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[wine/multimedia.git] / dlls / winedos / int31.c
blob0c5bdc7b2b8a8d6049233d9b20eff63d038d4c8c
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 */
20
21 #include "config.h"
22 #include "wine/port.h"
23
24 #include <stdarg.h>
25
26 #include "windef.h"
27 #include "winbase.h"
28 #include "winternl.h"
29 #include "wine/winbase16.h"
30 #include "wownt32.h"
31 #include "dosexe.h"
32
33 #include "excpt.h"
34 #include "wine/debug.h"
35 #include "wine/exception.h"
36
37 WINE_DEFAULT_DEBUG_CHANNEL(int31);
38
39 /* Structure for real-mode callbacks */
40 typedef struct
41 {
42 DWORD edi;
43 DWORD esi;
44 DWORD ebp;
45 DWORD reserved;
46 DWORD ebx;
47 DWORD edx;
48 DWORD ecx;
49 DWORD eax;
50 WORD fl;
51 WORD es;
52 WORD ds;
53 WORD fs;
54 WORD gs;
55 WORD ip;
56 WORD cs;
57 WORD sp;
58 WORD ss;
59 } REALMODECALL;
60
61 typedef struct tagRMCB {
62 DWORD address;
63 DWORD proc_ofs,proc_sel;
64 DWORD regs_ofs,regs_sel;
65 struct tagRMCB *next;
66 } RMCB;
67
68 static RMCB *FirstRMCB = NULL;
69 static WORD dpmi_flag;
70 static void* lastvalloced = NULL;
71 static BYTE DPMI_retval;
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 * alloc_pm_selector
86 *
87 * Allocate a 64k sized selector corresponding to a real mode segment.
88 */
89 static WORD alloc_pm_selector( WORD seg, unsigned char flags )
90 {
91 WORD sel = wine_ldt_alloc_entries( 1 );
92
93 if (sel)
94 {
95 LDT_ENTRY entry;
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 );
100 }
101 return sel;
102 }
103
104
105 /**********************************************************************
106 * dpmi_exception_handler
107 *
108 * Handle EXCEPTION_VM86_STI exceptions generated
109 * when there are pending asynchronous events.
110 */
111 static LONG WINAPI dpmi_exception_handler(EXCEPTION_POINTERS *eptr)
112 {
113 #ifdef __i386__
114 EXCEPTION_RECORD *rec = eptr->ExceptionRecord;
115 CONTEXT *context = eptr->ContextRecord;
116
117 if (rec->ExceptionCode == EXCEPTION_VM86_STI)
118 {
119 if (ISV86(context))
120 ERR( "Real mode STI caught by protected mode handler!\n" );
121 DOSVM_SendQueuedEvents(context);
122 return EXCEPTION_CONTINUE_EXECUTION;
123 }
124 else if (rec->ExceptionCode == EXCEPTION_VM86_INTx)
125 {
126 if (ISV86(context))
127 ERR( "Real mode INTx caught by protected mode handler!\n" );
128 DPMI_retval = (BYTE)rec->ExceptionInformation[0];
129 return EXCEPTION_EXECUTE_HANDLER;
130 }
131
132 #endif
133 return EXCEPTION_CONTINUE_SEARCH;
134 }
135
136
137 /**********************************************************************
138 * INT_GetRealModeContext
139 */
140 static void INT_GetRealModeContext( REALMODECALL *call, CONTEXT86 *context )
141 {
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;
158 }
159
160
161 /**********************************************************************
162 * INT_SetRealModeContext
163 */
164 static void INT_SetRealModeContext( REALMODECALL *call, CONTEXT86 *context )
165 {
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;
182 }
183
184 /**********************************************************************
185 * DPMI_xalloc
186 * special virtualalloc, allocates linearly monoton growing memory.
187 * (the usual VirtualAlloc does not satisfy that restriction)
188 */
189 static LPVOID DPMI_xalloc( DWORD len )
190 {
191 LPVOID ret;
192 LPVOID oldlastv = lastvalloced;
193
194 if (lastvalloced)
195 {
196 int xflag = 0;
197
198 ret = NULL;
199 while (!ret)
200 {
201 ret = VirtualAlloc( lastvalloced, len,
202 MEM_COMMIT|MEM_RESERVE, PAGE_EXECUTE_READWRITE );
203 if (!ret)
204 lastvalloced = (char *) lastvalloced + 0x10000;
205
206 /* we failed to allocate one in the first round.
207 * try non-linear
208 */
209 if (!xflag && (lastvalloced<oldlastv))
210 {
211 /* wrapped */
212 FIXME( "failed to allocate linearly growing memory (%d bytes), "
213 "using non-linear growing...\n", len );
214 xflag++;
215 }
216
217 /* if we even fail to allocate something in the next
218 * round, return NULL
219 */
220 if ((xflag==1) && (lastvalloced >= oldlastv))
221 xflag++;
222
223 if ((xflag==2) && (lastvalloced < oldlastv)) {
224 FIXME( "failed to allocate any memory of %d bytes!\n", len );
225 return NULL;
226 }
227 }
228 }
229 else
230 {
231 ret = VirtualAlloc( NULL, len,
232 MEM_COMMIT|MEM_RESERVE, PAGE_EXECUTE_READWRITE );
233 }
234
235 lastvalloced = (LPVOID)(((DWORD)ret+len+0xffff)&~0xffff);
236 return ret;
237 }
238
239 /**********************************************************************
240 * DPMI_xfree
241 */
242 static void DPMI_xfree( LPVOID ptr )
243 {
244 VirtualFree( ptr, 0, MEM_RELEASE );
245 }
246
247 /**********************************************************************
248 * DPMI_xrealloc
249 *
250 * FIXME: perhaps we could grow this mapped area...
251 */
252 static LPVOID DPMI_xrealloc( LPVOID ptr, DWORD newsize )
253 {
254 MEMORY_BASIC_INFORMATION mbi;
255 LPVOID newptr;
256
257 newptr = DPMI_xalloc( newsize );
258 if (ptr)
259 {
260 if (!VirtualQuery(ptr,&mbi,sizeof(mbi)))
261 {
262 FIXME( "realloc of DPMI_xallocd region %p?\n", ptr );
263 return NULL;
264 }
265
266 if (mbi.State == MEM_FREE)
267 {
268 FIXME( "realloc of DPMI_xallocd region %p?\n", ptr );
269 return NULL;
270 }
271
272 /* We do not shrink allocated memory. most reallocs
273 * only do grows anyway
274 */
275 if (newsize <= mbi.RegionSize)
276 return ptr;
277
278 memcpy( newptr, ptr, mbi.RegionSize );
279 DPMI_xfree( ptr );
280 }
281
282 return newptr;
283 }
284
285
286 #ifdef __i386__
287
288 void DPMI_CallRMCB32(RMCB *rmcb, UINT16 ss, DWORD esp, UINT16*es, DWORD*edi)
289 #if 0 /* original code, which early gccs puke on */
290 {
291 int _clobber;
292 __asm__ __volatile__(
293 "pushl %%ebp\n"
294 "pushl %%ebx\n"
295 "pushl %%es\n"
296 "pushl %%ds\n"
297 "pushfl\n"
298 "mov %7,%%es\n"
299 "mov %5,%%ds\n"
300 ".byte 0x36, 0xff, 0x18\n" /* lcall *%ss:(%eax) */
301 "popl %%ds\n"
302 "mov %%es,%0\n"
303 "popl %%es\n"
304 "popl %%ebx\n"
305 "popl %%ebp\n"
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) );
310 }
311 #else /* code generated by a gcc new enough */
312 ;
313 __ASM_GLOBAL_FUNC(DPMI_CallRMCB32,
314 "pushl %ebp\n\t"
315 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
316 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
317 "movl %esp,%ebp\n\t"
318 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
319 "pushl %edi\n\t"
320 __ASM_CFI(".cfi_rel_offset %edi,-4\n\t")
321 "pushl %esi\n\t"
322 __ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
323 "movl 0x8(%ebp),%eax\n\t"
324 "movl 0x10(%ebp),%esi\n\t"
325 "movl 0xc(%ebp),%edx\n\t"
326 "movl 0x10(%eax),%ecx\n\t"
327 "movl 0xc(%eax),%edi\n\t"
328 "addl $0x4,%eax\n\t"
329 "pushl %ebp\n\t"
330 "pushl %ebx\n\t"
331 "pushl %es\n\t"
332 "pushl %ds\n\t"
333 "pushfl\n\t"
334 "mov %cx,%es\n\t"
335 "mov %dx,%ds\n\t"
336 ".byte 0x36, 0xff, 0x18\n\t" /* lcall *%ss:(%eax) */
337 "popl %ds\n\t"
338 "mov %es,%dx\n\t"
339 "popl %es\n\t"
340 "popl %ebx\n\t"
341 "popl %ebp\n\t"
342 "movl 0x14(%ebp),%eax\n\t"
343 "movw %dx,(%eax)\n\t"
344 "movl 0x18(%ebp),%edx\n\t"
345 "movl %edi,(%edx)\n\t"
346 "popl %esi\n\t"
347 __ASM_CFI(".cfi_same_value %esi\n\t")
348 "popl %edi\n\t"
349 __ASM_CFI(".cfi_same_value %edi\n\t")
350 "leave\n\t"
351 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
352 __ASM_CFI(".cfi_same_value %ebp\n\t")
353 "ret")
354 #endif
355
356 #endif /* __i386__ */
357
358 /**********************************************************************
359 * DPMI_CallRMCBProc
360 *
361 * This routine does the hard work of calling a callback procedure.
362 */
363 static void DPMI_CallRMCBProc( CONTEXT86 *context, RMCB *rmcb, WORD flag )
364 {
365 DWORD old_vif = get_vm86_teb_info()->dpmi_vif;
366
367 /* Disable virtual interrupts. */
368 get_vm86_teb_info()->dpmi_vif = 0;
369
370 if (wine_ldt_is_system( rmcb->proc_sel )) {
371 /* Wine-internal RMCB, call directly */
372 ((RMCBPROC)rmcb->proc_ofs)(context);
373 } else __TRY {
374 #ifdef __i386__
375 UINT16 ss,es;
376 DWORD esp,edi;
377
378 INT_SetRealModeContext(MapSL(MAKESEGPTR( rmcb->regs_sel, rmcb->regs_ofs )), context);
379 ss = alloc_pm_selector( context->SegSs, WINE_LDT_FLAGS_DATA );
380 esp = context->Esp;
381
382 FIXME("untested!\n");
383
384 /* The called proc ends with an IRET, and takes these parameters:
385 * DS:ESI = pointer to real-mode SS:SP
386 * ES:EDI = pointer to real-mode call structure
387 * It returns:
388 * ES:EDI = pointer to real-mode call structure (may be a copy)
389 * It is the proc's responsibility to change the return CS:IP in the
390 * real-mode call structure. */
391 if (flag & 1) {
392 /* 32-bit DPMI client */
393 DPMI_CallRMCB32(rmcb, ss, esp, &es, &edi);
394 } else {
395 /* 16-bit DPMI client */
396 CONTEXT86 ctx = *context;
397 ctx.SegCs = rmcb->proc_sel;
398 ctx.Eip = rmcb->proc_ofs;
399 ctx.SegDs = ss;
400 ctx.Esi = esp;
401 ctx.SegEs = rmcb->regs_sel;
402 ctx.Edi = rmcb->regs_ofs;
403 /* FIXME: I'm pretty sure this isn't right - should push flags first */
404 WOWCallback16Ex( 0, WCB16_REGS, 0, NULL, (DWORD *)&ctx );
405 es = ctx.SegEs;
406 edi = ctx.Edi;
407 }
408 wine_ldt_free_entries( ss, 1 );
409 INT_GetRealModeContext( MapSL( MAKESEGPTR( es, edi )), context);
410 #else
411 ERR("RMCBs only implemented for i386\n");
412 #endif
413 } __EXCEPT(dpmi_exception_handler) { } __ENDTRY
414
415 /* Restore virtual interrupt flag. */
416 get_vm86_teb_info()->dpmi_vif = old_vif;
417 }
418
419
420 /**********************************************************************
421 * DPMI_CallRMProc
422 *
423 * This routine does the hard work of calling a real mode procedure.
424 */
425 int DPMI_CallRMProc( CONTEXT86 *context, LPWORD stack, int args, int iret )
426 {
427 LPWORD stack16;
428 LPVOID addr = NULL; /* avoid gcc warning */
429 RMCB *CurrRMCB;
430 int alloc = 0, already = 0;
431 BYTE *code;
432
433 TRACE("EAX=%08x EBX=%08x ECX=%08x EDX=%08x\n",
434 context->Eax, context->Ebx, context->Ecx, context->Edx );
435 TRACE("ESI=%08x EDI=%08x ES=%04x DS=%04x CS:IP=%04x:%04x, %d WORD arguments, %s\n",
436 context->Esi, context->Edi, context->SegEs, context->SegDs,
437 context->SegCs, LOWORD(context->Eip), args, iret?"IRET":"FAR" );
438
439 callrmproc_again:
440
441 /* there might be some code that just jumps to RMCBs or the like,
442 in which case following the jumps here might get us to a shortcut */
443 code = CTX_SEG_OFF_TO_LIN(context, context->SegCs, context->Eip);
444 switch (*code) {
445 case 0xe9: /* JMP NEAR */
446 context->Eip += 3 + *(WORD *)(code+1);
447 /* yeah, I know these gotos don't look good... */
448 goto callrmproc_again;
449 case 0xea: /* JMP FAR */
450 context->Eip = *(WORD *)(code+1);
451 context->SegCs = *(WORD *)(code+3);
452 /* ...but since the label is there anyway... */
453 goto callrmproc_again;
454 case 0xeb: /* JMP SHORT */
455 context->Eip += 2 + *(signed char *)(code+1);
456 /* ...because of other gotos below, so... */
457 goto callrmproc_again;
458 }
459
460 /* shortcut for chaining to internal interrupt handlers */
461 if ((context->SegCs == 0xF000) && iret)
462 {
463 DOSVM_CallBuiltinHandler( context, LOWORD(context->Eip)/4 );
464 return 0;
465 }
466
467 /* shortcut for RMCBs */
468 CurrRMCB = FirstRMCB;
469
470 while (CurrRMCB && (HIWORD(CurrRMCB->address) != context->SegCs))
471 CurrRMCB = CurrRMCB->next;
472
473 if (!CurrRMCB && !MZ_Current())
474 {
475 FIXME("DPMI real-mode call using DOS VM task system, not fully tested!\n");
476 TRACE("creating VM86 task\n");
477 MZ_AllocDPMITask();
478 }
479 if (!already) {
480 if (!context->SegSs) {
481 alloc = 1; /* allocate default stack */
482 stack16 = addr = DOSMEM_AllocBlock( 64, (UINT16 *)&(context->SegSs) );
483 context->Esp = 64-2;
484 stack16 += 32-1;
485 if (!addr) {
486 ERR("could not allocate default stack\n");
487 return 1;
488 }
489 } else {
490 stack16 = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp);
491 }
492 context->Esp -= (args + (iret?1:0)) * sizeof(WORD);
493 stack16 -= args;
494 if (args) memcpy(stack16, stack, args*sizeof(WORD) );
495 /* push flags if iret */
496 if (iret) {
497 stack16--; args++;
498 *stack16 = LOWORD(context->EFlags);
499 }
500 /* push return address (return to interrupt wrapper) */
501 *(--stack16) = DOSVM_dpmi_segments->wrap_seg;
502 *(--stack16) = 0;
503 /* adjust stack */
504 context->Esp -= 2*sizeof(WORD);
505 already = 1;
506 }
507
508 if (CurrRMCB) {
509 /* RMCB call, invoke protected-mode handler directly */
510 DPMI_CallRMCBProc(context, CurrRMCB, dpmi_flag);
511 /* check if we returned to where we thought we would */
512 if ((context->SegCs != DOSVM_dpmi_segments->wrap_seg) ||
513 (LOWORD(context->Eip) != 0)) {
514 /* we need to continue at different address in real-mode space,
515 so we need to set it all up for real mode again */
516 goto callrmproc_again;
517 }
518 } else {
519 TRACE("entering real mode...\n");
520 DOSVM_Enter( context );
521 TRACE("returned from real-mode call\n");
522 }
523 if (alloc) DOSMEM_FreeBlock( addr );
524 return 0;
525 }
526
527
528 /**********************************************************************
529 * CallRMInt
530 */
531 static void DOSVM_CallRMInt( CONTEXT86 *context )
532 {
533 CONTEXT86 realmode_ctx;
534 FARPROC16 rm_int = DOSVM_GetRMHandler( BL_reg(context) );
535 REALMODECALL *call = CTX_SEG_OFF_TO_LIN( context,
536 context->SegEs,
537 context->Edi );
538 INT_GetRealModeContext( call, &realmode_ctx );
539
540 /* we need to check if a real-mode program has hooked the interrupt */
541 if (HIWORD(rm_int)!=0xF000) {
542 /* yup, which means we need to switch to real mode... */
543 realmode_ctx.SegCs = HIWORD(rm_int);
544 realmode_ctx.Eip = LOWORD(rm_int);
545 if (DPMI_CallRMProc( &realmode_ctx, NULL, 0, TRUE))
546 SET_CFLAG(context);
547 } else {
548 RESET_CFLAG(context);
549 /* use the IP we have instead of BL_reg, in case some apps
550 decide to move interrupts around for whatever reason... */
551 DOSVM_CallBuiltinHandler( &realmode_ctx, LOWORD(rm_int)/4 );
552 }
553 INT_SetRealModeContext( call, &realmode_ctx );
554 }
555
556
557 /**********************************************************************
558 * CallRMProc
559 */
560 static void DOSVM_CallRMProc( CONTEXT86 *context, int iret )
561 {
562 REALMODECALL *p = CTX_SEG_OFF_TO_LIN( context,
563 context->SegEs,
564 context->Edi );
565 CONTEXT86 context16;
566
567 TRACE("RealModeCall: EAX=%08x EBX=%08x ECX=%08x EDX=%08x\n",
568 p->eax, p->ebx, p->ecx, p->edx);
569 TRACE(" ESI=%08x EDI=%08x ES=%04x DS=%04x CS:IP=%04x:%04x, %d WORD arguments, %s\n",
570 p->esi, p->edi, p->es, p->ds, p->cs, p->ip, CX_reg(context), iret?"IRET":"FAR" );
571
572 if (!(p->cs) && !(p->ip)) { /* remove this check
573 if Int21/6501 case map function
574 has been implemented */
575 SET_CFLAG(context);
576 return;
577 }
578 INT_GetRealModeContext(p, &context16);
579 DPMI_CallRMProc( &context16, ((LPWORD)MapSL(MAKESEGPTR(context->SegSs, LOWORD(context->Esp))))+3,
580 CX_reg(context), iret );
581 INT_SetRealModeContext(p, &context16);
582 }
583
584
585 /* (see dosmem.c, function DOSMEM_InitDPMI) */
586 static void StartPM( CONTEXT86 *context )
587 {
588 UINT16 cs, ss, ds, es;
589 CONTEXT86 pm_ctx;
590 DWORD psp_ofs = (DWORD)(DOSVM_psp<<4);
591 PDB16 *psp = (PDB16 *)psp_ofs;
592 HANDLE16 env_seg = psp->environment;
593 unsigned char selflags = WINE_LDT_FLAGS_DATA;
594
595 RESET_CFLAG(context);
596 dpmi_flag = AX_reg(context);
597 /* our mode switch wrapper have placed the desired CS into DX */
598 cs = alloc_pm_selector( context->Edx, WINE_LDT_FLAGS_CODE );
599 /* due to a flaw in some CPUs (at least mine), it is best to mark stack segments as 32-bit if they
600 can be used in 32-bit code. Otherwise, these CPUs may not set the high word of esp during a
601 ring transition (from kernel code) to the 16-bit stack, and this causes trouble if executing
602 32-bit code using this stack. */
603 if (dpmi_flag & 1) selflags |= WINE_LDT_FLAGS_32BIT;
604 ss = alloc_pm_selector( context->SegSs, selflags );
605 /* do the same for the data segments, just in case */
606 if (context->SegDs == context->SegSs) ds = ss;
607 else ds = alloc_pm_selector( context->SegDs, selflags );
608 es = alloc_pm_selector( DOSVM_psp, selflags );
609 /* convert environment pointer, as the spec says, but we're a bit lazy about the size here... */
610 psp->environment = alloc_pm_selector( env_seg, WINE_LDT_FLAGS_DATA );
611
612 pm_ctx = *context;
613 pm_ctx.SegCs = DOSVM_dpmi_segments->dpmi_sel;
614 /* our mode switch wrapper expects the new CS in DX, and the new SS in AX */
615 pm_ctx.Eax = ss;
616 pm_ctx.Edx = cs;
617 pm_ctx.SegDs = ds;
618 pm_ctx.SegEs = es;
619 pm_ctx.SegFs = wine_get_fs();
620 pm_ctx.SegGs = wine_get_gs();
621 pm_ctx.EFlags &= ~V86_FLAG;
622
623 TRACE("DOS program is now entering %d-bit protected mode\n",
624 DOSVM_IsDos32() ? 32 : 16);
625
626 __TRY
627 {
628 WOWCallback16Ex( 0, WCB16_REGS, 0, NULL, (DWORD *)&pm_ctx );
629 }
630 __EXCEPT(dpmi_exception_handler)
631 {
632 }
633 __ENDTRY
634
635 TRACE( "Protected mode DOS program is terminating\n" );
636
637 /*
638 * FIXME: Instead of calling DOSVM_Exit, we should release all
639 * allocated protected mode resources and call MZ_Exit
640 * using real mode context. See DPMI specification.
641 */
642 DOSVM_Exit( DPMI_retval );
643
644 #if 0
645 wine_ldt_free_entries( psp->environment, 1 );
646 psp->environment = env_seg;
647 wine_ldt_free_entries(es,1);
648 if (ds != ss) wine_ldt_free_entries(ds,1);
649 wine_ldt_free_entries(ss,1);
650 wine_ldt_free_entries(cs,1);
651 #endif
652 }
653
654 static RMCB *DPMI_AllocRMCB( void )
655 {
656 RMCB *NewRMCB = HeapAlloc(GetProcessHeap(), 0, sizeof(RMCB));
657 UINT16 uParagraph;
658
659 if (NewRMCB)
660 {
661 LPVOID RMCBmem = DOSMEM_AllocBlock(4, &uParagraph);
662 LPBYTE p = RMCBmem;
663
664 *p++ = 0xcd; /* RMCB: */
665 *p++ = 0x31; /* int $0x31 */
666 /* it is the called procedure's task to change the return CS:EIP
667 the DPMI 0.9 spec states that if it doesn't, it will be called again */
668 *p++ = 0xeb;
669 *p++ = 0xfc; /* jmp RMCB */
670 NewRMCB->address = MAKELONG(0, uParagraph);
671 NewRMCB->next = FirstRMCB;
672 FirstRMCB = NewRMCB;
673 }
674 return NewRMCB;
675 }
676
677
678 FARPROC16 WINAPI DPMI_AllocInternalRMCB( RMCBPROC proc )
679 {
680 RMCB *NewRMCB = DPMI_AllocRMCB();
681
682 if (NewRMCB) {
683 NewRMCB->proc_ofs = (DWORD)proc;
684 NewRMCB->proc_sel = 0;
685 NewRMCB->regs_ofs = 0;
686 NewRMCB->regs_sel = 0;
687 return (FARPROC16)(NewRMCB->address);
688 }
689 return NULL;
690 }
691
692
693 static int DPMI_FreeRMCB( DWORD address )
694 {
695 RMCB *CurrRMCB = FirstRMCB;
696 RMCB *PrevRMCB = NULL;
697
698 while (CurrRMCB && (CurrRMCB->address != address))
699 {
700 PrevRMCB = CurrRMCB;
701 CurrRMCB = CurrRMCB->next;
702 }
703 if (CurrRMCB)
704 {
705 if (PrevRMCB)
706 PrevRMCB->next = CurrRMCB->next;
707 else
708 FirstRMCB = CurrRMCB->next;
709 DOSMEM_FreeBlock(PTR_REAL_TO_LIN(SELECTOROF(CurrRMCB->address),OFFSETOF(CurrRMCB->address)));
710 HeapFree(GetProcessHeap(), 0, CurrRMCB);
711 return 0;
712 }
713 return 1;
714 }
715
716
717 /**********************************************************************
718 * DOSVM_RawModeSwitchHandler
719 *
720 * DPMI Raw Mode Switch handler
721 */
722 void WINAPI DOSVM_RawModeSwitchHandler( CONTEXT86 *context )
723 {
724 CONTEXT86 rm_ctx;
725 int ret;
726
727 /* initialize real-mode context as per spec */
728 memset(&rm_ctx, 0, sizeof(rm_ctx));
729 rm_ctx.SegDs = AX_reg(context);
730 rm_ctx.SegEs = CX_reg(context);
731 rm_ctx.SegSs = DX_reg(context);
732 rm_ctx.Esp = context->Ebx;
733 rm_ctx.SegCs = SI_reg(context);
734 rm_ctx.Eip = context->Edi;
735 rm_ctx.Ebp = context->Ebp;
736 rm_ctx.SegFs = 0;
737 rm_ctx.SegGs = 0;
738
739 /* Copy interrupt state. */
740 if (get_vm86_teb_info()->dpmi_vif)
741 rm_ctx.EFlags = V86_FLAG | VIF_MASK;
742 else
743 rm_ctx.EFlags = V86_FLAG;
744
745 /* enter real mode again */
746 TRACE("re-entering real mode at %04x:%04x\n",rm_ctx.SegCs,rm_ctx.Eip);
747 ret = DOSVM_Enter( &rm_ctx );
748 /* when the real-mode stuff call its mode switch address,
749 DOSVM_Enter will return and we will continue here */
750
751 if (ret<0) {
752 ERR("Sync lost!\n");
753 /* if the sync was lost, there's no way to recover */
754 ExitProcess(1);
755 }
756
757 /* alter protected-mode context as per spec */
758 context->SegDs = LOWORD(rm_ctx.Eax);
759 context->SegEs = LOWORD(rm_ctx.Ecx);
760 context->SegSs = LOWORD(rm_ctx.Edx);
761 context->Esp = rm_ctx.Ebx;
762 context->SegCs = LOWORD(rm_ctx.Esi);
763 context->Eip = rm_ctx.Edi;
764 context->Ebp = rm_ctx.Ebp;
765 context->SegFs = 0;
766 context->SegGs = 0;
767
768 /* Copy interrupt state. */
769 if (rm_ctx.EFlags & VIF_MASK)
770 get_vm86_teb_info()->dpmi_vif = 1;
771 else
772 get_vm86_teb_info()->dpmi_vif = 0;
773
774 /* Return to new address and hope that we didn't mess up */
775 TRACE("re-entering protected mode at %04x:%08x\n",
776 context->SegCs, context->Eip);
777 }
778
779
780 /**********************************************************************
781 * AllocRMCB
782 */
783 static void DOSVM_AllocRMCB( CONTEXT86 *context )
784 {
785 RMCB *NewRMCB = DPMI_AllocRMCB();
786
787 TRACE("Function to call: %04x:%04x\n", (WORD)context->SegDs, SI_reg(context) );
788
789 if (NewRMCB)
790 {
791 NewRMCB->proc_ofs = DOSVM_IsDos32() ? context->Esi : LOWORD(context->Esi);
792 NewRMCB->proc_sel = context->SegDs;
793 NewRMCB->regs_ofs = DOSVM_IsDos32() ? context->Edi : LOWORD(context->Edi);
794 NewRMCB->regs_sel = context->SegEs;
795 SET_CX( context, HIWORD(NewRMCB->address) );
796 SET_DX( context, LOWORD(NewRMCB->address) );
797 }
798 else
799 {
800 SET_AX( context, 0x8015 ); /* callback unavailable */
801 SET_CFLAG(context);
802 }
803 }
804
805
806 /**********************************************************************
807 * FreeRMCB
808 */
809 static void DOSVM_FreeRMCB( CONTEXT86 *context )
810 {
811 FIXME("callback address: %04x:%04x\n",
812 CX_reg(context), DX_reg(context));
813
814 if (DPMI_FreeRMCB(MAKELONG(DX_reg(context), CX_reg(context)))) {
815 SET_AX( context, 0x8024 ); /* invalid callback address */
816 SET_CFLAG(context);
817 }
818 }
819
820
821 /**********************************************************************
822 * DOSVM_CheckWrappers
823 *
824 * Check if this was really a wrapper call instead of an interrupt.
825 */
826 BOOL DOSVM_CheckWrappers( CONTEXT86 *context )
827 {
828 if (context->SegCs==DOSVM_dpmi_segments->dpmi_seg) {
829 /* This is the protected mode switch */
830 StartPM(context);
831 return TRUE;
832 }
833 else if (context->SegCs==DOSVM_dpmi_segments->xms_seg)
834 {
835 /* This is the XMS driver entry point */
836 XMS_Handler(context);
837 return TRUE;
838 }
839 else
840 {
841 /* Check for RMCB */
842 RMCB *CurrRMCB = FirstRMCB;
843
844 while (CurrRMCB && (HIWORD(CurrRMCB->address) != context->SegCs))
845 CurrRMCB = CurrRMCB->next;
846
847 if (CurrRMCB) {
848 /* RMCB call, propagate to protected-mode handler */
849 DPMI_CallRMCBProc(context, CurrRMCB, dpmi_flag);
850 return TRUE;
851 }
852 }
853
854 return FALSE;
855 }
856
857 /**********************************************************************
858 * DOSVM_Int31Handler (WINEDOS16.149)
859 *
860 * Handler for int 31h (DPMI).
861 */
862 void WINAPI DOSVM_Int31Handler( CONTEXT86 *context )
863 {
864 RESET_CFLAG(context);
865 switch(AX_reg(context))
866 {
867 case 0x0000: /* Allocate LDT descriptors */
868 TRACE( "allocate LDT descriptors (%d)\n", CX_reg(context) );
869 {
870 WORD sel = AllocSelectorArray16( CX_reg(context) );
871 if(!sel)
872 {
873 TRACE( "failed\n" );
874 SET_AX( context, 0x8011 ); /* descriptor unavailable */
875 SET_CFLAG( context );
876 }
877 else
878 {
879 TRACE( "success, array starts at 0x%04x\n", sel );
880 SET_AX( context, sel );
881 }
882 }
883 break;
884
885 case 0x0001: /* Free LDT descriptor */
886 TRACE( "free LDT descriptor (0x%04x)\n", BX_reg(context) );
887 if (FreeSelector16( BX_reg(context) ))
888 {
889 SET_AX( context, 0x8022 ); /* invalid selector */
890 SET_CFLAG( context );
891 }
892 else
893 {
894 /* If a segment register contains the selector being freed, */
895 /* set it to zero. */
896 if (!((context->SegDs^BX_reg(context)) & ~3)) context->SegDs = 0;
897 if (!((context->SegEs^BX_reg(context)) & ~3)) context->SegEs = 0;
898 if (!((context->SegFs^BX_reg(context)) & ~3)) context->SegFs = 0;
899 if (!((context->SegGs^BX_reg(context)) & ~3)) context->SegGs = 0;
900 }
901 break;
902
903 case 0x0002: /* Real mode segment to descriptor */
904 TRACE( "real mode segment to descriptor (0x%04x)\n", BX_reg(context) );
905 {
906 WORD entryPoint = 0; /* KERNEL entry point for descriptor */
907 switch(BX_reg(context))
908 {
909 case 0x0000: entryPoint = 183; break; /* __0000H */
910 case 0x0040: entryPoint = 193; break; /* __0040H */
911 case 0xa000: entryPoint = 174; break; /* __A000H */
912 case 0xb000: entryPoint = 181; break; /* __B000H */
913 case 0xb800: entryPoint = 182; break; /* __B800H */
914 case 0xc000: entryPoint = 195; break; /* __C000H */
915 case 0xd000: entryPoint = 179; break; /* __D000H */
916 case 0xe000: entryPoint = 190; break; /* __E000H */
917 case 0xf000: entryPoint = 194; break; /* __F000H */
918 default:
919 FIXME("Real mode segment (%x) to descriptor: no longer supported\n",
920 BX_reg(context));
921 SET_CFLAG( context );
922 break;
923 }
924 if (entryPoint)
925 {
926 FARPROC16 proc = GetProcAddress16( GetModuleHandle16( "KERNEL" ),
927 (LPCSTR)(ULONG_PTR)entryPoint );
928 SET_AX( context, LOWORD(proc) );
929 }
930 }
931 break;
932
933 case 0x0003: /* Get next selector increment */
934 TRACE("get selector increment (__AHINCR)\n");
935 context->Eax = __AHINCR;
936 break;
937
938 case 0x0004: /* Lock selector (not supported) */
939 FIXME("lock selector not supported\n");
940 context->Eax = 0; /* FIXME: is this a correct return value? */
941 break;
942
943 case 0x0005: /* Unlock selector (not supported) */
944 FIXME("unlock selector not supported\n");
945 context->Eax = 0; /* FIXME: is this a correct return value? */
946 break;
947
948 case 0x0006: /* Get selector base address */
949 TRACE( "get selector base address (0x%04x)\n", BX_reg(context) );
950 {
951 LDT_ENTRY entry;
952 WORD sel = BX_reg(context);
953 wine_ldt_get_entry( sel, &entry );
954 if (wine_ldt_is_empty(&entry))
955 {
956 context->Eax = 0x8022; /* invalid selector */
957 SET_CFLAG(context);
958 }
959 else
960 {
961 void *base = wine_ldt_get_base(&entry);
962 SET_CX( context, HIWORD(base) );
963 SET_DX( context, LOWORD(base) );
964 }
965 }
966 break;
967
968 case 0x0007: /* Set selector base address */
969 {
970 DWORD base = MAKELONG( DX_reg(context), CX_reg(context) );
971 WORD sel = BX_reg(context);
972 TRACE( "set selector base address (0x%04x,0x%08x)\n", sel, base );
973
974 /* check if Win16 app wants to access lower 64K of DOS memory */
975 if (base < 0x10000 && DOSVM_IsWin16())
976 DOSMEM_MapDosLayout();
977
978 SetSelectorBase( sel, base );
979 }
980 break;
981
982 case 0x0008: /* Set selector limit */
983 {
984 DWORD limit = MAKELONG( DX_reg(context), CX_reg(context) );
985 TRACE( "set selector limit (0x%04x,0x%08x)\n",
986 BX_reg(context), limit );
987 SetSelectorLimit16( BX_reg(context), limit );
988 }
989 break;
990
991 case 0x0009: /* Set selector access rights */
992 TRACE( "set selector access rights(0x%04x,0x%04x)\n",
993 BX_reg(context), CX_reg(context) );
994 SelectorAccessRights16( BX_reg(context), 1, CX_reg(context) );
995 break;
996
997 case 0x000a: /* Allocate selector alias */
998 TRACE( "allocate selector alias (0x%04x)\n", BX_reg(context) );
999 SET_AX( context, AllocCStoDSAlias16( BX_reg(context) ) );
1000 if (!AX_reg(context))
1001 {
1002 SET_AX( context, 0x8011 ); /* descriptor unavailable */
1003 SET_CFLAG(context);
1004 }
1005 break;
1006
1007 case 0x000b: /* Get descriptor */
1008 TRACE( "get descriptor (0x%04x)\n", BX_reg(context) );
1009 {
1010 LDT_ENTRY *entry = CTX_SEG_OFF_TO_LIN( context, context->SegEs,
1011 context->Edi );
1012 wine_ldt_get_entry( BX_reg(context), entry );
1013 }
1014 break;
1015
1016 case 0x000c: /* Set descriptor */
1017 TRACE( "set descriptor (0x%04x)\n", BX_reg(context) );
1018 {
1019 LDT_ENTRY *entry = CTX_SEG_OFF_TO_LIN( context, context->SegEs,
1020 context->Edi );
1021 wine_ldt_set_entry( BX_reg(context), entry );
1022 }
1023 break;
1024
1025 case 0x000d: /* Allocate specific LDT descriptor */
1026 FIXME( "allocate descriptor (0x%04x), stub!\n", BX_reg(context) );
1027 SET_AX( context, 0x8011 ); /* descriptor unavailable */
1028 SET_CFLAG( context );
1029 break;
1030
1031 case 0x000e: /* Get Multiple Descriptors (1.0) */
1032 FIXME( "get multiple descriptors - unimplemented\n" );
1033 break;
1034
1035 case 0x000f: /* Set Multiple Descriptors (1.0) */
1036 FIXME( "set multiple descriptors - unimplemented\n" );
1037 break;
1038
1039 case 0x0100: /* Allocate DOS memory block */
1040 TRACE( "allocate DOS memory block (0x%x paragraphs)\n", BX_reg(context) );
1041 {
1042 DWORD dw = GlobalDOSAlloc16( (DWORD)BX_reg(context) << 4 );
1043 if (dw) {
1044 SET_AX( context, HIWORD(dw) );
1045 SET_DX( context, LOWORD(dw) );
1046 } else {
1047 SET_AX( context, 0x0008 ); /* insufficient memory */
1048 SET_BX( context, DOSMEM_Available() >> 4 );
1049 SET_CFLAG(context);
1050 }
1051 break;
1052 }
1053
1054 case 0x0101: /* Free DOS memory block */
1055 TRACE( "free DOS memory block (0x%04x)\n", DX_reg(context) );
1056 {
1057 WORD error = GlobalDOSFree16( DX_reg(context) );
1058 if (error) {
1059 SET_AX( context, 0x0009 ); /* memory block address invalid */
1060 SET_CFLAG( context );
1061 }
1062 }
1063 break;
1064
1065 case 0x0102: /* Resize DOS Memory Block */
1066 FIXME( "resize DOS memory block (0x%04x, 0x%x paragraphs) - unimplemented\n",
1067 DX_reg(context), BX_reg(context) );
1068 break;
1069
1070 case 0x0200: /* get real mode interrupt vector */
1071 TRACE( "get realmode interrupt vector (0x%02x)\n",
1072 BL_reg(context) );
1073 {
1074 FARPROC16 proc = DOSVM_GetRMHandler( BL_reg(context) );
1075 SET_CX( context, SELECTOROF(proc) );
1076 SET_DX( context, OFFSETOF(proc) );
1077 }
1078 break;
1079
1080 case 0x0201: /* set real mode interrupt vector */
1081 TRACE( "set realmode interrupt vector (0x%02x, 0x%04x:0x%04x)\n",
1082 BL_reg(context), CX_reg(context), DX_reg(context) );
1083 DOSVM_SetRMHandler( BL_reg(context),
1084 (FARPROC16)MAKESEGPTR(CX_reg(context), DX_reg(context)) );
1085 break;
1086
1087 case 0x0202: /* Get Processor Exception Handler Vector */
1088 FIXME( "Get Processor Exception Handler Vector (0x%02x)\n",
1089 BL_reg(context) );
1090 if (DOSVM_IsDos32())
1091 {
1092 SET_CX( context, 0 );
1093 context->Edx = 0;
1094 }
1095 else
1096 {
1097 SET_CX( context, 0 );
1098 SET_DX( context, 0 );
1099 }
1100 break;
1101
1102 case 0x0203: /* Set Processor Exception Handler Vector */
1103 FIXME( "Set Processor Exception Handler Vector (0x%02x)\n",
1104 BL_reg(context) );
1105 break;
1106
1107 case 0x0204: /* Get protected mode interrupt vector */
1108 TRACE("get protected mode interrupt handler (0x%02x)\n",
1109 BL_reg(context));
1110 if (DOSVM_IsDos32())
1111 {
1112 FARPROC48 handler = DOSVM_GetPMHandler48( BL_reg(context) );
1113 SET_CX( context, handler.selector );
1114 context->Edx = handler.offset;
1115 }
1116 else
1117 {
1118 FARPROC16 handler = DOSVM_GetPMHandler16( BL_reg(context) );
1119 SET_CX( context, SELECTOROF(handler) );
1120 SET_DX( context, OFFSETOF(handler) );
1121 }
1122 break;
1123
1124 case 0x0205: /* Set protected mode interrupt vector */
1125 TRACE("set protected mode interrupt handler (0x%02x,0x%04x:0x%08x)\n",
1126 BL_reg(context), CX_reg(context), context->Edx);
1127 if (DOSVM_IsDos32())
1128 {
1129 FARPROC48 handler;
1130 handler.selector = CX_reg(context);
1131 handler.offset = context->Edx;
1132 DOSVM_SetPMHandler48( BL_reg(context), handler );
1133 }
1134 else
1135 {
1136 FARPROC16 handler;
1137 handler = (FARPROC16)MAKESEGPTR( CX_reg(context), DX_reg(context));
1138 DOSVM_SetPMHandler16( BL_reg(context), handler );
1139 }
1140 break;
1141
1142 case 0x0300: /* Simulate real mode interrupt */
1143 TRACE( "Simulate real mode interrupt %02x.\n", BL_reg(context));
1144 DOSVM_CallRMInt( context );
1145 break;
1146
1147 case 0x0301: /* Call real mode procedure with far return */
1148 TRACE( "Call real mode procedure with far return.\n" );
1149 DOSVM_CallRMProc( context, FALSE );
1150 break;
1151
1152 case 0x0302: /* Call real mode procedure with interrupt return */
1153 TRACE( "Call real mode procedure with interrupt return.\n" );
1154 DOSVM_CallRMProc( context, TRUE );
1155 break;
1156
1157 case 0x0303: /* Allocate Real Mode Callback Address */
1158 TRACE( "Allocate real mode callback address.\n" );
1159 DOSVM_AllocRMCB( context );
1160 break;
1161
1162 case 0x0304: /* Free Real Mode Callback Address */
1163 TRACE( "Free real mode callback address.\n" );
1164 DOSVM_FreeRMCB( context );
1165 break;
1166
1167 case 0x0305: /* Get State Save/Restore Addresses */
1168 TRACE("get state save/restore addresses\n");
1169 /* we probably won't need this kind of state saving */
1170 SET_AX( context, 0 );
1171
1172 /* real mode: just point to the lret */
1173 SET_BX( context, DOSVM_dpmi_segments->wrap_seg );
1174 SET_CX( context, 2 );
1175
1176 /* protected mode: don't have any handler yet... */
1177 /* FIXME: Use DI in 16-bit DPMI and EDI in 32-bit DPMI */
1178 FIXME("no protected-mode dummy state save/restore handler yet\n");
1179 SET_SI( context, 0 );
1180 context->Edi = 0;
1181 break;
1182
1183 case 0x0306: /* Get Raw Mode Switch Addresses */
1184 TRACE("get raw mode switch addresses\n");
1185
1186 /* real mode, point to standard DPMI return wrapper */
1187 SET_BX( context, DOSVM_dpmi_segments->wrap_seg );
1188 SET_CX( context, 0 );
1189
1190 /* protected mode, point to DPMI call wrapper */
1191 /* FIXME: Use DI in 16-bit DPMI and EDI in 32-bit DPMI */
1192 /* FIXME: Doesn't work in DPMI32... */
1193 SET_SI( context, DOSVM_dpmi_segments->dpmi_sel );
1194 context->Edi = 8; /* offset of the INT 0x31 call */
1195 break;
1196
1197 case 0x0400: /* Get DPMI version */
1198 TRACE("get DPMI version\n");
1199 {
1200 SYSTEM_INFO si;
1201
1202 GetSystemInfo(&si);
1203 SET_AX( context, 0x005a ); /* DPMI version 0.90 */
1204 SET_BX( context, 0x0005 ); /* Flags: 32-bit, virtual memory */
1205 SET_CL( context, si.wProcessorLevel );
1206 SET_DX( context, 0x0870 ); /* Master/slave interrupt controller base */
1207 }
1208 break;
1209
1210 case 0x0401: /* Get DPMI Capabilities (1.0) */
1211 FIXME( "get dpmi capabilities - unimplemented\n");
1212 break;
1213
1214 case 0x0500: /* Get free memory information */
1215 TRACE("get free memory information\n");
1216 {
1217 MEMORYSTATUS status;
1218
1219 /* the layout is just the same as MEMMANINFO, but without
1220 * the dwSize entry.
1221 */
1222 struct
1223 {
1224 DWORD dwLargestFreeBlock;
1225 DWORD dwMaxPagesAvailable;
1226 DWORD dwMaxPagesLockable;
1227 DWORD dwTotalLinearSpace;
1228 DWORD dwTotalUnlockedPages;
1229 DWORD dwFreePages;
1230 DWORD dwTotalPages;
1231 DWORD dwFreeLinearSpace;
1232 DWORD dwSwapFilePages;
1233 WORD wPageSize;
1234 } *info = CTX_SEG_OFF_TO_LIN( context, context->SegEs, context->Edi );
1235
1236 GlobalMemoryStatus( &status );
1237 info->wPageSize = getpagesize();
1238 info->dwLargestFreeBlock = status.dwAvailVirtual;
1239 info->dwMaxPagesAvailable = info->dwLargestFreeBlock / info->wPageSize;
1240 info->dwMaxPagesLockable = info->dwMaxPagesAvailable;
1241 info->dwTotalLinearSpace = status.dwTotalVirtual / info->wPageSize;
1242 info->dwTotalUnlockedPages = info->dwTotalLinearSpace;
1243 info->dwFreePages = info->dwMaxPagesAvailable;
1244 info->dwTotalPages = info->dwTotalLinearSpace;
1245 info->dwFreeLinearSpace = info->dwMaxPagesAvailable;
1246 info->dwSwapFilePages = status.dwTotalPageFile / info->wPageSize;
1247 break;
1248 }
1249
1250 case 0x0501: /* Allocate memory block */
1251 {
1252 DWORD size = MAKELONG( CX_reg(context), BX_reg(context) );
1253 BYTE *ptr;
1254
1255 TRACE( "allocate memory block (%d bytes)\n", size );
1256
1257 ptr = DPMI_xalloc( size );
1258 if (!ptr)
1259 {
1260 SET_AX( context, 0x8012 ); /* linear memory not available */
1261 SET_CFLAG(context);
1262 }
1263 else
1264 {
1265 SET_BX( context, HIWORD(ptr) );
1266 SET_CX( context, LOWORD(ptr) );
1267 SET_SI( context, HIWORD(ptr) );
1268 SET_DI( context, LOWORD(ptr) );
1269 }
1270 break;
1271 }
1272
1273 case 0x0502: /* Free memory block */
1274 {
1275 DWORD handle = MAKELONG( DI_reg(context), SI_reg(context) );
1276 TRACE( "free memory block (0x%08x)\n", handle );
1277 DPMI_xfree( (void *)handle );
1278 }
1279 break;
1280
1281 case 0x0503: /* Resize memory block */
1282 {
1283 DWORD size = MAKELONG( CX_reg(context), BX_reg(context) );
1284 DWORD handle = MAKELONG( DI_reg(context), SI_reg(context) );
1285 BYTE *ptr;
1286
1287 TRACE( "resize memory block (0x%08x, %d bytes)\n", handle, size );
1288
1289 ptr = DPMI_xrealloc( (void *)handle, size );
1290 if (!ptr)
1291 {
1292 SET_AX( context, 0x8012 ); /* linear memory not available */
1293 SET_CFLAG(context);
1294 } else {
1295 SET_BX( context, HIWORD(ptr) );
1296 SET_CX( context, LOWORD(ptr) );
1297 SET_SI( context, HIWORD(ptr) );
1298 SET_DI( context, LOWORD(ptr) );
1299 }
1300 }
1301 break;
1302
1303 case 0x0507: /* Set page attributes (1.0) */
1304 FIXME( "set page attributes - unimplemented\n" );
1305 break; /* Just ignore it */
1306
1307 case 0x0600: /* Lock linear region */
1308 TRACE( "lock linear region - ignored (no paging)\n" );
1309 break;
1310
1311 case 0x0601: /* Unlock linear region */
1312 TRACE( "unlock linear region - ignored (no paging)\n" );
1313 break;
1314
1315 case 0x0602: /* Mark real mode region as pageable */
1316 TRACE( "mark real mode region as pageable - ignored (no paging)\n" );
1317 break;
1318
1319 case 0x0603: /* Relock real mode region */
1320 TRACE( "relock real mode region - ignored (no paging)\n" );
1321 break;
1322
1323 case 0x0604: /* Get page size */
1324 TRACE("get pagesize\n");
1325 SET_BX( context, HIWORD(getpagesize()) );
1326 SET_CX( context, LOWORD(getpagesize()) );
1327 break;
1328
1329 case 0x0700: /* Mark pages as paging candidates */
1330 TRACE( "mark pages as paging candidates - ignored (no paging)\n" );
1331 break;
1332
1333 case 0x0701: /* Discard pages */
1334 TRACE( "discard pages - ignored (no paging)\n" );
1335 break;
1336
1337 case 0x0702: /* Mark page as demand-paging candidate */
1338 TRACE( "mark page as demand-paging candidate - ignored (no paging)\n" );
1339 break;
1340
1341 case 0x0703: /* Discard page contents */
1342 TRACE( "discard page contents - ignored (no paging)\n" );
1343 break;
1344
1345 case 0x0800: /* Physical address mapping */
1346 FIXME( "physical address mapping (0x%08x) - unimplemented\n",
1347 MAKELONG(CX_reg(context),BX_reg(context)) );
1348 break;
1349
1350 case 0x0900: /* Get and Disable Virtual Interrupt State */
1351 TRACE( "Get and Disable Virtual Interrupt State: %d\n",
1352 get_vm86_teb_info()->dpmi_vif );
1353 SET_AL( context, get_vm86_teb_info()->dpmi_vif ? 1 : 0 );
1354 get_vm86_teb_info()->dpmi_vif = 0;
1355 break;
1356
1357 case 0x0901: /* Get and Enable Virtual Interrupt State */
1358 TRACE( "Get and Enable Virtual Interrupt State: %d\n",
1359 get_vm86_teb_info()->dpmi_vif );
1360 SET_AL( context, get_vm86_teb_info()->dpmi_vif ? 1 : 0 );
1361 get_vm86_teb_info()->dpmi_vif = 1;
1362 break;
1363
1364 case 0x0902: /* Get Virtual Interrupt State */
1365 TRACE( "Get Virtual Interrupt State: %d\n",
1366 get_vm86_teb_info()->dpmi_vif );
1367 SET_AL( context, get_vm86_teb_info()->dpmi_vif ? 1 : 0 );
1368 break;
1369
1370 case 0x0e00: /* Get Coprocessor Status (1.0) */
1371 /*
1372 * Return status in AX bits:
1373 * B0 - MPv (MP bit in the virtual MSW/CR0)
1374 * 0 = numeric coprocessor is disabled for this client
1375 * 1 = numeric coprocessor is enabled for this client
1376 * B1 - EMv (EM bit in the virtual MSW/CR0)
1377 * 0 = client is not emulating coprocessor instructions
1378 * 1 = client is emulating coprocessor instructions
1379 * B2 - MPr (MP bit from the actual MSW/CR0)
1380 * 0 = numeric coprocessor is not present
1381 * 1 = numeric coprocessor is present
1382 * B3 - EMr (EM bit from the actual MSW/CR0)
1383 * 0 = host is not emulating coprocessor instructions
1384 * 1 = host is emulating coprocessor instructions
1385 * B4-B7 - coprocessor type
1386 * 00H = no coprocessor
1387 * 02H = 80287
1388 * 03H = 80387
1389 * 04H = 80486 with numeric coprocessor
1390 * 05H-0FH = reserved for future numeric processors
1391 */
1392 TRACE( "Get Coprocessor Status\n" );
1393 SET_AX( context, 69 ); /* 486, coprocessor present and enabled */
1394 break;
1395
1396 case 0x0e01: /* Set Coprocessor Emulation (1.0) */
1397 /*
1398 * See function 0x0e00.
1399 * BX bit B0 is new value for MPv.
1400 * BX bit B1 is new value for EMv.
1401 */
1402 if (BX_reg(context) != 1)
1403 FIXME( "Set Coprocessor Emulation to %d - unimplemented\n",
1404 BX_reg(context) );
1405 else
1406 TRACE( "Set Coprocessor Emulation - ignored\n" );
1407 break;
1408
1409 default:
1410 INT_BARF( context, 0x31 );
1411 SET_AX( context, 0x8001 ); /* unsupported function */
1412 SET_CFLAG(context);
1413 break;
1414 }
1415 }
Maarten's multimedia branch