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;
93 static CONTEXT86 *current_context;
95 #define SHOULD_PEND(x) \
96 (x && ((!current_event) || (x->priority < current_event->priority)))
98 static void DOSVM_SendQueuedEvent(CONTEXT86 *context)
100 LPDOSEVENT event = pending_event;
102 if (SHOULD_PEND(event)) {
103 /* remove from "pending" list */
104 pending_event = event->next;
107 /* it's an IRQ, move it to "current" list */
108 event->next = current_event;
109 current_event = event;
110 TRACE("dispatching IRQ %d\n",event->irq);
111 /* note that if DOSVM_SimulateInt calls an internal interrupt directly,
112 * current_event might be cleared (and event freed) in this very call! */
113 DOSVM_HardwareInterruptRM( context, (event->irq < 8) ?
114 (event->irq + 8) : (event->irq - 8 + 0x70) );
117 TRACE("dispatching callback event\n");
118 (*event->relay)(context,event->data);
122 if (!SHOULD_PEND(pending_event)) {
123 TRACE("clearing Pending flag\n");
128 static void DOSVM_SendQueuedEvents(CONTEXT86 *context)
130 /* we will send all queued events as long as interrupts are enabled,
131 * but IRQ events will disable interrupts again */
132 while (IS_PEND(context) && IF_ENABLED(context))
133 DOSVM_SendQueuedEvent(context);
136 /***********************************************************************
137 * QueueEvent (WINEDOS.@)
139 void WINAPI DOSVM_QueueEvent( INT irq, INT priority, DOSRELAY relay, LPVOID data)
141 LPDOSEVENT event, cur, prev;
143 if (current_context) {
144 event = malloc(sizeof(DOSEVENT));
146 ERR("out of memory allocating event entry\n");
149 event->irq = irq; event->priority = priority;
150 event->relay = relay; event->data = data;
152 EnterCriticalSection(&qcrit);
153 /* insert event into linked list, in order *after*
154 * all earlier events of higher or equal priority */
155 cur = pending_event; prev = NULL;
156 while (cur && cur->priority<=priority) {
161 if (prev) prev->next = event;
162 else pending_event = event;
164 /* alert the vm86 about the new event */
166 TRACE("new event queued, signalling (time=%ld)\n", GetTickCount());
167 kill(dosvm_pid,SIGUSR2);
170 TRACE("new event queued (time=%ld)\n", GetTickCount());
173 /* Wake up DOSVM_Wait so that it can serve pending events. */
174 SetEvent(event_notifier);
176 LeaveCriticalSection(&qcrit);
178 /* DOS subsystem not running */
179 /* (this probably means that we're running a win16 app
180 * which uses DPMI to thunk down to DOS services) */
182 /* callback event, perform it with dummy context */
184 memset(&context,0,sizeof(context));
185 (*relay)(&context,data);
187 ERR("IRQ without DOS task: should not happen\n");
192 static void DOSVM_ProcessConsole(void)
198 if (ReadConsoleInputA(GetStdHandle(STD_INPUT_HANDLE),&msg,1,&res)) {
199 switch (msg.EventType) {
201 scan = msg.Event.KeyEvent.wVirtualScanCode;
202 ascii = msg.Event.KeyEvent.uChar.AsciiChar;
203 TRACE("scan %02x, ascii %02x\n", scan, ascii);
205 /* set the "break" (release) flag if key released */
206 if (!msg.Event.KeyEvent.bKeyDown) scan |= 0x80;
208 /* check whether extended bit is set,
209 * and if so, queue the extension prefix */
210 if (msg.Event.KeyEvent.dwControlKeyState & ENHANCED_KEY) {
211 DOSVM_Int09SendScan(0xE0,0);
213 DOSVM_Int09SendScan(scan, ascii);
216 DOSVM_Int33Console(&msg.Event.MouseEvent);
218 case WINDOW_BUFFER_SIZE_EVENT:
219 FIXME("unhandled WINDOW_BUFFER_SIZE_EVENT.\n");
222 FIXME("unhandled MENU_EVENT.\n");
225 FIXME("unhandled FOCUS_EVENT.\n");
228 FIXME("unknown console event: %d\n", msg.EventType);
233 static void DOSVM_ProcessMessage(MSG *msg)
237 TRACE("got message %04x, wparam=%08x, lparam=%08lx\n",msg->message,msg->wParam,msg->lParam);
238 if ((msg->message>=WM_MOUSEFIRST)&&
239 (msg->message<=WM_MOUSELAST)) {
240 DOSVM_Int33Message(msg->message,msg->wParam,msg->lParam);
242 switch (msg->message) {
246 scan |= (msg->lParam >> 16) & 0x7f;
248 /* check whether extended bit is set,
249 * and if so, queue the extension prefix */
250 if (msg->lParam & 0x1000000) {
251 /* FIXME: some keys (function keys) have
252 * extended bit set even when they shouldn't,
253 * should check for them */
254 DOSVM_Int09SendScan(0xE0,0);
256 DOSVM_Int09SendScan(scan,0);
262 /***********************************************************************
265 void WINAPI DOSVM_Wait( INT read_pipe, HANDLE hObject )
271 BOOL got_msg = FALSE;
273 objs[0]=GetStdHandle(STD_INPUT_HANDLE);
274 objs[1]=event_notifier;
278 /* check for messages (waste time before the response check below) */
281 while (PeekMessageA(&msg,0,0,0,PM_REMOVE|PM_NOYIELD)) {
283 DOSVM_ProcessMessage(&msg);
284 /* we don't need a TranslateMessage here */
285 DispatchMessageA(&msg);
291 /* check for console input */
294 if (PeekConsoleInputA(objs[0],&msg,1,&num) && num) {
295 DOSVM_ProcessConsole();
299 if (read_pipe == -1) {
300 /* dispatch pending events */
301 if (SHOULD_PEND(pending_event)) {
302 CONTEXT86 context = *current_context;
305 DOSVM_SendQueuedEvents(&context);
311 struct timeval timeout={0,0};
312 /* quick check for response from dosmod
313 * (faster than doing the full blocking wait, if data already available) */
314 FD_ZERO(&readfds); FD_SET(read_pipe,&readfds);
315 if (select(read_pipe+1,&readfds,NULL,NULL,&timeout)>0)
318 /* nothing yet, block while waiting for something to do */
319 if (MsgWaitForMultipleObjects)
320 waitret = MsgWaitForMultipleObjects(objc,objs,FALSE,INFINITE,QS_ALLINPUT);
322 waitret = WaitForMultipleObjects(objc,objs,FALSE,INFINITE);
324 if (waitret==(DWORD)-1) {
325 ERR_(module)("dosvm wait error=%ld\n",GetLastError());
327 if ((read_pipe != -1) && hObject) {
328 if (waitret==(WAIT_OBJECT_0+2)) break;
330 if (waitret==WAIT_OBJECT_0)
331 goto chk_console_input;
335 DWORD WINAPI DOSVM_Loop( HANDLE hThread )
341 objs[0] = GetStdHandle(STD_INPUT_HANDLE);
345 TRACE_(int)("waiting for action\n");
346 waitret = MsgWaitForMultipleObjects(2, objs, FALSE, INFINITE, QS_ALLINPUT);
347 if (waitret == WAIT_OBJECT_0) {
348 DOSVM_ProcessConsole();
350 else if (waitret == WAIT_OBJECT_0 + 1) {
352 if(!GetExitCodeThread(hThread, &rv)) {
353 ERR("Failed to get thread exit code!\n");
358 else if (waitret == WAIT_OBJECT_0 + 2) {
359 while (PeekMessageA(&msg,0,0,0,PM_REMOVE)) {
361 /* it's a window message */
362 DOSVM_ProcessMessage(&msg);
363 DispatchMessageA(&msg);
365 /* it's a thread message */
366 switch (msg.message) {
368 /* stop this madness!! */
371 /* run passed procedure in this thread */
372 /* (sort of like APC, but we signal the completion) */
374 DOS_SPC *spc = (DOS_SPC *)msg.lParam;
375 TRACE_(int)("calling %p with arg %08lx\n", spc->proc, spc->arg);
376 (spc->proc)(spc->arg);
377 TRACE_(int)("done, signalling event %x\n", msg.wParam);
378 SetEvent( (HANDLE)msg.wParam );
387 ERR_(int)("MsgWaitForMultipleObjects returned unexpected value.\n");
393 static WINE_EXCEPTION_FILTER(exception_handler)
395 EXCEPTION_RECORD *rec = GetExceptionInformation()->ExceptionRecord;
396 CONTEXT *context = GetExceptionInformation()->ContextRecord;
397 int arg = rec->ExceptionInformation[0];
400 switch(rec->ExceptionCode) {
401 case EXCEPTION_VM86_INTx:
402 if (TRACE_ON(relay)) {
403 DPRINTF("Call DOS int 0x%02x ret=%04lx:%04lx\n",
404 arg, context->SegCs, context->Eip );
405 DPRINTF(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx esi=%08lx edi=%08lx\n",
406 context->Eax, context->Ebx, context->Ecx, context->Edx,
407 context->Esi, context->Edi );
408 DPRINTF(" ebp=%08lx esp=%08lx ds=%04lx es=%04lx fs=%04lx gs=%04lx flags=%08lx\n",
409 context->Ebp, context->Esp, context->SegDs, context->SegEs,
410 context->SegFs, context->SegGs, context->EFlags );
412 ret = DOSVM_EmulateInterruptRM( context, arg );
413 if (TRACE_ON(relay)) {
414 DPRINTF("Ret DOS int 0x%02x ret=%04lx:%04lx\n",
415 arg, context->SegCs, context->Eip );
416 DPRINTF(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx esi=%08lx edi=%08lx\n",
417 context->Eax, context->Ebx, context->Ecx, context->Edx,
418 context->Esi, context->Edi );
419 DPRINTF(" ebp=%08lx esp=%08lx ds=%04lx es=%04lx fs=%04lx gs=%04lx flags=%08lx\n",
420 context->Ebp, context->Esp, context->SegDs, context->SegEs,
421 context->SegFs, context->SegGs, context->EFlags );
423 return ret ? EXCEPTION_CONTINUE_EXECUTION : EXCEPTION_EXECUTE_HANDLER;
425 case EXCEPTION_VM86_STI:
426 /* case EXCEPTION_VM86_PICRETURN: */
428 EnterCriticalSection(&qcrit);
430 while (NtCurrentTeb()->alarms) {
431 DOSVM_QueueEvent(0,DOS_PRIORITY_REALTIME,NULL,NULL);
432 /* hmm, instead of relying on this signal counter, we should
433 * probably check how many ticks have *really* passed, probably using
434 * QueryPerformanceCounter() or something like that */
435 InterlockedDecrement(&(NtCurrentTeb()->alarms));
437 TRACE_(int)("context=%p, current=%p\n", context, current_context);
438 TRACE_(int)("cs:ip=%04lx:%04lx, ss:sp=%04lx:%04lx\n", context->SegCs, context->Eip, context->SegSs, context->Esp);
439 if (!ISV86(context)) {
440 ERR_(int)("@#&*%%, winedos signal handling is *still* messed up\n");
442 TRACE_(int)("DOS task enabled interrupts %s events pending, sending events (time=%ld)\n", IS_PEND(context)?"with":"without", GetTickCount());
443 DOSVM_SendQueuedEvents(context);
445 LeaveCriticalSection(&qcrit);
446 return EXCEPTION_CONTINUE_EXECUTION;
448 return EXCEPTION_CONTINUE_SEARCH;
451 int WINAPI DOSVM_Enter( CONTEXT86 *context )
453 CONTEXT86 *old_context = current_context;
455 current_context = context;
458 __wine_enter_vm86( context );
459 TRACE_(module)( "vm86 returned: %s\n", strerror(errno) );
461 __EXCEPT(exception_handler)
463 TRACE_(module)( "leaving vm86 mode\n" );
466 current_context = old_context;
470 /***********************************************************************
473 void WINAPI DOSVM_PIC_ioport_out( WORD port, BYTE val)
477 if ((port==0x20) && (val==0x20)) {
478 EnterCriticalSection(&qcrit);
480 /* EOI (End Of Interrupt) */
481 TRACE("received EOI for current IRQ, clearing\n");
482 event = current_event;
483 current_event = event->next;
485 (*event->relay)(NULL,event->data);
489 /* another event is pending, which we should probably
490 * be able to process now */
491 TRACE("another event pending, setting flag\n");
492 current_context->EFlags |= VIP_MASK;
495 WARN("EOI without active IRQ\n");
497 LeaveCriticalSection(&qcrit);
499 FIXME("unrecognized PIC command %02x\n",val);
503 /***********************************************************************
504 * SetTimer (WINEDOS.@)
506 void WINAPI DOSVM_SetTimer( UINT ticks )
508 struct itimerval tim;
511 /* the PC clocks ticks at 1193180 Hz */
512 tim.it_interval.tv_sec=0;
513 tim.it_interval.tv_usec=MulDiv(ticks,1000000,1193180);
515 if (!tim.it_interval.tv_usec) tim.it_interval.tv_usec=1;
516 /* first tick value */
517 tim.it_value = tim.it_interval;
518 TRACE_(int)("setting timer tick delay to %ld us\n", tim.it_interval.tv_usec);
519 setitimer(ITIMER_REAL, &tim, NULL);
523 /***********************************************************************
524 * GetTimer (WINEDOS.@)
526 UINT WINAPI DOSVM_GetTimer( void )
528 struct itimerval tim;
531 getitimer(ITIMER_REAL, &tim);
532 return MulDiv(tim.it_value.tv_usec,1193180,1000000);
537 #else /* !MZ_SUPPORTED */
539 /***********************************************************************
542 INT WINAPI DOSVM_Enter( CONTEXT86 *context )
544 ERR_(module)("DOS realmode not supported on this architecture!\n");
548 /***********************************************************************
551 void WINAPI DOSVM_Wait( INT read_pipe, HANDLE hObject) {}
553 /***********************************************************************
556 void WINAPI DOSVM_PIC_ioport_out( WORD port, BYTE val) {}
558 /***********************************************************************
559 * SetTimer (WINEDOS.@)
561 void WINAPI DOSVM_SetTimer( UINT ticks ) {}
563 /***********************************************************************
564 * GetTimer (WINEDOS.@)
566 UINT WINAPI DOSVM_GetTimer( void ) { return 0; }
568 /***********************************************************************
569 * QueueEvent (WINEDOS.@)
571 void WINAPI DOSVM_QueueEvent( INT irq, INT priority, DOSRELAY relay, LPVOID data)
574 /* callback event, perform it with dummy context */
576 memset(&context,0,sizeof(context));
577 (*relay)(&context,data);
579 ERR("IRQ without DOS task: should not happen\n");
586 /**********************************************************************
587 * DllMain (DOSVM.Init)
589 BOOL WINAPI DllMain( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved )
591 TRACE_(module)("(%p,%ld,%p)\n", hinstDLL, fdwReason, lpvReserved);
593 if (fdwReason == DLL_PROCESS_ATTACH)
595 DOSVM_InitSegments();
598 event_notifier = CreateEventA(NULL, FALSE, FALSE, NULL);
600 ERR("Failed to create event object!\n");