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 DEFAULT_DEBUG_CHANNEL(int);
39 DECLARE_DEBUG_CHANNEL(module);
40 DECLARE_DEBUG_CHANNEL(relay);
43 WORD DOSVM_retval = 0;
47 #ifdef HAVE_SYS_VM86_H
48 # include <sys/vm86.h>
50 #ifdef HAVE_SYS_MMAN_H
51 # include <sys/mman.h>
54 #define IF_CLR(ctx) ((ctx)->EFlags &= ~VIF_MASK)
55 #define IF_SET(ctx) ((ctx)->EFlags |= VIF_MASK)
56 #define IF_ENABLED(ctx) ((ctx)->EFlags & VIF_MASK)
57 #define SET_PEND(ctx) ((ctx)->EFlags |= VIP_MASK)
58 #define CLR_PEND(ctx) ((ctx)->EFlags &= ~VIP_MASK)
59 #define IS_PEND(ctx) ((ctx)->EFlags & VIP_MASK)
63 typedef struct _DOSEVENT {
67 struct _DOSEVENT *next;
68 } DOSEVENT, *LPDOSEVENT;
70 static struct _DOSEVENT *pending_event, *current_event;
71 static int sig_sent, entered;
72 static CONTEXT86 *current_context;
75 extern int read_pipe, write_pipe;
76 extern HANDLE hReadPipe;
77 extern pid_t dosmod_pid;
79 static void do_exception( int signal, CONTEXT86 *context )
82 if ((signal == SIGTRAP) || (signal == SIGHUP))
84 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
85 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
89 rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION; /* generic error */
90 rec.ExceptionFlags = EH_NONCONTINUABLE;
92 rec.ExceptionRecord = NULL;
93 rec.ExceptionAddress = (LPVOID)context->Eip;
94 rec.NumberParameters = 0;
95 EXC_RtlRaiseException( &rec, context );
98 static void DOSVM_Dump( int fn, int sig, struct vm86plus_struct*VM86 )
103 switch (VM86_TYPE(fn)) {
105 printf("Trapped signal %d\n",sig); break;
107 printf("Trapped unhandled GPF\n"); break;
109 printf("Trapped INT %02x\n",VM86_ARG(fn)); break;
111 printf("Trapped STI\n"); break;
113 printf("Trapped due to pending PIC request\n"); break;
115 printf("Trapped debug request\n"); break;
117 printf("Trapped unknown VM86 type %d arg %d\n",VM86_TYPE(fn),VM86_ARG(fn)); break;
119 #define REGS VM86->regs
120 fprintf(stderr,"AX=%04lX CX=%04lX DX=%04lX BX=%04lX\n",REGS.eax,REGS.ecx,REGS.edx,REGS.ebx);
121 fprintf(stderr,"SI=%04lX DI=%04lX SP=%04lX BP=%04lX\n",REGS.esi,REGS.edi,REGS.esp,REGS.ebp);
122 fprintf(stderr,"CS=%04X DS=%04X ES=%04X SS=%04X\n",REGS.cs,REGS.ds,REGS.es,REGS.ss);
123 fprintf(stderr,"IP=%04lX EFLAGS=%08lX\n",REGS.eip,REGS.eflags);
125 inst = PTR_REAL_TO_LIN( REGS.cs, REGS.eip );
128 for (x=0; x<8; x++) printf(" %02x",inst[x]);
132 static int DOSVM_SimulateInt( int vect, CONTEXT86 *context, BOOL inwine )
134 FARPROC16 handler=DOSVM_GetRMHandler(vect);
136 /* check for our real-mode hooks */
138 if (context->SegCs==DOSMEM_wrap_seg) {
139 /* exit from real-mode wrapper */
142 /* we could probably move some other dodgy stuff here too from dpmi.c */
144 /* check if the call is from our fake BIOS interrupt stubs */
145 if ((context->SegCs==0xf000) && !inwine) {
146 if (vect != (context->Eip/4)) {
147 TRACE("something fishy going on here (interrupt stub is %02lx)\n", context->Eip/4);
149 TRACE("builtin interrupt %02x has been branched to\n", vect);
150 DOSVM_RealModeInterrupt(vect, context);
152 /* check if the call goes to an unhooked interrupt */
153 else if (SELECTOROF(handler)==0xf000) {
154 /* if so, call it directly */
155 TRACE("builtin interrupt %02x has been invoked (through vector %02x)\n", OFFSETOF(handler)/4, vect);
156 DOSVM_RealModeInterrupt(OFFSETOF(handler)/4, context);
158 /* the interrupt is hooked, simulate interrupt in DOS space */
160 WORD*stack= PTR_REAL_TO_LIN( context->SegSs, context->Esp );
161 WORD flag=LOWORD(context->EFlags);
163 if (IF_ENABLED(context)) flag|=IF_MASK;
167 *(--stack)=context->SegCs;
168 *(--stack)=LOWORD(context->Eip);
170 context->SegCs=SELECTOROF(handler);
171 context->Eip=OFFSETOF(handler);
177 #define SHOULD_PEND(x) \
178 (x && ((!current_event) || (x->priority < current_event->priority)))
180 static void DOSVM_SendQueuedEvent(CONTEXT86 *context)
182 LPDOSEVENT event = pending_event;
184 if (SHOULD_PEND(event)) {
185 /* remove from "pending" list */
186 pending_event = event->next;
189 /* it's an IRQ, move it to "current" list */
190 event->next = current_event;
191 current_event = event;
192 TRACE("dispatching IRQ %d\n",event->irq);
193 /* note that if DOSVM_SimulateInt calls an internal interrupt directly,
194 * current_event might be cleared (and event freed) in this very call! */
195 DOSVM_SimulateInt((event->irq<8)?(event->irq+8):(event->irq-8+0x70),context,TRUE);
198 TRACE("dispatching callback event\n");
199 (*event->relay)(context,event->data);
203 if (!SHOULD_PEND(pending_event)) {
204 TRACE("clearing Pending flag\n");
209 static void DOSVM_SendQueuedEvents(CONTEXT86 *context)
211 /* we will send all queued events as long as interrupts are enabled,
212 * but IRQ events will disable interrupts again */
213 while (IS_PEND(context) && IF_ENABLED(context))
214 DOSVM_SendQueuedEvent(context);
217 /***********************************************************************
218 * QueueEvent (WINEDOS.@)
220 void WINAPI DOSVM_QueueEvent( INT irq, INT priority, DOSRELAY relay, LPVOID data)
222 LPDOSEVENT event, cur, prev;
225 event = malloc(sizeof(DOSEVENT));
227 ERR("out of memory allocating event entry\n");
230 event->irq = irq; event->priority = priority;
231 event->relay = relay; event->data = data;
233 /* insert event into linked list, in order *after*
234 * all earlier events of higher or equal priority */
235 cur = pending_event; prev = NULL;
236 while (cur && cur->priority<=priority) {
241 if (prev) prev->next = event;
242 else pending_event = event;
244 /* get dosmod's attention to the new event, if necessary */
246 TRACE("new event queued, signalling dosmod\n");
247 kill(dosmod_pid,SIGUSR2);
250 TRACE("new event queued\n");
253 /* DOS subsystem not running */
254 /* (this probably means that we're running a win16 app
255 * which uses DPMI to thunk down to DOS services) */
257 /* callback event, perform it with dummy context */
259 memset(&context,0,sizeof(context));
260 (*relay)(&context,data);
262 ERR("IRQ without DOS task: should not happen");
267 #define CV do { CP(eax,Eax); CP(ecx,Ecx); CP(edx,Edx); CP(ebx,Ebx); \
268 CP(esi,Esi); CP(edi,Edi); CP(esp,Esp); CP(ebp,Ebp); \
269 CP(cs,SegCs); CP(ds,SegDs); CP(es,SegEs); \
270 CP(ss,SegSs); CP(fs,SegFs); CP(gs,SegGs); \
271 CP(eip,Eip); CP(eflags,EFlags); } while(0)
273 static int DOSVM_Process( int fn, int sig, struct vm86plus_struct*VM86 )
275 CONTEXT86 context, *old_context;
278 #define CP(x,y) context.y = VM86->regs.x
281 if (VM86_TYPE(fn)==VM86_UNKNOWN) {
282 ret=INSTR_EmulateInstruction(&context);
283 #define CP(x,y) VM86->regs.x = context.y
290 if (VM86->vm86plus.force_return_for_pic) {
294 /* linux doesn't preserve pending flag on return */
295 if (SHOULD_PEND(pending_event)) {
300 old_context = current_context;
301 current_context = &context;
303 switch (VM86_TYPE(fn)) {
305 TRACE("DOS module caught signal %d\n",sig);
306 if ((sig==SIGALRM) || (sig==SIGUSR2)) {
309 DOSVM_QueueEvent(0,DOS_PRIORITY_REALTIME,NULL,NULL);
312 TRACE("setting Pending flag, interrupts are currently %s\n",
313 IF_ENABLED(&context) ? "enabled" : "disabled");
315 DOSVM_SendQueuedEvents(&context);
317 TRACE("no events are pending, clearing Pending flag\n");
322 else if ((sig==SIGHUP) || (sig==SIGILL) || (sig==SIGSEGV)) {
323 do_exception( sig, &context );
325 DOSVM_Dump(fn,sig,VM86);
329 case VM86_UNKNOWN: /* unhandled GPF */
330 DOSVM_Dump(fn,sig,VM86);
331 do_exception( SIGSEGV, &context );
335 DPRINTF("Call DOS int 0x%02x (EAX=%08lx) ret=%04lx:%04lx\n",VM86_ARG(fn),context.Eax,context.SegCs,context.Eip);
336 ret=DOSVM_SimulateInt(VM86_ARG(fn),&context,FALSE);
338 DPRINTF("Ret DOS int 0x%02x (EAX=%08lx) ret=%04lx:%04lx\n",VM86_ARG(fn),context.Eax,context.SegCs,context.Eip);
342 /* case VM86_PICRETURN: */
343 TRACE("DOS task enabled interrupts %s events pending, sending events\n", IS_PEND(&context)?"with":"without");
344 DOSVM_SendQueuedEvents(&context);
347 do_exception( SIGTRAP, &context );
350 DOSVM_Dump(fn,sig,VM86);
354 current_context = old_context;
356 #define CP(x,y) VM86->regs.x = context.y
360 VM86->vm86plus.force_return_for_pic = IS_PEND(&context) ? 1 : 0;
366 static void DOSVM_ProcessConsole(void)
372 if (ReadConsoleInputA(GetStdHandle(STD_INPUT_HANDLE),&msg,1,&res)) {
373 switch (msg.EventType) {
375 scan = msg.Event.KeyEvent.wVirtualScanCode;
376 if (!msg.Event.KeyEvent.bKeyDown) scan |= 0x80;
378 /* check whether extended bit is set,
379 * and if so, queue the extension prefix */
380 if (msg.Event.KeyEvent.dwControlKeyState & ENHANCED_KEY) {
381 DOSVM_Int09SendScan(0xE0,0);
383 DOSVM_Int09SendScan(scan,msg.Event.KeyEvent.uChar.AsciiChar);
386 FIXME("unhandled console event: %d\n", msg.EventType);
391 static void DOSVM_ProcessMessage(MSG *msg)
395 TRACE("got message %04x, wparam=%08x, lparam=%08lx\n",msg->message,msg->wParam,msg->lParam);
396 if ((msg->message>=WM_MOUSEFIRST)&&
397 (msg->message<=WM_MOUSELAST)) {
398 DOSVM_Int33Message(msg->message,msg->wParam,msg->lParam);
400 switch (msg->message) {
404 scan |= (msg->lParam >> 16) & 0x7f;
406 /* check whether extended bit is set,
407 * and if so, queue the extension prefix */
408 if (msg->lParam & 0x1000000) {
409 /* FIXME: some keys (function keys) have
410 * extended bit set even when they shouldn't,
411 * should check for them */
412 DOSVM_Int09SendScan(0xE0,0);
414 DOSVM_Int09SendScan(scan,0);
420 /***********************************************************************
423 void WINAPI DOSVM_Wait( INT read_pipe, HANDLE hObject )
429 BOOL got_msg = FALSE;
431 objs[0]=GetStdHandle(STD_INPUT_HANDLE);
435 /* check for messages (waste time before the response check below) */
438 while (PeekMessageA(&msg,0,0,0,PM_REMOVE|PM_NOYIELD)) {
440 DOSVM_ProcessMessage(&msg);
441 /* we don't need a TranslateMessage here */
442 DispatchMessageA(&msg);
448 /* check for console input */
451 if (PeekConsoleInputA(objs[0],&msg,1,&num) && num) {
452 DOSVM_ProcessConsole();
456 if (read_pipe == -1) {
457 /* dispatch pending events */
458 if (SHOULD_PEND(pending_event)) {
459 CONTEXT86 context = *current_context;
462 DOSVM_SendQueuedEvents(&context);
467 struct timeval timeout={0,0};
468 /* quick check for response from dosmod
469 * (faster than doing the full blocking wait, if data already available) */
470 FD_ZERO(&readfds); FD_SET(read_pipe,&readfds);
471 if (select(read_pipe+1,&readfds,NULL,NULL,&timeout)>0)
474 /* nothing yet, block while waiting for something to do */
475 if (MsgWaitForMultipleObjects)
476 waitret = MsgWaitForMultipleObjects(objc,objs,FALSE,INFINITE,QS_ALLINPUT);
478 waitret = WaitForMultipleObjects(objc,objs,FALSE,INFINITE);
480 if (waitret==(DWORD)-1) {
481 ERR_(module)("dosvm wait error=%ld\n",GetLastError());
483 if ((read_pipe != -1) && hObject) {
484 if (waitret==(WAIT_OBJECT_0+1)) break;
486 if (waitret==WAIT_OBJECT_0)
487 goto chk_console_input;
491 /***********************************************************************
494 INT WINAPI DOSVM_Enter( CONTEXT86 *context )
496 struct vm86plus_struct VM86;
499 memset(&VM86, 0, sizeof(VM86));
500 #define CP(x,y) VM86.regs.x = context->y
503 if (VM86.regs.eflags & IF_MASK)
504 VM86.regs.eflags |= VIF_MASK;
506 /* main exchange loop */
509 TRACE_(module)("thread is: %lx\n",GetCurrentThreadId());
512 /* transmit VM86 structure to dosmod task */
513 if (write(write_pipe,&stat,sizeof(stat))!=sizeof(stat)) {
514 ERR_(module)("dosmod sync lost, errno=%d, fd=%d, pid=%d\n",errno,write_pipe,getpid());
517 if (write(write_pipe,&VM86,sizeof(VM86))!=sizeof(VM86)) {
518 ERR_(module)("dosmod sync lost, errno=%d\n",errno);
521 /* wait for response, doing other things in the meantime */
522 DOSVM_Wait(read_pipe, hReadPipe);
525 if ((len=read(read_pipe,&stat,sizeof(stat)))==sizeof(stat)) break;
526 if (((errno==EINTR)||(errno==EAGAIN))&&(len<=0)) {
527 WARN_(module)("rereading dosmod return code due to errno=%d, result=%d\n",errno,len);
530 ERR_(module)("dosmod sync lost reading return code, errno=%d, result=%d\n",errno,len);
533 TRACE_(module)("dosmod return code=%d\n",stat);
534 if (stat==DOSMOD_LEFTIDLE) {
538 if ((len=read(read_pipe,&VM86,sizeof(VM86)))==sizeof(VM86)) break;
539 if (((errno==EINTR)||(errno==EAGAIN))&&(len<=0)) {
540 WARN_(module)("rereading dosmod VM86 structure due to errno=%d, result=%d\n",errno,len);
543 ERR_(module)("dosmod sync lost reading VM86 structure, errno=%d, result=%d\n",errno,len);
546 if ((stat&0xff)==DOSMOD_SIGNAL) {
548 if ((len=read(read_pipe,&sig,sizeof(sig)))==sizeof(sig)) break;
549 if (((errno==EINTR)||(errno==EAGAIN))&&(len<=0)) {
550 WARN_(module)("rereading dosmod signal due to errno=%d, result=%d\n",errno,len);
553 ERR_(module)("dosmod sync lost reading signal, errno=%d, result=%d\n",errno,len);
558 } while (DOSVM_Process(stat,sig,&VM86)>=0);
561 #define CP(x,y) context->y = VM86.regs.x
567 /***********************************************************************
570 void WINAPI DOSVM_PIC_ioport_out( WORD port, BYTE val)
574 if ((port==0x20) && (val==0x20)) {
576 /* EOI (End Of Interrupt) */
577 TRACE("received EOI for current IRQ, clearing\n");
578 event = current_event;
579 current_event = event->next;
581 (*event->relay)(NULL,event->data);
586 /* another event is pending, which we should probably
587 * be able to process now, so tell dosmod about it */
588 TRACE("another event pending, signalling dosmod\n");
589 kill(dosmod_pid,SIGUSR2);
593 WARN("EOI without active IRQ\n");
596 FIXME("unrecognized PIC command %02x\n",val);
600 /***********************************************************************
601 * SetTimer (WINEDOS.@)
603 void WINAPI DOSVM_SetTimer( UINT ticks )
605 int stat=DOSMOD_SET_TIMER;
608 if (write_pipe != -1) {
609 /* the PC clocks ticks at 1193180 Hz */
611 tim.tv_usec=MulDiv(ticks,1000000,1193180);
613 if (!tim.tv_usec) tim.tv_usec=1;
615 if (write(write_pipe,&stat,sizeof(stat))!=sizeof(stat)) {
616 ERR_(module)("dosmod sync lost, errno=%d\n",errno);
619 if (write(write_pipe,&tim,sizeof(tim))!=sizeof(tim)) {
620 ERR_(module)("dosmod sync lost, errno=%d\n",errno);
623 /* there's no return */
627 /***********************************************************************
628 * GetTimer (WINEDOS.@)
630 UINT WINAPI DOSVM_GetTimer( void )
632 int stat=DOSMOD_GET_TIMER;
635 if (write_pipe != -1) {
636 if (write(write_pipe,&stat,sizeof(stat))!=sizeof(stat)) {
637 ERR_(module)("dosmod sync lost, errno=%d\n",errno);
642 if (read(read_pipe,&tim,sizeof(tim))==sizeof(tim)) break;
643 if ((errno==EINTR)||(errno==EAGAIN)) continue;
644 ERR_(module)("dosmod sync lost, errno=%d\n",errno);
647 return MulDiv(tim.tv_usec,1193180,1000000);
652 #else /* !MZ_SUPPORTED */
654 /***********************************************************************
657 INT WINAPI DOSVM_Enter( CONTEXT86 *context )
659 ERR_(module)("DOS realmode not supported on this architecture!\n");
663 /***********************************************************************
666 void WINAPI DOSVM_Wait( INT read_pipe, HANDLE hObject) {}
668 /***********************************************************************
671 void WINAPI DOSVM_PIC_ioport_out( WORD port, BYTE val) {}
673 /***********************************************************************
674 * SetTimer (WINEDOS.@)
676 void WINAPI DOSVM_SetTimer( UINT ticks ) {}
678 /***********************************************************************
679 * GetTimer (WINEDOS.@)
681 UINT WINAPI DOSVM_GetTimer( void ) { return 0; }
683 /***********************************************************************
684 * QueueEvent (WINEDOS.@)
686 void WINAPI DOSVM_QueueEvent( INT irq, INT priority, DOSRELAY relay, LPVOID data)
689 /* callback event, perform it with dummy context */
691 memset(&context,0,sizeof(context));
692 (*relay)(&context,data);
694 ERR("IRQ without DOS task: should not happen");
700 /**********************************************************************
703 * Return the real mode interrupt vector for a given interrupt.
705 FARPROC16 DOSVM_GetRMHandler( BYTE intnum )
707 return ((FARPROC16*)DOSMEM_SystemBase())[intnum];
711 /**********************************************************************
714 * Set the real mode interrupt handler for a given interrupt.
716 void DOSVM_SetRMHandler( BYTE intnum, FARPROC16 handler )
718 TRACE("Set real mode interrupt vector %02x <- %04x:%04x\n",
719 intnum, HIWORD(handler), LOWORD(handler) );
720 ((FARPROC16*)DOSMEM_SystemBase())[intnum] = handler;
724 static const INTPROC real_mode_handlers[] =
726 /* 00 */ 0, 0, 0, 0, 0, 0, 0, 0,
727 /* 08 */ 0, DOSVM_Int09Handler, 0, 0, 0, 0, 0, 0,
728 /* 10 */ DOSVM_Int10Handler, INT_Int11Handler, INT_Int12Handler, INT_Int13Handler,
729 0, INT_Int15Handler, DOSVM_Int16Handler, DOSVM_Int17Handler,
730 /* 18 */ 0, 0, INT_Int1aHandler, 0, 0, 0, 0, 0,
731 /* 20 */ DOSVM_Int20Handler, DOSVM_Int21Handler, 0, 0, 0, INT_Int25Handler, 0, 0,
732 /* 28 */ 0, DOSVM_Int29Handler, INT_Int2aHandler, 0, 0, 0, 0, INT_Int2fHandler,
733 /* 30 */ 0, DOSVM_Int31Handler, 0, DOSVM_Int33Handler
737 /**********************************************************************
738 * DOSVM_RealModeInterrupt
740 * Handle real mode interrupts
742 void DOSVM_RealModeInterrupt( BYTE intnum, CONTEXT86 *context )
744 if (intnum < sizeof(real_mode_handlers)/sizeof(INTPROC) && real_mode_handlers[intnum])
745 (*real_mode_handlers[intnum])(context);
748 FIXME("Unknown Interrupt in DOS mode: 0x%x\n", intnum);
749 FIXME(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx\n",
750 context->Eax, context->Ebx, context->Ecx, context->Edx);
751 FIXME(" esi=%08lx edi=%08lx ds=%04lx es=%04lx\n",
752 context->Esi, context->Edi, context->SegDs, context->SegEs );
757 /**********************************************************************
760 BOOL WINAPI DOSVM_Init( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved )
762 TRACE_(module)("(0x%08x,%ld,%p)\n", hinstDLL, fdwReason, lpvReserved);
764 if (fdwReason == DLL_PROCESS_ATTACH)
766 /* initialize the memory */
767 TRACE("Initializing DOS memory structures\n");
769 DOSDEV_InstallDOSDevices();