitForMultipleObjects returned unexpected value.\n");
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return 0;
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}
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}
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}
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static WINE_EXCEPTION_FILTER(exception_handler)
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{
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EXCEPTION_RECORD *rec = GetExceptionInformation()->ExceptionRecord;
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CONTEXT *context = GetExceptionInformation()->ContextRecord;
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int arg = rec->ExceptionInformation[0];
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BOOL ret;
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switch(rec->ExceptionCode) {
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case EXCEPTION_VM86_INTx:
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if (TRACE_ON(relay)) {
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DPRINTF("Call DOS int 0x%02x ret=%04lx:%04lx\n",
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arg, context->SegCs, context->Eip );
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DPRINTF(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx esi=%08lx edi=%08lx\n",
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context->Eax, context->Ebx, context->Ecx, context->Edx,
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context->Esi, context->Edi );
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DPRINTF(" ebp=%08lx esp=%08lx ds=%04lx es=%04lx fs=%04lx gs=%04lx flags=%08lx\n",
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context->Ebp, context->Esp, context->SegDs, context->SegEs,
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context->SegFs, context->SegGs, context->EFlags );
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}
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ret = DOSVM_EmulateInterruptRM( context, arg );
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if (TRACE_ON(relay)) {
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DPRINTF("Ret DOS int 0x%02x ret=%04lx:%04lx\n",
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arg, context->SegCs, context->Eip );
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DPRINTF(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx esi=%08lx edi=%08lx\n",
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context->Eax, context->Ebx, context->Ecx, context->Edx,
|
|
context->Esi, context->Edi );
|
|
DPRINTF(" ebp=%08lx esp=%08lx ds=%04lx es=%04lx fs=%04lx gs=%04lx flags=%08lx\n",
|
|
context->Ebp, context->Esp, context->SegDs, context->SegEs,
|
|
context->SegFs, context->SegGs, context->EFlags );
|
|
}
|
|
return ret ? EXCEPTION_CONTINUE_EXECUTION : EXCEPTION_EXECUTE_HANDLER;
|
|
|
|
case EXCEPTION_VM86_STI:
|
|
/* case EXCEPTION_VM86_PICRETURN: */
|
|
if (!ISV86(context))
|
|
ERR( "Protected mode STI caught by real mode handler!\n" );
|
|
|
|
context->EFlags |= VIF_MASK;
|
|
context->EFlags &= ~VIP_MASK;
|
|
DOSVM_SendQueuedEvents(context);
|
|
return EXCEPTION_CONTINUE_EXECUTION;
|
|
}
|
|
return EXCEPTION_CONTINUE_SEARCH;
|
|
}
|
|
|
|
int WINAPI DOSVM_Enter( CONTEXT86 *context )
|
|
{
|
|
__TRY
|
|
{
|
|
__wine_enter_vm86( context );
|
|
TRACE_(module)( "vm86 returned: %s\n", strerror(errno) );
|
|
}
|
|
__EXCEPT(exception_handler)
|
|
{
|
|
TRACE_(module)( "leaving vm86 mode\n" );
|
|
}
|
|
__ENDTRY
|
|
|
|
return 0;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* OutPIC (WINEDOS.@)
|
|
*/
|
|
void WINAPI DOSVM_PIC_ioport_out( WORD port, BYTE val)
|
|
{
|
|
LPDOSEVENT event;
|
|
|
|
if ((port==0x20) && (val==0x20)) {
|
|
EnterCriticalSection(&qcrit);
|
|
if (current_event) {
|
|
/* EOI (End Of Interrupt) */
|
|
TRACE("received EOI for current IRQ, clearing\n");
|
|
event = current_event;
|
|
current_event = event->next;
|
|
if (event->relay)
|
|
(*event->relay)(NULL,event->data);
|
|
free(event);
|
|
|
|
if (DOSVM_HasPendingEvents()) {
|
|
/* another event is pending, which we should probably
|
|
* be able to process now */
|
|
TRACE("another event pending, setting flag\n");
|
|
NtCurrentTeb()->vm86_pending |= VIP_MASK;
|
|
}
|
|
} else {
|
|
WARN("EOI without active IRQ\n");
|
|
}
|
|
LeaveCriticalSection(&qcrit);
|
|
} else {
|
|
FIXME("unrecognized PIC command %02x\n",val);
|
|
}
|
|
}
|
|
|
|
#else /* !MZ_SUPPORTED */
|
|
|
|
/***********************************************************************
|
|
* Enter (WINEDOS.@)
|
|
*/
|
|
INT WINAPI DOSVM_Enter( CONTEXT86 *context )
|
|
{
|
|
ERR_(module)("DOS realmode not supported on this architecture!\n");
|
|
return -1;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* Wait (WINEDOS.@)
|
|
*/
|
|
void WINAPI DOSVM_Wait( CONTEXT86 *waitctx ) { }
|
|
|
|
/***********************************************************************
|
|
* OutPIC (WINEDOS.@)
|
|
*/
|
|
void WINAPI DOSVM_PIC_ioport_out( WORD port, BYTE val) {}
|
|
|
|
/***********************************************************************
|
|
* QueueEvent (WINEDOS.@)
|
|
*/
|
|
void WINAPI DOSVM_QueueEvent( INT irq, INT priority, DOSRELAY relay, LPVOID data)
|
|
{
|
|
if (irq<0) {
|
|
/* callback event, perform it with dummy context */
|
|
CONTEXT86 context;
|
|
memset(&context,0,sizeof(context));
|
|
(*relay)(&context,data);
|
|
} else {
|
|
ERR("IRQ without DOS task: should not happen\n");
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
/**********************************************************************
|
|
* DOSVM_AcknowledgeIRQ
|
|
*
|
|
* This routine should be called by all internal IRQ handlers.
|
|
*/
|
|
void WINAPI DOSVM_AcknowledgeIRQ( CONTEXT86 *context )
|
|
{
|
|
/*
|
|
* Send EOI to PIC.
|
|
*/
|
|
DOSVM_PIC_ioport_out( 0x20, 0x20 );
|
|
|
|
/*
|
|
* Protected mode IRQ handlers are supposed
|
|
* to turn VIF flag on before they return.
|
|
*/
|
|
if (!ISV86(context))
|
|
NtCurrentTeb()->dpmi_vif = 1;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* DllMain (DOSVM.Init)
|
|
*/
|
|
BOOL WINAPI DllMain( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved )
|
|
{
|
|
TRACE_(module)("(%p,%ld,%p)\n", hinstDLL, fdwReason, lpvReserved);
|
|
|
|
if (fdwReason == DLL_PROCESS_ATTACH)
|
|
{
|
|
DOSVM_InitSegments();
|
|
|
|
#ifdef MZ_SUPPORTED
|
|
event_notifier = CreateEventA(NULL, FALSE, FALSE, NULL);
|
|
if(!event_notifier)
|
|
ERR("Failed to create event object!\n");
|
|
#endif
|
|
|
|
}
|
|
return TRUE;
|
|
}
|