static LONG WINAPI exception_handler(EXCEPTION_POINTERS *eptr)
{
EXCEPTION_RECORD *rec = eptr->ExceptionRecord;
CONTEXT *context = eptr->ContextRecord;
int arg = rec->ExceptionInformation[0];
BOOL ret;
switch(rec->ExceptionCode) {
case EXCEPTION_VM86_INTx:
TRACE_(relay)("Call DOS int 0x%02x ret=%04x:%04x\n"
" eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n"
" ebp=%08x esp=%08x ds=%04x es=%04x fs=%04x gs=%04x flags=%08x\n",
arg, context->SegCs, context->Eip,
context->Eax, context->Ebx, context->Ecx, context->Edx, context->Esi, context->Edi,
context->Ebp, context->Esp, context->SegDs, context->SegEs, context->SegFs, context->SegGs,
context->EFlags );
ret = DOSVM_EmulateInterruptRM( context, arg );
TRACE_(relay)("Ret DOS int 0x%02x ret=%04x:%04x\n"
" eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n"
" ebp=%08x esp=%08x ds=%04x es=%04x fs=%04x gs=%04x flags=%08x\n",
arg, context->SegCs, context->Eip,
context->Eax, context->Ebx, context->Ecx, context->Edx, context->Esi, context->Edi,
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" );
DOSVM_SendQueuedEvents(context);
return EXCEPTION_CONTINUE_EXECUTION;
case EXCEPTION_SINGLE_STEP:
ret = DOSVM_EmulateInterruptRM( context, 1 );
return ret ? EXCEPTION_CONTINUE_EXECUTION : EXCEPTION_EXECUTE_HANDLER;
case EXCEPTION_BREAKPOINT:
ret = DOSVM_EmulateInterruptRM( context, 3 );
return ret ? EXCEPTION_CONTINUE_EXECUTION : EXCEPTION_EXECUTE_HANDLER;
}
return EXCEPTION_CONTINUE_SEARCH;
}
/**********************************************************************
* dpmi_exception_handler
*
* Handle EXCEPTION_VM86_STI exceptions generated
* when there are pending asynchronous events.
*/
static LONG WINAPI dpmi_exception_handler(EXCEPTION_POINTERS *eptr)
{
EXCEPTION_RECORD *rec = eptr->ExceptionRecord;
CONTEXT *context = eptr->ContextRecord;
if (rec->ExceptionCode == EXCEPTION_VM86_STI)
{
if (ISV86(context))
ERR( "Real mode STI caught by protected mode handler!\n" );
DOSVM_SendQueuedEvents(context);
return EXCEPTION_CONTINUE_EXECUTION;
}
else if (rec->ExceptionCode == EXCEPTION_VM86_INTx)
{
if (ISV86(context))
ERR( "Real mode INTx caught by protected mode handler!\n" );
DPMI_retval = (BYTE)rec->ExceptionInformation[0];
return EXCEPTION_EXECUTE_HANDLER;
}
return EXCEPTION_CONTINUE_SEARCH;
}
/**********************************************************************
* dpmi_exception_handler
*
* Handle EXCEPTION_VM86_STI exceptions generated
* when there are pending asynchronous events.
*/
static WINE_EXCEPTION_FILTER(dpmi_exception_handler)
{
#ifdef __i386__
EXCEPTION_RECORD *rec = GetExceptionInformation()->ExceptionRecord;
CONTEXT *context = GetExceptionInformation()->ContextRecord;
if (rec->ExceptionCode == EXCEPTION_VM86_STI)
{
if (ISV86(context))
ERR( "Real mode STI caught by protected mode handler!\n" );
DOSVM_SendQueuedEvents(context);
return EXCEPTION_CONTINUE_EXECUTION;
}
else if (rec->ExceptionCode == EXCEPTION_VM86_INTx)
{
if (ISV86(context))
ERR( "Real mode INTx caught by protected mode handler!\n" );
DPMI_retval = (BYTE)rec->ExceptionInformation[0];
return EXCEPTION_EXECUTE_HANDLER;
}
#endif
return EXCEPTION_CONTINUE_SEARCH;
}
/***********************************************************************
* DOSVM_Wait
*
* Wait for asynchronous events. This routine temporarily enables
* interrupts and waits until some asynchronous event has been
* processed.
*/
void WINAPI DOSVM_Wait( CONTEXT86 *waitctx )
{
if (DOSVM_HasPendingEvents())
{
CONTEXT86 context = *waitctx;
/*
* If DOSVM_Wait is called from protected mode we emulate
* interrupt reflection and convert context into real mode context.
* This is actually the correct thing to do as long as DOSVM_Wait
* is only called from those interrupt functions that DPMI reflects
* to real mode.
*
* FIXME: Need to think about where to place real mode stack.
* FIXME: If DOSVM_Wait calls are nested stack gets corrupted.
* Can this really happen?
*/
if (!ISV86(&context))
{
context.EFlags |= V86_FLAG;
context.SegSs = 0xffff;
context.Esp = 0;
}
context.EFlags |= VIF_MASK;
context.SegCs = 0;
context.Eip = 0;
DOSVM_SendQueuedEvents(&context);
if(context.SegCs || context.Eip)
DPMI_CallRMProc( &context, NULL, 0, TRUE );
}
else
{
HANDLE objs[2];
int objc = DOSVM_IsWin16() ? 2 : 1;
DWORD waitret;
objs[0] = event_notifier;
objs[1] = GetStdHandle(STD_INPUT_HANDLE);
waitret = MsgWaitForMultipleObjects( objc, objs, FALSE,
INFINITE, QS_ALLINPUT );
if (waitret == WAIT_OBJECT_0)
{
/*
* New pending event has been queued, we ignore it
* here because it will be processed on next call to
* DOSVM_Wait.
*/
}
else if (objc == 2 && waitret == WAIT_OBJECT_0 + 1)
{
DOSVM_ProcessConsole();
}
else if (waitret == WAIT_OBJECT_0 + objc)
{
MSG msg;
while (PeekMessageA(&msg,0,0,0,PM_REMOVE|PM_NOYIELD))
{
/* got a message */
DOSVM_ProcessMessage(&msg);
/* we don't need a TranslateMessage here */
DispatchMessageA(&msg);
}
}
else
{
ERR_(module)( "dosvm wait error=%d\n", GetLastError() );
}
}
}
