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winex11: Create contexts at initialization time to avoid the need for locks.
[wine/multimedia.git] / dlls / krnl386.exe16 / int31.c
blobac9ae1f5815755751370ed8e997b3efc9bcefbe9
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 "kernel16_private.h"
32 #include "dosexe.h"
33
34 #include "excpt.h"
35 #include "wine/debug.h"
36 #include "wine/exception.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 static BYTE DPMI_retval;
73
74 #include "pshpack1.h"
75
76 typedef struct {
77 WORD Handle;
78 DWORD Offset;
79 } MOVEOFS;
80
81 typedef struct {
82 DWORD Length;
83 MOVEOFS Source;
84 MOVEOFS Dest;
85 } MOVESTRUCT;
86
87 #include "poppack.h"
88
89 /**********************************************************************
90 * DOSVM_IsDos32
91 *
92 * Return TRUE if we are in 32-bit protected mode DOS process.
93 */
94 BOOL DOSVM_IsDos32(void)
95 {
96 return (dpmi_flag & 1) != 0;
97 }
98
99
100 /**********************************************************************
101 * alloc_pm_selector
102 *
103 * Allocate a 64k sized selector corresponding to a real mode segment.
104 */
105 static WORD alloc_pm_selector( WORD seg, unsigned char flags )
106 {
107 WORD sel = wine_ldt_alloc_entries( 1 );
108
109 if (sel)
110 {
111 LDT_ENTRY entry;
112 wine_ldt_set_base( &entry, (void *)(seg << 4) );
113 wine_ldt_set_limit( &entry, 0xffff );
114 wine_ldt_set_flags( &entry, flags );
115 wine_ldt_set_entry( sel, &entry );
116 }
117 return sel;
118 }
119
120
121 /**********************************************************************
122 * dpmi_exception_handler
123 *
124 * Handle EXCEPTION_VM86_STI exceptions generated
125 * when there are pending asynchronous events.
126 */
127 static LONG WINAPI dpmi_exception_handler(EXCEPTION_POINTERS *eptr)
128 {
129 EXCEPTION_RECORD *rec = eptr->ExceptionRecord;
130 CONTEXT *context = eptr->ContextRecord;
131
132 if (rec->ExceptionCode == EXCEPTION_VM86_STI)
133 {
134 if (ISV86(context))
135 ERR( "Real mode STI caught by protected mode handler!\n" );
136 DOSVM_SendQueuedEvents(context);
137 return EXCEPTION_CONTINUE_EXECUTION;
138 }
139 else if (rec->ExceptionCode == EXCEPTION_VM86_INTx)
140 {
141 if (ISV86(context))
142 ERR( "Real mode INTx caught by protected mode handler!\n" );
143 DPMI_retval = (BYTE)rec->ExceptionInformation[0];
144 return EXCEPTION_EXECUTE_HANDLER;
145 }
146
147 return EXCEPTION_CONTINUE_SEARCH;
148 }
149
150
151 /**********************************************************************
152 * INT_GetRealModeContext
153 */
154 static void INT_GetRealModeContext( REALMODECALL *call, CONTEXT *context )
155 {
156 context->Eax = call->eax;
157 context->Ebx = call->ebx;
158 context->Ecx = call->ecx;
159 context->Edx = call->edx;
160 context->Esi = call->esi;
161 context->Edi = call->edi;
162 context->Ebp = call->ebp;
163 context->EFlags = call->fl | V86_FLAG;
164 context->Eip = call->ip;
165 context->Esp = call->sp;
166 context->SegCs = call->cs;
167 context->SegDs = call->ds;
168 context->SegEs = call->es;
169 context->SegFs = call->fs;
170 context->SegGs = call->gs;
171 context->SegSs = call->ss;
172 }
173
174
175 /**********************************************************************
176 * INT_SetRealModeContext
177 */
178 static void INT_SetRealModeContext( REALMODECALL *call, CONTEXT *context )
179 {
180 call->eax = context->Eax;
181 call->ebx = context->Ebx;
182 call->ecx = context->Ecx;
183 call->edx = context->Edx;
184 call->esi = context->Esi;
185 call->edi = context->Edi;
186 call->ebp = context->Ebp;
187 call->fl = LOWORD(context->EFlags);
188 call->ip = LOWORD(context->Eip);
189 call->sp = LOWORD(context->Esp);
190 call->cs = context->SegCs;
191 call->ds = context->SegDs;
192 call->es = context->SegEs;
193 call->fs = context->SegFs;
194 call->gs = context->SegGs;
195 call->ss = context->SegSs;
196 }
197
198 /**********************************************************************
199 * DPMI_xalloc
200 * special virtualalloc, allocates linearly monoton growing memory.
201 * (the usual VirtualAlloc does not satisfy that restriction)
202 */
203 static LPVOID DPMI_xalloc( DWORD len )
204 {
205 LPVOID ret;
206 LPVOID oldlastv = lastvalloced;
207
208 if (lastvalloced)
209 {
210 int xflag = 0;
211
212 ret = NULL;
213 while (!ret)
214 {
215 ret = VirtualAlloc( lastvalloced, len,
216 MEM_COMMIT|MEM_RESERVE, PAGE_EXECUTE_READWRITE );
217 if (!ret)
218 lastvalloced = (char *) lastvalloced + 0x10000;
219
220 /* we failed to allocate one in the first round.
221 * try non-linear
222 */
223 if (!xflag && (lastvalloced<oldlastv))
224 {
225 /* wrapped */
226 FIXME( "failed to allocate linearly growing memory (%u bytes), "
227 "using non-linear growing...\n", len );
228 xflag++;
229 }
230
231 /* if we even fail to allocate something in the next
232 * round, return NULL
233 */
234 if ((xflag==1) && (lastvalloced >= oldlastv))
235 xflag++;
236
237 if ((xflag==2) && (lastvalloced < oldlastv)) {
238 FIXME( "failed to allocate any memory of %u bytes!\n", len );
239 return NULL;
240 }
241 }
242 }
243 else
244 {
245 ret = VirtualAlloc( NULL, len,
246 MEM_COMMIT|MEM_RESERVE, PAGE_EXECUTE_READWRITE );
247 }
248
249 lastvalloced = (LPVOID)(((DWORD)ret+len+0xffff)&~0xffff);
250 return ret;
251 }
252
253 /**********************************************************************
254 * DPMI_xfree
255 */
256 static void DPMI_xfree( LPVOID ptr )
257 {
258 VirtualFree( ptr, 0, MEM_RELEASE );
259 }
260
261 /**********************************************************************
262 * DPMI_xrealloc
263 *
264 * FIXME: perhaps we could grow this mapped area...
265 */
266 static LPVOID DPMI_xrealloc( LPVOID ptr, DWORD newsize )
267 {
268 MEMORY_BASIC_INFORMATION mbi;
269
270 if (ptr)
271 {
272 LPVOID newptr;
273
274 if (!VirtualQuery(ptr,&mbi,sizeof(mbi)))
275 {
276 FIXME( "realloc of DPMI_xallocd region %p?\n", ptr );
277 return NULL;
278 }
279
280 if (mbi.State == MEM_FREE)
281 {
282 FIXME( "realloc of DPMI_xallocd region %p?\n", ptr );
283 return NULL;
284 }
285
286 /* We do not shrink allocated memory. most reallocs
287 * only do grows anyway
288 */
289 if (newsize <= mbi.RegionSize)
290 return ptr;
291
292 newptr = DPMI_xalloc( newsize );
293 if (!newptr)
294 return NULL;
295
296 memcpy( newptr, ptr, mbi.RegionSize );
297 DPMI_xfree( ptr );
298
299 return newptr;
300 }
301
302 return DPMI_xalloc( newsize );
303 }
304
305
306 void DPMI_CallRMCB32(RMCB *rmcb, UINT16 ss, DWORD esp, UINT16*es, DWORD*edi)
307 #if 0 /* original code, which early gccs puke on */
308 {
309 int _clobber;
310 __asm__ __volatile__(
311 "pushl %%ebp\n"
312 "pushl %%ebx\n"
313 "pushl %%es\n"
314 "pushl %%ds\n"
315 "pushfl\n"
316 "mov %7,%%es\n"
317 "mov %5,%%ds\n"
318 ".byte 0x36, 0xff, 0x18\n" /* lcall *%ss:(%eax) */
319 "popl %%ds\n"
320 "mov %%es,%0\n"
321 "popl %%es\n"
322 "popl %%ebx\n"
323 "popl %%ebp\n"
324 : "=d" (*es), "=D" (*edi), "=S" (_clobber), "=a" (_clobber), "=c" (_clobber)
325 : "0" (ss), "2" (esp),
326 "4" (rmcb->regs_sel), "1" (rmcb->regs_ofs),
327 "3" (&rmcb->proc_ofs) );
328 }
329 #else /* code generated by a gcc new enough */
330 ;
331 __ASM_GLOBAL_FUNC(DPMI_CallRMCB32,
332 "pushl %ebp\n\t"
333 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
334 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
335 "movl %esp,%ebp\n\t"
336 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
337 "pushl %edi\n\t"
338 __ASM_CFI(".cfi_rel_offset %edi,-4\n\t")
339 "pushl %esi\n\t"
340 __ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
341 "movl 0x8(%ebp),%eax\n\t"
342 "movl 0x10(%ebp),%esi\n\t"
343 "movl 0xc(%ebp),%edx\n\t"
344 "movl 0x10(%eax),%ecx\n\t"
345 "movl 0xc(%eax),%edi\n\t"
346 "addl $0x4,%eax\n\t"
347 "pushl %ebp\n\t"
348 "pushl %ebx\n\t"
349 "pushl %es\n\t"
350 "pushl %ds\n\t"
351 "pushfl\n\t"
352 "mov %cx,%es\n\t"
353 "mov %dx,%ds\n\t"
354 ".byte 0x36, 0xff, 0x18\n\t" /* lcall *%ss:(%eax) */
355 "popl %ds\n\t"
356 "mov %es,%dx\n\t"
357 "popl %es\n\t"
358 "popl %ebx\n\t"
359 "popl %ebp\n\t"
360 "movl 0x14(%ebp),%eax\n\t"
361 "movw %dx,(%eax)\n\t"
362 "movl 0x18(%ebp),%edx\n\t"
363 "movl %edi,(%edx)\n\t"
364 "popl %esi\n\t"
365 __ASM_CFI(".cfi_same_value %esi\n\t")
366 "popl %edi\n\t"
367 __ASM_CFI(".cfi_same_value %edi\n\t")
368 "leave\n\t"
369 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
370 __ASM_CFI(".cfi_same_value %ebp\n\t")
371 "ret")
372 #endif
373
374 /**********************************************************************
375 * DPMI_CallRMCBProc
376 *
377 * This routine does the hard work of calling a callback procedure.
378 */
379 static void DPMI_CallRMCBProc( CONTEXT *context, RMCB *rmcb, WORD flag )
380 {
381 DWORD old_vif = get_vm86_teb_info()->dpmi_vif;
382
383 /* Disable virtual interrupts. */
384 get_vm86_teb_info()->dpmi_vif = 0;
385
386 if (wine_ldt_is_system( rmcb->proc_sel )) {
387 /* Wine-internal RMCB, call directly */
388 ((RMCBPROC)rmcb->proc_ofs)(context);
389 } else __TRY {
390 UINT16 ss,es;
391 DWORD esp,edi;
392
393 INT_SetRealModeContext(MapSL(MAKESEGPTR( rmcb->regs_sel, rmcb->regs_ofs )), context);
394 ss = alloc_pm_selector( context->SegSs, WINE_LDT_FLAGS_DATA );
395 esp = context->Esp;
396
397 FIXME("untested!\n");
398
399 /* The called proc ends with an IRET, and takes these parameters:
400 * DS:ESI = pointer to real-mode SS:SP
401 * ES:EDI = pointer to real-mode call structure
402 * It returns:
403 * ES:EDI = pointer to real-mode call structure (may be a copy)
404 * It is the proc's responsibility to change the return CS:IP in the
405 * real-mode call structure. */
406 if (flag & 1) {
407 /* 32-bit DPMI client */
408 DPMI_CallRMCB32(rmcb, ss, esp, &es, &edi);
409 } else {
410 /* 16-bit DPMI client */
411 CONTEXT ctx = *context;
412 ctx.SegCs = rmcb->proc_sel;
413 ctx.Eip = rmcb->proc_ofs;
414 ctx.SegDs = ss;
415 ctx.Esi = esp;
416 ctx.SegEs = rmcb->regs_sel;
417 ctx.Edi = rmcb->regs_ofs;
418 /* FIXME: I'm pretty sure this isn't right - should push flags first */
419 WOWCallback16Ex( 0, WCB16_REGS, 0, NULL, (DWORD *)&ctx );
420 es = ctx.SegEs;
421 edi = ctx.Edi;
422 }
423 wine_ldt_free_entries( ss, 1 );
424 INT_GetRealModeContext( MapSL( MAKESEGPTR( es, edi )), context);
425 } __EXCEPT(dpmi_exception_handler) { } __ENDTRY
426
427 /* Restore virtual interrupt flag. */
428 get_vm86_teb_info()->dpmi_vif = old_vif;
429 }
430
431
432 /**********************************************************************
433 * DPMI_CallRMProc
434 *
435 * This routine does the hard work of calling a real mode procedure.
436 */
437 int DPMI_CallRMProc( CONTEXT *context, LPWORD stack, int args, int iret )
438 {
439 LPWORD stack16;
440 LPVOID addr = NULL; /* avoid gcc warning */
441 RMCB *CurrRMCB;
442 int alloc = 0, already = 0;
443 BYTE *code;
444
445 TRACE("EAX=%08x EBX=%08x ECX=%08x EDX=%08x\n",
446 context->Eax, context->Ebx, context->Ecx, context->Edx );
447 TRACE("ESI=%08x EDI=%08x ES=%04x DS=%04x CS:IP=%04x:%04x, %d WORD arguments, %s\n",
448 context->Esi, context->Edi, context->SegEs, context->SegDs,
449 context->SegCs, LOWORD(context->Eip), args, iret?"IRET":"FAR" );
450
451 callrmproc_again:
452
453 /* there might be some code that just jumps to RMCBs or the like,
454 in which case following the jumps here might get us to a shortcut */
455 code = CTX_SEG_OFF_TO_LIN(context, context->SegCs, context->Eip);
456 switch (*code) {
457 case 0xe9: /* JMP NEAR */
458 context->Eip += 3 + *(WORD *)(code+1);
459 /* yeah, I know these gotos don't look good... */
460 goto callrmproc_again;
461 case 0xea: /* JMP FAR */
462 context->Eip = *(WORD *)(code+1);
463 context->SegCs = *(WORD *)(code+3);
464 /* ...but since the label is there anyway... */
465 goto callrmproc_again;
466 case 0xeb: /* JMP SHORT */
467 context->Eip += 2 + *(signed char *)(code+1);
468 /* ...because of other gotos below, so... */
469 goto callrmproc_again;
470 }
471
472 /* shortcut for chaining to internal interrupt handlers */
473 if ((context->SegCs == 0xF000) && iret)
474 {
475 DOSVM_CallBuiltinHandler( context, LOWORD(context->Eip)/4 );
476 return 0;
477 }
478
479 /* shortcut for RMCBs */
480 CurrRMCB = FirstRMCB;
481
482 while (CurrRMCB && (HIWORD(CurrRMCB->address) != context->SegCs))
483 CurrRMCB = CurrRMCB->next;
484
485 if (!CurrRMCB && !MZ_Current())
486 {
487 FIXME("DPMI real-mode call using DOS VM task system, not fully tested!\n");
488 TRACE("creating VM86 task\n");
489 MZ_AllocDPMITask();
490 }
491 if (!already) {
492 if (!context->SegSs) {
493 alloc = 1; /* allocate default stack */
494 stack16 = addr = DOSMEM_AllocBlock( 64, (UINT16 *)&(context->SegSs) );
495 context->Esp = 64-2;
496 stack16 += 32-1;
497 if (!addr) {
498 ERR("could not allocate default stack\n");
499 return 1;
500 }
501 } else {
502 stack16 = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp);
503 }
504 context->Esp -= (args + (iret?1:0)) * sizeof(WORD);
505 stack16 -= args;
506 if (args) memcpy(stack16, stack, args*sizeof(WORD) );
507 /* push flags if iret */
508 if (iret) {
509 stack16--; args++;
510 *stack16 = LOWORD(context->EFlags);
511 }
512 /* push return address (return to interrupt wrapper) */
513 *(--stack16) = DOSVM_dpmi_segments->wrap_seg;
514 *(--stack16) = 0;
515 /* adjust stack */
516 context->Esp -= 2*sizeof(WORD);
517 already = 1;
518 }
519
520 if (CurrRMCB) {
521 /* RMCB call, invoke protected-mode handler directly */
522 DPMI_CallRMCBProc(context, CurrRMCB, dpmi_flag);
523 /* check if we returned to where we thought we would */
524 if ((context->SegCs != DOSVM_dpmi_segments->wrap_seg) ||
525 (LOWORD(context->Eip) != 0)) {
526 /* we need to continue at different address in real-mode space,
527 so we need to set it all up for real mode again */
528 goto callrmproc_again;
529 }
530 } else {
531 TRACE("entering real mode...\n");
532 DOSVM_Enter( context );
533 TRACE("returned from real-mode call\n");
534 }
535 if (alloc) DOSMEM_FreeBlock( addr );
536 return 0;
537 }
538
539
540 /**********************************************************************
541 * CallRMInt
542 */
543 static void DOSVM_CallRMInt( CONTEXT *context )
544 {
545 CONTEXT realmode_ctx;
546 FARPROC16 rm_int = DOSVM_GetRMHandler( BL_reg(context) );
547 REALMODECALL *call = CTX_SEG_OFF_TO_LIN( context,
548 context->SegEs,
549 context->Edi );
550 INT_GetRealModeContext( call, &realmode_ctx );
551
552 /* we need to check if a real-mode program has hooked the interrupt */
553 if (HIWORD(rm_int)!=0xF000) {
554 /* yup, which means we need to switch to real mode... */
555 realmode_ctx.SegCs = HIWORD(rm_int);
556 realmode_ctx.Eip = LOWORD(rm_int);
557 if (DPMI_CallRMProc( &realmode_ctx, NULL, 0, TRUE))
558 SET_CFLAG(context);
559 } else {
560 RESET_CFLAG(context);
561 /* use the IP we have instead of BL_reg, in case some apps
562 decide to move interrupts around for whatever reason... */
563 DOSVM_CallBuiltinHandler( &realmode_ctx, LOWORD(rm_int)/4 );
564 }
565 INT_SetRealModeContext( call, &realmode_ctx );
566 }
567
568
569 /**********************************************************************
570 * CallRMProc
571 */
572 static void DOSVM_CallRMProc( CONTEXT *context, int iret )
573 {
574 REALMODECALL *p = CTX_SEG_OFF_TO_LIN( context,
575 context->SegEs,
576 context->Edi );
577 CONTEXT context16;
578
579 TRACE("RealModeCall: EAX=%08x EBX=%08x ECX=%08x EDX=%08x\n",
580 p->eax, p->ebx, p->ecx, p->edx);
581 TRACE(" ESI=%08x EDI=%08x ES=%04x DS=%04x CS:IP=%04x:%04x, %d WORD arguments, %s\n",
582 p->esi, p->edi, p->es, p->ds, p->cs, p->ip, CX_reg(context), iret?"IRET":"FAR" );
583
584 if (!(p->cs) && !(p->ip)) { /* remove this check
585 if Int21/6501 case map function
586 has been implemented */
587 SET_CFLAG(context);
588 return;
589 }
590 INT_GetRealModeContext(p, &context16);
591 DPMI_CallRMProc( &context16, ((LPWORD)MapSL(MAKESEGPTR(context->SegSs, LOWORD(context->Esp))))+3,
592 CX_reg(context), iret );
593 INT_SetRealModeContext(p, &context16);
594 }
595
596
597 /* (see dosmem.c, function DOSMEM_InitDPMI) */
598 static void StartPM( CONTEXT *context )
599 {
600 UINT16 cs, ss, ds, es;
601 CONTEXT pm_ctx;
602 DWORD psp_ofs = (DWORD)(DOSVM_psp<<4);
603 PDB16 *psp = (PDB16 *)psp_ofs;
604 HANDLE16 env_seg = psp->environment;
605 unsigned char selflags = WINE_LDT_FLAGS_DATA;
606
607 RESET_CFLAG(context);
608 dpmi_flag = AX_reg(context);
609 /* our mode switch wrapper have placed the desired CS into DX */
610 cs = alloc_pm_selector( context->Edx, WINE_LDT_FLAGS_CODE );
611 /* due to a flaw in some CPUs (at least mine), it is best to mark stack segments as 32-bit if they
612 can be used in 32-bit code. Otherwise, these CPUs may not set the high word of esp during a
613 ring transition (from kernel code) to the 16-bit stack, and this causes trouble if executing
614 32-bit code using this stack. */
615 if (dpmi_flag & 1) selflags |= WINE_LDT_FLAGS_32BIT;
616 ss = alloc_pm_selector( context->SegSs, selflags );
617 /* do the same for the data segments, just in case */
618 if (context->SegDs == context->SegSs) ds = ss;
619 else ds = alloc_pm_selector( context->SegDs, selflags );
620 es = alloc_pm_selector( DOSVM_psp, selflags );
621 /* convert environment pointer, as the spec says, but we're a bit lazy about the size here... */
622 psp->environment = alloc_pm_selector( env_seg, WINE_LDT_FLAGS_DATA );
623
624 pm_ctx = *context;
625 pm_ctx.SegCs = DOSVM_dpmi_segments->dpmi_sel;
626 /* our mode switch wrapper expects the new CS in DX, and the new SS in AX */
627 pm_ctx.Eax = ss;
628 pm_ctx.Edx = cs;
629 pm_ctx.SegDs = ds;
630 pm_ctx.SegEs = es;
631 pm_ctx.SegFs = wine_get_fs();
632 pm_ctx.SegGs = wine_get_gs();
633 pm_ctx.EFlags &= ~V86_FLAG;
634
635 TRACE("DOS program is now entering %d-bit protected mode\n",
636 DOSVM_IsDos32() ? 32 : 16);
637
638 __TRY
639 {
640 WOWCallback16Ex( 0, WCB16_REGS, 0, NULL, (DWORD *)&pm_ctx );
641 }
642 __EXCEPT(dpmi_exception_handler)
643 {
644 }
645 __ENDTRY
646
647 TRACE( "Protected mode DOS program is terminating\n" );
648
649 /*
650 * FIXME: Instead of calling DOSVM_Exit, we should release all
651 * allocated protected mode resources and call MZ_Exit
652 * using real mode context. See DPMI specification.
653 */
654 DOSVM_Exit( DPMI_retval );
655
656 #if 0
657 wine_ldt_free_entries( psp->environment, 1 );
658 psp->environment = env_seg;
659 wine_ldt_free_entries(es,1);
660 if (ds != ss) wine_ldt_free_entries(ds,1);
661 wine_ldt_free_entries(ss,1);
662 wine_ldt_free_entries(cs,1);
663 #endif
664 }
665
666 static RMCB *DPMI_AllocRMCB( void )
667 {
668 RMCB *NewRMCB = HeapAlloc(GetProcessHeap(), 0, sizeof(RMCB));
669 UINT16 uParagraph;
670
671 if (NewRMCB)
672 {
673 LPVOID RMCBmem = DOSMEM_AllocBlock(4, &uParagraph);
674 LPBYTE p = RMCBmem;
675
676 *p++ = 0xcd; /* RMCB: */
677 *p++ = 0x31; /* int $0x31 */
678 /* it is the called procedure's task to change the return CS:EIP
679 the DPMI 0.9 spec states that if it doesn't, it will be called again */
680 *p++ = 0xeb;
681 *p++ = 0xfc; /* jmp RMCB */
682 NewRMCB->address = MAKELONG(0, uParagraph);
683 NewRMCB->next = FirstRMCB;
684 FirstRMCB = NewRMCB;
685 }
686 return NewRMCB;
687 }
688
689
690 FARPROC16 DPMI_AllocInternalRMCB( RMCBPROC proc )
691 {
692 RMCB *NewRMCB = DPMI_AllocRMCB();
693
694 if (NewRMCB) {
695 NewRMCB->proc_ofs = (DWORD)proc;
696 NewRMCB->proc_sel = 0;
697 NewRMCB->regs_ofs = 0;
698 NewRMCB->regs_sel = 0;
699 return (FARPROC16)(NewRMCB->address);
700 }
701 return NULL;
702 }
703
704
705 static int DPMI_FreeRMCB( DWORD address )
706 {
707 RMCB *CurrRMCB = FirstRMCB;
708 RMCB *PrevRMCB = NULL;
709
710 while (CurrRMCB && (CurrRMCB->address != address))
711 {
712 PrevRMCB = CurrRMCB;
713 CurrRMCB = CurrRMCB->next;
714 }
715 if (CurrRMCB)
716 {
717 if (PrevRMCB)
718 PrevRMCB->next = CurrRMCB->next;
719 else
720 FirstRMCB = CurrRMCB->next;
721 DOSMEM_FreeBlock(PTR_REAL_TO_LIN(SELECTOROF(CurrRMCB->address),OFFSETOF(CurrRMCB->address)));
722 HeapFree(GetProcessHeap(), 0, CurrRMCB);
723 return 0;
724 }
725 return 1;
726 }
727
728
729 /**********************************************************************
730 * DOSVM_RawModeSwitchHandler
731 *
732 * DPMI Raw Mode Switch handler
733 */
734 void WINAPI DOSVM_RawModeSwitchHandler( CONTEXT *context )
735 {
736 CONTEXT rm_ctx;
737 int ret;
738
739 /* initialize real-mode context as per spec */
740 memset(&rm_ctx, 0, sizeof(rm_ctx));
741 rm_ctx.SegDs = AX_reg(context);
742 rm_ctx.SegEs = CX_reg(context);
743 rm_ctx.SegSs = DX_reg(context);
744 rm_ctx.Esp = context->Ebx;
745 rm_ctx.SegCs = SI_reg(context);
746 rm_ctx.Eip = context->Edi;
747 rm_ctx.Ebp = context->Ebp;
748 rm_ctx.SegFs = 0;
749 rm_ctx.SegGs = 0;
750
751 /* Copy interrupt state. */
752 if (get_vm86_teb_info()->dpmi_vif)
753 rm_ctx.EFlags = V86_FLAG | VIF_MASK;
754 else
755 rm_ctx.EFlags = V86_FLAG;
756
757 /* enter real mode again */
758 TRACE("re-entering real mode at %04x:%04x\n",rm_ctx.SegCs,rm_ctx.Eip);
759 ret = DOSVM_Enter( &rm_ctx );
760 /* when the real-mode stuff call its mode switch address,
761 DOSVM_Enter will return and we will continue here */
762
763 if (ret<0) {
764 ERR("Sync lost!\n");
765 /* if the sync was lost, there's no way to recover */
766 ExitProcess(1);
767 }
768
769 /* alter protected-mode context as per spec */
770 context->SegDs = LOWORD(rm_ctx.Eax);
771 context->SegEs = LOWORD(rm_ctx.Ecx);
772 context->SegSs = LOWORD(rm_ctx.Edx);
773 context->Esp = rm_ctx.Ebx;
774 context->SegCs = LOWORD(rm_ctx.Esi);
775 context->Eip = rm_ctx.Edi;
776 context->Ebp = rm_ctx.Ebp;
777 context->SegFs = 0;
778 context->SegGs = 0;
779
780 /* Copy interrupt state. */
781 if (rm_ctx.EFlags & VIF_MASK)
782 get_vm86_teb_info()->dpmi_vif = 1;
783 else
784 get_vm86_teb_info()->dpmi_vif = 0;
785
786 /* Return to new address and hope that we didn't mess up */
787 TRACE("re-entering protected mode at %04x:%08x\n",
788 context->SegCs, context->Eip);
789 }
790
791
792 /**********************************************************************
793 * AllocRMCB
794 */
795 static void DOSVM_AllocRMCB( CONTEXT *context )
796 {
797 RMCB *NewRMCB = DPMI_AllocRMCB();
798
799 TRACE("Function to call: %04x:%04x\n", (WORD)context->SegDs, SI_reg(context) );
800
801 if (NewRMCB)
802 {
803 NewRMCB->proc_ofs = DOSVM_IsDos32() ? context->Esi : LOWORD(context->Esi);
804 NewRMCB->proc_sel = context->SegDs;
805 NewRMCB->regs_ofs = DOSVM_IsDos32() ? context->Edi : LOWORD(context->Edi);
806 NewRMCB->regs_sel = context->SegEs;
807 SET_CX( context, HIWORD(NewRMCB->address) );
808 SET_DX( context, LOWORD(NewRMCB->address) );
809 }
810 else
811 {
812 SET_AX( context, 0x8015 ); /* callback unavailable */
813 SET_CFLAG(context);
814 }
815 }
816
817
818 /**********************************************************************
819 * FreeRMCB
820 */
821 static void DOSVM_FreeRMCB( CONTEXT *context )
822 {
823 FIXME("callback address: %04x:%04x\n",
824 CX_reg(context), DX_reg(context));
825
826 if (DPMI_FreeRMCB(MAKELONG(DX_reg(context), CX_reg(context)))) {
827 SET_AX( context, 0x8024 ); /* invalid callback address */
828 SET_CFLAG(context);
829 }
830 }
831
832
833 static BYTE * XMS_Offset( MOVEOFS *ofs )
834 {
835 if (ofs->Handle) return (BYTE*)GlobalLock16(ofs->Handle)+ofs->Offset;
836 else return PTR_REAL_TO_LIN(SELECTOROF(ofs->Offset),OFFSETOF(ofs->Offset));
837 }
838
839 /**********************************************************************
840 * XMS_Handler
841 */
842 static void XMS_Handler( CONTEXT *context )
843 {
844 switch(AH_reg(context))
845 {
846 case 0x00: /* Get XMS version number */
847 TRACE("get XMS version number\n");
848 SET_AX( context, 0x0200 ); /* 2.0 */
849 SET_BX( context, 0x0000 ); /* internal revision */
850 SET_DX( context, 0x0001 ); /* HMA exists */
851 break;
852 case 0x08: /* Query Free Extended Memory */
853 {
854 MEMORYSTATUS status;
855
856 TRACE("query free extended memory\n");
857 GlobalMemoryStatus( &status );
858 SET_DX( context, status.dwAvailVirtual >> 10 );
859 SET_AX( context, status.dwAvailVirtual >> 10 );
860 TRACE("returning largest %dK, total %dK\n", AX_reg(context), DX_reg(context));
861 }
862 break;
863 case 0x09: /* Allocate Extended Memory Block */
864 TRACE("allocate extended memory block (%dK)\n",
865 DX_reg(context));
866 SET_DX( context, GlobalAlloc16(GMEM_MOVEABLE, (DWORD)DX_reg(context)<<10) );
867 SET_AX( context, DX_reg(context) ? 1 : 0 );
868 if (!DX_reg(context)) SET_BL( context, 0xA0 ); /* out of memory */
869 break;
870 case 0x0a: /* Free Extended Memory Block */
871 TRACE("free extended memory block %04x\n",DX_reg(context));
872 if(!DX_reg(context) || GlobalFree16(DX_reg(context))) {
873 SET_AX( context, 0 ); /* failure */
874 SET_BL( context, 0xa2 ); /* invalid handle */
875 } else
876 SET_AX( context, 1 ); /* success */
877 break;
878 case 0x0b: /* Move Extended Memory Block */
879 {
880 MOVESTRUCT*move=CTX_SEG_OFF_TO_LIN(context,
881 context->SegDs,context->Esi);
882 BYTE*src,*dst;
883 TRACE("move extended memory block\n");
884 src=XMS_Offset(&move->Source);
885 dst=XMS_Offset(&move->Dest);
886 memcpy(dst,src,move->Length);
887 if (move->Source.Handle) GlobalUnlock16(move->Source.Handle);
888 if (move->Dest.Handle) GlobalUnlock16(move->Dest.Handle);
889 break;
890 }
891 case 0x88: /* Query Any Free Extended Memory */
892 {
893 MEMORYSTATUS status;
894 SYSTEM_INFO info;
895
896 TRACE("query any free extended memory\n");
897
898 GlobalMemoryStatus( &status );
899 GetSystemInfo( &info );
900 context->Eax = status.dwAvailVirtual >> 10;
901 context->Edx = status.dwAvailVirtual >> 10;
902 context->Ecx = (DWORD)info.lpMaximumApplicationAddress;
903 SET_BL( context, 0 ); /* No errors. */
904
905 TRACE("returning largest %dK, total %dK, highest 0x%x\n",
906 context->Eax, context->Edx, context->Ecx);
907 }
908 break;
909 default:
910 INT_BARF( context, 0x31 );
911 SET_AX( context, 0x0000 ); /* failure */
912 SET_BL( context, 0x80 ); /* function not implemented */
913 break;
914 }
915 }
916
917
918 /**********************************************************************
919 * DOSVM_CheckWrappers
920 *
921 * Check if this was really a wrapper call instead of an interrupt.
922 */
923 BOOL DOSVM_CheckWrappers( CONTEXT *context )
924 {
925 if (context->SegCs==DOSVM_dpmi_segments->dpmi_seg) {
926 /* This is the protected mode switch */
927 StartPM(context);
928 return TRUE;
929 }
930 else if (context->SegCs==DOSVM_dpmi_segments->xms_seg)
931 {
932 /* This is the XMS driver entry point */
933 XMS_Handler(context);
934 return TRUE;
935 }
936 else
937 {
938 /* Check for RMCB */
939 RMCB *CurrRMCB = FirstRMCB;
940
941 while (CurrRMCB && (HIWORD(CurrRMCB->address) != context->SegCs))
942 CurrRMCB = CurrRMCB->next;
943
944 if (CurrRMCB) {
945 /* RMCB call, propagate to protected-mode handler */
946 DPMI_CallRMCBProc(context, CurrRMCB, dpmi_flag);
947 return TRUE;
948 }
949 }
950
951 return FALSE;
952 }
953
954 /**********************************************************************
955 * DOSVM_Int31Handler
956 *
957 * Handler for int 31h (DPMI).
958 */
959 void WINAPI DOSVM_Int31Handler( CONTEXT *context )
960 {
961 RESET_CFLAG(context);
962 switch(AX_reg(context))
963 {
964 case 0x0000: /* Allocate LDT descriptors */
965 TRACE( "allocate LDT descriptors (%d)\n", CX_reg(context) );
966 {
967 WORD sel = AllocSelectorArray16( CX_reg(context) );
968 if(!sel)
969 {
970 TRACE( "failed\n" );
971 SET_AX( context, 0x8011 ); /* descriptor unavailable */
972 SET_CFLAG( context );
973 }
974 else
975 {
976 TRACE( "success, array starts at 0x%04x\n", sel );
977 SET_AX( context, sel );
978 }
979 }
980 break;
981
982 case 0x0001: /* Free LDT descriptor */
983 TRACE( "free LDT descriptor (0x%04x)\n", BX_reg(context) );
984 if (FreeSelector16( BX_reg(context) ))
985 {
986 SET_AX( context, 0x8022 ); /* invalid selector */
987 SET_CFLAG( context );
988 }
989 else
990 {
991 /* If a segment register contains the selector being freed, */
992 /* set it to zero. */
993 if (!((context->SegDs^BX_reg(context)) & ~3)) context->SegDs = 0;
994 if (!((context->SegEs^BX_reg(context)) & ~3)) context->SegEs = 0;
995 if (!((context->SegFs^BX_reg(context)) & ~3)) context->SegFs = 0;
996 if (!((context->SegGs^BX_reg(context)) & ~3)) context->SegGs = 0;
997 }
998 break;
999
1000 case 0x0002: /* Real mode segment to descriptor */
1001 TRACE( "real mode segment to descriptor (0x%04x)\n", BX_reg(context) );
1002 {
1003 WORD entryPoint = 0; /* KERNEL entry point for descriptor */
1004 switch(BX_reg(context))
1005 {
1006 case 0x0000: entryPoint = 183; break; /* __0000H */
1007 case 0x0040: entryPoint = 193; break; /* __0040H */
1008 case 0xa000: entryPoint = 174; break; /* __A000H */
1009 case 0xb000: entryPoint = 181; break; /* __B000H */
1010 case 0xb800: entryPoint = 182; break; /* __B800H */
1011 case 0xc000: entryPoint = 195; break; /* __C000H */
1012 case 0xd000: entryPoint = 179; break; /* __D000H */
1013 case 0xe000: entryPoint = 190; break; /* __E000H */
1014 case 0xf000: entryPoint = 194; break; /* __F000H */
1015 default:
1016 FIXME("Real mode segment (%x) to descriptor: no longer supported\n",
1017 BX_reg(context));
1018 SET_CFLAG( context );
1019 break;
1020 }
1021 if (entryPoint)
1022 {
1023 FARPROC16 proc = GetProcAddress16( GetModuleHandle16( "KERNEL" ),
1024 (LPCSTR)(ULONG_PTR)entryPoint );
1025 SET_AX( context, LOWORD(proc) );
1026 }
1027 }
1028 break;
1029
1030 case 0x0003: /* Get next selector increment */
1031 TRACE("get selector increment (__AHINCR)\n");
1032 context->Eax = __AHINCR;
1033 break;
1034
1035 case 0x0004: /* Lock selector (not supported) */
1036 FIXME("lock selector not supported\n");
1037 context->Eax = 0; /* FIXME: is this a correct return value? */
1038 break;
1039
1040 case 0x0005: /* Unlock selector (not supported) */
1041 FIXME("unlock selector not supported\n");
1042 context->Eax = 0; /* FIXME: is this a correct return value? */
1043 break;
1044
1045 case 0x0006: /* Get selector base address */
1046 TRACE( "get selector base address (0x%04x)\n", BX_reg(context) );
1047 {
1048 LDT_ENTRY entry;
1049 WORD sel = BX_reg(context);
1050 wine_ldt_get_entry( sel, &entry );
1051 if (wine_ldt_is_empty(&entry))
1052 {
1053 context->Eax = 0x8022; /* invalid selector */
1054 SET_CFLAG(context);
1055 }
1056 else
1057 {
1058 void *base = wine_ldt_get_base(&entry);
1059 SET_CX( context, HIWORD(base) );
1060 SET_DX( context, LOWORD(base) );
1061 }
1062 }
1063 break;
1064
1065 case 0x0007: /* Set selector base address */
1066 {
1067 DWORD base = MAKELONG( DX_reg(context), CX_reg(context) );
1068 WORD sel = BX_reg(context);
1069 TRACE( "set selector base address (0x%04x,0x%08x)\n", sel, base );
1070
1071 /* check if Win16 app wants to access lower 64K of DOS memory */
1072 if (base < 0x10000 && DOSVM_IsWin16())
1073 DOSMEM_MapDosLayout();
1074
1075 SetSelectorBase( sel, base );
1076 }
1077 break;
1078
1079 case 0x0008: /* Set selector limit */
1080 {
1081 DWORD limit = MAKELONG( DX_reg(context), CX_reg(context) );
1082 TRACE( "set selector limit (0x%04x,0x%08x)\n",
1083 BX_reg(context), limit );
1084 SetSelectorLimit16( BX_reg(context), limit );
1085 }
1086 break;
1087
1088 case 0x0009: /* Set selector access rights */
1089 TRACE( "set selector access rights(0x%04x,0x%04x)\n",
1090 BX_reg(context), CX_reg(context) );
1091 SelectorAccessRights16( BX_reg(context), 1, CX_reg(context) );
1092 break;
1093
1094 case 0x000a: /* Allocate selector alias */
1095 TRACE( "allocate selector alias (0x%04x)\n", BX_reg(context) );
1096 SET_AX( context, AllocCStoDSAlias16( BX_reg(context) ) );
1097 if (!AX_reg(context))
1098 {
1099 SET_AX( context, 0x8011 ); /* descriptor unavailable */
1100 SET_CFLAG(context);
1101 }
1102 break;
1103
1104 case 0x000b: /* Get descriptor */
1105 TRACE( "get descriptor (0x%04x)\n", BX_reg(context) );
1106 {
1107 LDT_ENTRY *entry = CTX_SEG_OFF_TO_LIN( context, context->SegEs,
1108 context->Edi );
1109 wine_ldt_get_entry( BX_reg(context), entry );
1110 }
1111 break;
1112
1113 case 0x000c: /* Set descriptor */
1114 TRACE( "set descriptor (0x%04x)\n", BX_reg(context) );
1115 {
1116 LDT_ENTRY *entry = CTX_SEG_OFF_TO_LIN( context, context->SegEs,
1117 context->Edi );
1118 wine_ldt_set_entry( BX_reg(context), entry );
1119 }
1120 break;
1121
1122 case 0x000d: /* Allocate specific LDT descriptor */
1123 FIXME( "allocate descriptor (0x%04x), stub!\n", BX_reg(context) );
1124 SET_AX( context, 0x8011 ); /* descriptor unavailable */
1125 SET_CFLAG( context );
1126 break;
1127
1128 case 0x000e: /* Get Multiple Descriptors (1.0) */
1129 FIXME( "get multiple descriptors - unimplemented\n" );
1130 break;
1131
1132 case 0x000f: /* Set Multiple Descriptors (1.0) */
1133 FIXME( "set multiple descriptors - unimplemented\n" );
1134 break;
1135
1136 case 0x0100: /* Allocate DOS memory block */
1137 TRACE( "allocate DOS memory block (0x%x paragraphs)\n", BX_reg(context) );
1138 {
1139 DWORD dw = GlobalDOSAlloc16( (DWORD)BX_reg(context) << 4 );
1140 if (dw) {
1141 SET_AX( context, HIWORD(dw) );
1142 SET_DX( context, LOWORD(dw) );
1143 } else {
1144 SET_AX( context, 0x0008 ); /* insufficient memory */
1145 SET_BX( context, DOSMEM_Available() >> 4 );
1146 SET_CFLAG(context);
1147 }
1148 break;
1149 }
1150
1151 case 0x0101: /* Free DOS memory block */
1152 TRACE( "free DOS memory block (0x%04x)\n", DX_reg(context) );
1153 {
1154 WORD error = GlobalDOSFree16( DX_reg(context) );
1155 if (error) {
1156 SET_AX( context, 0x0009 ); /* memory block address invalid */
1157 SET_CFLAG( context );
1158 }
1159 }
1160 break;
1161
1162 case 0x0102: /* Resize DOS Memory Block */
1163 FIXME( "resize DOS memory block (0x%04x, 0x%x paragraphs) - unimplemented\n",
1164 DX_reg(context), BX_reg(context) );
1165 break;
1166
1167 case 0x0200: /* get real mode interrupt vector */
1168 TRACE( "get realmode interrupt vector (0x%02x)\n",
1169 BL_reg(context) );
1170 {
1171 FARPROC16 proc = DOSVM_GetRMHandler( BL_reg(context) );
1172 SET_CX( context, SELECTOROF(proc) );
1173 SET_DX( context, OFFSETOF(proc) );
1174 }
1175 break;
1176
1177 case 0x0201: /* set real mode interrupt vector */
1178 TRACE( "set realmode interrupt vector (0x%02x, 0x%04x:0x%04x)\n",
1179 BL_reg(context), CX_reg(context), DX_reg(context) );
1180 DOSVM_SetRMHandler( BL_reg(context),
1181 (FARPROC16)MAKESEGPTR(CX_reg(context), DX_reg(context)) );
1182 break;
1183
1184 case 0x0202: /* Get Processor Exception Handler Vector */
1185 FIXME( "Get Processor Exception Handler Vector (0x%02x)\n",
1186 BL_reg(context) );
1187 if (DOSVM_IsDos32())
1188 {
1189 SET_CX( context, 0 );
1190 context->Edx = 0;
1191 }
1192 else
1193 {
1194 SET_CX( context, 0 );
1195 SET_DX( context, 0 );
1196 }
1197 break;
1198
1199 case 0x0203: /* Set Processor Exception Handler Vector */
1200 FIXME( "Set Processor Exception Handler Vector (0x%02x)\n",
1201 BL_reg(context) );
1202 break;
1203
1204 case 0x0204: /* Get protected mode interrupt vector */
1205 TRACE("get protected mode interrupt handler (0x%02x)\n",
1206 BL_reg(context));
1207 if (DOSVM_IsDos32())
1208 {
1209 FARPROC48 handler = DOSVM_GetPMHandler48( BL_reg(context) );
1210 SET_CX( context, handler.selector );
1211 context->Edx = handler.offset;
1212 }
1213 else
1214 {
1215 FARPROC16 handler = DOSVM_GetPMHandler16( BL_reg(context) );
1216 SET_CX( context, SELECTOROF(handler) );
1217 SET_DX( context, OFFSETOF(handler) );
1218 }
1219 break;
1220
1221 case 0x0205: /* Set protected mode interrupt vector */
1222 TRACE("set protected mode interrupt handler (0x%02x,0x%04x:0x%08x)\n",
1223 BL_reg(context), CX_reg(context), context->Edx);
1224 if (DOSVM_IsDos32())
1225 {
1226 FARPROC48 handler;
1227 handler.selector = CX_reg(context);
1228 handler.offset = context->Edx;
1229 DOSVM_SetPMHandler48( BL_reg(context), handler );
1230 }
1231 else
1232 {
1233 FARPROC16 handler;
1234 handler = (FARPROC16)MAKESEGPTR( CX_reg(context), DX_reg(context));
1235 DOSVM_SetPMHandler16( BL_reg(context), handler );
1236 }
1237 break;
1238
1239 case 0x0300: /* Simulate real mode interrupt */
1240 TRACE( "Simulate real mode interrupt %02x.\n", BL_reg(context));
1241 DOSVM_CallRMInt( context );
1242 break;
1243
1244 case 0x0301: /* Call real mode procedure with far return */
1245 TRACE( "Call real mode procedure with far return.\n" );
1246 DOSVM_CallRMProc( context, FALSE );
1247 break;
1248
1249 case 0x0302: /* Call real mode procedure with interrupt return */
1250 TRACE( "Call real mode procedure with interrupt return.\n" );
1251 DOSVM_CallRMProc( context, TRUE );
1252 break;
1253
1254 case 0x0303: /* Allocate Real Mode Callback Address */
1255 TRACE( "Allocate real mode callback address.\n" );
1256 DOSVM_AllocRMCB( context );
1257 break;
1258
1259 case 0x0304: /* Free Real Mode Callback Address */
1260 TRACE( "Free real mode callback address.\n" );
1261 DOSVM_FreeRMCB( context );
1262 break;
1263
1264 case 0x0305: /* Get State Save/Restore Addresses */
1265 TRACE("get state save/restore addresses\n");
1266 /* we probably won't need this kind of state saving */
1267 SET_AX( context, 0 );
1268
1269 /* real mode: just point to the lret */
1270 SET_BX( context, DOSVM_dpmi_segments->wrap_seg );
1271 SET_CX( context, 2 );
1272
1273 /* protected mode: don't have any handler yet... */
1274 /* FIXME: Use DI in 16-bit DPMI and EDI in 32-bit DPMI */
1275 FIXME("no protected-mode dummy state save/restore handler yet\n");
1276 SET_SI( context, 0 );
1277 context->Edi = 0;
1278 break;
1279
1280 case 0x0306: /* Get Raw Mode Switch Addresses */
1281 TRACE("get raw mode switch addresses\n");
1282
1283 /* real mode, point to standard DPMI return wrapper */
1284 SET_BX( context, DOSVM_dpmi_segments->wrap_seg );
1285 SET_CX( context, 0 );
1286
1287 /* protected mode, point to DPMI call wrapper */
1288 /* FIXME: Use DI in 16-bit DPMI and EDI in 32-bit DPMI */
1289 /* FIXME: Doesn't work in DPMI32... */
1290 SET_SI( context, DOSVM_dpmi_segments->dpmi_sel );
1291 context->Edi = 8; /* offset of the INT 0x31 call */
1292 break;
1293
1294 case 0x0400: /* Get DPMI version */
1295 TRACE("get DPMI version\n");
1296 {
1297 SYSTEM_INFO si;
1298
1299 GetSystemInfo(&si);
1300 SET_AX( context, 0x005a ); /* DPMI version 0.90 */
1301 SET_BX( context, 0x0005 ); /* Flags: 32-bit, virtual memory */
1302 SET_CL( context, si.wProcessorLevel );
1303 SET_DX( context, 0x0870 ); /* Master/slave interrupt controller base */
1304 }
1305 break;
1306
1307 case 0x0401: /* Get DPMI Capabilities (1.0) */
1308 FIXME( "get dpmi capabilities - unimplemented\n");
1309 break;
1310
1311 case 0x0500: /* Get free memory information */
1312 TRACE("get free memory information\n");
1313 {
1314 MEMORYSTATUS status;
1315
1316 /* the layout is just the same as MEMMANINFO, but without
1317 * the dwSize entry.
1318 */
1319 struct
1320 {
1321 DWORD dwLargestFreeBlock;
1322 DWORD dwMaxPagesAvailable;
1323 DWORD dwMaxPagesLockable;
1324 DWORD dwTotalLinearSpace;
1325 DWORD dwTotalUnlockedPages;
1326 DWORD dwFreePages;
1327 DWORD dwTotalPages;
1328 DWORD dwFreeLinearSpace;
1329 DWORD dwSwapFilePages;
1330 WORD wPageSize;
1331 } *info = CTX_SEG_OFF_TO_LIN( context, context->SegEs, context->Edi );
1332
1333 GlobalMemoryStatus( &status );
1334 info->wPageSize = getpagesize();
1335 info->dwLargestFreeBlock = status.dwAvailVirtual;
1336 info->dwMaxPagesAvailable = info->dwLargestFreeBlock / info->wPageSize;
1337 info->dwMaxPagesLockable = info->dwMaxPagesAvailable;
1338 info->dwTotalLinearSpace = status.dwTotalVirtual / info->wPageSize;
1339 info->dwTotalUnlockedPages = info->dwTotalLinearSpace;
1340 info->dwFreePages = info->dwMaxPagesAvailable;
1341 info->dwTotalPages = info->dwTotalLinearSpace;
1342 info->dwFreeLinearSpace = info->dwMaxPagesAvailable;
1343 info->dwSwapFilePages = status.dwTotalPageFile / info->wPageSize;
1344 break;
1345 }
1346
1347 case 0x0501: /* Allocate memory block */
1348 {
1349 DWORD size = MAKELONG( CX_reg(context), BX_reg(context) );
1350 BYTE *ptr;
1351
1352 TRACE( "allocate memory block (%u bytes)\n", size );
1353
1354 ptr = DPMI_xalloc( size );
1355 if (!ptr)
1356 {
1357 SET_AX( context, 0x8012 ); /* linear memory not available */
1358 SET_CFLAG(context);
1359 }
1360 else
1361 {
1362 SET_BX( context, HIWORD(ptr) );
1363 SET_CX( context, LOWORD(ptr) );
1364 SET_SI( context, HIWORD(ptr) );
1365 SET_DI( context, LOWORD(ptr) );
1366 }
1367 break;
1368 }
1369
1370 case 0x0502: /* Free memory block */
1371 {
1372 DWORD handle = MAKELONG( DI_reg(context), SI_reg(context) );
1373 TRACE( "free memory block (0x%08x)\n", handle );
1374 DPMI_xfree( (void *)handle );
1375 }
1376 break;
1377
1378 case 0x0503: /* Resize memory block */
1379 {
1380 DWORD size = MAKELONG( CX_reg(context), BX_reg(context) );
1381 DWORD handle = MAKELONG( DI_reg(context), SI_reg(context) );
1382 BYTE *ptr;
1383
1384 TRACE( "resize memory block (0x%08x, %u bytes)\n", handle, size );
1385
1386 ptr = DPMI_xrealloc( (void *)handle, size );
1387 if (!ptr)
1388 {
1389 SET_AX( context, 0x8012 ); /* linear memory not available */
1390 SET_CFLAG(context);
1391 } else {
1392 SET_BX( context, HIWORD(ptr) );
1393 SET_CX( context, LOWORD(ptr) );
1394 SET_SI( context, HIWORD(ptr) );
1395 SET_DI( context, LOWORD(ptr) );
1396 }
1397 }
1398 break;
1399
1400 case 0x0507: /* Set page attributes (1.0) */
1401 FIXME( "set page attributes - unimplemented\n" );
1402 break; /* Just ignore it */
1403
1404 case 0x0600: /* Lock linear region */
1405 TRACE( "lock linear region - ignored (no paging)\n" );
1406 break;
1407
1408 case 0x0601: /* Unlock linear region */
1409 TRACE( "unlock linear region - ignored (no paging)\n" );
1410 break;
1411
1412 case 0x0602: /* Mark real mode region as pageable */
1413 TRACE( "mark real mode region as pageable - ignored (no paging)\n" );
1414 break;
1415
1416 case 0x0603: /* Relock real mode region */
1417 TRACE( "relock real mode region - ignored (no paging)\n" );
1418 break;
1419
1420 case 0x0604: /* Get page size */
1421 TRACE("get pagesize\n");
1422 SET_BX( context, HIWORD(getpagesize()) );
1423 SET_CX( context, LOWORD(getpagesize()) );
1424 break;
1425
1426 case 0x0700: /* Mark pages as paging candidates */
1427 TRACE( "mark pages as paging candidates - ignored (no paging)\n" );
1428 break;
1429
1430 case 0x0701: /* Discard pages */
1431 TRACE( "discard pages - ignored (no paging)\n" );
1432 break;
1433
1434 case 0x0702: /* Mark page as demand-paging candidate */
1435 TRACE( "mark page as demand-paging candidate - ignored (no paging)\n" );
1436 break;
1437
1438 case 0x0703: /* Discard page contents */
1439 TRACE( "discard page contents - ignored (no paging)\n" );
1440 break;
1441
1442 case 0x0800: /* Physical address mapping */
1443 FIXME( "physical address mapping (0x%08x) - unimplemented\n",
1444 MAKELONG(CX_reg(context),BX_reg(context)) );
1445 break;
1446
1447 case 0x0900: /* Get and Disable Virtual Interrupt State */
1448 TRACE( "Get and Disable Virtual Interrupt State: %d\n",
1449 get_vm86_teb_info()->dpmi_vif );
1450 SET_AL( context, get_vm86_teb_info()->dpmi_vif ? 1 : 0 );
1451 get_vm86_teb_info()->dpmi_vif = 0;
1452 break;
1453
1454 case 0x0901: /* Get and Enable Virtual Interrupt State */
1455 TRACE( "Get and Enable Virtual Interrupt State: %d\n",
1456 get_vm86_teb_info()->dpmi_vif );
1457 SET_AL( context, get_vm86_teb_info()->dpmi_vif ? 1 : 0 );
1458 get_vm86_teb_info()->dpmi_vif = 1;
1459 break;
1460
1461 case 0x0902: /* Get Virtual Interrupt State */
1462 TRACE( "Get Virtual Interrupt State: %d\n",
1463 get_vm86_teb_info()->dpmi_vif );
1464 SET_AL( context, get_vm86_teb_info()->dpmi_vif ? 1 : 0 );
1465 break;
1466
1467 case 0x0e00: /* Get Coprocessor Status (1.0) */
1468 /*
1469 * Return status in AX bits:
1470 * B0 - MPv (MP bit in the virtual MSW/CR0)
1471 * 0 = numeric coprocessor is disabled for this client
1472 * 1 = numeric coprocessor is enabled for this client
1473 * B1 - EMv (EM bit in the virtual MSW/CR0)
1474 * 0 = client is not emulating coprocessor instructions
1475 * 1 = client is emulating coprocessor instructions
1476 * B2 - MPr (MP bit from the actual MSW/CR0)
1477 * 0 = numeric coprocessor is not present
1478 * 1 = numeric coprocessor is present
1479 * B3 - EMr (EM bit from the actual MSW/CR0)
1480 * 0 = host is not emulating coprocessor instructions
1481 * 1 = host is emulating coprocessor instructions
1482 * B4-B7 - coprocessor type
1483 * 00H = no coprocessor
1484 * 02H = 80287
1485 * 03H = 80387
1486 * 04H = 80486 with numeric coprocessor
1487 * 05H-0FH = reserved for future numeric processors
1488 */
1489 TRACE( "Get Coprocessor Status\n" );
1490 SET_AX( context, 69 ); /* 486, coprocessor present and enabled */
1491 break;
1492
1493 case 0x0e01: /* Set Coprocessor Emulation (1.0) */
1494 /*
1495 * See function 0x0e00.
1496 * BX bit B0 is new value for MPv.
1497 * BX bit B1 is new value for EMv.
1498 */
1499 if (BX_reg(context) != 1)
1500 FIXME( "Set Coprocessor Emulation to %d - unimplemented\n",
1501 BX_reg(context) );
1502 else
1503 TRACE( "Set Coprocessor Emulation - ignored\n" );
1504 break;
1505
1506 default:
1507 INT_BARF( context, 0x31 );
1508 SET_AX( context, 0x8001 ); /* unsupported function */
1509 SET_CFLAG(context);
1510 break;
1511 }
1512 }
Maarten's multimedia branch