4 * Copyright 1995 Alexandre Julliard
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
22 #include "wine/port.h"
28 #include "wine/winbase16.h"
33 #include "wine/debug.h"
34 #include "wine/exception.h"
37 WINE_DEFAULT_DEBUG_CHANNEL(int31);
39 /* Structure for real-mode callbacks */
61 typedef struct tagRMCB {
63 DWORD proc_ofs,proc_sel;
64 DWORD regs_ofs,regs_sel;
68 static RMCB *FirstRMCB = NULL;
69 static WORD dpmi_flag;
70 static void* lastvalloced = NULL;
71 static BYTE DPMI_retval;
73 /**********************************************************************
76 * Return TRUE if we are in 32-bit protected mode DOS process.
78 BOOL DOSVM_IsDos32(void)
80 return (dpmi_flag & 1) ? TRUE : FALSE;
84 /**********************************************************************
87 * Allocate a 64k sized selector corresponding to a real mode segment.
89 static WORD alloc_pm_selector( WORD seg, unsigned char flags )
91 WORD sel = wine_ldt_alloc_entries( 1 );
96 wine_ldt_set_base( &entry, (void *)(seg << 4) );
97 wine_ldt_set_limit( &entry, 0xffff );
98 wine_ldt_set_flags( &entry, flags );
99 wine_ldt_set_entry( sel, &entry );
105 /**********************************************************************
106 * dpmi_exception_handler
108 * Handle EXCEPTION_VM86_STI exceptions generated
109 * when there are pending asynchronous events.
111 static WINE_EXCEPTION_FILTER(dpmi_exception_handler)
114 EXCEPTION_RECORD *rec = GetExceptionInformation()->ExceptionRecord;
115 CONTEXT *context = GetExceptionInformation()->ContextRecord;
117 if (rec->ExceptionCode == EXCEPTION_VM86_STI)
120 ERR( "Real mode STI caught by protected mode handler!\n" );
121 DOSVM_SendQueuedEvents(context);
122 return EXCEPTION_CONTINUE_EXECUTION;
124 else if (rec->ExceptionCode == EXCEPTION_VM86_INTx)
127 ERR( "Real mode INTx caught by protected mode handler!\n" );
128 DPMI_retval = (BYTE)rec->ExceptionInformation[0];
129 return EXCEPTION_EXECUTE_HANDLER;
133 return EXCEPTION_CONTINUE_SEARCH;
137 /**********************************************************************
138 * INT_GetRealModeContext
140 static void INT_GetRealModeContext( REALMODECALL *call, CONTEXT86 *context )
142 context->Eax = call->eax;
143 context->Ebx = call->ebx;
144 context->Ecx = call->ecx;
145 context->Edx = call->edx;
146 context->Esi = call->esi;
147 context->Edi = call->edi;
148 context->Ebp = call->ebp;
149 context->EFlags = call->fl | V86_FLAG;
150 context->Eip = call->ip;
151 context->Esp = call->sp;
152 context->SegCs = call->cs;
153 context->SegDs = call->ds;
154 context->SegEs = call->es;
155 context->SegFs = call->fs;
156 context->SegGs = call->gs;
157 context->SegSs = call->ss;
161 /**********************************************************************
162 * INT_SetRealModeContext
164 static void INT_SetRealModeContext( REALMODECALL *call, CONTEXT86 *context )
166 call->eax = context->Eax;
167 call->ebx = context->Ebx;
168 call->ecx = context->Ecx;
169 call->edx = context->Edx;
170 call->esi = context->Esi;
171 call->edi = context->Edi;
172 call->ebp = context->Ebp;
173 call->fl = LOWORD(context->EFlags);
174 call->ip = LOWORD(context->Eip);
175 call->sp = LOWORD(context->Esp);
176 call->cs = context->SegCs;
177 call->ds = context->SegDs;
178 call->es = context->SegEs;
179 call->fs = context->SegFs;
180 call->gs = context->SegGs;
181 call->ss = context->SegSs;
184 /**********************************************************************
186 * special virtualalloc, allocates lineary monoton growing memory.
187 * (the usual VirtualAlloc does not satisfy that restriction)
189 static LPVOID DPMI_xalloc( DWORD len )
192 LPVOID oldlastv = lastvalloced;
201 ret = VirtualAlloc( lastvalloced, len,
202 MEM_COMMIT|MEM_RESERVE, PAGE_EXECUTE_READWRITE );
204 lastvalloced = (char *) lastvalloced + 0x10000;
206 /* we failed to allocate one in the first round.
209 if (!xflag && (lastvalloced<oldlastv))
212 FIXME( "failed to allocate linearly growing memory (%d bytes), "
213 "using non-linear growing...\n", len );
217 /* if we even fail to allocate something in the next
220 if ((xflag==1) && (lastvalloced >= oldlastv))
223 if ((xflag==2) && (lastvalloced < oldlastv)) {
224 FIXME( "failed to allocate any memory of %d bytes!\n", len );
231 ret = VirtualAlloc( NULL, len,
232 MEM_COMMIT|MEM_RESERVE, PAGE_EXECUTE_READWRITE );
235 lastvalloced = (LPVOID)(((DWORD)ret+len+0xffff)&~0xffff);
239 /**********************************************************************
242 static void DPMI_xfree( LPVOID ptr )
244 VirtualFree( ptr, 0, MEM_RELEASE );
247 /**********************************************************************
250 * FIXME: perhaps we could grow this mapped area...
252 static LPVOID DPMI_xrealloc( LPVOID ptr, DWORD newsize )
254 MEMORY_BASIC_INFORMATION mbi;
257 newptr = DPMI_xalloc( newsize );
260 if (!VirtualQuery(ptr,&mbi,sizeof(mbi)))
262 FIXME( "realloc of DPMI_xallocd region %p?\n", ptr );
266 if (mbi.State == MEM_FREE)
268 FIXME( "realloc of DPMI_xallocd region %p?\n", ptr );
272 /* We do not shrink allocated memory. most reallocs
273 * only do grows anyway
275 if (newsize <= mbi.RegionSize)
278 memcpy( newptr, ptr, mbi.RegionSize );
288 void DPMI_CallRMCB32(RMCB *rmcb, UINT16 ss, DWORD esp, UINT16*es, DWORD*edi)
289 #if 0 /* original code, which early gccs puke on */
292 __asm__ __volatile__(
300 ".byte 0x36, 0xff, 0x18\n" /* lcall *%ss:(%eax) */
306 : "=d" (*es), "=D" (*edi), "=S" (_clobber), "=a" (_clobber), "=c" (_clobber)
307 : "0" (ss), "2" (esp),
308 "4" (rmcb->regs_sel), "1" (rmcb->regs_ofs),
309 "3" (&rmcb->proc_ofs) );
311 #else /* code generated by a gcc new enough */
313 __ASM_GLOBAL_FUNC(DPMI_CallRMCB32,
318 "movl 0x8(%ebp),%eax\n\t"
319 "movl 0x10(%ebp),%esi\n\t"
320 "movl 0xc(%ebp),%edx\n\t"
321 "movl 0x10(%eax),%ecx\n\t"
322 "movl 0xc(%eax),%edi\n\t"
331 ".byte 0x36, 0xff, 0x18\n\t" /* lcall *%ss:(%eax) */
337 "movl 0x14(%ebp),%eax\n\t"
338 "movw %dx,(%eax)\n\t"
339 "movl 0x18(%ebp),%edx\n\t"
340 "movl %edi,(%edx)\n\t"
347 #endif /* __i386__ */
349 /**********************************************************************
352 * This routine does the hard work of calling a callback procedure.
354 static void DPMI_CallRMCBProc( CONTEXT86 *context, RMCB *rmcb, WORD flag )
356 DWORD old_vif = NtCurrentTeb()->dpmi_vif;
358 /* Disable virtual interrupts. */
359 NtCurrentTeb()->dpmi_vif = 0;
361 if (wine_ldt_is_system( rmcb->proc_sel )) {
362 /* Wine-internal RMCB, call directly */
363 ((RMCBPROC)rmcb->proc_ofs)(context);
369 INT_SetRealModeContext(MapSL(MAKESEGPTR( rmcb->regs_sel, rmcb->regs_ofs )), context);
370 ss = alloc_pm_selector( context->SegSs, WINE_LDT_FLAGS_DATA );
373 FIXME("untested!\n");
375 /* The called proc ends with an IRET, and takes these parameters:
376 * DS:ESI = pointer to real-mode SS:SP
377 * ES:EDI = pointer to real-mode call structure
379 * ES:EDI = pointer to real-mode call structure (may be a copy)
380 * It is the proc's responsibility to change the return CS:IP in the
381 * real-mode call structure. */
383 /* 32-bit DPMI client */
384 DPMI_CallRMCB32(rmcb, ss, esp, &es, &edi);
386 /* 16-bit DPMI client */
387 CONTEXT86 ctx = *context;
388 ctx.SegCs = rmcb->proc_sel;
389 ctx.Eip = rmcb->proc_ofs;
392 ctx.SegEs = rmcb->regs_sel;
393 ctx.Edi = rmcb->regs_ofs;
394 /* FIXME: I'm pretty sure this isn't right - should push flags first */
395 WOWCallback16Ex( 0, WCB16_REGS, 0, NULL, (DWORD *)&ctx );
399 wine_ldt_free_entries( ss, 1 );
400 INT_GetRealModeContext( MapSL( MAKESEGPTR( es, edi )), context);
402 ERR("RMCBs only implemented for i386\n");
404 } __EXCEPT(dpmi_exception_handler) { } __ENDTRY
406 /* Restore virtual interrupt flag. */
407 NtCurrentTeb()->dpmi_vif = old_vif;
411 /**********************************************************************
414 * This routine does the hard work of calling a real mode procedure.
416 int DPMI_CallRMProc( CONTEXT86 *context, LPWORD stack, int args, int iret )
419 LPVOID addr = NULL; /* avoid gcc warning */
421 int alloc = 0, already = 0;
424 TRACE("EAX=%08x EBX=%08x ECX=%08x EDX=%08x\n",
425 context->Eax, context->Ebx, context->Ecx, context->Edx );
426 TRACE("ESI=%08x EDI=%08x ES=%04x DS=%04x CS:IP=%04x:%04x, %d WORD arguments, %s\n",
427 context->Esi, context->Edi, context->SegEs, context->SegDs,
428 context->SegCs, LOWORD(context->Eip), args, iret?"IRET":"FAR" );
432 /* there might be some code that just jumps to RMCBs or the like,
433 in which case following the jumps here might get us to a shortcut */
434 code = CTX_SEG_OFF_TO_LIN(context, context->SegCs, context->Eip);
436 case 0xe9: /* JMP NEAR */
437 context->Eip += 3 + *(WORD *)(code+1);
438 /* yeah, I know these gotos don't look good... */
439 goto callrmproc_again;
440 case 0xea: /* JMP FAR */
441 context->Eip = *(WORD *)(code+1);
442 context->SegCs = *(WORD *)(code+3);
443 /* ...but since the label is there anyway... */
444 goto callrmproc_again;
445 case 0xeb: /* JMP SHORT */
446 context->Eip += 2 + *(signed char *)(code+1);
447 /* ...because of other gotos below, so... */
448 goto callrmproc_again;
451 /* shortcut for chaining to internal interrupt handlers */
452 if ((context->SegCs == 0xF000) && iret)
454 DOSVM_CallBuiltinHandler( context, LOWORD(context->Eip)/4 );
458 /* shortcut for RMCBs */
459 CurrRMCB = FirstRMCB;
461 while (CurrRMCB && (HIWORD(CurrRMCB->address) != context->SegCs))
462 CurrRMCB = CurrRMCB->next;
464 if (!CurrRMCB && !MZ_Current())
466 FIXME("DPMI real-mode call using DOS VM task system, not fully tested!\n");
467 TRACE("creating VM86 task\n");
471 if (!context->SegSs) {
472 alloc = 1; /* allocate default stack */
473 stack16 = addr = DOSMEM_AllocBlock( 64, (UINT16 *)&(context->SegSs) );
477 ERR("could not allocate default stack\n");
481 stack16 = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp);
483 context->Esp -= (args + (iret?1:0)) * sizeof(WORD);
485 if (args) memcpy(stack16, stack, args*sizeof(WORD) );
486 /* push flags if iret */
489 *stack16 = LOWORD(context->EFlags);
491 /* push return address (return to interrupt wrapper) */
492 *(--stack16) = DOSVM_dpmi_segments->wrap_seg;
495 context->Esp -= 2*sizeof(WORD);
500 /* RMCB call, invoke protected-mode handler directly */
501 DPMI_CallRMCBProc(context, CurrRMCB, dpmi_flag);
502 /* check if we returned to where we thought we would */
503 if ((context->SegCs != DOSVM_dpmi_segments->wrap_seg) ||
504 (LOWORD(context->Eip) != 0)) {
505 /* we need to continue at different address in real-mode space,
506 so we need to set it all up for real mode again */
507 goto callrmproc_again;
510 TRACE("entering real mode...\n");
511 DOSVM_Enter( context );
512 TRACE("returned from real-mode call\n");
514 if (alloc) DOSMEM_FreeBlock( addr );
519 /**********************************************************************
522 static void DOSVM_CallRMInt( CONTEXT86 *context )
524 CONTEXT86 realmode_ctx;
525 FARPROC16 rm_int = DOSVM_GetRMHandler( BL_reg(context) );
526 REALMODECALL *call = CTX_SEG_OFF_TO_LIN( context,
529 INT_GetRealModeContext( call, &realmode_ctx );
531 /* we need to check if a real-mode program has hooked the interrupt */
532 if (HIWORD(rm_int)!=0xF000) {
533 /* yup, which means we need to switch to real mode... */
534 realmode_ctx.SegCs = HIWORD(rm_int);
535 realmode_ctx.Eip = LOWORD(rm_int);
536 if (DPMI_CallRMProc( &realmode_ctx, NULL, 0, TRUE))
539 RESET_CFLAG(context);
540 /* use the IP we have instead of BL_reg, in case some apps
541 decide to move interrupts around for whatever reason... */
542 DOSVM_CallBuiltinHandler( &realmode_ctx, LOWORD(rm_int)/4 );
544 INT_SetRealModeContext( call, &realmode_ctx );
548 /**********************************************************************
551 static void DOSVM_CallRMProc( CONTEXT86 *context, int iret )
553 REALMODECALL *p = CTX_SEG_OFF_TO_LIN( context,
558 TRACE("RealModeCall: EAX=%08x EBX=%08x ECX=%08x EDX=%08x\n",
559 p->eax, p->ebx, p->ecx, p->edx);
560 TRACE(" ESI=%08x EDI=%08x ES=%04x DS=%04x CS:IP=%04x:%04x, %d WORD arguments, %s\n",
561 p->esi, p->edi, p->es, p->ds, p->cs, p->ip, CX_reg(context), iret?"IRET":"FAR" );
563 if (!(p->cs) && !(p->ip)) { /* remove this check
564 if Int21/6501 case map function
565 has been implemented */
569 INT_GetRealModeContext(p, &context16);
570 DPMI_CallRMProc( &context16, ((LPWORD)MapSL(MAKESEGPTR(context->SegSs, LOWORD(context->Esp))))+3,
571 CX_reg(context), iret );
572 INT_SetRealModeContext(p, &context16);
576 /* (see dosmem.c, function DOSMEM_InitDPMI) */
577 static void StartPM( CONTEXT86 *context )
579 UINT16 cs, ss, ds, es;
581 DWORD psp_ofs = (DWORD)(DOSVM_psp<<4);
582 PDB16 *psp = (PDB16 *)psp_ofs;
583 HANDLE16 env_seg = psp->environment;
584 unsigned char selflags = WINE_LDT_FLAGS_DATA;
586 RESET_CFLAG(context);
587 dpmi_flag = AX_reg(context);
588 /* our mode switch wrapper have placed the desired CS into DX */
589 cs = alloc_pm_selector( context->Edx, WINE_LDT_FLAGS_CODE );
590 /* due to a flaw in some CPUs (at least mine), it is best to mark stack segments as 32-bit if they
591 can be used in 32-bit code. Otherwise, these CPUs may not set the high word of esp during a
592 ring transition (from kernel code) to the 16-bit stack, and this causes trouble if executing
593 32-bit code using this stack. */
594 if (dpmi_flag & 1) selflags |= WINE_LDT_FLAGS_32BIT;
595 ss = alloc_pm_selector( context->SegSs, selflags );
596 /* do the same for the data segments, just in case */
597 if (context->SegDs == context->SegSs) ds = ss;
598 else ds = alloc_pm_selector( context->SegDs, selflags );
599 es = alloc_pm_selector( DOSVM_psp, selflags );
600 /* convert environment pointer, as the spec says, but we're a bit lazy about the size here... */
601 psp->environment = alloc_pm_selector( env_seg, WINE_LDT_FLAGS_DATA );
604 pm_ctx.SegCs = DOSVM_dpmi_segments->dpmi_sel;
605 /* our mode switch wrapper expects the new CS in DX, and the new SS in AX */
610 pm_ctx.SegFs = wine_get_fs();
611 pm_ctx.SegGs = wine_get_gs();
612 pm_ctx.EFlags &= ~V86_FLAG;
614 TRACE("DOS program is now entering %d-bit protected mode\n",
615 DOSVM_IsDos32() ? 32 : 16);
619 WOWCallback16Ex( 0, WCB16_REGS, 0, NULL, (DWORD *)&pm_ctx );
621 __EXCEPT(dpmi_exception_handler)
626 TRACE( "Protected mode DOS program is terminating\n" );
629 * FIXME: Instead of calling ExitThread, we should release all
630 * allocated protected mode resources and call MZ_Exit
631 * using real mode context. See DPMI specification.
633 ExitThread( DPMI_retval );
636 wine_ldt_free_entries( psp->environment, 1 );
637 psp->environment = env_seg;
638 wine_ldt_free_entries(es,1);
639 if (ds != ss) wine_ldt_free_entries(ds,1);
640 wine_ldt_free_entries(ss,1);
641 wine_ldt_free_entries(cs,1);
645 static RMCB *DPMI_AllocRMCB( void )
647 RMCB *NewRMCB = HeapAlloc(GetProcessHeap(), 0, sizeof(RMCB));
652 LPVOID RMCBmem = DOSMEM_AllocBlock(4, &uParagraph);
655 *p++ = 0xcd; /* RMCB: */
656 *p++ = 0x31; /* int $0x31 */
657 /* it is the called procedure's task to change the return CS:EIP
658 the DPMI 0.9 spec states that if it doesn't, it will be called again */
660 *p++ = 0xfc; /* jmp RMCB */
661 NewRMCB->address = MAKELONG(0, uParagraph);
662 NewRMCB->next = FirstRMCB;
669 FARPROC16 WINAPI DPMI_AllocInternalRMCB( RMCBPROC proc )
671 RMCB *NewRMCB = DPMI_AllocRMCB();
674 NewRMCB->proc_ofs = (DWORD)proc;
675 NewRMCB->proc_sel = 0;
676 NewRMCB->regs_ofs = 0;
677 NewRMCB->regs_sel = 0;
678 return (FARPROC16)(NewRMCB->address);
684 static int DPMI_FreeRMCB( DWORD address )
686 RMCB *CurrRMCB = FirstRMCB;
687 RMCB *PrevRMCB = NULL;
689 while (CurrRMCB && (CurrRMCB->address != address))
692 CurrRMCB = CurrRMCB->next;
697 PrevRMCB->next = CurrRMCB->next;
699 FirstRMCB = CurrRMCB->next;
700 DOSMEM_FreeBlock(PTR_REAL_TO_LIN(SELECTOROF(CurrRMCB->address),OFFSETOF(CurrRMCB->address)));
701 HeapFree(GetProcessHeap(), 0, CurrRMCB);
708 void WINAPI DPMI_FreeInternalRMCB( FARPROC16 proc )
710 DPMI_FreeRMCB( (DWORD)proc );
714 /**********************************************************************
715 * DOSVM_RawModeSwitchHandler
717 * DPMI Raw Mode Switch handler
719 void WINAPI DOSVM_RawModeSwitchHandler( CONTEXT86 *context )
724 /* initialize real-mode context as per spec */
725 memset(&rm_ctx, 0, sizeof(rm_ctx));
726 rm_ctx.SegDs = AX_reg(context);
727 rm_ctx.SegEs = CX_reg(context);
728 rm_ctx.SegSs = DX_reg(context);
729 rm_ctx.Esp = context->Ebx;
730 rm_ctx.SegCs = SI_reg(context);
731 rm_ctx.Eip = context->Edi;
732 rm_ctx.Ebp = context->Ebp;
736 /* Copy interrupt state. */
737 if (NtCurrentTeb()->dpmi_vif)
738 rm_ctx.EFlags = V86_FLAG | VIF_MASK;
740 rm_ctx.EFlags = V86_FLAG;
742 /* enter real mode again */
743 TRACE("re-entering real mode at %04x:%04x\n",rm_ctx.SegCs,rm_ctx.Eip);
744 ret = DOSVM_Enter( &rm_ctx );
745 /* when the real-mode stuff call its mode switch address,
746 DOSVM_Enter will return and we will continue here */
750 /* if the sync was lost, there's no way to recover */
754 /* alter protected-mode context as per spec */
755 context->SegDs = LOWORD(rm_ctx.Eax);
756 context->SegEs = LOWORD(rm_ctx.Ecx);
757 context->SegSs = LOWORD(rm_ctx.Edx);
758 context->Esp = rm_ctx.Ebx;
759 context->SegCs = LOWORD(rm_ctx.Esi);
760 context->Eip = rm_ctx.Edi;
761 context->Ebp = rm_ctx.Ebp;
765 /* Copy interrupt state. */
766 if (rm_ctx.EFlags & VIF_MASK)
767 NtCurrentTeb()->dpmi_vif = 1;
769 NtCurrentTeb()->dpmi_vif = 0;
771 /* Return to new address and hope that we didn't mess up */
772 TRACE("re-entering protected mode at %04x:%08x\n",
773 context->SegCs, context->Eip);
777 /**********************************************************************
780 static void DOSVM_AllocRMCB( CONTEXT86 *context )
782 RMCB *NewRMCB = DPMI_AllocRMCB();
784 TRACE("Function to call: %04x:%04x\n", (WORD)context->SegDs, SI_reg(context) );
788 NewRMCB->proc_ofs = DOSVM_IsDos32() ? context->Esi : LOWORD(context->Esi);
789 NewRMCB->proc_sel = context->SegDs;
790 NewRMCB->regs_ofs = DOSVM_IsDos32() ? context->Edi : LOWORD(context->Edi);
791 NewRMCB->regs_sel = context->SegEs;
792 SET_CX( context, HIWORD(NewRMCB->address) );
793 SET_DX( context, LOWORD(NewRMCB->address) );
797 SET_AX( context, 0x8015 ); /* callback unavailable */
803 /**********************************************************************
806 static void DOSVM_FreeRMCB( CONTEXT86 *context )
808 FIXME("callback address: %04x:%04x\n",
809 CX_reg(context), DX_reg(context));
811 if (DPMI_FreeRMCB(MAKELONG(DX_reg(context), CX_reg(context)))) {
812 SET_AX( context, 0x8024 ); /* invalid callback address */
818 /**********************************************************************
819 * DOSVM_CheckWrappers
821 * Check if this was really a wrapper call instead of an interrupt.
823 BOOL DOSVM_CheckWrappers( CONTEXT86 *context )
825 if (context->SegCs==DOSVM_dpmi_segments->dpmi_seg) {
826 /* This is the protected mode switch */
830 else if (context->SegCs==DOSVM_dpmi_segments->xms_seg)
832 /* This is the XMS driver entry point */
833 XMS_Handler(context);
839 RMCB *CurrRMCB = FirstRMCB;
841 while (CurrRMCB && (HIWORD(CurrRMCB->address) != context->SegCs))
842 CurrRMCB = CurrRMCB->next;
845 /* RMCB call, propagate to protected-mode handler */
846 DPMI_CallRMCBProc(context, CurrRMCB, dpmi_flag);
854 /**********************************************************************
855 * DOSVM_Int31Handler (WINEDOS16.149)
857 * Handler for int 31h (DPMI).
859 void WINAPI DOSVM_Int31Handler( CONTEXT86 *context )
861 RESET_CFLAG(context);
862 switch(AX_reg(context))
864 case 0x0000: /* Allocate LDT descriptors */
865 TRACE( "allocate LDT descriptors (%d)\n", CX_reg(context) );
867 WORD sel = AllocSelectorArray16( CX_reg(context) );
871 SET_AX( context, 0x8011 ); /* descriptor unavailable */
872 SET_CFLAG( context );
876 TRACE( "success, array starts at 0x%04x\n", sel );
877 SET_AX( context, sel );
882 case 0x0001: /* Free LDT descriptor */
883 TRACE( "free LDT descriptor (0x%04x)\n", BX_reg(context) );
884 if (FreeSelector16( BX_reg(context) ))
886 SET_AX( context, 0x8022 ); /* invalid selector */
887 SET_CFLAG( context );
891 /* If a segment register contains the selector being freed, */
892 /* set it to zero. */
893 if (!((context->SegDs^BX_reg(context)) & ~3)) context->SegDs = 0;
894 if (!((context->SegEs^BX_reg(context)) & ~3)) context->SegEs = 0;
895 if (!((context->SegFs^BX_reg(context)) & ~3)) context->SegFs = 0;
896 if (!((context->SegGs^BX_reg(context)) & ~3)) context->SegGs = 0;
900 case 0x0002: /* Real mode segment to descriptor */
901 TRACE( "real mode segment to descriptor (0x%04x)\n", BX_reg(context) );
903 WORD entryPoint = 0; /* KERNEL entry point for descriptor */
904 switch(BX_reg(context))
906 case 0x0000: entryPoint = 183; break; /* __0000H */
907 case 0x0040: entryPoint = 193; break; /* __0040H */
908 case 0xa000: entryPoint = 174; break; /* __A000H */
909 case 0xb000: entryPoint = 181; break; /* __B000H */
910 case 0xb800: entryPoint = 182; break; /* __B800H */
911 case 0xc000: entryPoint = 195; break; /* __C000H */
912 case 0xd000: entryPoint = 179; break; /* __D000H */
913 case 0xe000: entryPoint = 190; break; /* __E000H */
914 case 0xf000: entryPoint = 194; break; /* __F000H */
916 FIXME("Real mode segment (%x) to descriptor: no longer supported\n",
918 SET_CFLAG( context );
923 FARPROC16 proc = GetProcAddress16( GetModuleHandle16( "KERNEL" ),
924 (LPCSTR)(ULONG_PTR)entryPoint );
925 SET_AX( context, LOWORD(proc) );
930 case 0x0003: /* Get next selector increment */
931 TRACE("get selector increment (__AHINCR)\n");
932 context->Eax = __AHINCR;
935 case 0x0004: /* Lock selector (not supported) */
936 FIXME("lock selector not supported\n");
937 context->Eax = 0; /* FIXME: is this a correct return value? */
940 case 0x0005: /* Unlock selector (not supported) */
941 FIXME("unlock selector not supported\n");
942 context->Eax = 0; /* FIXME: is this a correct return value? */
945 case 0x0006: /* Get selector base address */
946 TRACE( "get selector base address (0x%04x)\n", BX_reg(context) );
949 WORD sel = BX_reg(context);
950 wine_ldt_get_entry( sel, &entry );
951 if (wine_ldt_is_empty(&entry))
953 context->Eax = 0x8022; /* invalid selector */
958 void *base = wine_ldt_get_base(&entry);
959 SET_CX( context, HIWORD(base) );
960 SET_DX( context, LOWORD(base) );
965 case 0x0007: /* Set selector base address */
967 DWORD base = MAKELONG( DX_reg(context), CX_reg(context) );
968 WORD sel = BX_reg(context);
969 TRACE( "set selector base address (0x%04x,0x%08x)\n", sel, base );
971 /* check if Win16 app wants to access lower 64K of DOS memory */
972 if (base < 0x10000 && DOSVM_IsWin16())
973 DOSMEM_MapDosLayout();
975 SetSelectorBase( sel, base );
979 case 0x0008: /* Set selector limit */
981 DWORD limit = MAKELONG( DX_reg(context), CX_reg(context) );
982 TRACE( "set selector limit (0x%04x,0x%08x)\n",
983 BX_reg(context), limit );
984 SetSelectorLimit16( BX_reg(context), limit );
988 case 0x0009: /* Set selector access rights */
989 TRACE( "set selector access rights(0x%04x,0x%04x)\n",
990 BX_reg(context), CX_reg(context) );
991 SelectorAccessRights16( BX_reg(context), 1, CX_reg(context) );
994 case 0x000a: /* Allocate selector alias */
995 TRACE( "allocate selector alias (0x%04x)\n", BX_reg(context) );
996 SET_AX( context, AllocCStoDSAlias16( BX_reg(context) ) );
997 if (!AX_reg(context))
999 SET_AX( context, 0x8011 ); /* descriptor unavailable */
1004 case 0x000b: /* Get descriptor */
1005 TRACE( "get descriptor (0x%04x)\n", BX_reg(context) );
1007 LDT_ENTRY *entry = (LDT_ENTRY*)CTX_SEG_OFF_TO_LIN( context,
1010 wine_ldt_get_entry( BX_reg(context), entry );
1014 case 0x000c: /* Set descriptor */
1015 TRACE( "set descriptor (0x%04x)\n", BX_reg(context) );
1017 LDT_ENTRY *entry = (LDT_ENTRY*)CTX_SEG_OFF_TO_LIN( context,
1020 wine_ldt_set_entry( BX_reg(context), entry );
1024 case 0x000d: /* Allocate specific LDT descriptor */
1025 FIXME( "allocate descriptor (0x%04x), stub!\n", BX_reg(context) );
1026 SET_AX( context, 0x8011 ); /* descriptor unavailable */
1027 SET_CFLAG( context );
1030 case 0x000e: /* Get Multiple Descriptors (1.0) */
1031 FIXME( "get multiple descriptors - unimplemented\n" );
1034 case 0x000f: /* Set Multiple Descriptors (1.0) */
1035 FIXME( "set multiple descriptors - unimplemented\n" );
1038 case 0x0100: /* Allocate DOS memory block */
1039 TRACE( "allocate DOS memory block (0x%x paragraphs)\n", BX_reg(context) );
1041 DWORD dw = GlobalDOSAlloc16( (DWORD)BX_reg(context) << 4 );
1043 SET_AX( context, HIWORD(dw) );
1044 SET_DX( context, LOWORD(dw) );
1046 SET_AX( context, 0x0008 ); /* insufficient memory */
1047 SET_BX( context, DOSMEM_Available() >> 4 );
1053 case 0x0101: /* Free DOS memory block */
1054 TRACE( "free DOS memory block (0x%04x)\n", DX_reg(context) );
1056 WORD error = GlobalDOSFree16( DX_reg(context) );
1058 SET_AX( context, 0x0009 ); /* memory block address invalid */
1059 SET_CFLAG( context );
1064 case 0x0102: /* Resize DOS Memory Block */
1065 FIXME( "resize DOS memory block (0x%04x, 0x%x paragraphs) - unimplemented\n",
1066 DX_reg(context), BX_reg(context) );
1069 case 0x0200: /* get real mode interrupt vector */
1070 TRACE( "get realmode interupt vector (0x%02x)\n",
1073 FARPROC16 proc = DOSVM_GetRMHandler( BL_reg(context) );
1074 SET_CX( context, SELECTOROF(proc) );
1075 SET_DX( context, OFFSETOF(proc) );
1079 case 0x0201: /* set real mode interrupt vector */
1080 TRACE( "set realmode interrupt vector (0x%02x, 0x%04x:0x%04x)\n",
1081 BL_reg(context), CX_reg(context), DX_reg(context) );
1082 DOSVM_SetRMHandler( BL_reg(context),
1083 (FARPROC16)MAKESEGPTR(CX_reg(context), DX_reg(context)) );
1086 case 0x0202: /* Get Processor Exception Handler Vector */
1087 FIXME( "Get Processor Exception Handler Vector (0x%02x)\n",
1089 if (DOSVM_IsDos32())
1091 SET_CX( context, 0 );
1096 SET_CX( context, 0 );
1097 SET_DX( context, 0 );
1101 case 0x0203: /* Set Processor Exception Handler Vector */
1102 FIXME( "Set Processor Exception Handler Vector (0x%02x)\n",
1106 case 0x0204: /* Get protected mode interrupt vector */
1107 TRACE("get protected mode interrupt handler (0x%02x)\n",
1109 if (DOSVM_IsDos32())
1111 FARPROC48 handler = DOSVM_GetPMHandler48( BL_reg(context) );
1112 SET_CX( context, handler.selector );
1113 context->Edx = handler.offset;
1117 FARPROC16 handler = DOSVM_GetPMHandler16( BL_reg(context) );
1118 SET_CX( context, SELECTOROF(handler) );
1119 SET_DX( context, OFFSETOF(handler) );
1123 case 0x0205: /* Set protected mode interrupt vector */
1124 TRACE("set protected mode interrupt handler (0x%02x,0x%04x:0x%08x)\n",
1125 BL_reg(context), CX_reg(context), context->Edx);
1126 if (DOSVM_IsDos32())
1129 handler.selector = CX_reg(context);
1130 handler.offset = context->Edx;
1131 DOSVM_SetPMHandler48( BL_reg(context), handler );
1136 handler = (FARPROC16)MAKESEGPTR( CX_reg(context), DX_reg(context));
1137 DOSVM_SetPMHandler16( BL_reg(context), handler );
1141 case 0x0300: /* Simulate real mode interrupt */
1142 TRACE( "Simulate real mode interrupt %02x.\n", BL_reg(context));
1143 DOSVM_CallRMInt( context );
1146 case 0x0301: /* Call real mode procedure with far return */
1147 TRACE( "Call real mode procedure with far return.\n" );
1148 DOSVM_CallRMProc( context, FALSE );
1151 case 0x0302: /* Call real mode procedure with interrupt return */
1152 TRACE( "Call real mode procedure with interrupt return.\n" );
1153 DOSVM_CallRMProc( context, TRUE );
1156 case 0x0303: /* Allocate Real Mode Callback Address */
1157 TRACE( "Allocate real mode callback address.\n" );
1158 DOSVM_AllocRMCB( context );
1161 case 0x0304: /* Free Real Mode Callback Address */
1162 TRACE( "Free real mode callback address.\n" );
1163 DOSVM_FreeRMCB( context );
1166 case 0x0305: /* Get State Save/Restore Addresses */
1167 TRACE("get state save/restore addresses\n");
1168 /* we probably won't need this kind of state saving */
1169 SET_AX( context, 0 );
1171 /* real mode: just point to the lret */
1172 SET_BX( context, DOSVM_dpmi_segments->wrap_seg );
1173 SET_CX( context, 2 );
1175 /* protected mode: don't have any handler yet... */
1176 /* FIXME: Use DI in 16-bit DPMI and EDI in 32-bit DPMI */
1177 FIXME("no protected-mode dummy state save/restore handler yet\n");
1178 SET_SI( context, 0 );
1182 case 0x0306: /* Get Raw Mode Switch Addresses */
1183 TRACE("get raw mode switch addresses\n");
1185 /* real mode, point to standard DPMI return wrapper */
1186 SET_BX( context, DOSVM_dpmi_segments->wrap_seg );
1187 SET_CX( context, 0 );
1189 /* protected mode, point to DPMI call wrapper */
1190 /* FIXME: Use DI in 16-bit DPMI and EDI in 32-bit DPMI */
1191 /* FIXME: Doesn't work in DPMI32... */
1192 SET_SI( context, DOSVM_dpmi_segments->dpmi_sel );
1193 context->Edi = 8; /* offset of the INT 0x31 call */
1196 case 0x0400: /* Get DPMI version */
1197 TRACE("get DPMI version\n");
1202 SET_AX( context, 0x005a ); /* DPMI version 0.90 */
1203 SET_BX( context, 0x0005 ); /* Flags: 32-bit, virtual memory */
1204 SET_CL( context, si.wProcessorLevel );
1205 SET_DX( context, 0x0870 ); /* Master/slave interrupt controller base */
1209 case 0x0401: /* Get DPMI Capabilities (1.0) */
1210 FIXME( "get dpmi capabilities - unimplemented\n");
1213 case 0x0500: /* Get free memory information */
1214 TRACE("get free memory information\n");
1216 MEMORYSTATUS status;
1218 /* the layout is just the same as MEMMANINFO, but without
1223 DWORD dwLargestFreeBlock;
1224 DWORD dwMaxPagesAvailable;
1225 DWORD dwMaxPagesLockable;
1226 DWORD dwTotalLinearSpace;
1227 DWORD dwTotalUnlockedPages;
1230 DWORD dwFreeLinearSpace;
1231 DWORD dwSwapFilePages;
1233 } *info = CTX_SEG_OFF_TO_LIN( context, context->SegEs, context->Edi );
1235 GlobalMemoryStatus( &status );
1236 info->wPageSize = getpagesize();
1237 info->dwLargestFreeBlock = status.dwAvailVirtual;
1238 info->dwMaxPagesAvailable = info->dwLargestFreeBlock / info->wPageSize;
1239 info->dwMaxPagesLockable = info->dwMaxPagesAvailable;
1240 info->dwTotalLinearSpace = status.dwTotalVirtual / info->wPageSize;
1241 info->dwTotalUnlockedPages = info->dwTotalLinearSpace;
1242 info->dwFreePages = info->dwMaxPagesAvailable;
1243 info->dwTotalPages = info->dwTotalLinearSpace;
1244 info->dwFreeLinearSpace = info->dwMaxPagesAvailable;
1245 info->dwSwapFilePages = status.dwTotalPageFile / info->wPageSize;
1249 case 0x0501: /* Allocate memory block */
1251 DWORD size = MAKELONG( CX_reg(context), BX_reg(context) );
1254 TRACE( "allocate memory block (%d bytes)\n", size );
1256 ptr = DPMI_xalloc( size );
1259 SET_AX( context, 0x8012 ); /* linear memory not available */
1264 SET_BX( context, HIWORD(ptr) );
1265 SET_CX( context, LOWORD(ptr) );
1266 SET_SI( context, HIWORD(ptr) );
1267 SET_DI( context, LOWORD(ptr) );
1272 case 0x0502: /* Free memory block */
1274 DWORD handle = MAKELONG( DI_reg(context), SI_reg(context) );
1275 TRACE( "free memory block (0x%08x)\n", handle );
1276 DPMI_xfree( (void *)handle );
1280 case 0x0503: /* Resize memory block */
1282 DWORD size = MAKELONG( CX_reg(context), BX_reg(context) );
1283 DWORD handle = MAKELONG( DI_reg(context), SI_reg(context) );
1286 TRACE( "resize memory block (0x%08x, %d bytes)\n", handle, size );
1288 ptr = DPMI_xrealloc( (void *)handle, size );
1291 SET_AX( context, 0x8012 ); /* linear memory not available */
1294 SET_BX( context, HIWORD(ptr) );
1295 SET_CX( context, LOWORD(ptr) );
1296 SET_SI( context, HIWORD(ptr) );
1297 SET_DI( context, LOWORD(ptr) );
1302 case 0x0507: /* Set page attributes (1.0) */
1303 FIXME( "set page attributes - unimplemented\n" );
1304 break; /* Just ignore it */
1306 case 0x0600: /* Lock linear region */
1307 TRACE( "lock linear region - ignored (no paging)\n" );
1310 case 0x0601: /* Unlock linear region */
1311 TRACE( "unlock linear region - ignored (no paging)\n" );
1314 case 0x0602: /* Mark real mode region as pageable */
1315 TRACE( "mark real mode region as pageable - ignored (no paging)\n" );
1318 case 0x0603: /* Relock real mode region */
1319 TRACE( "relock real mode region - ignored (no paging)\n" );
1322 case 0x0604: /* Get page size */
1323 TRACE("get pagesize\n");
1324 SET_BX( context, HIWORD(getpagesize()) );
1325 SET_CX( context, LOWORD(getpagesize()) );
1328 case 0x0700: /* Mark pages as paging candidates */
1329 TRACE( "mark pages as paging candidates - ignored (no paging)\n" );
1332 case 0x0701: /* Discard pages */
1333 TRACE( "discard pages - ignored (no paging)\n" );
1336 case 0x0702: /* Mark page as demand-paging candidate */
1337 TRACE( "mark page as demand-paging candidate - ignored (no paging)\n" );
1340 case 0x0703: /* Discard page contents */
1341 TRACE( "discard page contents - ignored (no paging)\n" );
1344 case 0x0800: /* Physical address mapping */
1345 FIXME( "physical address mapping (0x%08x) - unimplemented\n",
1346 MAKELONG(CX_reg(context),BX_reg(context)) );
1349 case 0x0900: /* Get and Disable Virtual Interrupt State */
1350 TRACE( "Get and Disable Virtual Interrupt State: %d\n",
1351 NtCurrentTeb()->dpmi_vif );
1352 SET_AL( context, NtCurrentTeb()->dpmi_vif ? 1 : 0 );
1353 NtCurrentTeb()->dpmi_vif = 0;
1356 case 0x0901: /* Get and Enable Virtual Interrupt State */
1357 TRACE( "Get and Enable Virtual Interrupt State: %d\n",
1358 NtCurrentTeb()->dpmi_vif );
1359 SET_AL( context, NtCurrentTeb()->dpmi_vif ? 1 : 0 );
1360 NtCurrentTeb()->dpmi_vif = 1;
1363 case 0x0902: /* Get Virtual Interrupt State */
1364 TRACE( "Get Virtual Interrupt State: %d\n",
1365 NtCurrentTeb()->dpmi_vif );
1366 SET_AL( context, NtCurrentTeb()->dpmi_vif ? 1 : 0 );
1369 case 0x0e00: /* Get Coprocessor Status (1.0) */
1371 * Return status in AX bits:
1372 * B0 - MPv (MP bit in the virtual MSW/CR0)
1373 * 0 = numeric coprocessor is disabled for this client
1374 * 1 = numeric coprocessor is enabled for this client
1375 * B1 - EMv (EM bit in the virtual MSW/CR0)
1376 * 0 = client is not emulating coprocessor instructions
1377 * 1 = client is emulating coprocessor instructions
1378 * B2 - MPr (MP bit from the actual MSW/CR0)
1379 * 0 = numeric coprocessor is not present
1380 * 1 = numeric coprocessor is present
1381 * B3 - EMr (EM bit from the actual MSW/CR0)
1382 * 0 = host is not emulating coprocessor instructions
1383 * 1 = host is emulating coprocessor instructions
1384 * B4-B7 - coprocessor type
1385 * 00H = no coprocessor
1388 * 04H = 80486 with numeric coprocessor
1389 * 05H-0FH = reserved for future numeric processors
1391 TRACE( "Get Coprocessor Status\n" );
1392 SET_AX( context, 69 ); /* 486, coprocessor present and enabled */
1395 case 0x0e01: /* Set Coprocessor Emulation (1.0) */
1397 * See function 0x0e00.
1398 * BX bit B0 is new value for MPv.
1399 * BX bit B1 is new value for EMv.
1401 if (BX_reg(context) != 1)
1402 FIXME( "Set Coprocessor Emulation to %d - unimplemented\n",
1405 TRACE( "Set Coprocessor Emulation - ignored\n" );
1409 INT_BARF( context, 0x31 );
1410 SET_AX( context, 0x8001 ); /* unsupported function */