4 * Copyright 1998 Ove Kåven
6 * This code hasn't been completely cleaned up yet.
19 #include <sys/types.h>
21 #include "wine/winbase16.h"
22 #include "wine/exception.h"
34 #include "../../loader/dos/dosmod.h"
35 #include "stackframe.h"
36 #include "debugtools.h"
38 DECLARE_DEBUG_CHANNEL(int);
39 DECLARE_DEBUG_CHANNEL(module);
40 DECLARE_DEBUG_CHANNEL(relay);
44 #ifdef HAVE_SYS_VM86_H
45 # include <sys/vm86.h>
47 #ifdef HAVE_SYS_MMAN_H
48 # include <sys/mman.h>
51 #define IF_CLR(ctx) ((ctx)->EFlags &= ~VIF_MASK)
52 #define IF_SET(ctx) ((ctx)->EFlags |= VIF_MASK)
53 #define IF_ENABLED(ctx) ((ctx)->EFlags & VIF_MASK)
54 #define SET_PEND(ctx) ((ctx)->EFlags |= VIP_MASK)
55 #define CLR_PEND(ctx) ((ctx)->EFlags &= ~VIP_MASK)
56 #define IS_PEND(ctx) ((ctx)->EFlags & VIP_MASK)
60 typedef struct _DOSEVENT {
64 struct _DOSEVENT *next;
65 } DOSEVENT, *LPDOSEVENT;
67 static struct _DOSEVENT *pending_event, *current_event;
68 static int sig_sent, entered;
69 static CONTEXT86 *current_context;
72 extern int read_pipe, write_pipe;
73 extern HANDLE hReadPipe;
74 extern pid_t dosmod_pid;
76 static void do_exception( int signal, CONTEXT86 *context )
79 if ((signal == SIGTRAP) || (signal == SIGHUP))
81 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
82 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
86 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION; /* generic error */
87 rec.ExceptionFlags = EH_NONCONTINUABLE;
89 rec.ExceptionRecord = NULL;
90 rec.ExceptionAddress = (LPVOID)context->Eip;
91 rec.NumberParameters = 0;
92 EXC_RtlRaiseException( &rec, context );
95 static void DOSVM_Dump( int fn, int sig, struct vm86plus_struct*VM86 )
100 switch (VM86_TYPE(fn)) {
102 printf("Trapped signal %d\n",sig); break;
104 printf("Trapped unhandled GPF\n"); break;
106 printf("Trapped INT %02x\n",VM86_ARG(fn)); break;
108 printf("Trapped STI\n"); break;
110 printf("Trapped due to pending PIC request\n"); break;
112 printf("Trapped debug request\n"); break;
114 printf("Trapped unknown VM86 type %d arg %d\n",VM86_TYPE(fn),VM86_ARG(fn)); break;
116 #define REGS VM86->regs
117 fprintf(stderr,"AX=%04lX CX=%04lX DX=%04lX BX=%04lX\n",REGS.eax,REGS.ecx,REGS.edx,REGS.ebx);
118 fprintf(stderr,"SI=%04lX DI=%04lX SP=%04lX BP=%04lX\n",REGS.esi,REGS.edi,REGS.esp,REGS.ebp);
119 fprintf(stderr,"CS=%04X DS=%04X ES=%04X SS=%04X\n",REGS.cs,REGS.ds,REGS.es,REGS.ss);
120 fprintf(stderr,"IP=%04lX EFLAGS=%08lX\n",REGS.eip,REGS.eflags);
122 inst = PTR_REAL_TO_LIN( REGS.cs, REGS.eip );
125 for (x=0; x<8; x++) printf(" %02x",inst[x]);
129 static int DOSVM_SimulateInt( int vect, CONTEXT86 *context, BOOL inwine )
131 FARPROC16 handler=INT_GetRMHandler(vect);
133 /* check for our real-mode hooks */
135 if (context->SegCs==DOSMEM_wrap_seg) {
136 /* exit from real-mode wrapper */
139 /* we could probably move some other dodgy stuff here too from dpmi.c */
141 /* check if the call is from our fake BIOS interrupt stubs */
142 if ((context->SegCs==0xf000) && !inwine) {
143 if (vect != (context->Eip/4)) {
144 TRACE_(int)("something fishy going on here (interrupt stub is %02lx)\n", context->Eip/4);
146 TRACE_(int)("builtin interrupt %02x has been branched to\n", vect);
147 INT_RealModeInterrupt(vect, context);
149 /* check if the call goes to an unhooked interrupt */
150 else if (SELECTOROF(handler)==0xf000) {
151 /* if so, call it directly */
152 TRACE_(int)("builtin interrupt %02x has been invoked (through vector %02x)\n", OFFSETOF(handler)/4, vect);
153 INT_RealModeInterrupt(OFFSETOF(handler)/4, context);
155 /* the interrupt is hooked, simulate interrupt in DOS space */
157 WORD*stack= PTR_REAL_TO_LIN( context->SegSs, context->Esp );
158 WORD flag=LOWORD(context->EFlags);
160 if (IF_ENABLED(context)) flag|=IF_MASK;
164 *(--stack)=context->SegCs;
165 *(--stack)=LOWORD(context->Eip);
167 context->SegCs=SELECTOROF(handler);
168 context->Eip=OFFSETOF(handler);
174 #define SHOULD_PEND(x) \
175 (x && ((!current_event) || (x->priority < current_event->priority)))
177 static void DOSVM_SendQueuedEvent(CONTEXT86 *context)
179 LPDOSEVENT event = pending_event;
181 if (SHOULD_PEND(event)) {
182 /* remove from "pending" list */
183 pending_event = event->next;
186 /* it's an IRQ, move it to "current" list */
187 event->next = current_event;
188 current_event = event;
189 TRACE_(int)("dispatching IRQ %d\n",event->irq);
190 /* note that if DOSVM_SimulateInt calls an internal interrupt directly,
191 * current_event might be cleared (and event freed) in this very call! */
192 DOSVM_SimulateInt((event->irq<8)?(event->irq+8):(event->irq-8+0x70),context,TRUE);
195 TRACE_(int)("dispatching callback event\n");
196 (*event->relay)(context,event->data);
200 if (!SHOULD_PEND(pending_event)) {
201 TRACE_(int)("clearing Pending flag\n");
206 static void DOSVM_SendQueuedEvents(CONTEXT86 *context)
208 /* we will send all queued events as long as interrupts are enabled,
209 * but IRQ events will disable interrupts again */
210 while (IS_PEND(context) && IF_ENABLED(context))
211 DOSVM_SendQueuedEvent(context);
214 /***********************************************************************
215 * QueueEvent (WINEDOS.@)
217 void WINAPI DOSVM_QueueEvent( INT irq, INT priority, DOSRELAY relay, LPVOID data)
219 LPDOSEVENT event, cur, prev;
222 event = malloc(sizeof(DOSEVENT));
224 ERR_(int)("out of memory allocating event entry\n");
227 event->irq = irq; event->priority = priority;
228 event->relay = relay; event->data = data;
230 /* insert event into linked list, in order *after*
231 * all earlier events of higher or equal priority */
232 cur = pending_event; prev = NULL;
233 while (cur && cur->priority<=priority) {
238 if (prev) prev->next = event;
239 else pending_event = event;
241 /* get dosmod's attention to the new event, if necessary */
243 TRACE_(int)("new event queued, signalling dosmod\n");
244 kill(dosmod_pid,SIGUSR2);
247 TRACE_(int)("new event queued\n");
250 /* DOS subsystem not running */
251 /* (this probably means that we're running a win16 app
252 * which uses DPMI to thunk down to DOS services) */
254 /* callback event, perform it with dummy context */
256 memset(&context,0,sizeof(context));
257 (*relay)(&context,data);
259 ERR_(int)("IRQ without DOS task: should not happen");
264 #define CV do { CP(eax,Eax); CP(ecx,Ecx); CP(edx,Edx); CP(ebx,Ebx); \
265 CP(esi,Esi); CP(edi,Edi); CP(esp,Esp); CP(ebp,Ebp); \
266 CP(cs,SegCs); CP(ds,SegDs); CP(es,SegEs); \
267 CP(ss,SegSs); CP(fs,SegFs); CP(gs,SegGs); \
268 CP(eip,Eip); CP(eflags,EFlags); } while(0)
270 static int DOSVM_Process( int fn, int sig, struct vm86plus_struct*VM86 )
272 CONTEXT86 context, *old_context;
275 #define CP(x,y) context.y = VM86->regs.x
278 if (VM86_TYPE(fn)==VM86_UNKNOWN) {
279 ret=INSTR_EmulateInstruction(&context);
280 #define CP(x,y) VM86->regs.x = context.y
287 if (VM86->vm86plus.force_return_for_pic) {
291 /* linux doesn't preserve pending flag on return */
292 if (SHOULD_PEND(pending_event)) {
297 old_context = current_context;
298 current_context = &context;
300 switch (VM86_TYPE(fn)) {
302 TRACE_(int)("DOS module caught signal %d\n",sig);
303 if ((sig==SIGALRM) || (sig==SIGUSR2)) {
306 DOSVM_QueueEvent(0,DOS_PRIORITY_REALTIME,NULL,NULL);
309 TRACE_(int)("setting Pending flag, interrupts are currently %s\n",
310 IF_ENABLED(&context) ? "enabled" : "disabled");
312 DOSVM_SendQueuedEvents(&context);
314 TRACE_(int)("no events are pending, clearing Pending flag\n");
319 else if ((sig==SIGHUP) || (sig==SIGILL) || (sig==SIGSEGV)) {
320 do_exception( sig, &context );
322 DOSVM_Dump(fn,sig,VM86);
326 case VM86_UNKNOWN: /* unhandled GPF */
327 DOSVM_Dump(fn,sig,VM86);
328 do_exception( SIGSEGV, &context );
332 DPRINTF("Call DOS int 0x%02x (EAX=%08lx) ret=%04lx:%04lx\n",VM86_ARG(fn),context.Eax,context.SegCs,context.Eip);
333 ret=DOSVM_SimulateInt(VM86_ARG(fn),&context,FALSE);
335 DPRINTF("Ret DOS int 0x%02x (EAX=%08lx) ret=%04lx:%04lx\n",VM86_ARG(fn),context.Eax,context.SegCs,context.Eip);
339 /* case VM86_PICRETURN: */
340 TRACE_(int)("DOS task enabled interrupts %s events pending, sending events\n", IS_PEND(&context)?"with":"without");
341 DOSVM_SendQueuedEvents(&context);
344 do_exception( SIGTRAP, &context );
347 DOSVM_Dump(fn,sig,VM86);
351 current_context = old_context;
353 #define CP(x,y) VM86->regs.x = context.y
357 VM86->vm86plus.force_return_for_pic = IS_PEND(&context) ? 1 : 0;
363 static void DOSVM_ProcessConsole(void)
369 if (ReadConsoleInputA(GetStdHandle(STD_INPUT_HANDLE),&msg,1,&res)) {
370 switch (msg.EventType) {
372 scan = msg.Event.KeyEvent.wVirtualScanCode;
373 if (!msg.Event.KeyEvent.bKeyDown) scan |= 0x80;
375 /* check whether extended bit is set,
376 * and if so, queue the extension prefix */
377 if (msg.Event.KeyEvent.dwControlKeyState & ENHANCED_KEY) {
378 INT_Int09SendScan(0xE0,0);
380 INT_Int09SendScan(scan,msg.Event.KeyEvent.uChar.AsciiChar);
383 FIXME_(int)("unhandled console event: %d\n", msg.EventType);
388 static void DOSVM_ProcessMessage(MSG *msg)
392 TRACE_(int)("got message %04x, wparam=%08x, lparam=%08lx\n",msg->message,msg->wParam,msg->lParam);
393 if ((msg->message>=WM_MOUSEFIRST)&&
394 (msg->message<=WM_MOUSELAST)) {
395 INT_Int33Message(msg->message,msg->wParam,msg->lParam);
397 switch (msg->message) {
401 scan |= (msg->lParam >> 16) & 0x7f;
403 /* check whether extended bit is set,
404 * and if so, queue the extension prefix */
405 if (msg->lParam & 0x1000000) {
406 /* FIXME: some keys (function keys) have
407 * extended bit set even when they shouldn't,
408 * should check for them */
409 INT_Int09SendScan(0xE0,0);
411 INT_Int09SendScan(scan,0);
417 /***********************************************************************
420 void WINAPI DOSVM_Wait( INT read_pipe, HANDLE hObject )
426 BOOL got_msg = FALSE;
428 objs[0]=GetStdHandle(STD_INPUT_HANDLE);
432 /* check for messages (waste time before the response check below) */
435 while (PeekMessageA(&msg,0,0,0,PM_REMOVE|PM_NOYIELD)) {
437 DOSVM_ProcessMessage(&msg);
438 /* we don't need a TranslateMessage here */
439 DispatchMessageA(&msg);
445 /* check for console input */
448 if (PeekConsoleInputA(objs[0],&msg,1,&num) && num) {
449 DOSVM_ProcessConsole();
453 if (read_pipe == -1) {
454 /* dispatch pending events */
455 if (SHOULD_PEND(pending_event)) {
456 CONTEXT86 context = *current_context;
459 DOSVM_SendQueuedEvents(&context);
464 struct timeval timeout={0,0};
465 /* quick check for response from dosmod
466 * (faster than doing the full blocking wait, if data already available) */
467 FD_ZERO(&readfds); FD_SET(read_pipe,&readfds);
468 if (select(read_pipe+1,&readfds,NULL,NULL,&timeout)>0)
471 /* nothing yet, block while waiting for something to do */
472 if (MsgWaitForMultipleObjects)
473 waitret = MsgWaitForMultipleObjects(objc,objs,FALSE,INFINITE,QS_ALLINPUT);
475 waitret = WaitForMultipleObjects(objc,objs,FALSE,INFINITE);
477 if (waitret==(DWORD)-1) {
478 ERR_(module)("dosvm wait error=%ld\n",GetLastError());
480 if ((read_pipe != -1) && hObject) {
481 if (waitret==(WAIT_OBJECT_0+1)) break;
483 if (waitret==WAIT_OBJECT_0)
484 goto chk_console_input;
488 /***********************************************************************
491 INT WINAPI DOSVM_Enter( CONTEXT86 *context )
493 struct vm86plus_struct VM86;
496 memset(&VM86, 0, sizeof(VM86));
497 #define CP(x,y) VM86.regs.x = context->y
500 if (VM86.regs.eflags & IF_MASK)
501 VM86.regs.eflags |= VIF_MASK;
503 /* main exchange loop */
506 TRACE_(module)("thread is: %lx\n",GetCurrentThreadId());
509 /* transmit VM86 structure to dosmod task */
510 if (write(write_pipe,&stat,sizeof(stat))!=sizeof(stat)) {
511 ERR_(module)("dosmod sync lost, errno=%d, fd=%d, pid=%d\n",errno,write_pipe,getpid());
514 if (write(write_pipe,&VM86,sizeof(VM86))!=sizeof(VM86)) {
515 ERR_(module)("dosmod sync lost, errno=%d\n",errno);
518 /* wait for response, doing other things in the meantime */
519 DOSVM_Wait(read_pipe, hReadPipe);
522 if ((len=read(read_pipe,&stat,sizeof(stat)))==sizeof(stat)) break;
523 if (((errno==EINTR)||(errno==EAGAIN))&&(len<=0)) {
524 WARN_(module)("rereading dosmod return code due to errno=%d, result=%d\n",errno,len);
527 ERR_(module)("dosmod sync lost reading return code, errno=%d, result=%d\n",errno,len);
530 TRACE_(module)("dosmod return code=%d\n",stat);
531 if (stat==DOSMOD_LEFTIDLE) {
535 if ((len=read(read_pipe,&VM86,sizeof(VM86)))==sizeof(VM86)) break;
536 if (((errno==EINTR)||(errno==EAGAIN))&&(len<=0)) {
537 WARN_(module)("rereading dosmod VM86 structure due to errno=%d, result=%d\n",errno,len);
540 ERR_(module)("dosmod sync lost reading VM86 structure, errno=%d, result=%d\n",errno,len);
543 if ((stat&0xff)==DOSMOD_SIGNAL) {
545 if ((len=read(read_pipe,&sig,sizeof(sig)))==sizeof(sig)) break;
546 if (((errno==EINTR)||(errno==EAGAIN))&&(len<=0)) {
547 WARN_(module)("rereading dosmod signal due to errno=%d, result=%d\n",errno,len);
550 ERR_(module)("dosmod sync lost reading signal, errno=%d, result=%d\n",errno,len);
555 } while (DOSVM_Process(stat,sig,&VM86)>=0);
558 #define CP(x,y) context->y = VM86.regs.x
564 /***********************************************************************
567 void WINAPI DOSVM_PIC_ioport_out( WORD port, BYTE val)
571 if ((port==0x20) && (val==0x20)) {
573 /* EOI (End Of Interrupt) */
574 TRACE_(int)("received EOI for current IRQ, clearing\n");
575 event = current_event;
576 current_event = event->next;
578 (*event->relay)(NULL,event->data);
583 /* another event is pending, which we should probably
584 * be able to process now, so tell dosmod about it */
585 TRACE_(int)("another event pending, signalling dosmod\n");
586 kill(dosmod_pid,SIGUSR2);
590 WARN_(int)("EOI without active IRQ\n");
593 FIXME_(int)("unrecognized PIC command %02x\n",val);
597 /***********************************************************************
598 * SetTimer (WINEDOS.@)
600 void WINAPI DOSVM_SetTimer( UINT ticks )
602 int stat=DOSMOD_SET_TIMER;
606 /* the PC clocks ticks at 1193180 Hz */
608 tim.tv_usec=MulDiv(ticks,1000000,1193180);
610 if (!tim.tv_usec) tim.tv_usec=1;
612 if (write(write_pipe,&stat,sizeof(stat))!=sizeof(stat)) {
613 ERR_(module)("dosmod sync lost, errno=%d\n",errno);
616 if (write(write_pipe,&tim,sizeof(tim))!=sizeof(tim)) {
617 ERR_(module)("dosmod sync lost, errno=%d\n",errno);
620 /* there's no return */
624 /***********************************************************************
625 * GetTimer (WINEDOS.@)
627 UINT WINAPI DOSVM_GetTimer( void )
629 int stat=DOSMOD_GET_TIMER;
633 if (write(write_pipe,&stat,sizeof(stat))!=sizeof(stat)) {
634 ERR_(module)("dosmod sync lost, errno=%d\n",errno);
639 if (read(read_pipe,&tim,sizeof(tim))==sizeof(tim)) break;
640 if ((errno==EINTR)||(errno==EAGAIN)) continue;
641 ERR_(module)("dosmod sync lost, errno=%d\n",errno);
644 return MulDiv(tim.tv_usec,1193180,1000000);
649 #else /* !MZ_SUPPORTED */
651 /***********************************************************************
654 INT WINAPI DOSVM_Enter( CONTEXT86 *context )
656 ERR_(module)("DOS realmode not supported on this architecture!\n");
660 /***********************************************************************
663 void WINAPI DOSVM_Wait( INT read_pipe, HANDLE hObject) {}
665 /***********************************************************************
668 void WINAPI DOSVM_PIC_ioport_out( WORD port, BYTE val) {}
670 /***********************************************************************
671 * SetTimer (WINEDOS.@)
673 void WINAPI DOSVM_SetTimer( UINT ticks ) {}
675 /***********************************************************************
676 * GetTimer (WINEDOS.@)
678 UINT WINAPI DOSVM_GetTimer( void ) { return 0; }
680 /***********************************************************************
681 * QueueEvent (WINEDOS.@)
683 void WINAPI DOSVM_QueueEvent( INT irq, INT priority, DOSRELAY relay, LPVOID data)
686 /* callback event, perform it with dummy context */
688 memset(&context,0,sizeof(context));
689 (*relay)(&context,data);
691 ERR_(int)("IRQ without DOS task: should not happen");