4 * Copyright 1998 Ove Kåven
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.
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.
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
20 * Note: This code hasn't been completely cleaned up yet.
34 #ifdef HAVE_SYS_TIME_H
35 # include <sys/time.h>
37 #include <sys/types.h>
39 #include "wine/winbase16.h"
40 #include "wine/exception.h"
53 #include "stackframe.h"
54 #include "wine/debug.h"
57 WINE_DEFAULT_DEBUG_CHANNEL(int);
58 WINE_DECLARE_DEBUG_CHANNEL(module);
59 WINE_DECLARE_DEBUG_CHANNEL(relay);
62 WORD DOSVM_retval = 0;
66 #ifdef HAVE_SYS_VM86_H
67 # include <sys/vm86.h>
69 #ifdef HAVE_SYS_MMAN_H
70 # include <sys/mman.h>
73 #define IF_CLR(ctx) ((ctx)->EFlags &= ~VIF_MASK)
74 #define IF_SET(ctx) ((ctx)->EFlags |= VIF_MASK)
75 #define IF_ENABLED(ctx) ((ctx)->EFlags & VIF_MASK)
76 #define SET_PEND(ctx) ((ctx)->EFlags |= VIP_MASK)
77 #define CLR_PEND(ctx) ((ctx)->EFlags &= ~VIP_MASK)
78 #define IS_PEND(ctx) ((ctx)->EFlags & VIP_MASK)
82 typedef struct _DOSEVENT {
86 struct _DOSEVENT *next;
87 } DOSEVENT, *LPDOSEVENT;
89 static CRITICAL_SECTION qcrit = CRITICAL_SECTION_INIT("DOSVM");
90 static struct _DOSEVENT *pending_event, *current_event;
92 static HANDLE event_notifier;
94 #define SHOULD_PEND(x) \
95 (x && ((!current_event) || (x->priority < current_event->priority)))
97 static void DOSVM_SendQueuedEvent(CONTEXT86 *context)
99 LPDOSEVENT event = pending_event;
101 if (SHOULD_PEND(event)) {
102 /* remove from "pending" list */
103 pending_event = event->next;
106 /* it's an IRQ, move it to "current" list */
107 event->next = current_event;
108 current_event = event;
109 TRACE("dispatching IRQ %d\n",event->irq);
110 /* note that if DOSVM_SimulateInt calls an internal interrupt directly,
111 * current_event might be cleared (and event freed) in this very call! */
112 DOSVM_HardwareInterruptRM( context, (event->irq < 8) ?
113 (event->irq + 8) : (event->irq - 8 + 0x70) );
116 TRACE("dispatching callback event\n");
117 (*event->relay)(context,event->data);
121 if (!SHOULD_PEND(pending_event)) {
122 TRACE("clearing Pending flag\n");
127 static void DOSVM_SendQueuedEvents(CONTEXT86 *context)
129 /* we will send all queued events as long as interrupts are enabled,
130 * but IRQ events will disable interrupts again */
131 while (IS_PEND(context) && IF_ENABLED(context))
132 DOSVM_SendQueuedEvent(context);
135 /***********************************************************************
136 * QueueEvent (WINEDOS.@)
138 void WINAPI DOSVM_QueueEvent( INT irq, INT priority, DOSRELAY relay, LPVOID data)
140 LPDOSEVENT event, cur, prev;
143 event = malloc(sizeof(DOSEVENT));
145 ERR("out of memory allocating event entry\n");
148 event->irq = irq; event->priority = priority;
149 event->relay = relay; event->data = data;
151 EnterCriticalSection(&qcrit);
152 /* insert event into linked list, in order *after*
153 * all earlier events of higher or equal priority */
154 cur = pending_event; prev = NULL;
155 while (cur && cur->priority<=priority) {
160 if (prev) prev->next = event;
161 else pending_event = event;
163 /* alert the vm86 about the new event */
165 TRACE("new event queued, signalling (time=%ld)\n", GetTickCount());
166 kill(dosvm_pid,SIGUSR2);
169 TRACE("new event queued (time=%ld)\n", GetTickCount());
172 /* Wake up DOSVM_Wait so that it can serve pending events. */
173 SetEvent(event_notifier);
175 LeaveCriticalSection(&qcrit);
177 /* DOS subsystem not running */
178 /* (this probably means that we're running a win16 app
179 * which uses DPMI to thunk down to DOS services) */
181 /* callback event, perform it with dummy context */
183 memset(&context,0,sizeof(context));
184 (*relay)(&context,data);
186 ERR("IRQ without DOS task: should not happen\n");
191 static void DOSVM_ProcessConsole(void)
197 if (ReadConsoleInputA(GetStdHandle(STD_INPUT_HANDLE),&msg,1,&res)) {
198 switch (msg.EventType) {
200 scan = msg.Event.KeyEvent.wVirtualScanCode;
201 ascii = msg.Event.KeyEvent.uChar.AsciiChar;
202 TRACE("scan %02x, ascii %02x\n", scan, ascii);
204 /* set the "break" (release) flag if key released */
205 if (!msg.Event.KeyEvent.bKeyDown) scan |= 0x80;
207 /* check whether extended bit is set,
208 * and if so, queue the extension prefix */
209 if (msg.Event.KeyEvent.dwControlKeyState & ENHANCED_KEY) {
210 DOSVM_Int09SendScan(0xE0,0);
212 DOSVM_Int09SendScan(scan, ascii);
215 DOSVM_Int33Console(&msg.Event.MouseEvent);
217 case WINDOW_BUFFER_SIZE_EVENT:
218 FIXME("unhandled WINDOW_BUFFER_SIZE_EVENT.\n");
221 FIXME("unhandled MENU_EVENT.\n");
224 FIXME("unhandled FOCUS_EVENT.\n");
227 FIXME("unknown console event: %d\n", msg.EventType);
232 static void DOSVM_ProcessMessage(MSG *msg)
236 TRACE("got message %04x, wparam=%08x, lparam=%08lx\n",msg->message,msg->wParam,msg->lParam);
237 if ((msg->message>=WM_MOUSEFIRST)&&
238 (msg->message<=WM_MOUSELAST)) {
239 DOSVM_Int33Message(msg->message,msg->wParam,msg->lParam);
241 switch (msg->message) {
245 scan |= (msg->lParam >> 16) & 0x7f;
247 /* check whether extended bit is set,
248 * and if so, queue the extension prefix */
249 if (msg->lParam & 0x1000000) {
250 /* FIXME: some keys (function keys) have
251 * extended bit set even when they shouldn't,
252 * should check for them */
253 DOSVM_Int09SendScan(0xE0,0);
255 DOSVM_Int09SendScan(scan,0);
262 /***********************************************************************
265 * Wait for asynchronous events. This routine temporarily enables
266 * interrupts and waits until some asynchronous event has been
269 void WINAPI DOSVM_Wait( CONTEXT86 *waitctx )
271 if (SHOULD_PEND(pending_event))
274 * FIXME: This does not work in protected mode DOS programs.
275 * FIXME: If we have pending IRQ which has 16-bit handler,
276 * DOSVM_SendQueuedEvents may stuck in which case application
277 * deadlocks. This is why keyboard events must have top
278 * priority (default timer IRQ handler is 16-bit code).
279 * FIXME: Critical section locking is broken.
281 CONTEXT86 context = *waitctx;
284 DOSVM_SendQueuedEvents(&context);
289 int objc = DOSVM_IsWin16() ? 2 : 1;
292 objs[0] = event_notifier;
293 objs[1] = GetStdHandle(STD_INPUT_HANDLE);
295 waitret = MsgWaitForMultipleObjects( objc, objs, FALSE,
296 INFINITE, QS_ALLINPUT );
298 if (waitret == WAIT_OBJECT_0)
301 * New pending event has been queued, we ignore it
302 * here because it will be processed on next call to
306 else if (objc == 2 && waitret == WAIT_OBJECT_0 + 1)
308 DOSVM_ProcessConsole();
310 else if (waitret == WAIT_OBJECT_0 + objc)
313 while (PeekMessageA(&msg,0,0,0,PM_REMOVE|PM_NOYIELD))
316 DOSVM_ProcessMessage(&msg);
317 /* we don't need a TranslateMessage here */
318 DispatchMessageA(&msg);
323 ERR_(module)( "dosvm wait error=%ld\n", GetLastError() );
329 DWORD WINAPI DOSVM_Loop( HANDLE hThread )
335 objs[0] = GetStdHandle(STD_INPUT_HANDLE);
339 TRACE_(int)("waiting for action\n");
340 waitret = MsgWaitForMultipleObjects(2, objs, FALSE, INFINITE, QS_ALLINPUT);
341 if (waitret == WAIT_OBJECT_0) {
342 DOSVM_ProcessConsole();
344 else if (waitret == WAIT_OBJECT_0 + 1) {
346 if(!GetExitCodeThread(hThread, &rv)) {
347 ERR("Failed to get thread exit code!\n");
352 else if (waitret == WAIT_OBJECT_0 + 2) {
353 while (PeekMessageA(&msg,0,0,0,PM_REMOVE)) {
355 /* it's a window message */
356 DOSVM_ProcessMessage(&msg);
357 DispatchMessageA(&msg);
359 /* it's a thread message */
360 switch (msg.message) {
362 /* stop this madness!! */
365 /* run passed procedure in this thread */
366 /* (sort of like APC, but we signal the completion) */
368 DOS_SPC *spc = (DOS_SPC *)msg.lParam;
369 TRACE_(int)("calling %p with arg %08lx\n", spc->proc, spc->arg);
370 (spc->proc)(spc->arg);
371 TRACE_(int)("done, signalling event %x\n", msg.wParam);
372 SetEvent( (HANDLE)msg.wParam );
381 ERR_(int)("MsgWaitForMultipleObjects returned unexpected value.\n");
387 static WINE_EXCEPTION_FILTER(exception_handler)
389 EXCEPTION_RECORD *rec = GetExceptionInformation()->ExceptionRecord;
390 CONTEXT *context = GetExceptionInformation()->ContextRecord;
391 int arg = rec->ExceptionInformation[0];
394 switch(rec->ExceptionCode) {
395 case EXCEPTION_VM86_INTx:
396 if (TRACE_ON(relay)) {
397 DPRINTF("Call DOS int 0x%02x ret=%04lx:%04lx\n",
398 arg, context->SegCs, context->Eip );
399 DPRINTF(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx esi=%08lx edi=%08lx\n",
400 context->Eax, context->Ebx, context->Ecx, context->Edx,
401 context->Esi, context->Edi );
402 DPRINTF(" ebp=%08lx esp=%08lx ds=%04lx es=%04lx fs=%04lx gs=%04lx flags=%08lx\n",
403 context->Ebp, context->Esp, context->SegDs, context->SegEs,
404 context->SegFs, context->SegGs, context->EFlags );
406 ret = DOSVM_EmulateInterruptRM( context, arg );
407 if (TRACE_ON(relay)) {
408 DPRINTF("Ret DOS int 0x%02x ret=%04lx:%04lx\n",
409 arg, context->SegCs, context->Eip );
410 DPRINTF(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx esi=%08lx edi=%08lx\n",
411 context->Eax, context->Ebx, context->Ecx, context->Edx,
412 context->Esi, context->Edi );
413 DPRINTF(" ebp=%08lx esp=%08lx ds=%04lx es=%04lx fs=%04lx gs=%04lx flags=%08lx\n",
414 context->Ebp, context->Esp, context->SegDs, context->SegEs,
415 context->SegFs, context->SegGs, context->EFlags );
417 return ret ? EXCEPTION_CONTINUE_EXECUTION : EXCEPTION_EXECUTE_HANDLER;
419 case EXCEPTION_VM86_STI:
420 /* case EXCEPTION_VM86_PICRETURN: */
422 EnterCriticalSection(&qcrit);
424 while (NtCurrentTeb()->alarms) {
425 DOSVM_QueueEvent(0,DOS_PRIORITY_REALTIME,NULL,NULL);
426 /* hmm, instead of relying on this signal counter, we should
427 * probably check how many ticks have *really* passed, probably using
428 * QueryPerformanceCounter() or something like that */
429 InterlockedDecrement(&(NtCurrentTeb()->alarms));
431 TRACE_(int)("context=%p\n", context);
432 TRACE_(int)("cs:ip=%04lx:%04lx, ss:sp=%04lx:%04lx\n", context->SegCs, context->Eip, context->SegSs, context->Esp);
433 if (!ISV86(context)) {
434 ERR_(int)("@#&*%%, winedos signal handling is *still* messed up\n");
436 TRACE_(int)("DOS task enabled interrupts %s events pending, sending events (time=%ld)\n", IS_PEND(context)?"with":"without", GetTickCount());
437 DOSVM_SendQueuedEvents(context);
439 LeaveCriticalSection(&qcrit);
440 return EXCEPTION_CONTINUE_EXECUTION;
442 return EXCEPTION_CONTINUE_SEARCH;
445 int WINAPI DOSVM_Enter( CONTEXT86 *context )
449 __wine_enter_vm86( context );
450 TRACE_(module)( "vm86 returned: %s\n", strerror(errno) );
452 __EXCEPT(exception_handler)
454 TRACE_(module)( "leaving vm86 mode\n" );
461 /***********************************************************************
464 void WINAPI DOSVM_PIC_ioport_out( WORD port, BYTE val)
468 if ((port==0x20) && (val==0x20)) {
469 EnterCriticalSection(&qcrit);
471 /* EOI (End Of Interrupt) */
472 TRACE("received EOI for current IRQ, clearing\n");
473 event = current_event;
474 current_event = event->next;
476 (*event->relay)(NULL,event->data);
480 /* another event is pending, which we should probably
481 * be able to process now */
482 TRACE("another event pending, setting flag\n");
483 NtCurrentTeb()->vm86_pending |= VIP_MASK;
486 WARN("EOI without active IRQ\n");
488 LeaveCriticalSection(&qcrit);
490 FIXME("unrecognized PIC command %02x\n",val);
494 /***********************************************************************
495 * SetTimer (WINEDOS.@)
497 void WINAPI DOSVM_SetTimer( UINT ticks )
499 struct itimerval tim;
502 /* the PC clocks ticks at 1193180 Hz */
503 tim.it_interval.tv_sec=0;
504 tim.it_interval.tv_usec=MulDiv(ticks,1000000,1193180);
506 if (!tim.it_interval.tv_usec) tim.it_interval.tv_usec=1;
507 /* first tick value */
508 tim.it_value = tim.it_interval;
509 TRACE_(int)("setting timer tick delay to %ld us\n", tim.it_interval.tv_usec);
510 setitimer(ITIMER_REAL, &tim, NULL);
514 /***********************************************************************
515 * GetTimer (WINEDOS.@)
517 UINT WINAPI DOSVM_GetTimer( void )
519 struct itimerval tim;
522 getitimer(ITIMER_REAL, &tim);
523 return MulDiv(tim.it_value.tv_usec,1193180,1000000);
528 #else /* !MZ_SUPPORTED */
530 /***********************************************************************
533 INT WINAPI DOSVM_Enter( CONTEXT86 *context )
535 ERR_(module)("DOS realmode not supported on this architecture!\n");
539 /***********************************************************************
542 void WINAPI DOSVM_Wait( CONTEXT86 *waitctx ) { }
544 /***********************************************************************
547 void WINAPI DOSVM_PIC_ioport_out( WORD port, BYTE val) {}
549 /***********************************************************************
550 * SetTimer (WINEDOS.@)
552 void WINAPI DOSVM_SetTimer( UINT ticks ) {}
554 /***********************************************************************
555 * GetTimer (WINEDOS.@)
557 UINT WINAPI DOSVM_GetTimer( void ) { return 0; }
559 /***********************************************************************
560 * QueueEvent (WINEDOS.@)
562 void WINAPI DOSVM_QueueEvent( INT irq, INT priority, DOSRELAY relay, LPVOID data)
565 /* callback event, perform it with dummy context */
567 memset(&context,0,sizeof(context));
568 (*relay)(&context,data);
570 ERR("IRQ without DOS task: should not happen\n");
577 /**********************************************************************
578 * DllMain (DOSVM.Init)
580 BOOL WINAPI DllMain( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved )
582 TRACE_(module)("(%p,%ld,%p)\n", hinstDLL, fdwReason, lpvReserved);
584 if (fdwReason == DLL_PROCESS_ATTACH)
586 DOSVM_InitSegments();
589 event_notifier = CreateEventA(NULL, FALSE, FALSE, NULL);
591 ERR("Failed to create event object!\n");