?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Extended WOWCallback16Ex to support register functions too. This
[wine/multimedia.git] / dlls / winedos / int31.c
blob421e7c4d3e8941a13a57934077bde9f8390d587e
1 /*
2 * DPMI 0.9 emulation
3 *
4 * Copyright 1995 Alexandre Julliard
5 *
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.
10 *
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.
15 *
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
19 */
20
21 #include "config.h"
22 #include "wine/port.h"
23
24 #include "windef.h"
25 #include "wine/winbase16.h"
26 #include "wownt32.h"
27 #include "miscemu.h"
28 #include "task.h"
29 #include "msdos.h"
30 #include "dosexe.h"
31
32 #include "excpt.h"
33 #include "wine/debug.h"
34 #include "wine/exception.h"
35 #include "stackframe.h"
36 #include "toolhelp.h"
37
38 WINE_DEFAULT_DEBUG_CHANNEL(int31);
39
40 /* Structure for real-mode callbacks */
41 typedef struct
42 {
43 DWORD edi;
44 DWORD esi;
45 DWORD ebp;
46 DWORD reserved;
47 DWORD ebx;
48 DWORD edx;
49 DWORD ecx;
50 DWORD eax;
51 WORD fl;
52 WORD es;
53 WORD ds;
54 WORD fs;
55 WORD gs;
56 WORD ip;
57 WORD cs;
58 WORD sp;
59 WORD ss;
60 } REALMODECALL;
61
62 typedef struct tagRMCB {
63 DWORD address;
64 DWORD proc_ofs,proc_sel;
65 DWORD regs_ofs,regs_sel;
66 struct tagRMCB *next;
67 } RMCB;
68
69 static RMCB *FirstRMCB = NULL;
70 static WORD dpmi_flag;
71 static void* lastvalloced = NULL;
72
73 /**********************************************************************
74 * DOSVM_IsDos32
75 *
76 * Return TRUE if we are in 32-bit protected mode DOS process.
77 */
78 BOOL DOSVM_IsDos32(void)
79 {
80 return (dpmi_flag & 1) ? TRUE : FALSE;
81 }
82
83
84 /**********************************************************************
85 * dpmi_exception_handler
86 *
87 * Handle EXCEPTION_VM86_STI exceptions generated
88 * when there are pending asynchronous events.
89 */
90 static WINE_EXCEPTION_FILTER(dpmi_exception_handler)
91 {
92 #ifdef __i386__
93 EXCEPTION_RECORD *rec = GetExceptionInformation()->ExceptionRecord;
94 CONTEXT *context = GetExceptionInformation()->ContextRecord;
95
96 if (rec->ExceptionCode == EXCEPTION_VM86_STI)
97 {
98 if (ISV86(context))
99 ERR( "Real mode STI caught by protected mode handler!\n" );
100 DOSVM_SendQueuedEvents(context);
101 return EXCEPTION_CONTINUE_EXECUTION;
102 }
103 #endif
104 return EXCEPTION_CONTINUE_SEARCH;
105 }
106
107
108 /**********************************************************************
109 * INT_GetRealModeContext
110 */
111 static void INT_GetRealModeContext( REALMODECALL *call, CONTEXT86 *context )
112 {
113 context->Eax = call->eax;
114 context->Ebx = call->ebx;
115 context->Ecx = call->ecx;
116 context->Edx = call->edx;
117 context->Esi = call->esi;
118 context->Edi = call->edi;
119 context->Ebp = call->ebp;
120 context->EFlags = call->fl | V86_FLAG;
121 context->Eip = call->ip;
122 context->Esp = call->sp;
123 context->SegCs = call->cs;
124 context->SegDs = call->ds;
125 context->SegEs = call->es;
126 context->SegFs = call->fs;
127 context->SegGs = call->gs;
128 context->SegSs = call->ss;
129 }
130
131
132 /**********************************************************************
133 * INT_SetRealModeContext
134 */
135 static void INT_SetRealModeContext( REALMODECALL *call, CONTEXT86 *context )
136 {
137 call->eax = context->Eax;
138 call->ebx = context->Ebx;
139 call->ecx = context->Ecx;
140 call->edx = context->Edx;
141 call->esi = context->Esi;
142 call->edi = context->Edi;
143 call->ebp = context->Ebp;
144 call->fl = LOWORD(context->EFlags);
145 call->ip = LOWORD(context->Eip);
146 call->sp = LOWORD(context->Esp);
147 call->cs = context->SegCs;
148 call->ds = context->SegDs;
149 call->es = context->SegEs;
150 call->fs = context->SegFs;
151 call->gs = context->SegGs;
152 call->ss = context->SegSs;
153 }
154
155 /**********************************************************************
156 * DPMI_xalloc
157 * special virtualalloc, allocates lineary monoton growing memory.
158 * (the usual VirtualAlloc does not satisfy that restriction)
159 */
160 static LPVOID DPMI_xalloc( DWORD len )
161 {
162 LPVOID ret;
163 LPVOID oldlastv = lastvalloced;
164
165 if (lastvalloced)
166 {
167 int xflag = 0;
168
169 ret = NULL;
170 while (!ret)
171 {
172 ret = VirtualAlloc( lastvalloced, len,
173 MEM_COMMIT|MEM_RESERVE, PAGE_EXECUTE_READWRITE );
174 if (!ret)
175 lastvalloced = (char *) lastvalloced + 0x10000;
176
177 /* we failed to allocate one in the first round.
178 * try non-linear
179 */
180 if (!xflag && (lastvalloced<oldlastv))
181 {
182 /* wrapped */
183 FIXME( "failed to allocate linearly growing memory (%ld bytes), "
184 "using non-linear growing...\n", len );
185 xflag++;
186 }
187
188 /* if we even fail to allocate something in the next
189 * round, return NULL
190 */
191 if ((xflag==1) && (lastvalloced >= oldlastv))
192 xflag++;
193
194 if ((xflag==2) && (lastvalloced < oldlastv)) {
195 FIXME( "failed to allocate any memory of %ld bytes!\n", len );
196 return NULL;
197 }
198 }
199 }
200 else
201 {
202 ret = VirtualAlloc( NULL, len,
203 MEM_COMMIT|MEM_RESERVE, PAGE_EXECUTE_READWRITE );
204 }
205
206 lastvalloced = (LPVOID)(((DWORD)ret+len+0xffff)&~0xffff);
207 return ret;
208 }
209
210 /**********************************************************************
211 * DPMI_xfree
212 */
213 static void DPMI_xfree( LPVOID ptr )
214 {
215 VirtualFree( ptr, 0, MEM_RELEASE );
216 }
217
218 /**********************************************************************
219 * DPMI_xrealloc
220 *
221 * FIXME: perhaps we could grow this mapped area...
222 */
223 static LPVOID DPMI_xrealloc( LPVOID ptr, DWORD newsize )
224 {
225 MEMORY_BASIC_INFORMATION mbi;
226 LPVOID newptr;
227
228 newptr = DPMI_xalloc( newsize );
229 if (ptr)
230 {
231 if (!VirtualQuery(ptr,&mbi,sizeof(mbi)))
232 {
233 FIXME( "realloc of DPMI_xallocd region %p?\n", ptr );
234 return NULL;
235 }
236
237 if (mbi.State == MEM_FREE)
238 {
239 FIXME( "realloc of DPMI_xallocd region %p?\n", ptr );
240 return NULL;
241 }
242
243 /* We do not shrink allocated memory. most reallocs
244 * only do grows anyway
245 */
246 if (newsize <= mbi.RegionSize)
247 return ptr;
248
249 memcpy( newptr, ptr, mbi.RegionSize );
250 DPMI_xfree( ptr );
251 }
252
253 return newptr;
254 }
255
256
257 #ifdef __i386__
258
259 void DPMI_CallRMCB32(RMCB *rmcb, UINT16 ss, DWORD esp, UINT16*es, DWORD*edi)
260 #if 0 /* original code, which early gccs puke on */
261 {
262 int _clobber;
263 __asm__ __volatile__(
264 "pushl %%ebp\n"
265 "pushl %%ebx\n"
266 "pushl %%es\n"
267 "pushl %%ds\n"
268 "pushfl\n"
269 "mov %7,%%es\n"
270 "mov %5,%%ds\n"
271 ".byte 0x36, 0xff, 0x18\n" /* lcall *%ss:(%eax) */
272 "popl %%ds\n"
273 "mov %%es,%0\n"
274 "popl %%es\n"
275 "popl %%ebx\n"
276 "popl %%ebp\n"
277 : "=d" (*es), "=D" (*edi), "=S" (_clobber), "=a" (_clobber), "=c" (_clobber)
278 : "0" (ss), "2" (esp),
279 "4" (rmcb->regs_sel), "1" (rmcb->regs_ofs),
280 "3" (&rmcb->proc_ofs) );
281 }
282 #else /* code generated by a gcc new enough */
283 ;
284 __ASM_GLOBAL_FUNC(DPMI_CallRMCB32,
285 "pushl %ebp\n\t"
286 "movl %esp,%ebp\n\t"
287 "pushl %edi\n\t"
288 "pushl %esi\n\t"
289 "movl 0x8(%ebp),%eax\n\t"
290 "movl 0x10(%ebp),%esi\n\t"
291 "movl 0xc(%ebp),%edx\n\t"
292 "movl 0x10(%eax),%ecx\n\t"
293 "movl 0xc(%eax),%edi\n\t"
294 "addl $0x4,%eax\n\t"
295 "pushl %ebp\n\t"
296 "pushl %ebx\n\t"
297 "pushl %es\n\t"
298 "pushl %ds\n\t"
299 "pushfl\n\t"
300 "mov %cx,%es\n\t"
301 "mov %dx,%ds\n\t"
302 ".byte 0x36, 0xff, 0x18\n\t" /* lcall *%ss:(%eax) */
303 "popl %ds\n\t"
304 "mov %es,%dx\n\t"
305 "popl %es\n\t"
306 "popl %ebx\n\t"
307 "popl %ebp\n\t"
308 "movl 0x14(%ebp),%eax\n\t"
309 "movw %dx,(%eax)\n\t"
310 "movl 0x18(%ebp),%edx\n\t"
311 "movl %edi,(%edx)\n\t"
312 "popl %esi\n\t"
313 "popl %edi\n\t"
314 "leave\n\t"
315 "ret")
316 #endif
317
318 #endif /* __i386__ */
319
320 /**********************************************************************
321 * DPMI_CallRMCBProc
322 *
323 * This routine does the hard work of calling a callback procedure.
324 */
325 static void DPMI_CallRMCBProc( CONTEXT86 *context, RMCB *rmcb, WORD flag )
326 {
327 DWORD old_vif = NtCurrentTeb()->dpmi_vif;
328
329 /* Disable virtual interrupts. */
330 NtCurrentTeb()->dpmi_vif = 0;
331
332 if (IS_SELECTOR_SYSTEM( rmcb->proc_sel )) {
333 /* Wine-internal RMCB, call directly */
334 ((RMCBPROC)rmcb->proc_ofs)(context);
335 } else __TRY {
336 #ifdef __i386__
337 UINT16 ss,es;
338 DWORD esp,edi;
339
340 INT_SetRealModeContext(MapSL(MAKESEGPTR( rmcb->regs_sel, rmcb->regs_ofs )), context);
341 ss = SELECTOR_AllocBlock( (void *)(context->SegSs<<4), 0x10000, WINE_LDT_FLAGS_DATA );
342 esp = context->Esp;
343
344 FIXME("untested!\n");
345
346 /* The called proc ends with an IRET, and takes these parameters:
347 * DS:ESI = pointer to real-mode SS:SP
348 * ES:EDI = pointer to real-mode call structure
349 * It returns:
350 * ES:EDI = pointer to real-mode call structure (may be a copy)
351 * It is the proc's responsibility to change the return CS:IP in the
352 * real-mode call structure. */
353 if (flag & 1) {
354 /* 32-bit DPMI client */
355 DPMI_CallRMCB32(rmcb, ss, esp, &es, &edi);
356 } else {
357 /* 16-bit DPMI client */
358 CONTEXT86 ctx = *context;
359 ctx.SegCs = rmcb->proc_sel;
360 ctx.Eip = rmcb->proc_ofs;
361 ctx.SegDs = ss;
362 ctx.Esi = esp;
363 ctx.SegEs = rmcb->regs_sel;
364 ctx.Edi = rmcb->regs_ofs;
365 /* FIXME: I'm pretty sure this isn't right - should push flags first */
366 WOWCallback16Ex( 0, WCB16_REGS, 0, NULL, (DWORD *)&context );
367 es = ctx.SegEs;
368 edi = ctx.Edi;
369 }
370 FreeSelector16(ss);
371 INT_GetRealModeContext( MapSL( MAKESEGPTR( es, edi )), context);
372 #else
373 ERR("RMCBs only implemented for i386\n");
374 #endif
375 } __EXCEPT(dpmi_exception_handler) { } __ENDTRY
376
377 /* Restore virtual interrupt flag. */
378 NtCurrentTeb()->dpmi_vif = old_vif;
379 }
380
381
382 /**********************************************************************
383 * DPMI_CallRMProc
384 *
385 * This routine does the hard work of calling a real mode procedure.
386 */
387 int DPMI_CallRMProc( CONTEXT86 *context, LPWORD stack, int args, int iret )
388 {
389 LPWORD stack16;
390 LPVOID addr = NULL; /* avoid gcc warning */
391 RMCB *CurrRMCB;
392 int alloc = 0, already = 0;
393 BYTE *code;
394
395 TRACE("EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n",
396 context->Eax, context->Ebx, context->Ecx, context->Edx );
397 TRACE("ESI=%08lx EDI=%08lx ES=%04lx DS=%04lx CS:IP=%04lx:%04x, %d WORD arguments, %s\n",
398 context->Esi, context->Edi, context->SegEs, context->SegDs,
399 context->SegCs, LOWORD(context->Eip), args, iret?"IRET":"FAR" );
400
401 callrmproc_again:
402
403 /* there might be some code that just jumps to RMCBs or the like,
404 in which case following the jumps here might get us to a shortcut */
405 code = CTX_SEG_OFF_TO_LIN(context, context->SegCs, context->Eip);
406 switch (*code) {
407 case 0xe9: /* JMP NEAR */
408 context->Eip += 3 + *(WORD *)(code+1);
409 /* yeah, I know these gotos don't look good... */
410 goto callrmproc_again;
411 case 0xea: /* JMP FAR */
412 context->Eip = *(WORD *)(code+1);
413 context->SegCs = *(WORD *)(code+3);
414 /* ...but since the label is there anyway... */
415 goto callrmproc_again;
416 case 0xeb: /* JMP SHORT */
417 context->Eip += 2 + *(signed char *)(code+1);
418 /* ...because of other gotos below, so... */
419 goto callrmproc_again;
420 }
421
422 /* shortcut for chaining to internal interrupt handlers */
423 if ((context->SegCs == 0xF000) && iret)
424 {
425 DOSVM_CallBuiltinHandler( context, LOWORD(context->Eip)/4 );
426 return 0;
427 }
428
429 /* shortcut for RMCBs */
430 CurrRMCB = FirstRMCB;
431
432 while (CurrRMCB && (HIWORD(CurrRMCB->address) != context->SegCs))
433 CurrRMCB = CurrRMCB->next;
434
435 if (!CurrRMCB && !MZ_Current())
436 {
437 FIXME("DPMI real-mode call using DOS VM task system, not fully tested!\n");
438 TRACE("creating VM86 task\n");
439 MZ_AllocDPMITask();
440 }
441 if (!already) {
442 if (!context->SegSs) {
443 alloc = 1; /* allocate default stack */
444 stack16 = addr = DOSMEM_GetBlock( 64, (UINT16 *)&(context->SegSs) );
445 context->Esp = 64-2;
446 stack16 += 32-1;
447 if (!addr) {
448 ERR("could not allocate default stack\n");
449 return 1;
450 }
451 } else {
452 stack16 = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp);
453 }
454 context->Esp -= (args + (iret?1:0)) * sizeof(WORD);
455 stack16 -= args;
456 if (args) memcpy(stack16, stack, args*sizeof(WORD) );
457 /* push flags if iret */
458 if (iret) {
459 stack16--; args++;
460 *stack16 = LOWORD(context->EFlags);
461 }
462 /* push return address (return to interrupt wrapper) */
463 *(--stack16) = DOSVM_dpmi_segments->wrap_seg;
464 *(--stack16) = 0;
465 /* adjust stack */
466 context->Esp -= 2*sizeof(WORD);
467 already = 1;
468 }
469
470 if (CurrRMCB) {
471 /* RMCB call, invoke protected-mode handler directly */
472 DPMI_CallRMCBProc(context, CurrRMCB, dpmi_flag);
473 /* check if we returned to where we thought we would */
474 if ((context->SegCs != DOSVM_dpmi_segments->wrap_seg) ||
475 (LOWORD(context->Eip) != 0)) {
476 /* we need to continue at different address in real-mode space,
477 so we need to set it all up for real mode again */
478 goto callrmproc_again;
479 }
480 } else {
481 TRACE("entering real mode...\n");
482 DOSVM_Enter( context );
483 TRACE("returned from real-mode call\n");
484 }
485 if (alloc) DOSMEM_FreeBlock( addr );
486 return 0;
487 }
488
489
490 /**********************************************************************
491 * CallRMInt (WINEDOS.@)
492 */
493 void WINAPI DOSVM_CallRMInt( CONTEXT86 *context )
494 {
495 CONTEXT86 realmode_ctx;
496 FARPROC16 rm_int = DOSVM_GetRMHandler( BL_reg(context) );
497 REALMODECALL *call = CTX_SEG_OFF_TO_LIN( context,
498 context->SegEs,
499 context->Edi );
500 INT_GetRealModeContext( call, &realmode_ctx );
501
502 /* we need to check if a real-mode program has hooked the interrupt */
503 if (HIWORD(rm_int)!=0xF000) {
504 /* yup, which means we need to switch to real mode... */
505 realmode_ctx.SegCs = HIWORD(rm_int);
506 realmode_ctx.Eip = LOWORD(rm_int);
507 if (DPMI_CallRMProc( &realmode_ctx, NULL, 0, TRUE))
508 SET_CFLAG(context);
509 } else {
510 RESET_CFLAG(context);
511 /* use the IP we have instead of BL_reg, in case some apps
512 decide to move interrupts around for whatever reason... */
513 DOSVM_CallBuiltinHandler( &realmode_ctx, LOWORD(rm_int)/4 );
514 }
515 INT_SetRealModeContext( call, &realmode_ctx );
516 }
517
518
519 /**********************************************************************
520 * CallRMProc (WINEDOS.@)
521 */
522 void WINAPI DOSVM_CallRMProc( CONTEXT86 *context, int iret )
523 {
524 REALMODECALL *p = CTX_SEG_OFF_TO_LIN( context,
525 context->SegEs,
526 context->Edi );
527 CONTEXT86 context16;
528
529 TRACE("RealModeCall: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n",
530 p->eax, p->ebx, p->ecx, p->edx);
531 TRACE(" ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x, %d WORD arguments, %s\n",
532 p->esi, p->edi, p->es, p->ds, p->cs, p->ip, CX_reg(context), iret?"IRET":"FAR" );
533
534 if (!(p->cs) && !(p->ip)) { /* remove this check
535 if Int21/6501 case map function
536 has been implemented */
537 SET_CFLAG(context);
538 return;
539 }
540 INT_GetRealModeContext(p, &context16);
541 DPMI_CallRMProc( &context16, ((LPWORD)MapSL(MAKESEGPTR(context->SegSs, LOWORD(context->Esp))))+3,
542 CX_reg(context), iret );
543 INT_SetRealModeContext(p, &context16);
544 }
545
546
547 /* (see dosmem.c, function DOSMEM_InitDPMI) */
548 static void StartPM( CONTEXT86 *context )
549 {
550 UINT16 cs, ss, ds, es;
551 CONTEXT86 pm_ctx;
552 DWORD psp_ofs = (DWORD)(DOSVM_psp<<4);
553 PDB16 *psp = (PDB16 *)psp_ofs;
554 HANDLE16 env_seg = psp->environment;
555 unsigned char selflags = WINE_LDT_FLAGS_DATA;
556
557 RESET_CFLAG(context);
558 dpmi_flag = AX_reg(context);
559 /* our mode switch wrapper have placed the desired CS into DX */
560 cs = SELECTOR_AllocBlock( (void *)(DX_reg(context)<<4), 0x10000, WINE_LDT_FLAGS_CODE );
561 /* due to a flaw in some CPUs (at least mine), it is best to mark stack segments as 32-bit if they
562 can be used in 32-bit code. Otherwise, these CPUs may not set the high word of esp during a
563 ring transition (from kernel code) to the 16-bit stack, and this causes trouble if executing
564 32-bit code using this stack. */
565 if (dpmi_flag & 1) selflags |= WINE_LDT_FLAGS_32BIT;
566 ss = SELECTOR_AllocBlock( (void *)(context->SegSs<<4), 0x10000, selflags );
567 /* do the same for the data segments, just in case */
568 if (context->SegDs == context->SegSs) ds = ss;
569 else ds = SELECTOR_AllocBlock( (void *)(context->SegDs<<4), 0x10000, selflags );
570 es = SELECTOR_AllocBlock( psp, 0x100, selflags );
571 /* convert environment pointer, as the spec says, but we're a bit lazy about the size here... */
572 psp->environment = SELECTOR_AllocBlock( (void *)(env_seg<<4), 0x10000, WINE_LDT_FLAGS_DATA );
573
574 pm_ctx = *context;
575 pm_ctx.SegCs = DOSVM_dpmi_segments->dpmi_sel;
576 /* our mode switch wrapper expects the new CS in DX, and the new SS in AX */
577 pm_ctx.Eax = ss;
578 pm_ctx.Edx = cs;
579 pm_ctx.SegDs = ds;
580 pm_ctx.SegEs = es;
581 pm_ctx.SegFs = 0;
582 pm_ctx.SegGs = 0;
583
584 TRACE("DOS program is now entering %d-bit protected mode\n",
585 DOSVM_IsDos32() ? 32 : 16);
586
587 __TRY
588 {
589 WOWCallback16Ex( 0, WCB16_REGS, 0, NULL, (DWORD *)&pm_ctx );
590 }
591 __EXCEPT(dpmi_exception_handler)
592 {
593 }
594 __ENDTRY
595
596 /* in the current state of affairs, we won't ever actually return here... */
597 /* we should have int21/ah=4c do it someday, though... */
598
599 #if 0
600 FreeSelector16(psp->environment);
601 psp->environment = env_seg;
602 FreeSelector16(es);
603 if (ds != ss) FreeSelector16(ds);
604 FreeSelector16(ss);
605 FreeSelector16(cs);
606 #endif
607 }
608
609 static RMCB *DPMI_AllocRMCB( void )
610 {
611 RMCB *NewRMCB = HeapAlloc(GetProcessHeap(), 0, sizeof(RMCB));
612 UINT16 uParagraph;
613
614 if (NewRMCB)
615 {
616 LPVOID RMCBmem = DOSMEM_GetBlock(4, &uParagraph);
617 LPBYTE p = RMCBmem;
618
619 *p++ = 0xcd; /* RMCB: */
620 *p++ = 0x31; /* int $0x31 */
621 /* it is the called procedure's task to change the return CS:EIP
622 the DPMI 0.9 spec states that if it doesn't, it will be called again */
623 *p++ = 0xeb;
624 *p++ = 0xfc; /* jmp RMCB */
625 NewRMCB->address = MAKELONG(0, uParagraph);
626 NewRMCB->next = FirstRMCB;
627 FirstRMCB = NewRMCB;
628 }
629 return NewRMCB;
630 }
631
632
633 FARPROC16 WINAPI DPMI_AllocInternalRMCB( RMCBPROC proc )
634 {
635 RMCB *NewRMCB = DPMI_AllocRMCB();
636
637 if (NewRMCB) {
638 NewRMCB->proc_ofs = (DWORD)proc;
639 NewRMCB->proc_sel = 0;
640 NewRMCB->regs_ofs = 0;
641 NewRMCB->regs_sel = 0;
642 return (FARPROC16)(NewRMCB->address);
643 }
644 return NULL;
645 }
646
647
648 static int DPMI_FreeRMCB( DWORD address )
649 {
650 RMCB *CurrRMCB = FirstRMCB;
651 RMCB *PrevRMCB = NULL;
652
653 while (CurrRMCB && (CurrRMCB->address != address))
654 {
655 PrevRMCB = CurrRMCB;
656 CurrRMCB = CurrRMCB->next;
657 }
658 if (CurrRMCB)
659 {
660 if (PrevRMCB)
661 PrevRMCB->next = CurrRMCB->next;
662 else
663 FirstRMCB = CurrRMCB->next;
664 DOSMEM_FreeBlock(PTR_REAL_TO_LIN(SELECTOROF(CurrRMCB->address),OFFSETOF(CurrRMCB->address)));
665 HeapFree(GetProcessHeap(), 0, CurrRMCB);
666 return 0;
667 }
668 return 1;
669 }
670
671
672 void WINAPI DPMI_FreeInternalRMCB( FARPROC16 proc )
673 {
674 DPMI_FreeRMCB( (DWORD)proc );
675 }
676
677
678 /**********************************************************************
679 * DOSVM_RawModeSwitchHandler
680 *
681 * DPMI Raw Mode Switch handler
682 */
683 void WINAPI DOSVM_RawModeSwitchHandler( CONTEXT86 *context )
684 {
685 CONTEXT86 rm_ctx;
686 int ret;
687
688 /* initialize real-mode context as per spec */
689 memset(&rm_ctx, 0, sizeof(rm_ctx));
690 rm_ctx.SegDs = AX_reg(context);
691 rm_ctx.SegEs = CX_reg(context);
692 rm_ctx.SegSs = DX_reg(context);
693 rm_ctx.Esp = context->Ebx;
694 rm_ctx.SegCs = SI_reg(context);
695 rm_ctx.Eip = context->Edi;
696 rm_ctx.Ebp = context->Ebp;
697 rm_ctx.SegFs = 0;
698 rm_ctx.SegGs = 0;
699 rm_ctx.EFlags = context->EFlags; /* at least we need the IF flag */
700
701 /* enter real mode again */
702 TRACE("re-entering real mode at %04lx:%04lx\n",rm_ctx.SegCs,rm_ctx.Eip);
703 ret = DOSVM_Enter( &rm_ctx );
704 /* when the real-mode stuff call its mode switch address,
705 DOSVM_Enter will return and we will continue here */
706
707 if (ret<0) {
708 ERR("Sync lost!\n");
709 /* if the sync was lost, there's no way to recover */
710 ExitProcess(1);
711 }
712
713 /* alter protected-mode context as per spec */
714 context->SegDs = LOWORD(rm_ctx.Eax);
715 context->SegEs = LOWORD(rm_ctx.Ecx);
716 context->SegSs = LOWORD(rm_ctx.Edx);
717 context->Esp = rm_ctx.Ebx;
718 context->SegCs = LOWORD(rm_ctx.Esi);
719 context->Eip = rm_ctx.Edi;
720 context->Ebp = rm_ctx.Ebp;
721 context->SegFs = 0;
722 context->SegGs = 0;
723
724 /* Return to new address and hope that we didn't mess up */
725 TRACE("re-entering protected mode at %04lx:%08lx\n",
726 context->SegCs, context->Eip);
727 }
728
729
730 /**********************************************************************
731 * AllocRMCB (WINEDOS.@)
732 */
733 void WINAPI DOSVM_AllocRMCB( CONTEXT86 *context )
734 {
735 RMCB *NewRMCB = DPMI_AllocRMCB();
736
737 TRACE("Function to call: %04x:%04x\n", (WORD)context->SegDs, SI_reg(context) );
738
739 if (NewRMCB)
740 {
741 NewRMCB->proc_ofs = DOSVM_IsDos32() ? context->Esi : LOWORD(context->Esi);
742 NewRMCB->proc_sel = context->SegDs;
743 NewRMCB->regs_ofs = DOSVM_IsDos32() ? context->Edi : LOWORD(context->Edi);
744 NewRMCB->regs_sel = context->SegEs;
745 SET_CX( context, HIWORD(NewRMCB->address) );
746 SET_DX( context, LOWORD(NewRMCB->address) );
747 }
748 else
749 {
750 SET_AX( context, 0x8015 ); /* callback unavailable */
751 SET_CFLAG(context);
752 }
753 }
754
755
756 /**********************************************************************
757 * FreeRMCB (WINEDOS.@)
758 */
759 void WINAPI DOSVM_FreeRMCB( CONTEXT86 *context )
760 {
761 FIXME("callback address: %04x:%04x\n",
762 CX_reg(context), DX_reg(context));
763
764 if (DPMI_FreeRMCB(MAKELONG(DX_reg(context), CX_reg(context)))) {
765 SET_AX( context, 0x8024 ); /* invalid callback address */
766 SET_CFLAG(context);
767 }
768 }
769
770
771 /**********************************************************************
772 * DOSVM_CheckWrappers
773 *
774 * Check if this was really a wrapper call instead of an interrupt.
775 */
776 BOOL DOSVM_CheckWrappers( CONTEXT86 *context )
777 {
778 if (context->SegCs==DOSVM_dpmi_segments->dpmi_seg) {
779 /* This is the protected mode switch */
780 StartPM(context);
781 return TRUE;
782 }
783 else if (context->SegCs==DOSVM_dpmi_segments->xms_seg)
784 {
785 /* This is the XMS driver entry point */
786 XMS_Handler(context);
787 return TRUE;
788 }
789 else
790 {
791 /* Check for RMCB */
792 RMCB *CurrRMCB = FirstRMCB;
793
794 while (CurrRMCB && (HIWORD(CurrRMCB->address) != context->SegCs))
795 CurrRMCB = CurrRMCB->next;
796
797 if (CurrRMCB) {
798 /* RMCB call, propagate to protected-mode handler */
799 DPMI_CallRMCBProc(context, CurrRMCB, dpmi_flag);
800 return TRUE;
801 }
802 }
803
804 return FALSE;
805 }
806
807 /**********************************************************************
808 * DOSVM_Int31Handler (WINEDOS16.149)
809 *
810 * Handler for int 31h (DPMI).
811 */
812 void WINAPI DOSVM_Int31Handler( CONTEXT86 *context )
813 {
814 RESET_CFLAG(context);
815 switch(AX_reg(context))
816 {
817 case 0x0000: /* Allocate LDT descriptors */
818 TRACE( "allocate LDT descriptors (%d)\n", CX_reg(context) );
819 {
820 WORD sel = AllocSelectorArray16( CX_reg(context) );
821 if(!sel)
822 {
823 TRACE( "failed\n" );
824 SET_AX( context, 0x8011 ); /* descriptor unavailable */
825 SET_CFLAG( context );
826 }
827 else
828 {
829 TRACE( "success, array starts at 0x%04x\n", sel );
830 SET_AX( context, sel );
831 }
832 }
833 break;
834
835 case 0x0001: /* Free LDT descriptor */
836 TRACE( "free LDT descriptor (0x%04x)\n", BX_reg(context) );
837 if (FreeSelector16( BX_reg(context) ))
838 {
839 SET_AX( context, 0x8022 ); /* invalid selector */
840 SET_CFLAG( context );
841 }
842 else
843 {
844 /* If a segment register contains the selector being freed, */
845 /* set it to zero. */
846 if (!((context->SegDs^BX_reg(context)) & ~3)) context->SegDs = 0;
847 if (!((context->SegEs^BX_reg(context)) & ~3)) context->SegEs = 0;
848 if (!((context->SegFs^BX_reg(context)) & ~3)) context->SegFs = 0;
849 if (!((context->SegGs^BX_reg(context)) & ~3)) context->SegGs = 0;
850 }
851 break;
852
853 case 0x0002: /* Real mode segment to descriptor */
854 TRACE( "real mode segment to descriptor (0x%04x)\n", BX_reg(context) );
855 {
856 WORD entryPoint = 0; /* KERNEL entry point for descriptor */
857 switch(BX_reg(context))
858 {
859 case 0x0000: entryPoint = 183; break; /* __0000H */
860 case 0x0040: entryPoint = 193; break; /* __0040H */
861 case 0xa000: entryPoint = 174; break; /* __A000H */
862 case 0xb000: entryPoint = 181; break; /* __B000H */
863 case 0xb800: entryPoint = 182; break; /* __B800H */
864 case 0xc000: entryPoint = 195; break; /* __C000H */
865 case 0xd000: entryPoint = 179; break; /* __D000H */
866 case 0xe000: entryPoint = 190; break; /* __E000H */
867 case 0xf000: entryPoint = 194; break; /* __F000H */
868 default:
869 SET_AX( context, DOSMEM_AllocSelector(BX_reg(context)) );
870 break;
871 }
872 if (entryPoint)
873 {
874 FARPROC16 proc = GetProcAddress16( GetModuleHandle16( "KERNEL" ),
875 (LPCSTR)(ULONG_PTR)entryPoint );
876 SET_AX( context, LOWORD(proc) );
877 }
878 }
879 break;
880
881 case 0x0003: /* Get next selector increment */
882 TRACE("get selector increment (__AHINCR)\n");
883 context->Eax = __AHINCR;
884 break;
885
886 case 0x0004: /* Lock selector (not supported) */
887 FIXME("lock selector not supported\n");
888 context->Eax = 0; /* FIXME: is this a correct return value? */
889 break;
890
891 case 0x0005: /* Unlock selector (not supported) */
892 FIXME("unlock selector not supported\n");
893 context->Eax = 0; /* FIXME: is this a correct return value? */
894 break;
895
896 case 0x0006: /* Get selector base address */
897 TRACE( "get selector base address (0x%04x)\n", BX_reg(context) );
898 {
899 LDT_ENTRY entry;
900 WORD sel = BX_reg(context);
901 wine_ldt_get_entry( sel, &entry );
902 if (wine_ldt_is_empty(&entry))
903 {
904 context->Eax = 0x8022; /* invalid selector */
905 SET_CFLAG(context);
906 }
907 else
908 {
909 void *base = wine_ldt_get_base(&entry);
910 SET_CX( context, HIWORD(base) );
911 SET_DX( context, LOWORD(base) );
912 }
913 }
914 break;
915
916 case 0x0007: /* Set selector base address */
917 {
918 DWORD base = MAKELONG( DX_reg(context), CX_reg(context) );
919 WORD sel = BX_reg(context);
920 TRACE( "set selector base address (0x%04x,0x%08lx)\n", sel, base );
921
922 /* check if Win16 app wants to access lower 64K of DOS memory */
923 if (base < 0x10000 && DOSVM_IsWin16())
924 DOSMEM_Init(TRUE);
925
926 SetSelectorBase( sel, base );
927 }
928 break;
929
930 case 0x0008: /* Set selector limit */
931 {
932 DWORD limit = MAKELONG( DX_reg(context), CX_reg(context) );
933 TRACE( "set selector limit (0x%04x,0x%08lx)\n",
934 BX_reg(context), limit );
935 SetSelectorLimit16( BX_reg(context), limit );
936 }
937 break;
938
939 case 0x0009: /* Set selector access rights */
940 TRACE( "set selector access rights(0x%04x,0x%04x)\n",
941 BX_reg(context), CX_reg(context) );
942 SelectorAccessRights16( BX_reg(context), 1, CX_reg(context) );
943 break;
944
945 case 0x000a: /* Allocate selector alias */
946 TRACE( "allocate selector alias (0x%04x)\n", BX_reg(context) );
947 SET_AX( context, AllocCStoDSAlias16( BX_reg(context) ) );
948 if (!AX_reg(context))
949 {
950 SET_AX( context, 0x8011 ); /* descriptor unavailable */
951 SET_CFLAG(context);
952 }
953 break;
954
955 case 0x000b: /* Get descriptor */
956 TRACE( "get descriptor (0x%04x)\n", BX_reg(context) );
957 {
958 LDT_ENTRY *entry = (LDT_ENTRY*)CTX_SEG_OFF_TO_LIN( context,
959 context->SegEs,
960 context->Edi );
961 wine_ldt_get_entry( BX_reg(context), entry );
962 }
963 break;
964
965 case 0x000c: /* Set descriptor */
966 TRACE( "set descriptor (0x%04x)\n", BX_reg(context) );
967 {
968 LDT_ENTRY *entry = (LDT_ENTRY*)CTX_SEG_OFF_TO_LIN( context,
969 context->SegEs,
970 context->Edi );
971 wine_ldt_set_entry( BX_reg(context), entry );
972 }
973 break;
974
975 case 0x000d: /* Allocate specific LDT descriptor */
976 FIXME( "allocate descriptor (0x%04x), stub!\n", BX_reg(context) );
977 SET_AX( context, 0x8011 ); /* descriptor unavailable */
978 SET_CFLAG( context );
979 break;
980
981 case 0x000e: /* Get Multiple Descriptors (1.0) */
982 FIXME( "get multiple descriptors - unimplemented\n" );
983 break;
984
985 case 0x000f: /* Set Multiple Descriptors (1.0) */
986 FIXME( "set multiple descriptors - unimplemented\n" );
987 break;
988
989 case 0x0100: /* Allocate DOS memory block */
990 TRACE( "allocate DOS memory block (0x%x paragraphs)\n", BX_reg(context) );
991 {
992 DWORD dw = GlobalDOSAlloc16( (DWORD)BX_reg(context) << 4 );
993 if (dw) {
994 SET_AX( context, HIWORD(dw) );
995 SET_DX( context, LOWORD(dw) );
996 } else {
997 SET_AX( context, 0x0008 ); /* insufficient memory */
998 SET_BX( context, DOSMEM_Available() >> 4 );
999 SET_CFLAG(context);
1000 }
1001 break;
1002 }
1003
1004 case 0x0101: /* Free DOS memory block */
1005 TRACE( "free DOS memory block (0x%04x)\n", DX_reg(context) );
1006 {
1007 WORD error = GlobalDOSFree16( DX_reg(context) );
1008 if (error) {
1009 SET_AX( context, 0x0009 ); /* memory block address invalid */
1010 SET_CFLAG( context );
1011 }
1012 }
1013 break;
1014
1015 case 0x0102: /* Resize DOS Memory Block */
1016 FIXME( "resize DOS memory block (0x%04x, 0x%x paragraphs) - unimplemented\n",
1017 DX_reg(context), BX_reg(context) );
1018 break;
1019
1020 case 0x0200: /* get real mode interrupt vector */
1021 TRACE( "get realmode interupt vector (0x%02x)\n",
1022 BL_reg(context) );
1023 {
1024 FARPROC16 proc = DOSVM_GetRMHandler( BL_reg(context) );
1025 SET_CX( context, SELECTOROF(proc) );
1026 SET_DX( context, OFFSETOF(proc) );
1027 }
1028 break;
1029
1030 case 0x0201: /* set real mode interrupt vector */
1031 TRACE( "set realmode interrupt vector (0x%02x, 0x%04x:0x%04x)\n",
1032 BL_reg(context), CX_reg(context), DX_reg(context) );
1033 DOSVM_SetRMHandler( BL_reg(context),
1034 (FARPROC16)MAKESEGPTR(CX_reg(context), DX_reg(context)) );
1035 break;
1036
1037 case 0x0202: /* Get Processor Exception Handler Vector */
1038 FIXME( "Get Processor Exception Handler Vector (0x%02x)\n",
1039 BL_reg(context) );
1040 if (DOSVM_IsDos32())
1041 {
1042 SET_CX( context, 0 );
1043 context->Edx = 0;
1044 }
1045 else
1046 {
1047 SET_CX( context, 0 );
1048 SET_DX( context, 0 );
1049 }
1050 break;
1051
1052 case 0x0203: /* Set Processor Exception Handler Vector */
1053 FIXME( "Set Processor Exception Handler Vector (0x%02x)\n",
1054 BL_reg(context) );
1055 break;
1056
1057 case 0x0204: /* Get protected mode interrupt vector */
1058 TRACE("get protected mode interrupt handler (0x%02x)\n",
1059 BL_reg(context));
1060 if (DOSVM_IsDos32())
1061 {
1062 FARPROC48 handler = DOSVM_GetPMHandler48( BL_reg(context) );
1063 SET_CX( context, handler.selector );
1064 context->Edx = handler.offset;
1065 }
1066 else
1067 {
1068 FARPROC16 handler = DOSVM_GetPMHandler16( BL_reg(context) );
1069 SET_CX( context, SELECTOROF(handler) );
1070 SET_DX( context, OFFSETOF(handler) );
1071 }
1072 break;
1073
1074 case 0x0205: /* Set protected mode interrupt vector */
1075 TRACE("set protected mode interrupt handler (0x%02x,0x%04x:0x%08lx)\n",
1076 BL_reg(context), CX_reg(context), context->Edx);
1077 if (DOSVM_IsDos32())
1078 {
1079 FARPROC48 handler;
1080 handler.selector = CX_reg(context);
1081 handler.offset = context->Edx;
1082 DOSVM_SetPMHandler48( BL_reg(context), handler );
1083 }
1084 else
1085 {
1086 FARPROC16 handler;
1087 handler = (FARPROC16)MAKESEGPTR( CX_reg(context), DX_reg(context));
1088 DOSVM_SetPMHandler16( BL_reg(context), handler );
1089 }
1090 break;
1091
1092 case 0x0300: /* Simulate real mode interrupt */
1093 TRACE( "Simulate real mode interrupt %02x.\n", BL_reg(context));
1094 DOSVM_CallRMInt( context );
1095 break;
1096
1097 case 0x0301: /* Call real mode procedure with far return */
1098 TRACE( "Call real mode procedure with far return.\n" );
1099 DOSVM_CallRMProc( context, FALSE );
1100 break;
1101
1102 case 0x0302: /* Call real mode procedure with interrupt return */
1103 TRACE( "Call real mode procedure with interrupt return.\n" );
1104 DOSVM_CallRMProc( context, TRUE );
1105 break;
1106
1107 case 0x0303: /* Allocate Real Mode Callback Address */
1108 TRACE( "Allocate real mode callback address.\n" );
1109 DOSVM_AllocRMCB( context );
1110 break;
1111
1112 case 0x0304: /* Free Real Mode Callback Address */
1113 TRACE( "Free real mode callback address.\n" );
1114 DOSVM_FreeRMCB( context );
1115 break;
1116
1117 case 0x0305: /* Get State Save/Restore Addresses */
1118 TRACE("get state save/restore addresses\n");
1119 /* we probably won't need this kind of state saving */
1120 SET_AX( context, 0 );
1121
1122 /* real mode: just point to the lret */
1123 SET_BX( context, DOSVM_dpmi_segments->wrap_seg );
1124 SET_CX( context, 2 );
1125
1126 /* protected mode: don't have any handler yet... */
1127 /* FIXME: Use DI in 16-bit DPMI and EDI in 32-bit DPMI */
1128 FIXME("no protected-mode dummy state save/restore handler yet\n");
1129 SET_SI( context, 0 );
1130 context->Edi = 0;
1131 break;
1132
1133 case 0x0306: /* Get Raw Mode Switch Addresses */
1134 TRACE("get raw mode switch addresses\n");
1135
1136 /* real mode, point to standard DPMI return wrapper */
1137 SET_BX( context, DOSVM_dpmi_segments->wrap_seg );
1138 SET_CX( context, 0 );
1139
1140 /* protected mode, point to DPMI call wrapper */
1141 /* FIXME: Use DI in 16-bit DPMI and EDI in 32-bit DPMI */
1142 /* FIXME: Doesn't work in DPMI32... */
1143 SET_SI( context, DOSVM_dpmi_segments->dpmi_sel );
1144 context->Edi = 8; /* offset of the INT 0x31 call */
1145 break;
1146
1147 case 0x0400: /* Get DPMI version */
1148 TRACE("get DPMI version\n");
1149 {
1150 SYSTEM_INFO si;
1151
1152 GetSystemInfo(&si);
1153 SET_AX( context, 0x005a ); /* DPMI version 0.90 */
1154 SET_BX( context, 0x0005 ); /* Flags: 32-bit, virtual memory */
1155 SET_CL( context, si.wProcessorLevel );
1156 SET_DX( context, 0x0870 ); /* Master/slave interrupt controller base */
1157 }
1158 break;
1159
1160 case 0x0401: /* Get DPMI Capabilities (1.0) */
1161 FIXME( "get dpmi capabilities - unimplemented\n");
1162 break;
1163
1164 case 0x0500: /* Get free memory information */
1165 TRACE("get free memory information\n");
1166 {
1167 MEMMANINFO mmi;
1168 void *ptr = CTX_SEG_OFF_TO_LIN( context,
1169 context->SegEs,
1170 context->Edi );
1171
1172 mmi.dwSize = sizeof( mmi );
1173 MemManInfo16( &mmi );
1174
1175 /* the layout is just the same as MEMMANINFO, but without
1176 * the dwSize entry.
1177 */
1178 memcpy( ptr, ((char*)&mmi)+4, sizeof(mmi)-4 );
1179 break;
1180 }
1181
1182 case 0x0501: /* Allocate memory block */
1183 {
1184 DWORD size = MAKELONG( CX_reg(context), BX_reg(context) );
1185 BYTE *ptr;
1186
1187 TRACE( "allocate memory block (%ld bytes)\n", size );
1188
1189 ptr = (BYTE *)DPMI_xalloc( size );
1190 if (!ptr)
1191 {
1192 SET_AX( context, 0x8012 ); /* linear memory not available */
1193 SET_CFLAG(context);
1194 }
1195 else
1196 {
1197 SET_BX( context, HIWORD(ptr) );
1198 SET_CX( context, LOWORD(ptr) );
1199 SET_SI( context, HIWORD(ptr) );
1200 SET_DI( context, LOWORD(ptr) );
1201 }
1202 break;
1203 }
1204
1205 case 0x0502: /* Free memory block */
1206 {
1207 DWORD handle = MAKELONG( DI_reg(context), SI_reg(context) );
1208 TRACE( "free memory block (0x%08lx)\n", handle );
1209 DPMI_xfree( (void *)handle );
1210 }
1211 break;
1212
1213 case 0x0503: /* Resize memory block */
1214 {
1215 DWORD size = MAKELONG( CX_reg(context), BX_reg(context) );
1216 DWORD handle = MAKELONG( DI_reg(context), SI_reg(context) );
1217 BYTE *ptr;
1218
1219 TRACE( "resize memory block (0x%08lx, %ld bytes)\n", handle, size );
1220
1221 ptr = (BYTE *)DPMI_xrealloc( (void *)handle, size );
1222 if (!ptr)
1223 {
1224 SET_AX( context, 0x8012 ); /* linear memory not available */
1225 SET_CFLAG(context);
1226 } else {
1227 SET_BX( context, HIWORD(ptr) );
1228 SET_CX( context, LOWORD(ptr) );
1229 SET_SI( context, HIWORD(ptr) );
1230 SET_DI( context, LOWORD(ptr) );
1231 }
1232 }
1233 break;
1234
1235 case 0x0507: /* Set page attributes (1.0) */
1236 FIXME( "set page attributes - unimplemented\n" );
1237 break; /* Just ignore it */
1238
1239 case 0x0600: /* Lock linear region */
1240 TRACE( "lock linear region - ignored (no paging)\n" );
1241 break;
1242
1243 case 0x0601: /* Unlock linear region */
1244 TRACE( "unlock linear region - ignored (no paging)\n" );
1245 break;
1246
1247 case 0x0602: /* Mark real mode region as pageable */
1248 TRACE( "mark real mode region as pageable - ignored (no paging)\n" );
1249 break;
1250
1251 case 0x0603: /* Relock real mode region */
1252 TRACE( "relock real mode region - ignored (no paging)\n" );
1253 break;
1254
1255 case 0x0604: /* Get page size */
1256 TRACE("get pagesize\n");
1257 SET_BX( context, HIWORD(getpagesize()) );
1258 SET_CX( context, LOWORD(getpagesize()) );
1259 break;
1260
1261 case 0x0700: /* Mark pages as paging candidates */
1262 TRACE( "mark pages as paging candidates - ignored (no paging)\n" );
1263 break;
1264
1265 case 0x0701: /* Discard pages */
1266 TRACE( "discard pages - ignored (no paging)\n" );
1267 break;
1268
1269 case 0x0702: /* Mark page as demand-paging candidate */
1270 TRACE( "mark page as demand-paging candidate - ignored (no paging)\n" );
1271 break;
1272
1273 case 0x0703: /* Discard page contents */
1274 TRACE( "discard page contents - ignored (no paging)\n" );
1275 break;
1276
1277 case 0x0800: /* Physical address mapping */
1278 FIXME( "physical address mapping (0x%08lx) - unimplemented\n",
1279 MAKELONG(CX_reg(context),BX_reg(context)) );
1280 break;
1281
1282 case 0x0900: /* Get and Disable Virtual Interrupt State */
1283 TRACE( "Get and Disable Virtual Interrupt State: %ld\n",
1284 NtCurrentTeb()->dpmi_vif );
1285 SET_AL( context, NtCurrentTeb()->dpmi_vif ? 1 : 0 );
1286 NtCurrentTeb()->dpmi_vif = 0;
1287 break;
1288
1289 case 0x0901: /* Get and Enable Virtual Interrupt State */
1290 TRACE( "Get and Enable Virtual Interrupt State: %ld\n",
1291 NtCurrentTeb()->dpmi_vif );
1292 SET_AL( context, NtCurrentTeb()->dpmi_vif ? 1 : 0 );
1293 NtCurrentTeb()->dpmi_vif = 1;
1294 break;
1295
1296 case 0x0902: /* Get Virtual Interrupt State */
1297 TRACE( "Get Virtual Interrupt State: %ld\n",
1298 NtCurrentTeb()->dpmi_vif );
1299 SET_AL( context, NtCurrentTeb()->dpmi_vif ? 1 : 0 );
1300 break;
1301
1302 case 0x0e00: /* Get Coprocessor Status (1.0) */
1303 /*
1304 * Return status in AX bits:
1305 * B0 - MPv (MP bit in the virtual MSW/CR0)
1306 * 0 = numeric coprocessor is disabled for this client
1307 * 1 = numeric coprocessor is enabled for this client
1308 * B1 - EMv (EM bit in the virtual MSW/CR0)
1309 * 0 = client is not emulating coprocessor instructions
1310 * 1 = client is emulating coprocessor instructions
1311 * B2 - MPr (MP bit from the actual MSW/CR0)
1312 * 0 = numeric coprocessor is not present
1313 * 1 = numeric coprocessor is present
1314 * B3 - EMr (EM bit from the actual MSW/CR0)
1315 * 0 = host is not emulating coprocessor instructions
1316 * 1 = host is emulating coprocessor instructions
1317 * B4-B7 - coprocessor type
1318 * 00H = no coprocessor
1319 * 02H = 80287
1320 * 03H = 80387
1321 * 04H = 80486 with numeric coprocessor
1322 * 05H-0FH = reserved for future numeric processors
1323 */
1324 TRACE( "Get Coprocessor Status\n" );
1325 SET_AX( context, 69 ); /* 486, coprocessor present and enabled */
1326 break;
1327
1328 case 0x0e01: /* Set Coprocessor Emulation (1.0) */
1329 /*
1330 * See function 0x0e00.
1331 * BX bit B0 is new value for MPv.
1332 * BX bit B1 is new value for EMv.
1333 */
1334 if (BX_reg(context) != 1)
1335 FIXME( "Set Coprocessor Emulation to %d - unimplemented\n",
1336 BX_reg(context) );
1337 else
1338 TRACE( "Set Coprocessor Emulation - ignored\n" );
1339 break;
1340
1341 default:
1342 INT_BARF( context, 0x31 );
1343 SET_AX( context, 0x8001 ); /* unsupported function */
1344 SET_CFLAG(context);
1345 break;
1346 }
1347 }
Maarten's multimedia branch