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shdocvw: Pass correct buffer size to UrlApplySchemeW.
[wine/hacks.git] / dlls / krnl386.exe16 / int31.c
blob518347053937d95017fe5e78357d869822701eea
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) ? TRUE : FALSE;
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, CONTEXT86 *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, CONTEXT86 *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 (%d 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 %d 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 LPVOID newptr;
270
271 newptr = DPMI_xalloc( newsize );
272 if (ptr)
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 memcpy( newptr, ptr, mbi.RegionSize );
293 DPMI_xfree( ptr );
294 }
295
296 return newptr;
297 }
298
299
300 void DPMI_CallRMCB32(RMCB *rmcb, UINT16 ss, DWORD esp, UINT16*es, DWORD*edi)
301 #if 0 /* original code, which early gccs puke on */
302 {
303 int _clobber;
304 __asm__ __volatile__(
305 "pushl %%ebp\n"
306 "pushl %%ebx\n"
307 "pushl %%es\n"
308 "pushl %%ds\n"
309 "pushfl\n"
310 "mov %7,%%es\n"
311 "mov %5,%%ds\n"
312 ".byte 0x36, 0xff, 0x18\n" /* lcall *%ss:(%eax) */
313 "popl %%ds\n"
314 "mov %%es,%0\n"
315 "popl %%es\n"
316 "popl %%ebx\n"
317 "popl %%ebp\n"
318 : "=d" (*es), "=D" (*edi), "=S" (_clobber), "=a" (_clobber), "=c" (_clobber)
319 : "0" (ss), "2" (esp),
320 "4" (rmcb->regs_sel), "1" (rmcb->regs_ofs),
321 "3" (&rmcb->proc_ofs) );
322 }
323 #else /* code generated by a gcc new enough */
324 ;
325 __ASM_GLOBAL_FUNC(DPMI_CallRMCB32,
326 "pushl %ebp\n\t"
327 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
328 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
329 "movl %esp,%ebp\n\t"
330 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
331 "pushl %edi\n\t"
332 __ASM_CFI(".cfi_rel_offset %edi,-4\n\t")
333 "pushl %esi\n\t"
334 __ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
335 "movl 0x8(%ebp),%eax\n\t"
336 "movl 0x10(%ebp),%esi\n\t"
337 "movl 0xc(%ebp),%edx\n\t"
338 "movl 0x10(%eax),%ecx\n\t"
339 "movl 0xc(%eax),%edi\n\t"
340 "addl $0x4,%eax\n\t"
341 "pushl %ebp\n\t"
342 "pushl %ebx\n\t"
343 "pushl %es\n\t"
344 "pushl %ds\n\t"
345 "pushfl\n\t"
346 "mov %cx,%es\n\t"
347 "mov %dx,%ds\n\t"
348 ".byte 0x36, 0xff, 0x18\n\t" /* lcall *%ss:(%eax) */
349 "popl %ds\n\t"
350 "mov %es,%dx\n\t"
351 "popl %es\n\t"
352 "popl %ebx\n\t"
353 "popl %ebp\n\t"
354 "movl 0x14(%ebp),%eax\n\t"
355 "movw %dx,(%eax)\n\t"
356 "movl 0x18(%ebp),%edx\n\t"
357 "movl %edi,(%edx)\n\t"
358 "popl %esi\n\t"
359 __ASM_CFI(".cfi_same_value %esi\n\t")
360 "popl %edi\n\t"
361 __ASM_CFI(".cfi_same_value %edi\n\t")
362 "leave\n\t"
363 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
364 __ASM_CFI(".cfi_same_value %ebp\n\t")
365 "ret")
366 #endif
367
368 /**********************************************************************
369 * DPMI_CallRMCBProc
370 *
371 * This routine does the hard work of calling a callback procedure.
372 */
373 static void DPMI_CallRMCBProc( CONTEXT86 *context, RMCB *rmcb, WORD flag )
374 {
375 DWORD old_vif = get_vm86_teb_info()->dpmi_vif;
376
377 /* Disable virtual interrupts. */
378 get_vm86_teb_info()->dpmi_vif = 0;
379
380 if (wine_ldt_is_system( rmcb->proc_sel )) {
381 /* Wine-internal RMCB, call directly */
382 ((RMCBPROC)rmcb->proc_ofs)(context);
383 } else __TRY {
384 UINT16 ss,es;
385 DWORD esp,edi;
386
387 INT_SetRealModeContext(MapSL(MAKESEGPTR( rmcb->regs_sel, rmcb->regs_ofs )), context);
388 ss = alloc_pm_selector( context->SegSs, WINE_LDT_FLAGS_DATA );
389 esp = context->Esp;
390
391 FIXME("untested!\n");
392
393 /* The called proc ends with an IRET, and takes these parameters:
394 * DS:ESI = pointer to real-mode SS:SP
395 * ES:EDI = pointer to real-mode call structure
396 * It returns:
397 * ES:EDI = pointer to real-mode call structure (may be a copy)
398 * It is the proc's responsibility to change the return CS:IP in the
399 * real-mode call structure. */
400 if (flag & 1) {
401 /* 32-bit DPMI client */
402 DPMI_CallRMCB32(rmcb, ss, esp, &es, &edi);
403 } else {
404 /* 16-bit DPMI client */
405 CONTEXT86 ctx = *context;
406 ctx.SegCs = rmcb->proc_sel;
407 ctx.Eip = rmcb->proc_ofs;
408 ctx.SegDs = ss;
409 ctx.Esi = esp;
410 ctx.SegEs = rmcb->regs_sel;
411 ctx.Edi = rmcb->regs_ofs;
412 /* FIXME: I'm pretty sure this isn't right - should push flags first */
413 WOWCallback16Ex( 0, WCB16_REGS, 0, NULL, (DWORD *)&ctx );
414 es = ctx.SegEs;
415 edi = ctx.Edi;
416 }
417 wine_ldt_free_entries( ss, 1 );
418 INT_GetRealModeContext( MapSL( MAKESEGPTR( es, edi )), context);
419 } __EXCEPT(dpmi_exception_handler) { } __ENDTRY
420
421 /* Restore virtual interrupt flag. */
422 get_vm86_teb_info()->dpmi_vif = old_vif;
423 }
424
425
426 /**********************************************************************
427 * DPMI_CallRMProc
428 *
429 * This routine does the hard work of calling a real mode procedure.
430 */
431 int DPMI_CallRMProc( CONTEXT86 *context, LPWORD stack, int args, int iret )
432 {
433 LPWORD stack16;
434 LPVOID addr = NULL; /* avoid gcc warning */
435 RMCB *CurrRMCB;
436 int alloc = 0, already = 0;
437 BYTE *code;
438
439 TRACE("EAX=%08x EBX=%08x ECX=%08x EDX=%08x\n",
440 context->Eax, context->Ebx, context->Ecx, context->Edx );
441 TRACE("ESI=%08x EDI=%08x ES=%04x DS=%04x CS:IP=%04x:%04x, %d WORD arguments, %s\n",
442 context->Esi, context->Edi, context->SegEs, context->SegDs,
443 context->SegCs, LOWORD(context->Eip), args, iret?"IRET":"FAR" );
444
445 callrmproc_again:
446
447 /* there might be some code that just jumps to RMCBs or the like,
448 in which case following the jumps here might get us to a shortcut */
449 code = CTX_SEG_OFF_TO_LIN(context, context->SegCs, context->Eip);
450 switch (*code) {
451 case 0xe9: /* JMP NEAR */
452 context->Eip += 3 + *(WORD *)(code+1);
453 /* yeah, I know these gotos don't look good... */
454 goto callrmproc_again;
455 case 0xea: /* JMP FAR */
456 context->Eip = *(WORD *)(code+1);
457 context->SegCs = *(WORD *)(code+3);
458 /* ...but since the label is there anyway... */
459 goto callrmproc_again;
460 case 0xeb: /* JMP SHORT */
461 context->Eip += 2 + *(signed char *)(code+1);
462 /* ...because of other gotos below, so... */
463 goto callrmproc_again;
464 }
465
466 /* shortcut for chaining to internal interrupt handlers */
467 if ((context->SegCs == 0xF000) && iret)
468 {
469 DOSVM_CallBuiltinHandler( context, LOWORD(context->Eip)/4 );
470 return 0;
471 }
472
473 /* shortcut for RMCBs */
474 CurrRMCB = FirstRMCB;
475
476 while (CurrRMCB && (HIWORD(CurrRMCB->address) != context->SegCs))
477 CurrRMCB = CurrRMCB->next;
478
479 if (!CurrRMCB && !MZ_Current())
480 {
481 FIXME("DPMI real-mode call using DOS VM task system, not fully tested!\n");
482 TRACE("creating VM86 task\n");
483 MZ_AllocDPMITask();
484 }
485 if (!already) {
486 if (!context->SegSs) {
487 alloc = 1; /* allocate default stack */
488 stack16 = addr = DOSMEM_AllocBlock( 64, (UINT16 *)&(context->SegSs) );
489 context->Esp = 64-2;
490 stack16 += 32-1;
491 if (!addr) {
492 ERR("could not allocate default stack\n");
493 return 1;
494 }
495 } else {
496 stack16 = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp);
497 }
498 context->Esp -= (args + (iret?1:0)) * sizeof(WORD);
499 stack16 -= args;
500 if (args) memcpy(stack16, stack, args*sizeof(WORD) );
501 /* push flags if iret */
502 if (iret) {
503 stack16--; args++;
504 *stack16 = LOWORD(context->EFlags);
505 }
506 /* push return address (return to interrupt wrapper) */
507 *(--stack16) = DOSVM_dpmi_segments->wrap_seg;
508 *(--stack16) = 0;
509 /* adjust stack */
510 context->Esp -= 2*sizeof(WORD);
511 already = 1;
512 }
513
514 if (CurrRMCB) {
515 /* RMCB call, invoke protected-mode handler directly */
516 DPMI_CallRMCBProc(context, CurrRMCB, dpmi_flag);
517 /* check if we returned to where we thought we would */
518 if ((context->SegCs != DOSVM_dpmi_segments->wrap_seg) ||
519 (LOWORD(context->Eip) != 0)) {
520 /* we need to continue at different address in real-mode space,
521 so we need to set it all up for real mode again */
522 goto callrmproc_again;
523 }
524 } else {
525 TRACE("entering real mode...\n");
526 DOSVM_Enter( context );
527 TRACE("returned from real-mode call\n");
528 }
529 if (alloc) DOSMEM_FreeBlock( addr );
530 return 0;
531 }
532
533
534 /**********************************************************************
535 * CallRMInt
536 */
537 static void DOSVM_CallRMInt( CONTEXT86 *context )
538 {
539 CONTEXT86 realmode_ctx;
540 FARPROC16 rm_int = DOSVM_GetRMHandler( BL_reg(context) );
541 REALMODECALL *call = CTX_SEG_OFF_TO_LIN( context,
542 context->SegEs,
543 context->Edi );
544 INT_GetRealModeContext( call, &realmode_ctx );
545
546 /* we need to check if a real-mode program has hooked the interrupt */
547 if (HIWORD(rm_int)!=0xF000) {
548 /* yup, which means we need to switch to real mode... */
549 realmode_ctx.SegCs = HIWORD(rm_int);
550 realmode_ctx.Eip = LOWORD(rm_int);
551 if (DPMI_CallRMProc( &realmode_ctx, NULL, 0, TRUE))
552 SET_CFLAG(context);
553 } else {
554 RESET_CFLAG(context);
555 /* use the IP we have instead of BL_reg, in case some apps
556 decide to move interrupts around for whatever reason... */
557 DOSVM_CallBuiltinHandler( &realmode_ctx, LOWORD(rm_int)/4 );
558 }
559 INT_SetRealModeContext( call, &realmode_ctx );
560 }
561
562
563 /**********************************************************************
564 * CallRMProc
565 */
566 static void DOSVM_CallRMProc( CONTEXT86 *context, int iret )
567 {
568 REALMODECALL *p = CTX_SEG_OFF_TO_LIN( context,
569 context->SegEs,
570 context->Edi );
571 CONTEXT86 context16;
572
573 TRACE("RealModeCall: EAX=%08x EBX=%08x ECX=%08x EDX=%08x\n",
574 p->eax, p->ebx, p->ecx, p->edx);
575 TRACE(" ESI=%08x EDI=%08x ES=%04x DS=%04x CS:IP=%04x:%04x, %d WORD arguments, %s\n",
576 p->esi, p->edi, p->es, p->ds, p->cs, p->ip, CX_reg(context), iret?"IRET":"FAR" );
577
578 if (!(p->cs) && !(p->ip)) { /* remove this check
579 if Int21/6501 case map function
580 has been implemented */
581 SET_CFLAG(context);
582 return;
583 }
584 INT_GetRealModeContext(p, &context16);
585 DPMI_CallRMProc( &context16, ((LPWORD)MapSL(MAKESEGPTR(context->SegSs, LOWORD(context->Esp))))+3,
586 CX_reg(context), iret );
587 INT_SetRealModeContext(p, &context16);
588 }
589
590
591 /* (see dosmem.c, function DOSMEM_InitDPMI) */
592 static void StartPM( CONTEXT86 *context )
593 {
594 UINT16 cs, ss, ds, es;
595 CONTEXT86 pm_ctx;
596 DWORD psp_ofs = (DWORD)(DOSVM_psp<<4);
597 PDB16 *psp = (PDB16 *)psp_ofs;
598 HANDLE16 env_seg = psp->environment;
599 unsigned char selflags = WINE_LDT_FLAGS_DATA;
600
601 RESET_CFLAG(context);
602 dpmi_flag = AX_reg(context);
603 /* our mode switch wrapper have placed the desired CS into DX */
604 cs = alloc_pm_selector( context->Edx, WINE_LDT_FLAGS_CODE );
605 /* due to a flaw in some CPUs (at least mine), it is best to mark stack segments as 32-bit if they
606 can be used in 32-bit code. Otherwise, these CPUs may not set the high word of esp during a
607 ring transition (from kernel code) to the 16-bit stack, and this causes trouble if executing
608 32-bit code using this stack. */
609 if (dpmi_flag & 1) selflags |= WINE_LDT_FLAGS_32BIT;
610 ss = alloc_pm_selector( context->SegSs, selflags );
611 /* do the same for the data segments, just in case */
612 if (context->SegDs == context->SegSs) ds = ss;
613 else ds = alloc_pm_selector( context->SegDs, selflags );
614 es = alloc_pm_selector( DOSVM_psp, selflags );
615 /* convert environment pointer, as the spec says, but we're a bit lazy about the size here... */
616 psp->environment = alloc_pm_selector( env_seg, WINE_LDT_FLAGS_DATA );
617
618 pm_ctx = *context;
619 pm_ctx.SegCs = DOSVM_dpmi_segments->dpmi_sel;
620 /* our mode switch wrapper expects the new CS in DX, and the new SS in AX */
621 pm_ctx.Eax = ss;
622 pm_ctx.Edx = cs;
623 pm_ctx.SegDs = ds;
624 pm_ctx.SegEs = es;
625 pm_ctx.SegFs = wine_get_fs();
626 pm_ctx.SegGs = wine_get_gs();
627 pm_ctx.EFlags &= ~V86_FLAG;
628
629 TRACE("DOS program is now entering %d-bit protected mode\n",
630 DOSVM_IsDos32() ? 32 : 16);
631
632 __TRY
633 {
634 WOWCallback16Ex( 0, WCB16_REGS, 0, NULL, (DWORD *)&pm_ctx );
635 }
636 __EXCEPT(dpmi_exception_handler)
637 {
638 }
639 __ENDTRY
640
641 TRACE( "Protected mode DOS program is terminating\n" );
642
643 /*
644 * FIXME: Instead of calling DOSVM_Exit, we should release all
645 * allocated protected mode resources and call MZ_Exit
646 * using real mode context. See DPMI specification.
647 */
648 DOSVM_Exit( DPMI_retval );
649
650 #if 0
651 wine_ldt_free_entries( psp->environment, 1 );
652 psp->environment = env_seg;
653 wine_ldt_free_entries(es,1);
654 if (ds != ss) wine_ldt_free_entries(ds,1);
655 wine_ldt_free_entries(ss,1);
656 wine_ldt_free_entries(cs,1);
657 #endif
658 }
659
660 static RMCB *DPMI_AllocRMCB( void )
661 {
662 RMCB *NewRMCB = HeapAlloc(GetProcessHeap(), 0, sizeof(RMCB));
663 UINT16 uParagraph;
664
665 if (NewRMCB)
666 {
667 LPVOID RMCBmem = DOSMEM_AllocBlock(4, &uParagraph);
668 LPBYTE p = RMCBmem;
669
670 *p++ = 0xcd; /* RMCB: */
671 *p++ = 0x31; /* int $0x31 */
672 /* it is the called procedure's task to change the return CS:EIP
673 the DPMI 0.9 spec states that if it doesn't, it will be called again */
674 *p++ = 0xeb;
675 *p++ = 0xfc; /* jmp RMCB */
676 NewRMCB->address = MAKELONG(0, uParagraph);
677 NewRMCB->next = FirstRMCB;
678 FirstRMCB = NewRMCB;
679 }
680 return NewRMCB;
681 }
682
683
684 FARPROC16 DPMI_AllocInternalRMCB( RMCBPROC proc )
685 {
686 RMCB *NewRMCB = DPMI_AllocRMCB();
687
688 if (NewRMCB) {
689 NewRMCB->proc_ofs = (DWORD)proc;
690 NewRMCB->proc_sel = 0;
691 NewRMCB->regs_ofs = 0;
692 NewRMCB->regs_sel = 0;
693 return (FARPROC16)(NewRMCB->address);
694 }
695 return NULL;
696 }
697
698
699 static int DPMI_FreeRMCB( DWORD address )
700 {
701 RMCB *CurrRMCB = FirstRMCB;
702 RMCB *PrevRMCB = NULL;
703
704 while (CurrRMCB && (CurrRMCB->address != address))
705 {
706 PrevRMCB = CurrRMCB;
707 CurrRMCB = CurrRMCB->next;
708 }
709 if (CurrRMCB)
710 {
711 if (PrevRMCB)
712 PrevRMCB->next = CurrRMCB->next;
713 else
714 FirstRMCB = CurrRMCB->next;
715 DOSMEM_FreeBlock(PTR_REAL_TO_LIN(SELECTOROF(CurrRMCB->address),OFFSETOF(CurrRMCB->address)));
716 HeapFree(GetProcessHeap(), 0, CurrRMCB);
717 return 0;
718 }
719 return 1;
720 }
721
722
723 /**********************************************************************
724 * DOSVM_RawModeSwitchHandler
725 *
726 * DPMI Raw Mode Switch handler
727 */
728 void WINAPI DOSVM_RawModeSwitchHandler( CONTEXT86 *context )
729 {
730 CONTEXT86 rm_ctx;
731 int ret;
732
733 /* initialize real-mode context as per spec */
734 memset(&rm_ctx, 0, sizeof(rm_ctx));
735 rm_ctx.SegDs = AX_reg(context);
736 rm_ctx.SegEs = CX_reg(context);
737 rm_ctx.SegSs = DX_reg(context);
738 rm_ctx.Esp = context->Ebx;
739 rm_ctx.SegCs = SI_reg(context);
740 rm_ctx.Eip = context->Edi;
741 rm_ctx.Ebp = context->Ebp;
742 rm_ctx.SegFs = 0;
743 rm_ctx.SegGs = 0;
744
745 /* Copy interrupt state. */
746 if (get_vm86_teb_info()->dpmi_vif)
747 rm_ctx.EFlags = V86_FLAG | VIF_MASK;
748 else
749 rm_ctx.EFlags = V86_FLAG;
750
751 /* enter real mode again */
752 TRACE("re-entering real mode at %04x:%04x\n",rm_ctx.SegCs,rm_ctx.Eip);
753 ret = DOSVM_Enter( &rm_ctx );
754 /* when the real-mode stuff call its mode switch address,
755 DOSVM_Enter will return and we will continue here */
756
757 if (ret<0) {
758 ERR("Sync lost!\n");
759 /* if the sync was lost, there's no way to recover */
760 ExitProcess(1);
761 }
762
763 /* alter protected-mode context as per spec */
764 context->SegDs = LOWORD(rm_ctx.Eax);
765 context->SegEs = LOWORD(rm_ctx.Ecx);
766 context->SegSs = LOWORD(rm_ctx.Edx);
767 context->Esp = rm_ctx.Ebx;
768 context->SegCs = LOWORD(rm_ctx.Esi);
769 context->Eip = rm_ctx.Edi;
770 context->Ebp = rm_ctx.Ebp;
771 context->SegFs = 0;
772 context->SegGs = 0;
773
774 /* Copy interrupt state. */
775 if (rm_ctx.EFlags & VIF_MASK)
776 get_vm86_teb_info()->dpmi_vif = 1;
777 else
778 get_vm86_teb_info()->dpmi_vif = 0;
779
780 /* Return to new address and hope that we didn't mess up */
781 TRACE("re-entering protected mode at %04x:%08x\n",
782 context->SegCs, context->Eip);
783 }
784
785
786 /**********************************************************************
787 * AllocRMCB
788 */
789 static void DOSVM_AllocRMCB( CONTEXT86 *context )
790 {
791 RMCB *NewRMCB = DPMI_AllocRMCB();
792
793 TRACE("Function to call: %04x:%04x\n", (WORD)context->SegDs, SI_reg(context) );
794
795 if (NewRMCB)
796 {
797 NewRMCB->proc_ofs = DOSVM_IsDos32() ? context->Esi : LOWORD(context->Esi);
798 NewRMCB->proc_sel = context->SegDs;
799 NewRMCB->regs_ofs = DOSVM_IsDos32() ? context->Edi : LOWORD(context->Edi);
800 NewRMCB->regs_sel = context->SegEs;
801 SET_CX( context, HIWORD(NewRMCB->address) );
802 SET_DX( context, LOWORD(NewRMCB->address) );
803 }
804 else
805 {
806 SET_AX( context, 0x8015 ); /* callback unavailable */
807 SET_CFLAG(context);
808 }
809 }
810
811
812 /**********************************************************************
813 * FreeRMCB
814 */
815 static void DOSVM_FreeRMCB( CONTEXT86 *context )
816 {
817 FIXME("callback address: %04x:%04x\n",
818 CX_reg(context), DX_reg(context));
819
820 if (DPMI_FreeRMCB(MAKELONG(DX_reg(context), CX_reg(context)))) {
821 SET_AX( context, 0x8024 ); /* invalid callback address */
822 SET_CFLAG(context);
823 }
824 }
825
826
827 static BYTE * XMS_Offset( MOVEOFS *ofs )
828 {
829 if (ofs->Handle) return (BYTE*)GlobalLock16(ofs->Handle)+ofs->Offset;
830 else return PTR_REAL_TO_LIN(SELECTOROF(ofs->Offset),OFFSETOF(ofs->Offset));
831 }
832
833 /**********************************************************************
834 * XMS_Handler
835 */
836 static void XMS_Handler( CONTEXT86 *context )
837 {
838 switch(AH_reg(context))
839 {
840 case 0x00: /* Get XMS version number */
841 TRACE("get XMS version number\n");
842 SET_AX( context, 0x0200 ); /* 2.0 */
843 SET_BX( context, 0x0000 ); /* internal revision */
844 SET_DX( context, 0x0001 ); /* HMA exists */
845 break;
846 case 0x08: /* Query Free Extended Memory */
847 {
848 MEMORYSTATUS status;
849
850 TRACE("query free extended memory\n");
851 GlobalMemoryStatus( &status );
852 SET_DX( context, status.dwAvailVirtual >> 10 );
853 SET_AX( context, status.dwAvailVirtual >> 10 );
854 TRACE("returning largest %dK, total %dK\n", AX_reg(context), DX_reg(context));
855 }
856 break;
857 case 0x09: /* Allocate Extended Memory Block */
858 TRACE("allocate extended memory block (%dK)\n",
859 DX_reg(context));
860 SET_DX( context, GlobalAlloc16(GMEM_MOVEABLE, (DWORD)DX_reg(context)<<10) );
861 SET_AX( context, DX_reg(context) ? 1 : 0 );
862 if (!DX_reg(context)) SET_BL( context, 0xA0 ); /* out of memory */
863 break;
864 case 0x0a: /* Free Extended Memory Block */
865 TRACE("free extended memory block %04x\n",DX_reg(context));
866 if(!DX_reg(context) || GlobalFree16(DX_reg(context))) {
867 SET_AX( context, 0 ); /* failure */
868 SET_BL( context, 0xa2 ); /* invalid handle */
869 } else
870 SET_AX( context, 1 ); /* success */
871 break;
872 case 0x0b: /* Move Extended Memory Block */
873 {
874 MOVESTRUCT*move=CTX_SEG_OFF_TO_LIN(context,
875 context->SegDs,context->Esi);
876 BYTE*src,*dst;
877 TRACE("move extended memory block\n");
878 src=XMS_Offset(&move->Source);
879 dst=XMS_Offset(&move->Dest);
880 memcpy(dst,src,move->Length);
881 if (move->Source.Handle) GlobalUnlock16(move->Source.Handle);
882 if (move->Dest.Handle) GlobalUnlock16(move->Dest.Handle);
883 break;
884 }
885 case 0x88: /* Query Any Free Extended Memory */
886 {
887 MEMORYSTATUS status;
888 SYSTEM_INFO info;
889
890 TRACE("query any free extended memory\n");
891
892 GlobalMemoryStatus( &status );
893 GetSystemInfo( &info );
894 context->Eax = status.dwAvailVirtual >> 10;
895 context->Edx = status.dwAvailVirtual >> 10;
896 context->Ecx = (DWORD)info.lpMaximumApplicationAddress;
897 SET_BL( context, 0 ); /* No errors. */
898
899 TRACE("returning largest %dK, total %dK, highest 0x%x\n",
900 context->Eax, context->Edx, context->Ecx);
901 }
902 break;
903 default:
904 INT_BARF( context, 0x31 );
905 SET_AX( context, 0x0000 ); /* failure */
906 SET_BL( context, 0x80 ); /* function not implemented */
907 break;
908 }
909 }
910
911
912 /**********************************************************************
913 * DOSVM_CheckWrappers
914 *
915 * Check if this was really a wrapper call instead of an interrupt.
916 */
917 BOOL DOSVM_CheckWrappers( CONTEXT86 *context )
918 {
919 if (context->SegCs==DOSVM_dpmi_segments->dpmi_seg) {
920 /* This is the protected mode switch */
921 StartPM(context);
922 return TRUE;
923 }
924 else if (context->SegCs==DOSVM_dpmi_segments->xms_seg)
925 {
926 /* This is the XMS driver entry point */
927 XMS_Handler(context);
928 return TRUE;
929 }
930 else
931 {
932 /* Check for RMCB */
933 RMCB *CurrRMCB = FirstRMCB;
934
935 while (CurrRMCB && (HIWORD(CurrRMCB->address) != context->SegCs))
936 CurrRMCB = CurrRMCB->next;
937
938 if (CurrRMCB) {
939 /* RMCB call, propagate to protected-mode handler */
940 DPMI_CallRMCBProc(context, CurrRMCB, dpmi_flag);
941 return TRUE;
942 }
943 }
944
945 return FALSE;
946 }
947
948 /**********************************************************************
949 * DOSVM_Int31Handler
950 *
951 * Handler for int 31h (DPMI).
952 */
953 void WINAPI DOSVM_Int31Handler( CONTEXT86 *context )
954 {
955 RESET_CFLAG(context);
956 switch(AX_reg(context))
957 {
958 case 0x0000: /* Allocate LDT descriptors */
959 TRACE( "allocate LDT descriptors (%d)\n", CX_reg(context) );
960 {
961 WORD sel = AllocSelectorArray16( CX_reg(context) );
962 if(!sel)
963 {
964 TRACE( "failed\n" );
965 SET_AX( context, 0x8011 ); /* descriptor unavailable */
966 SET_CFLAG( context );
967 }
968 else
969 {
970 TRACE( "success, array starts at 0x%04x\n", sel );
971 SET_AX( context, sel );
972 }
973 }
974 break;
975
976 case 0x0001: /* Free LDT descriptor */
977 TRACE( "free LDT descriptor (0x%04x)\n", BX_reg(context) );
978 if (FreeSelector16( BX_reg(context) ))
979 {
980 SET_AX( context, 0x8022 ); /* invalid selector */
981 SET_CFLAG( context );
982 }
983 else
984 {
985 /* If a segment register contains the selector being freed, */
986 /* set it to zero. */
987 if (!((context->SegDs^BX_reg(context)) & ~3)) context->SegDs = 0;
988 if (!((context->SegEs^BX_reg(context)) & ~3)) context->SegEs = 0;
989 if (!((context->SegFs^BX_reg(context)) & ~3)) context->SegFs = 0;
990 if (!((context->SegGs^BX_reg(context)) & ~3)) context->SegGs = 0;
991 }
992 break;
993
994 case 0x0002: /* Real mode segment to descriptor */
995 TRACE( "real mode segment to descriptor (0x%04x)\n", BX_reg(context) );
996 {
997 WORD entryPoint = 0; /* KERNEL entry point for descriptor */
998 switch(BX_reg(context))
999 {
1000 case 0x0000: entryPoint = 183; break; /* __0000H */
1001 case 0x0040: entryPoint = 193; break; /* __0040H */
1002 case 0xa000: entryPoint = 174; break; /* __A000H */
1003 case 0xb000: entryPoint = 181; break; /* __B000H */
1004 case 0xb800: entryPoint = 182; break; /* __B800H */
1005 case 0xc000: entryPoint = 195; break; /* __C000H */
1006 case 0xd000: entryPoint = 179; break; /* __D000H */
1007 case 0xe000: entryPoint = 190; break; /* __E000H */
1008 case 0xf000: entryPoint = 194; break; /* __F000H */
1009 default:
1010 FIXME("Real mode segment (%x) to descriptor: no longer supported\n",
1011 BX_reg(context));
1012 SET_CFLAG( context );
1013 break;
1014 }
1015 if (entryPoint)
1016 {
1017 FARPROC16 proc = GetProcAddress16( GetModuleHandle16( "KERNEL" ),
1018 (LPCSTR)(ULONG_PTR)entryPoint );
1019 SET_AX( context, LOWORD(proc) );
1020 }
1021 }
1022 break;
1023
1024 case 0x0003: /* Get next selector increment */
1025 TRACE("get selector increment (__AHINCR)\n");
1026 context->Eax = __AHINCR;
1027 break;
1028
1029 case 0x0004: /* Lock selector (not supported) */
1030 FIXME("lock selector not supported\n");
1031 context->Eax = 0; /* FIXME: is this a correct return value? */
1032 break;
1033
1034 case 0x0005: /* Unlock selector (not supported) */
1035 FIXME("unlock selector not supported\n");
1036 context->Eax = 0; /* FIXME: is this a correct return value? */
1037 break;
1038
1039 case 0x0006: /* Get selector base address */
1040 TRACE( "get selector base address (0x%04x)\n", BX_reg(context) );
1041 {
1042 LDT_ENTRY entry;
1043 WORD sel = BX_reg(context);
1044 wine_ldt_get_entry( sel, &entry );
1045 if (wine_ldt_is_empty(&entry))
1046 {
1047 context->Eax = 0x8022; /* invalid selector */
1048 SET_CFLAG(context);
1049 }
1050 else
1051 {
1052 void *base = wine_ldt_get_base(&entry);
1053 SET_CX( context, HIWORD(base) );
1054 SET_DX( context, LOWORD(base) );
1055 }
1056 }
1057 break;
1058
1059 case 0x0007: /* Set selector base address */
1060 {
1061 DWORD base = MAKELONG( DX_reg(context), CX_reg(context) );
1062 WORD sel = BX_reg(context);
1063 TRACE( "set selector base address (0x%04x,0x%08x)\n", sel, base );
1064
1065 /* check if Win16 app wants to access lower 64K of DOS memory */
1066 if (base < 0x10000 && DOSVM_IsWin16())
1067 DOSMEM_MapDosLayout();
1068
1069 SetSelectorBase( sel, base );
1070 }
1071 break;
1072
1073 case 0x0008: /* Set selector limit */
1074 {
1075 DWORD limit = MAKELONG( DX_reg(context), CX_reg(context) );
1076 TRACE( "set selector limit (0x%04x,0x%08x)\n",
1077 BX_reg(context), limit );
1078 SetSelectorLimit16( BX_reg(context), limit );
1079 }
1080 break;
1081
1082 case 0x0009: /* Set selector access rights */
1083 TRACE( "set selector access rights(0x%04x,0x%04x)\n",
1084 BX_reg(context), CX_reg(context) );
1085 SelectorAccessRights16( BX_reg(context), 1, CX_reg(context) );
1086 break;
1087
1088 case 0x000a: /* Allocate selector alias */
1089 TRACE( "allocate selector alias (0x%04x)\n", BX_reg(context) );
1090 SET_AX( context, AllocCStoDSAlias16( BX_reg(context) ) );
1091 if (!AX_reg(context))
1092 {
1093 SET_AX( context, 0x8011 ); /* descriptor unavailable */
1094 SET_CFLAG(context);
1095 }
1096 break;
1097
1098 case 0x000b: /* Get descriptor */
1099 TRACE( "get descriptor (0x%04x)\n", BX_reg(context) );
1100 {
1101 LDT_ENTRY *entry = CTX_SEG_OFF_TO_LIN( context, context->SegEs,
1102 context->Edi );
1103 wine_ldt_get_entry( BX_reg(context), entry );
1104 }
1105 break;
1106
1107 case 0x000c: /* Set descriptor */
1108 TRACE( "set descriptor (0x%04x)\n", BX_reg(context) );
1109 {
1110 LDT_ENTRY *entry = CTX_SEG_OFF_TO_LIN( context, context->SegEs,
1111 context->Edi );
1112 wine_ldt_set_entry( BX_reg(context), entry );
1113 }
1114 break;
1115
1116 case 0x000d: /* Allocate specific LDT descriptor */
1117 FIXME( "allocate descriptor (0x%04x), stub!\n", BX_reg(context) );
1118 SET_AX( context, 0x8011 ); /* descriptor unavailable */
1119 SET_CFLAG( context );
1120 break;
1121
1122 case 0x000e: /* Get Multiple Descriptors (1.0) */
1123 FIXME( "get multiple descriptors - unimplemented\n" );
1124 break;
1125
1126 case 0x000f: /* Set Multiple Descriptors (1.0) */
1127 FIXME( "set multiple descriptors - unimplemented\n" );
1128 break;
1129
1130 case 0x0100: /* Allocate DOS memory block */
1131 TRACE( "allocate DOS memory block (0x%x paragraphs)\n", BX_reg(context) );
1132 {
1133 DWORD dw = GlobalDOSAlloc16( (DWORD)BX_reg(context) << 4 );
1134 if (dw) {
1135 SET_AX( context, HIWORD(dw) );
1136 SET_DX( context, LOWORD(dw) );
1137 } else {
1138 SET_AX( context, 0x0008 ); /* insufficient memory */
1139 SET_BX( context, DOSMEM_Available() >> 4 );
1140 SET_CFLAG(context);
1141 }
1142 break;
1143 }
1144
1145 case 0x0101: /* Free DOS memory block */
1146 TRACE( "free DOS memory block (0x%04x)\n", DX_reg(context) );
1147 {
1148 WORD error = GlobalDOSFree16( DX_reg(context) );
1149 if (error) {
1150 SET_AX( context, 0x0009 ); /* memory block address invalid */
1151 SET_CFLAG( context );
1152 }
1153 }
1154 break;
1155
1156 case 0x0102: /* Resize DOS Memory Block */
1157 FIXME( "resize DOS memory block (0x%04x, 0x%x paragraphs) - unimplemented\n",
1158 DX_reg(context), BX_reg(context) );
1159 break;
1160
1161 case 0x0200: /* get real mode interrupt vector */
1162 TRACE( "get realmode interrupt vector (0x%02x)\n",
1163 BL_reg(context) );
1164 {
1165 FARPROC16 proc = DOSVM_GetRMHandler( BL_reg(context) );
1166 SET_CX( context, SELECTOROF(proc) );
1167 SET_DX( context, OFFSETOF(proc) );
1168 }
1169 break;
1170
1171 case 0x0201: /* set real mode interrupt vector */
1172 TRACE( "set realmode interrupt vector (0x%02x, 0x%04x:0x%04x)\n",
1173 BL_reg(context), CX_reg(context), DX_reg(context) );
1174 DOSVM_SetRMHandler( BL_reg(context),
1175 (FARPROC16)MAKESEGPTR(CX_reg(context), DX_reg(context)) );
1176 break;
1177
1178 case 0x0202: /* Get Processor Exception Handler Vector */
1179 FIXME( "Get Processor Exception Handler Vector (0x%02x)\n",
1180 BL_reg(context) );
1181 if (DOSVM_IsDos32())
1182 {
1183 SET_CX( context, 0 );
1184 context->Edx = 0;
1185 }
1186 else
1187 {
1188 SET_CX( context, 0 );
1189 SET_DX( context, 0 );
1190 }
1191 break;
1192
1193 case 0x0203: /* Set Processor Exception Handler Vector */
1194 FIXME( "Set Processor Exception Handler Vector (0x%02x)\n",
1195 BL_reg(context) );
1196 break;
1197
1198 case 0x0204: /* Get protected mode interrupt vector */
1199 TRACE("get protected mode interrupt handler (0x%02x)\n",
1200 BL_reg(context));
1201 if (DOSVM_IsDos32())
1202 {
1203 FARPROC48 handler = DOSVM_GetPMHandler48( BL_reg(context) );
1204 SET_CX( context, handler.selector );
1205 context->Edx = handler.offset;
1206 }
1207 else
1208 {
1209 FARPROC16 handler = DOSVM_GetPMHandler16( BL_reg(context) );
1210 SET_CX( context, SELECTOROF(handler) );
1211 SET_DX( context, OFFSETOF(handler) );
1212 }
1213 break;
1214
1215 case 0x0205: /* Set protected mode interrupt vector */
1216 TRACE("set protected mode interrupt handler (0x%02x,0x%04x:0x%08x)\n",
1217 BL_reg(context), CX_reg(context), context->Edx);
1218 if (DOSVM_IsDos32())
1219 {
1220 FARPROC48 handler;
1221 handler.selector = CX_reg(context);
1222 handler.offset = context->Edx;
1223 DOSVM_SetPMHandler48( BL_reg(context), handler );
1224 }
1225 else
1226 {
1227 FARPROC16 handler;
1228 handler = (FARPROC16)MAKESEGPTR( CX_reg(context), DX_reg(context));
1229 DOSVM_SetPMHandler16( BL_reg(context), handler );
1230 }
1231 break;
1232
1233 case 0x0300: /* Simulate real mode interrupt */
1234 TRACE( "Simulate real mode interrupt %02x.\n", BL_reg(context));
1235 DOSVM_CallRMInt( context );
1236 break;
1237
1238 case 0x0301: /* Call real mode procedure with far return */
1239 TRACE( "Call real mode procedure with far return.\n" );
1240 DOSVM_CallRMProc( context, FALSE );
1241 break;
1242
1243 case 0x0302: /* Call real mode procedure with interrupt return */
1244 TRACE( "Call real mode procedure with interrupt return.\n" );
1245 DOSVM_CallRMProc( context, TRUE );
1246 break;
1247
1248 case 0x0303: /* Allocate Real Mode Callback Address */
1249 TRACE( "Allocate real mode callback address.\n" );
1250 DOSVM_AllocRMCB( context );
1251 break;
1252
1253 case 0x0304: /* Free Real Mode Callback Address */
1254 TRACE( "Free real mode callback address.\n" );
1255 DOSVM_FreeRMCB( context );
1256 break;
1257
1258 case 0x0305: /* Get State Save/Restore Addresses */
1259 TRACE("get state save/restore addresses\n");
1260 /* we probably won't need this kind of state saving */
1261 SET_AX( context, 0 );
1262
1263 /* real mode: just point to the lret */
1264 SET_BX( context, DOSVM_dpmi_segments->wrap_seg );
1265 SET_CX( context, 2 );
1266
1267 /* protected mode: don't have any handler yet... */
1268 /* FIXME: Use DI in 16-bit DPMI and EDI in 32-bit DPMI */
1269 FIXME("no protected-mode dummy state save/restore handler yet\n");
1270 SET_SI( context, 0 );
1271 context->Edi = 0;
1272 break;
1273
1274 case 0x0306: /* Get Raw Mode Switch Addresses */
1275 TRACE("get raw mode switch addresses\n");
1276
1277 /* real mode, point to standard DPMI return wrapper */
1278 SET_BX( context, DOSVM_dpmi_segments->wrap_seg );
1279 SET_CX( context, 0 );
1280
1281 /* protected mode, point to DPMI call wrapper */
1282 /* FIXME: Use DI in 16-bit DPMI and EDI in 32-bit DPMI */
1283 /* FIXME: Doesn't work in DPMI32... */
1284 SET_SI( context, DOSVM_dpmi_segments->dpmi_sel );
1285 context->Edi = 8; /* offset of the INT 0x31 call */
1286 break;
1287
1288 case 0x0400: /* Get DPMI version */
1289 TRACE("get DPMI version\n");
1290 {
1291 SYSTEM_INFO si;
1292
1293 GetSystemInfo(&si);
1294 SET_AX( context, 0x005a ); /* DPMI version 0.90 */
1295 SET_BX( context, 0x0005 ); /* Flags: 32-bit, virtual memory */
1296 SET_CL( context, si.wProcessorLevel );
1297 SET_DX( context, 0x0870 ); /* Master/slave interrupt controller base */
1298 }
1299 break;
1300
1301 case 0x0401: /* Get DPMI Capabilities (1.0) */
1302 FIXME( "get dpmi capabilities - unimplemented\n");
1303 break;
1304
1305 case 0x0500: /* Get free memory information */
1306 TRACE("get free memory information\n");
1307 {
1308 MEMORYSTATUS status;
1309
1310 /* the layout is just the same as MEMMANINFO, but without
1311 * the dwSize entry.
1312 */
1313 struct
1314 {
1315 DWORD dwLargestFreeBlock;
1316 DWORD dwMaxPagesAvailable;
1317 DWORD dwMaxPagesLockable;
1318 DWORD dwTotalLinearSpace;
1319 DWORD dwTotalUnlockedPages;
1320 DWORD dwFreePages;
1321 DWORD dwTotalPages;
1322 DWORD dwFreeLinearSpace;
1323 DWORD dwSwapFilePages;
1324 WORD wPageSize;
1325 } *info = CTX_SEG_OFF_TO_LIN( context, context->SegEs, context->Edi );
1326
1327 GlobalMemoryStatus( &status );
1328 info->wPageSize = getpagesize();
1329 info->dwLargestFreeBlock = status.dwAvailVirtual;
1330 info->dwMaxPagesAvailable = info->dwLargestFreeBlock / info->wPageSize;
1331 info->dwMaxPagesLockable = info->dwMaxPagesAvailable;
1332 info->dwTotalLinearSpace = status.dwTotalVirtual / info->wPageSize;
1333 info->dwTotalUnlockedPages = info->dwTotalLinearSpace;
1334 info->dwFreePages = info->dwMaxPagesAvailable;
1335 info->dwTotalPages = info->dwTotalLinearSpace;
1336 info->dwFreeLinearSpace = info->dwMaxPagesAvailable;
1337 info->dwSwapFilePages = status.dwTotalPageFile / info->wPageSize;
1338 break;
1339 }
1340
1341 case 0x0501: /* Allocate memory block */
1342 {
1343 DWORD size = MAKELONG( CX_reg(context), BX_reg(context) );
1344 BYTE *ptr;
1345
1346 TRACE( "allocate memory block (%d bytes)\n", size );
1347
1348 ptr = DPMI_xalloc( size );
1349 if (!ptr)
1350 {
1351 SET_AX( context, 0x8012 ); /* linear memory not available */
1352 SET_CFLAG(context);
1353 }
1354 else
1355 {
1356 SET_BX( context, HIWORD(ptr) );
1357 SET_CX( context, LOWORD(ptr) );
1358 SET_SI( context, HIWORD(ptr) );
1359 SET_DI( context, LOWORD(ptr) );
1360 }
1361 break;
1362 }
1363
1364 case 0x0502: /* Free memory block */
1365 {
1366 DWORD handle = MAKELONG( DI_reg(context), SI_reg(context) );
1367 TRACE( "free memory block (0x%08x)\n", handle );
1368 DPMI_xfree( (void *)handle );
1369 }
1370 break;
1371
1372 case 0x0503: /* Resize memory block */
1373 {
1374 DWORD size = MAKELONG( CX_reg(context), BX_reg(context) );
1375 DWORD handle = MAKELONG( DI_reg(context), SI_reg(context) );
1376 BYTE *ptr;
1377
1378 TRACE( "resize memory block (0x%08x, %d bytes)\n", handle, size );
1379
1380 ptr = DPMI_xrealloc( (void *)handle, size );
1381 if (!ptr)
1382 {
1383 SET_AX( context, 0x8012 ); /* linear memory not available */
1384 SET_CFLAG(context);
1385 } else {
1386 SET_BX( context, HIWORD(ptr) );
1387 SET_CX( context, LOWORD(ptr) );
1388 SET_SI( context, HIWORD(ptr) );
1389 SET_DI( context, LOWORD(ptr) );
1390 }
1391 }
1392 break;
1393
1394 case 0x0507: /* Set page attributes (1.0) */
1395 FIXME( "set page attributes - unimplemented\n" );
1396 break; /* Just ignore it */
1397
1398 case 0x0600: /* Lock linear region */
1399 TRACE( "lock linear region - ignored (no paging)\n" );
1400 break;
1401
1402 case 0x0601: /* Unlock linear region */
1403 TRACE( "unlock linear region - ignored (no paging)\n" );
1404 break;
1405
1406 case 0x0602: /* Mark real mode region as pageable */
1407 TRACE( "mark real mode region as pageable - ignored (no paging)\n" );
1408 break;
1409
1410 case 0x0603: /* Relock real mode region */
1411 TRACE( "relock real mode region - ignored (no paging)\n" );
1412 break;
1413
1414 case 0x0604: /* Get page size */
1415 TRACE("get pagesize\n");
1416 SET_BX( context, HIWORD(getpagesize()) );
1417 SET_CX( context, LOWORD(getpagesize()) );
1418 break;
1419
1420 case 0x0700: /* Mark pages as paging candidates */
1421 TRACE( "mark pages as paging candidates - ignored (no paging)\n" );
1422 break;
1423
1424 case 0x0701: /* Discard pages */
1425 TRACE( "discard pages - ignored (no paging)\n" );
1426 break;
1427
1428 case 0x0702: /* Mark page as demand-paging candidate */
1429 TRACE( "mark page as demand-paging candidate - ignored (no paging)\n" );
1430 break;
1431
1432 case 0x0703: /* Discard page contents */
1433 TRACE( "discard page contents - ignored (no paging)\n" );
1434 break;
1435
1436 case 0x0800: /* Physical address mapping */
1437 FIXME( "physical address mapping (0x%08x) - unimplemented\n",
1438 MAKELONG(CX_reg(context),BX_reg(context)) );
1439 break;
1440
1441 case 0x0900: /* Get and Disable Virtual Interrupt State */
1442 TRACE( "Get and Disable Virtual Interrupt State: %d\n",
1443 get_vm86_teb_info()->dpmi_vif );
1444 SET_AL( context, get_vm86_teb_info()->dpmi_vif ? 1 : 0 );
1445 get_vm86_teb_info()->dpmi_vif = 0;
1446 break;
1447
1448 case 0x0901: /* Get and Enable Virtual Interrupt State */
1449 TRACE( "Get and Enable Virtual Interrupt State: %d\n",
1450 get_vm86_teb_info()->dpmi_vif );
1451 SET_AL( context, get_vm86_teb_info()->dpmi_vif ? 1 : 0 );
1452 get_vm86_teb_info()->dpmi_vif = 1;
1453 break;
1454
1455 case 0x0902: /* Get Virtual Interrupt State */
1456 TRACE( "Get Virtual Interrupt State: %d\n",
1457 get_vm86_teb_info()->dpmi_vif );
1458 SET_AL( context, get_vm86_teb_info()->dpmi_vif ? 1 : 0 );
1459 break;
1460
1461 case 0x0e00: /* Get Coprocessor Status (1.0) */
1462 /*
1463 * Return status in AX bits:
1464 * B0 - MPv (MP bit in the virtual MSW/CR0)
1465 * 0 = numeric coprocessor is disabled for this client
1466 * 1 = numeric coprocessor is enabled for this client
1467 * B1 - EMv (EM bit in the virtual MSW/CR0)
1468 * 0 = client is not emulating coprocessor instructions
1469 * 1 = client is emulating coprocessor instructions
1470 * B2 - MPr (MP bit from the actual MSW/CR0)
1471 * 0 = numeric coprocessor is not present
1472 * 1 = numeric coprocessor is present
1473 * B3 - EMr (EM bit from the actual MSW/CR0)
1474 * 0 = host is not emulating coprocessor instructions
1475 * 1 = host is emulating coprocessor instructions
1476 * B4-B7 - coprocessor type
1477 * 00H = no coprocessor
1478 * 02H = 80287
1479 * 03H = 80387
1480 * 04H = 80486 with numeric coprocessor
1481 * 05H-0FH = reserved for future numeric processors
1482 */
1483 TRACE( "Get Coprocessor Status\n" );
1484 SET_AX( context, 69 ); /* 486, coprocessor present and enabled */
1485 break;
1486
1487 case 0x0e01: /* Set Coprocessor Emulation (1.0) */
1488 /*
1489 * See function 0x0e00.
1490 * BX bit B0 is new value for MPv.
1491 * BX bit B1 is new value for EMv.
1492 */
1493 if (BX_reg(context) != 1)
1494 FIXME( "Set Coprocessor Emulation to %d - unimplemented\n",
1495 BX_reg(context) );
1496 else
1497 TRACE( "Set Coprocessor Emulation - ignored\n" );
1498 break;
1499
1500 default:
1501 INT_BARF( context, 0x31 );
1502 SET_AX( context, 0x8001 ); /* unsupported function */
1503 SET_CFLAG(context);
1504 break;
1505 }
1506 }
useful hacks and other patches not (yet) suitable for mainline