4 * Copyright 1995 Alexandre Julliard
10 #include "wine/winbase16.h"
17 #include "thread.h" /* for !MZ_SUPPORTED */
18 #include "stackframe.h" /* for !MZ_SUPPORTED */
20 #include "selectors.h"
23 #include "debugtools.h"
25 DEFAULT_DEBUG_CHANNEL(int31
);
27 #define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive())
29 void CreateBPB(int drive
, BYTE
*data
, BOOL16 limited
); /* defined in int21.c */
31 static void* lastvalloced
= NULL
;
33 /* Structure for real-mode callbacks */
57 typedef struct tagRMCB
{
59 DWORD proc_ofs
,proc_sel
;
60 DWORD regs_ofs
,regs_sel
;
64 static RMCB
*FirstRMCB
= NULL
;
68 /**********************************************************************
70 * special virtualalloc, allocates lineary monoton growing memory.
71 * (the usual VirtualAlloc does not satisfy that restriction)
74 DPMI_xalloc(int len
) {
76 LPVOID oldlastv
= lastvalloced
;
82 ret
=VirtualAlloc(lastvalloced
,len
,MEM_COMMIT
|MEM_RESERVE
,PAGE_EXECUTE_READWRITE
);
84 lastvalloced
= (char *) lastvalloced
+ 0x10000;
85 /* we failed to allocate one in the first round.
88 if (!xflag
&& (lastvalloced
<oldlastv
)) { /* wrapped */
89 FIXME("failed to allocate lineary growing memory (%d bytes), using non-linear growing...\n",len
);
92 /* if we even fail to allocate something in the next
95 if ((xflag
==1) && (lastvalloced
>= oldlastv
))
97 if ((xflag
==2) && (lastvalloced
< oldlastv
)) {
98 FIXME("failed to allocate any memory of %d bytes!\n",len
);
103 ret
=VirtualAlloc(NULL
,len
,MEM_COMMIT
|MEM_RESERVE
,PAGE_EXECUTE_READWRITE
);
104 lastvalloced
= (LPVOID
)(((DWORD
)ret
+len
+0xffff)&~0xffff);
109 DPMI_xfree(LPVOID ptr
) {
110 VirtualFree(ptr
,0,MEM_RELEASE
);
113 /* FIXME: perhaps we could grow this mapped area... */
115 DPMI_xrealloc(LPVOID ptr
,int newsize
) {
116 MEMORY_BASIC_INFORMATION mbi
;
119 newptr
= DPMI_xalloc(newsize
);
121 if (!VirtualQuery(ptr
,&mbi
,sizeof(mbi
))) {
122 FIXME("realloc of DPMI_xallocd region %p?\n",ptr
);
125 if (mbi
.State
== MEM_FREE
) {
126 FIXME("realloc of DPMI_xallocd region %p?\n",ptr
);
129 /* We do not shrink allocated memory. most reallocs
130 * only do grows anyway
132 if (newsize
<=mbi
.RegionSize
)
134 memcpy(newptr
,ptr
,mbi
.RegionSize
);
139 /**********************************************************************
140 * INT_GetRealModeContext
142 static void INT_GetRealModeContext( REALMODECALL
*call
, CONTEXT86
*context
)
144 EAX_reg(context
) = call
->eax
;
145 EBX_reg(context
) = call
->ebx
;
146 ECX_reg(context
) = call
->ecx
;
147 EDX_reg(context
) = call
->edx
;
148 ESI_reg(context
) = call
->esi
;
149 EDI_reg(context
) = call
->edi
;
150 EBP_reg(context
) = call
->ebp
;
151 EFL_reg(context
) = call
->fl
| V86_FLAG
;
152 EIP_reg(context
) = call
->ip
;
153 ESP_reg(context
) = call
->sp
;
154 CS_reg(context
) = call
->cs
;
155 DS_reg(context
) = call
->ds
;
156 ES_reg(context
) = call
->es
;
157 FS_reg(context
) = call
->fs
;
158 GS_reg(context
) = call
->gs
;
159 SS_reg(context
) = call
->ss
;
160 V86BASE(context
) = (DWORD
) DOSMEM_MemoryBase(0);
164 /**********************************************************************
165 * INT_SetRealModeContext
167 static void INT_SetRealModeContext( REALMODECALL
*call
, CONTEXT86
*context
)
169 call
->eax
= EAX_reg(context
);
170 call
->ebx
= EBX_reg(context
);
171 call
->ecx
= ECX_reg(context
);
172 call
->edx
= EDX_reg(context
);
173 call
->esi
= ESI_reg(context
);
174 call
->edi
= EDI_reg(context
);
175 call
->ebp
= EBP_reg(context
);
176 call
->fl
= LOWORD(EFL_reg(context
));
177 call
->ip
= LOWORD(EIP_reg(context
));
178 call
->sp
= LOWORD(ESP_reg(context
));
179 call
->cs
= CS_reg(context
);
180 call
->ds
= DS_reg(context
);
181 call
->es
= ES_reg(context
);
182 call
->fs
= FS_reg(context
);
183 call
->gs
= GS_reg(context
);
184 call
->ss
= SS_reg(context
);
188 /**********************************************************************
191 * This routine does the hard work of calling a callback procedure.
193 static void DPMI_CallRMCBProc( CONTEXT86
*context
, RMCB
*rmcb
, WORD flag
)
195 if (IS_SELECTOR_SYSTEM( rmcb
->proc_sel
)) {
196 /* Wine-internal RMCB, call directly */
197 ((RMCBPROC
)rmcb
->proc_ofs
)(context
);
203 INT_SetRealModeContext((REALMODECALL
*)PTR_SEG_OFF_TO_LIN( rmcb
->regs_sel
, rmcb
->regs_ofs
), context
);
204 ss
= SELECTOR_AllocBlock( DOSMEM_MemoryBase(0) + (DWORD
)(SS_reg(context
)<<4), 0x10000, SEGMENT_DATA
, FALSE
, FALSE
);
206 FIXME("untested!\n");
208 /* The called proc ends with an IRET, and takes these parameters:
209 * DS:ESI = pointer to real-mode SS:SP
210 * ES:EDI = pointer to real-mode call structure
212 * ES:EDI = pointer to real-mode call structure (may be a copy)
213 * It is the proc's responsibility to change the return CS:IP in the
214 * real-mode call structure. */
216 /* 32-bit DPMI client */
217 #if HAVE_FIXED_BROKEN_ASSEMBLER_BELOW
219 __asm__
__volatile__(
223 "movl %5,%%es\n" /* BAD: we are pushing potential stack
224 * parameters on an already modified
232 : "=g" (es
), "=D" (edi
), "=S" (_clobber
)
233 : "m" (rmcb
->proc_ofs
),
234 "g" (ss
), "g" (rmcb
->regs_sel
),
235 "S" (ESP_reg(context
)), "1" (rmcb
->regs_ofs
)
236 : "ecx", "edx", "ebp" );
237 /* BAD: uses too much registers which is starving the register
238 * alloc stage of gcc, especially in -fPIC.
241 FIXME("32 bit DPMI client unsupported.\n");
244 /* 16-bit DPMI client */
245 CONTEXT86 ctx
= *context
;
246 CS_reg(&ctx
) = rmcb
->proc_sel
;
247 EIP_reg(&ctx
) = rmcb
->proc_ofs
;
249 ESI_reg(&ctx
) = ESP_reg(context
);
250 ES_reg(&ctx
) = rmcb
->regs_sel
;
251 EDI_reg(&ctx
) = rmcb
->regs_ofs
;
252 Callbacks
->CallRegisterShortProc(&ctx
, 2);
256 SELECTOR_FreeBlock(ss
, 1);
257 INT_GetRealModeContext((REALMODECALL
*)PTR_SEG_OFF_TO_LIN( es
, edi
), context
);
259 ERR("RMCBs only implemented for i386\n");
265 /**********************************************************************
268 * This routine does the hard work of calling a real mode procedure.
270 int DPMI_CallRMProc( CONTEXT86
*context
, LPWORD stack
, int args
, int iret
)
276 #endif /* !MZ_SUPPORTED */
277 LPVOID addr
= NULL
; /* avoid gcc warning */
278 TDB
*pTask
= (TDB
*)GlobalLock16( GetCurrentTask() );
279 NE_MODULE
*pModule
= pTask
? NE_GetPtr( pTask
->hModule
) : NULL
;
281 int alloc
= 0, already
= 0;
284 GlobalUnlock16( GetCurrentTask() );
286 TRACE("EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n",
287 EAX_reg(context
), EBX_reg(context
), ECX_reg(context
), EDX_reg(context
) );
288 TRACE("ESI=%08lx EDI=%08lx ES=%04lx DS=%04lx CS:IP=%04lx:%04x, %d WORD arguments, %s\n",
289 ESI_reg(context
), EDI_reg(context
), ES_reg(context
), DS_reg(context
),
290 CS_reg(context
), LOWORD(EIP_reg(context
)), args
, iret
?"IRET":"FAR" );
294 /* there might be some code that just jumps to RMCBs or the like,
295 in which case following the jumps here might get us to a shortcut */
296 code
= CTX_SEG_OFF_TO_LIN(context
, CS_reg(context
), EIP_reg(context
));
298 case 0xe9: /* JMP NEAR */
299 EIP_reg(context
) += 3 + *(WORD
*)(code
+1);
300 /* yeah, I know these gotos don't look good... */
301 goto callrmproc_again
;
302 case 0xea: /* JMP FAR */
303 EIP_reg(context
) = *(WORD
*)(code
+1);
304 CS_reg(context
) = *(WORD
*)(code
+3);
305 /* ...but since the label is there anyway... */
306 goto callrmproc_again
;
307 case 0xeb: /* JMP SHORT */
308 EIP_reg(context
) += 2 + *(signed char *)(code
+1);
309 /* ...because of other gotos below, so... */
310 goto callrmproc_again
;
313 /* shortcut for chaining to internal interrupt handlers */
314 if ((CS_reg(context
) == 0xF000) && iret
) {
315 return INT_RealModeInterrupt( LOWORD(EIP_reg(context
))/4, context
);
318 /* shortcut for RMCBs */
319 CurrRMCB
= FirstRMCB
;
321 while (CurrRMCB
&& (HIWORD(CurrRMCB
->address
) != CS_reg(context
)))
322 CurrRMCB
= CurrRMCB
->next
;
325 if (!(CurrRMCB
|| pModule
->lpDosTask
)) {
326 FIXME("DPMI real-mode call using DOS VM task system, not fully tested!\n");
327 TRACE("creating VM86 task\n");
328 if (!MZ_InitTask( MZ_AllocDPMITask( pModule
->self
) )) {
329 ERR("could not setup VM86 task\n");
336 if (!SS_reg(context
)) {
337 alloc
= 1; /* allocate default stack */
338 stack16
= addr
= DOSMEM_GetBlock( pModule
->self
, 64, (UINT16
*)&(SS_reg(context
)) );
339 ESP_reg(context
) = 64-2;
342 ERR("could not allocate default stack\n");
346 stack16
= CTX_SEG_OFF_TO_LIN(context
, SS_reg(context
), ESP_reg(context
));
348 ESP_reg(context
) -= (args
+ (iret
?1:0)) * sizeof(WORD
);
350 stack16
= (LPWORD
) CURRENT_STACK16
;
353 if (args
) memcpy(stack16
, stack
, args
*sizeof(WORD
) );
354 /* push flags if iret */
357 *stack16
= LOWORD(EFL_reg(context
));
360 /* push return address (return to interrupt wrapper) */
361 *(--stack16
) = DPMI_wrap_seg
;
364 ESP_reg(context
) -= 2*sizeof(WORD
);
370 /* RMCB call, invoke protected-mode handler directly */
371 DPMI_CallRMCBProc(context
, CurrRMCB
, pModule
->lpDosTask
?pModule
->lpDosTask
->dpmi_flag
:0);
372 /* check if we returned to where we thought we would */
373 if ((CS_reg(context
) != DPMI_wrap_seg
) ||
374 (LOWORD(EIP_reg(context
)) != 0)) {
375 /* we need to continue at different address in real-mode space,
376 so we need to set it all up for real mode again */
377 goto callrmproc_again
;
381 #if 0 /* this was probably unnecessary */
382 /* push call address */
383 *(--stack16
) = CS_reg(context
);
384 *(--stack16
) = LOWORD(EIP_reg(context
));
386 ESP_reg(context
) -= 2*sizeof(WORD
);
387 /* set initial CS:IP to the wrapper's "lret" */
388 CS_reg(context
) = DPMI_wrap_seg
;
389 EIP_reg(context
) = 2;
391 TRACE("entering real mode...\n");
392 DOSVM_Enter( context
);
393 TRACE("returned from real-mode call\n");
395 addr
= CTX_SEG_OFF_TO_LIN(context
, CS_reg(context
), EIP_reg(context
));
396 sel
= SELECTOR_AllocBlock( addr
, 0x10000, SEGMENT_CODE
, FALSE
, FALSE
);
397 seg_addr
= PTR_SEG_OFF_TO_SEGPTR( sel
, 0 );
399 CS_reg(context
) = HIWORD(seg_addr
);
400 EIP_reg(context
) = LOWORD(seg_addr
);
401 EBP_reg(context
) = OFFSETOF( NtCurrentTeb()->cur_stack
)
402 + (WORD
)&((STACK16FRAME
*)0)->bp
;
403 Callbacks
->CallRegisterShortProc(context
, args
*sizeof(WORD
));
404 SELECTOR_FreeBlock(sel
, 1);
407 if (alloc
) DOSMEM_FreeBlock( pModule
->self
, addr
);
412 /**********************************************************************
415 static void CallRMInt( CONTEXT86
*context
)
417 CONTEXT86 realmode_ctx
;
418 FARPROC16 rm_int
= INT_GetRMHandler( BL_reg(context
) );
419 REALMODECALL
*call
= (REALMODECALL
*)PTR_SEG_OFF_TO_LIN( ES_reg(context
),
421 INT_GetRealModeContext( call
, &realmode_ctx
);
423 /* we need to check if a real-mode program has hooked the interrupt */
424 if (HIWORD(rm_int
)!=0xF000) {
425 /* yup, which means we need to switch to real mode... */
426 CS_reg(&realmode_ctx
) = HIWORD(rm_int
);
427 EIP_reg(&realmode_ctx
) = LOWORD(rm_int
);
428 if (DPMI_CallRMProc( &realmode_ctx
, NULL
, 0, TRUE
))
431 RESET_CFLAG(context
);
432 /* use the IP we have instead of BL_reg, in case some apps
433 decide to move interrupts around for whatever reason... */
434 if (INT_RealModeInterrupt( LOWORD(rm_int
)/4, &realmode_ctx
))
436 if (EFL_reg(context
)&1) {
437 FIXME("%02x: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n",
438 BL_reg(context
), EAX_reg(&realmode_ctx
), EBX_reg(&realmode_ctx
),
439 ECX_reg(&realmode_ctx
), EDX_reg(&realmode_ctx
));
440 FIXME(" ESI=%08lx EDI=%08lx DS=%04lx ES=%04lx\n",
441 ESI_reg(&realmode_ctx
), EDI_reg(&realmode_ctx
),
442 DS_reg(&realmode_ctx
), ES_reg(&realmode_ctx
) );
445 INT_SetRealModeContext( call
, &realmode_ctx
);
449 static void CallRMProc( CONTEXT86
*context
, int iret
)
451 REALMODECALL
*p
= (REALMODECALL
*)PTR_SEG_OFF_TO_LIN( ES_reg(context
), DI_reg(context
) );
454 TRACE("RealModeCall: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n",
455 p
->eax
, p
->ebx
, p
->ecx
, p
->edx
);
456 TRACE(" ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x, %d WORD arguments, %s\n",
457 p
->esi
, p
->edi
, p
->es
, p
->ds
, p
->cs
, p
->ip
, CX_reg(context
), iret
?"IRET":"FAR" );
459 if (!(p
->cs
) && !(p
->ip
)) { /* remove this check
460 if Int21/6501 case map function
461 has been implemented */
465 INT_GetRealModeContext(p
, &context16
);
466 DPMI_CallRMProc( &context16
, ((LPWORD
)PTR_SEG_OFF_TO_LIN(SS_reg(context
), LOWORD(ESP_reg(context
))))+3,
467 CX_reg(context
), iret
);
468 INT_SetRealModeContext(p
, &context16
);
472 static void WINAPI WINE_UNUSED
RMCallbackProc( RMCB
*rmcb
)
474 /* This routine should call DPMI_CallRMCBProc, but we don't have the
475 register structure available - this is easily fixed by going through
476 a Win16 register relay instead of calling RMCallbackProc "directly",
477 but I won't bother at this time. */
478 FIXME("not properly supported on your architecture!\n");
481 static RMCB
*DPMI_AllocRMCB( void )
483 RMCB
*NewRMCB
= HeapAlloc(GetProcessHeap(), 0, sizeof(RMCB
));
489 LPVOID RMCBmem
= DOSMEM_GetBlock(0, 4, &uParagraph
);
492 *p
++ = 0xcd; /* RMCB: */
493 *p
++ = 0x31; /* int $0x31 */
494 /* it is the called procedure's task to change the return CS:EIP
495 the DPMI 0.9 spec states that if it doesn't, it will be called again */
497 *p
++ = 0xfc; /* jmp RMCB */
499 LPVOID RMCBmem
= DOSMEM_GetBlock(0, 15, &uParagraph
);
502 *p
++ = 0x68; /* pushl */
503 *(LPVOID
*)p
= NewRMCB
;
505 *p
++ = 0x9a; /* lcall */
506 *(FARPROC16
*)p
= (FARPROC16
)RMCallbackProc
; /* FIXME: register relay */
508 *(WORD
*)p
= __get_cs();
510 *p
++=0xc3; /* lret (FIXME?) */
512 NewRMCB
->address
= MAKELONG(0, uParagraph
);
513 NewRMCB
->next
= FirstRMCB
;
520 static void AllocRMCB( CONTEXT86
*context
)
522 RMCB
*NewRMCB
= DPMI_AllocRMCB();
524 TRACE("Function to call: %04x:%04x\n", (WORD
)DS_reg(context
), SI_reg(context
) );
528 /* FIXME: if 32-bit DPMI client, use ESI and EDI */
529 NewRMCB
->proc_ofs
= SI_reg(context
);
530 NewRMCB
->proc_sel
= DS_reg(context
);
531 NewRMCB
->regs_ofs
= DI_reg(context
);
532 NewRMCB
->regs_sel
= ES_reg(context
);
533 SET_LOWORD( ECX_reg(context
), HIWORD(NewRMCB
->address
) );
534 SET_LOWORD( EDX_reg(context
), LOWORD(NewRMCB
->address
) );
538 SET_LOWORD( EAX_reg(context
), 0x8015 ); /* callback unavailable */
544 FARPROC16 WINAPI
DPMI_AllocInternalRMCB( RMCBPROC proc
)
546 RMCB
*NewRMCB
= DPMI_AllocRMCB();
549 NewRMCB
->proc_ofs
= (DWORD
)proc
;
550 NewRMCB
->proc_sel
= 0;
551 NewRMCB
->regs_ofs
= 0;
552 NewRMCB
->regs_sel
= 0;
553 return (FARPROC16
)(NewRMCB
->address
);
559 static int DPMI_FreeRMCB( DWORD address
)
561 RMCB
*CurrRMCB
= FirstRMCB
;
562 RMCB
*PrevRMCB
= NULL
;
564 while (CurrRMCB
&& (CurrRMCB
->address
!= address
))
567 CurrRMCB
= CurrRMCB
->next
;
572 PrevRMCB
->next
= CurrRMCB
->next
;
574 FirstRMCB
= CurrRMCB
->next
;
575 DOSMEM_FreeBlock(0, DOSMEM_MapRealToLinear(CurrRMCB
->address
));
576 HeapFree(GetProcessHeap(), 0, CurrRMCB
);
583 static void FreeRMCB( CONTEXT86
*context
)
585 FIXME("callback address: %04x:%04x\n",
586 CX_reg(context
), DX_reg(context
));
588 if (DPMI_FreeRMCB(MAKELONG(DX_reg(context
), CX_reg(context
)))) {
589 SET_LOWORD( EAX_reg(context
), 0x8024 ); /* invalid callback address */
595 void WINAPI
DPMI_FreeInternalRMCB( FARPROC16 proc
)
597 DPMI_FreeRMCB( (DWORD
)proc
);
602 /* (see loader/dos/module.c, function MZ_InitDPMI) */
604 static void StartPM( CONTEXT86
*context
, LPDOSTASK lpDosTask
)
606 char *base
= DOSMEM_MemoryBase(0);
607 UINT16 cs
, ss
, ds
, es
;
609 DWORD psp_ofs
= (DWORD
)(lpDosTask
->psp_seg
<<4);
610 PDB16
*psp
= (PDB16
*)(base
+ psp_ofs
);
611 HANDLE16 env_seg
= psp
->environment
;
614 RESET_CFLAG(context
);
615 lpDosTask
->dpmi_flag
= AX_reg(context
);
616 is32
= lpDosTask
->dpmi_flag
& 1;
617 /* our mode switch wrapper have placed the desired CS into DX */
618 cs
= SELECTOR_AllocBlock( base
+ (DWORD
)(DX_reg(context
)<<4), 0x10000, SEGMENT_CODE
, FALSE
, FALSE
);
619 /* due to a flaw in some CPUs (at least mine), it is best to mark stack segments as 32-bit if they
620 can be used in 32-bit code. Otherwise, these CPUs may not set the high word of esp during a
621 ring transition (from kernel code) to the 16-bit stack, and this causes trouble if executing
622 32-bit code using this stack. */
623 ss
= SELECTOR_AllocBlock( base
+ (DWORD
)(SS_reg(context
)<<4), 0x10000, SEGMENT_DATA
, is32
, FALSE
);
624 /* do the same for the data segments, just in case */
625 if (DS_reg(context
) == SS_reg(context
)) ds
= ss
;
626 else ds
= SELECTOR_AllocBlock( base
+ (DWORD
)(DS_reg(context
)<<4), 0x10000, SEGMENT_DATA
, is32
, FALSE
);
627 es
= SELECTOR_AllocBlock( base
+ psp_ofs
, 0x100, SEGMENT_DATA
, is32
, FALSE
);
628 /* convert environment pointer, as the spec says, but we're a bit lazy about the size here... */
629 psp
->environment
= SELECTOR_AllocBlock( base
+ (DWORD
)(env_seg
<<4),
630 0x10000, SEGMENT_DATA
, FALSE
, FALSE
);
633 CS_reg(&pm_ctx
) = lpDosTask
->dpmi_sel
;
634 /* our mode switch wrapper expects the new CS in DX, and the new SS in AX */
635 EAX_reg(&pm_ctx
) = ss
;
636 EDX_reg(&pm_ctx
) = cs
;
637 DS_reg(&pm_ctx
) = ds
;
638 ES_reg(&pm_ctx
) = es
;
642 TRACE("DOS program is now entering protected mode\n");
643 Callbacks
->CallRegisterShortProc(&pm_ctx
, 0);
645 /* in the current state of affairs, we won't ever actually return here... */
646 /* we should have int21/ah=4c do it someday, though... */
648 SELECTOR_FreeBlock(psp
->environment
, 1);
649 psp
->environment
= env_seg
;
650 SELECTOR_FreeBlock(es
, 1);
651 if (ds
!= ss
) SELECTOR_FreeBlock(ds
, 1);
652 SELECTOR_FreeBlock(ss
, 1);
653 SELECTOR_FreeBlock(cs
, 1);
656 /* DPMI Raw Mode Switch handler */
659 void WINAPI
DPMI_RawModeSwitch( SIGCONTEXT
*context
)
661 LPDOSTASK lpDosTask
= MZ_Current();
666 /* we could probably start a DPMI-only dosmod task here, but I doubt
667 anything other than real DOS apps want to call raw mode switch */
668 ERR("attempting raw mode switch without DOS task!\n");
671 /* initialize real-mode context as per spec */
672 memset(&rm_ctx
, 0, sizeof(rm_ctx
));
673 DS_reg(&rm_ctx
) = AX_sig(context
);
674 ES_reg(&rm_ctx
) = CX_sig(context
);
675 SS_reg(&rm_ctx
) = DX_sig(context
);
676 ESP_reg(&rm_ctx
) = EBX_sig(context
);
677 CS_reg(&rm_ctx
) = SI_sig(context
);
678 EIP_reg(&rm_ctx
) = EDI_sig(context
);
679 EBP_reg(&rm_ctx
) = EBP_sig(context
);
682 EFL_reg(&rm_ctx
) = EFL_sig(context
); /* at least we need the IF flag */
684 /* enter real mode again */
685 TRACE("re-entering real mode at %04lx:%04lx\n",
686 CS_reg(&rm_ctx
),EIP_reg(&rm_ctx
));
687 ret
= DOSVM_Enter( &rm_ctx
);
688 /* when the real-mode stuff call its mode switch address,
689 DOSVM_Enter will return and we will continue here */
692 /* if the sync was lost, there's no way to recover */
696 /* alter protected-mode context as per spec */
697 DS_sig(context
) = AX_reg(&rm_ctx
);
698 ES_sig(context
) = CX_reg(&rm_ctx
);
699 SS_sig(context
) = DX_reg(&rm_ctx
);
700 ESP_sig(context
) = EBX_reg(&rm_ctx
);
701 CS_sig(context
) = SI_reg(&rm_ctx
);
702 EIP_sig(context
) = EDI_reg(&rm_ctx
);
703 EBP_sig(context
) = EBP_reg(&rm_ctx
);
707 /* Return to new address and hope that we didn't mess up */
708 TRACE("re-entering protected mode at %04x:%08lx\n",
709 CS_sig(context
), EIP_sig(context
));
715 void WINAPI
DPMI_RawModeSwitch( SIGCONTEXT
*context
)
717 ERR("don't even think about DPMI raw mode switch without DOS support!\n");
723 #define DOS_APP_ISDOS(addr,base) ((addr) < 0x110000)
724 #define DOS_WINE_ISDOS(addr,base) (((addr) >= (base)) && ((addr) < (base) + 0x110000))
725 #define DOS_UC_APPTOWINE(addr,base) ((addr) + (base))
726 #define DOS_UC_WINETOAPP(addr,base) ((addr) - (base))
727 #define DOS_APPTOWINE(addr,base) (DOS_APP_ISDOS(addr,base) ? DOS_UC_APPTOWINE(addr,base) : (addr))
728 #define DOS_WINETOAPP(addr,base) (DOS_WINE_ISDOS(addr,base) ? DOS_UC_WINETOAPP(addr,base) : (addr))
729 #define DOS_BADLIMIT(addr,base,limit) \
730 ((limit == 0xffffffff) || /* disallow "fat DS" for now */ \
731 (DOS_WINE_ISDOS(addr,base) && \
732 ((addr) + (limit) > (base) + 0x110000)))
734 /**********************************************************************
737 * Handler for int 31h (DPMI).
740 void WINAPI
INT_Int31Handler( CONTEXT86
*context
)
743 * Note: For Win32s processes, the whole linear address space is
744 * shifted by 0x10000 relative to the OS linear address space.
745 * See the comment in msdos/vxd.c.
747 DWORD offset
= W32S_APPLICATION() ? W32S_OFFSET
: 0;
752 LPDOSTASK lpDosTask
= MZ_Current();
755 if (ISV86(context
) && lpDosTask
) {
756 /* Called from real mode, check if it's our wrapper */
757 TRACE("called from real mode\n");
758 if (CS_reg(context
)==lpDosTask
->dpmi_seg
) {
759 /* This is the protected mode switch */
760 StartPM(context
,lpDosTask
);
763 if (CS_reg(context
)==lpDosTask
->xms_seg
) {
764 /* This is the XMS driver entry point */
765 XMS_Handler(context
);
770 RMCB
*CurrRMCB
= FirstRMCB
;
772 while (CurrRMCB
&& (HIWORD(CurrRMCB
->address
) != CS_reg(context
)))
773 CurrRMCB
= CurrRMCB
->next
;
776 /* RMCB call, propagate to protected-mode handler */
777 DPMI_CallRMCBProc(context
, CurrRMCB
, lpDosTask
->dpmi_flag
);
784 RESET_CFLAG(context
);
785 switch(AX_reg(context
))
787 case 0x0000: /* Allocate LDT descriptors */
788 TRACE("allocate LDT descriptors (%d)\n",CX_reg(context
));
789 if (!(EAX_reg(context
) = AllocSelectorArray16( CX_reg(context
) )))
792 EAX_reg(context
) = 0x8011; /* descriptor unavailable */
795 TRACE("success, array starts at 0x%04x\n",AX_reg(context
));
798 case 0x0001: /* Free LDT descriptor */
799 TRACE("free LDT descriptor (0x%04x)\n",BX_reg(context
));
800 if (FreeSelector16( BX_reg(context
) ))
802 EAX_reg(context
) = 0x8022; /* invalid selector */
807 /* If a segment register contains the selector being freed, */
808 /* set it to zero. */
809 if (!((DS_reg(context
)^BX_reg(context
)) & ~3)) DS_reg(context
) = 0;
810 if (!((ES_reg(context
)^BX_reg(context
)) & ~3)) ES_reg(context
) = 0;
811 if (!((FS_reg(context
)^BX_reg(context
)) & ~3)) FS_reg(context
) = 0;
812 if (!((GS_reg(context
)^BX_reg(context
)) & ~3)) GS_reg(context
) = 0;
816 case 0x0002: /* Real mode segment to descriptor */
817 TRACE("real mode segment to descriptor (0x%04x)\n",BX_reg(context
));
819 WORD entryPoint
= 0; /* KERNEL entry point for descriptor */
820 switch(BX_reg(context
))
822 case 0x0000: entryPoint
= 183; break; /* __0000H */
823 case 0x0040: entryPoint
= 193; break; /* __0040H */
824 case 0xa000: entryPoint
= 174; break; /* __A000H */
825 case 0xb000: entryPoint
= 181; break; /* __B000H */
826 case 0xb800: entryPoint
= 182; break; /* __B800H */
827 case 0xc000: entryPoint
= 195; break; /* __C000H */
828 case 0xd000: entryPoint
= 179; break; /* __D000H */
829 case 0xe000: entryPoint
= 190; break; /* __E000H */
830 case 0xf000: entryPoint
= 194; break; /* __F000H */
832 EAX_reg(context
) = DOSMEM_AllocSelector(BX_reg(context
));
836 EAX_reg(context
) = LOWORD(NE_GetEntryPoint( GetModuleHandle16( "KERNEL" ),
841 case 0x0003: /* Get next selector increment */
842 TRACE("get selector increment (__AHINCR)\n");
843 EAX_reg(context
) = __AHINCR
;
846 case 0x0004: /* Lock selector (not supported) */
847 FIXME("lock selector not supported\n");
848 EAX_reg(context
) = 0; /* FIXME: is this a correct return value? */
851 case 0x0005: /* Unlock selector (not supported) */
852 FIXME("unlock selector not supported\n");
853 EAX_reg(context
) = 0; /* FIXME: is this a correct return value? */
856 case 0x0006: /* Get selector base address */
857 TRACE("get selector base address (0x%04x)\n",BX_reg(context
));
858 if (!(dw
= GetSelectorBase( BX_reg(context
) )))
860 EAX_reg(context
) = 0x8022; /* invalid selector */
867 DWORD base
= (DWORD
)DOSMEM_MemoryBase(lpDosTask
->hModule
);
868 dw
= DOS_WINETOAPP(dw
, base
);
871 CX_reg(context
) = HIWORD(W32S_WINE2APP(dw
, offset
));
872 DX_reg(context
) = LOWORD(W32S_WINE2APP(dw
, offset
));
876 case 0x0007: /* Set selector base address */
877 TRACE("set selector base address (0x%04x,0x%08lx)\n",
879 W32S_APP2WINE(MAKELONG(DX_reg(context
),CX_reg(context
)), offset
));
880 dw
= W32S_APP2WINE(MAKELONG(DX_reg(context
), CX_reg(context
)), offset
);
883 DWORD base
= (DWORD
)DOSMEM_MemoryBase(lpDosTask
->hModule
);
884 dw
= DOS_APPTOWINE(dw
, base
);
887 SetSelectorBase(BX_reg(context
), dw
);
890 case 0x0008: /* Set selector limit */
891 TRACE("set selector limit (0x%04x,0x%08lx)\n",BX_reg(context
),MAKELONG(DX_reg(context
),CX_reg(context
)));
892 dw
= MAKELONG( DX_reg(context
), CX_reg(context
) );
895 DWORD base
= (DWORD
)DOSMEM_MemoryBase(lpDosTask
->hModule
);
896 DWORD sbase
= GetSelectorBase( BX_reg(context
) );
898 /* the app has set the limit without setting the base,
899 * it must be relying on that the default should be DOS space;
900 * so set the base address now */
901 SetSelectorBase( BX_reg(context
), sbase
= base
);
902 if (dw
== 0xffffffff) {
903 /* djgpp does this without checking (in _dos_ds setup, crt1.c),
904 * so we have to override the limit here */
908 if (DOS_BADLIMIT(sbase
, base
, dw
)) {
909 AX_reg(context
) = 0x8021; /* invalid value */
915 SetSelectorLimit16( BX_reg(context
), dw
);
918 case 0x0009: /* Set selector access rights */
919 TRACE("set selector access rights(0x%04x,0x%04x)\n",BX_reg(context
),CX_reg(context
));
920 SelectorAccessRights16( BX_reg(context
), 1, CX_reg(context
) );
923 case 0x000a: /* Allocate selector alias */
924 TRACE("allocate selector alias (0x%04x)\n",BX_reg(context
));
925 if (!(AX_reg(context
) = AllocCStoDSAlias16( BX_reg(context
) )))
927 AX_reg(context
) = 0x8011; /* descriptor unavailable */
932 case 0x000b: /* Get descriptor */
933 TRACE("get descriptor (0x%04x)\n",BX_reg(context
));
936 LDT_GetEntry( SELECTOR_TO_ENTRY( BX_reg(context
) ), &entry
);
939 DWORD base
= (DWORD
)DOSMEM_MemoryBase(lpDosTask
->hModule
);
940 entry
.base
= DOS_WINETOAPP(entry
.base
, base
);
943 entry
.base
= W32S_WINE2APP(entry
.base
, offset
);
945 /* FIXME: should use ES:EDI for 32-bit clients */
946 LDT_EntryToBytes( PTR_SEG_OFF_TO_LIN( ES_reg(context
),
947 DI_reg(context
) ), &entry
);
951 case 0x000c: /* Set descriptor */
952 TRACE("set descriptor (0x%04x)\n",BX_reg(context
));
955 LDT_BytesToEntry( PTR_SEG_OFF_TO_LIN( ES_reg(context
),
956 DI_reg(context
) ), &entry
);
957 entry
.base
= W32S_APP2WINE(entry
.base
, offset
);
960 DWORD base
= (DWORD
)DOSMEM_MemoryBase(lpDosTask
->hModule
);
961 entry
.base
= DOS_APPTOWINE(entry
.base
, base
);
962 if (DOS_BADLIMIT(entry
.base
, base
, entry
.limit
)) {
963 AX_reg(context
) = 0x8021; /* invalid value */
970 LDT_SetEntry( SELECTOR_TO_ENTRY( BX_reg(context
) ), &entry
);
974 case 0x000d: /* Allocate specific LDT descriptor */
975 FIXME("allocate descriptor (0x%04x), stub!\n",BX_reg(context
));
976 AX_reg(context
) = 0x8011; /* descriptor unavailable */
979 case 0x0100: /* Allocate DOS memory block */
980 TRACE("allocate DOS memory block (0x%x paragraphs)\n",BX_reg(context
));
981 dw
= GlobalDOSAlloc16((DWORD
)BX_reg(context
)<<4);
983 AX_reg(context
) = HIWORD(dw
);
984 DX_reg(context
) = LOWORD(dw
);
986 AX_reg(context
) = 0x0008; /* insufficient memory */
987 BX_reg(context
) = DOSMEM_Available(0)>>4;
991 case 0x0101: /* Free DOS memory block */
992 TRACE("free DOS memory block (0x%04x)\n",DX_reg(context
));
993 dw
= GlobalDOSFree16(DX_reg(context
));
995 AX_reg(context
) = 0x0009; /* memory block address invalid */
999 case 0x0200: /* get real mode interrupt vector */
1000 FIXME("get realmode interupt vector(0x%02x) unimplemented.\n",
1004 case 0x0201: /* set real mode interrupt vector */
1005 FIXME("set realmode interupt vector(0x%02x,0x%04x:0x%04x) unimplemented\n", BL_reg(context
),CX_reg(context
),DX_reg(context
));
1008 case 0x0204: /* Get protected mode interrupt vector */
1009 TRACE("get protected mode interrupt handler (0x%02x), stub!\n",BL_reg(context
));
1010 dw
= (DWORD
)INT_GetPMHandler( BL_reg(context
) );
1011 CX_reg(context
) = HIWORD(dw
);
1012 DX_reg(context
) = LOWORD(dw
);
1015 case 0x0205: /* Set protected mode interrupt vector */
1016 TRACE("set protected mode interrupt handler (0x%02x,%p), stub!\n",
1017 BL_reg(context
),PTR_SEG_OFF_TO_LIN(CX_reg(context
),DX_reg(context
)));
1018 INT_SetPMHandler( BL_reg(context
),
1019 (FARPROC16
)PTR_SEG_OFF_TO_SEGPTR( CX_reg(context
),
1023 case 0x0300: /* Simulate real mode interrupt */
1024 CallRMInt( context
);
1027 case 0x0301: /* Call real mode procedure with far return */
1028 CallRMProc( context
, FALSE
);
1031 case 0x0302: /* Call real mode procedure with interrupt return */
1032 CallRMProc( context
, TRUE
);
1035 case 0x0303: /* Allocate Real Mode Callback Address */
1036 AllocRMCB( context
);
1039 case 0x0304: /* Free Real Mode Callback Address */
1040 FreeRMCB( context
);
1043 case 0x0305: /* Get State Save/Restore Addresses */
1044 TRACE("get state save/restore addresses\n");
1045 /* we probably won't need this kind of state saving */
1046 AX_reg(context
) = 0;
1047 /* real mode: just point to the lret */
1048 BX_reg(context
) = DPMI_wrap_seg
;
1049 ECX_reg(context
) = 2;
1050 /* protected mode: don't have any handler yet... */
1051 FIXME("no protected-mode dummy state save/restore handler yet\n");
1052 SI_reg(context
) = 0;
1053 EDI_reg(context
) = 0;
1056 case 0x0306: /* Get Raw Mode Switch Addresses */
1057 TRACE("get raw mode switch addresses\n");
1059 /* real mode, point to standard DPMI return wrapper */
1060 BX_reg(context
) = DPMI_wrap_seg
;
1061 ECX_reg(context
) = 0;
1062 /* protected mode, point to DPMI call wrapper */
1063 SI_reg(context
) = lpDosTask
->dpmi_sel
;
1064 EDI_reg(context
) = 8; /* offset of the INT 0x31 call */
1066 ERR("win app attempting to get raw mode switch!\n");
1067 AX_reg(context
) = 0x8001; /* unsupported function */
1071 case 0x0400: /* Get DPMI version */
1072 TRACE("get DPMI version\n");
1077 AX_reg(context
) = 0x005a; /* DPMI version 0.90 */
1078 BX_reg(context
) = 0x0005; /* Flags: 32-bit, virtual memory */
1079 CL_reg(context
) = si
.wProcessorLevel
;
1080 DX_reg(context
) = 0x0102; /* Master/slave interrupt controller base*/
1083 case 0x0500: /* Get free memory information */
1084 TRACE("get free memory information\n");
1088 mmi
.dwSize
= sizeof(mmi
);
1090 ptr
= (BYTE
*)PTR_SEG_OFF_TO_LIN(ES_reg(context
),DI_reg(context
));
1091 /* the layout is just the same as MEMMANINFO, but without
1094 memcpy(ptr
,((char*)&mmi
)+4,sizeof(mmi
)-4);
1097 case 0x0501: /* Allocate memory block */
1098 TRACE("allocate memory block (%ld)\n",MAKELONG(CX_reg(context
),BX_reg(context
)));
1099 if (!(ptr
= (BYTE
*)DPMI_xalloc(MAKELONG(CX_reg(context
), BX_reg(context
)))))
1101 AX_reg(context
) = 0x8012; /* linear memory not available */
1104 BX_reg(context
) = SI_reg(context
) = HIWORD(W32S_WINE2APP(ptr
, offset
));
1105 CX_reg(context
) = DI_reg(context
) = LOWORD(W32S_WINE2APP(ptr
, offset
));
1109 case 0x0502: /* Free memory block */
1110 TRACE("free memory block (0x%08lx)\n",
1111 W32S_APP2WINE(MAKELONG(DI_reg(context
),SI_reg(context
)), offset
));
1112 DPMI_xfree( (void *)W32S_APP2WINE(MAKELONG(DI_reg(context
),
1113 SI_reg(context
)), offset
) );
1116 case 0x0503: /* Resize memory block */
1117 TRACE("resize memory block (0x%08lx,%ld)\n",
1118 W32S_APP2WINE(MAKELONG(DI_reg(context
),SI_reg(context
)), offset
),
1119 MAKELONG(CX_reg(context
),BX_reg(context
)));
1120 if (!(ptr
= (BYTE
*)DPMI_xrealloc(
1121 (void *)W32S_APP2WINE(MAKELONG(DI_reg(context
),SI_reg(context
)), offset
),
1122 MAKELONG(CX_reg(context
),BX_reg(context
)))))
1124 AX_reg(context
) = 0x8012; /* linear memory not available */
1127 BX_reg(context
) = SI_reg(context
) = HIWORD(W32S_WINE2APP(ptr
, offset
));
1128 CX_reg(context
) = DI_reg(context
) = LOWORD(W32S_WINE2APP(ptr
, offset
));
1132 case 0x0507: /* Modify page attributes */
1133 FIXME("modify page attributes unimplemented\n");
1134 break; /* Just ignore it */
1136 case 0x0600: /* Lock linear region */
1137 FIXME("lock linear region unimplemented\n");
1138 break; /* Just ignore it */
1140 case 0x0601: /* Unlock linear region */
1141 FIXME("unlock linear region unimplemented\n");
1142 break; /* Just ignore it */
1144 case 0x0602: /* Unlock real-mode region */
1145 FIXME("unlock realmode region unimplemented\n");
1146 break; /* Just ignore it */
1148 case 0x0603: /* Lock real-mode region */
1149 FIXME("lock realmode region unimplemented\n");
1150 break; /* Just ignore it */
1152 case 0x0604: /* Get page size */
1153 TRACE("get pagesize\n");
1154 BX_reg(context
) = 0;
1155 CX_reg(context
) = VIRTUAL_GetPageSize();
1158 case 0x0702: /* Mark page as demand-paging candidate */
1159 FIXME("mark page as demand-paging candidate\n");
1160 break; /* Just ignore it */
1162 case 0x0703: /* Discard page contents */
1163 FIXME("discard page contents\n");
1164 break; /* Just ignore it */
1166 case 0x0800: /* Physical address mapping */
1167 FIXME("map real to linear (0x%08lx)\n",MAKELONG(CX_reg(context
),BX_reg(context
)));
1168 if(!(ptr
=DOSMEM_MapRealToLinear(MAKELONG(CX_reg(context
),BX_reg(context
)))))
1170 AX_reg(context
) = 0x8021;
1175 BX_reg(context
) = HIWORD(W32S_WINE2APP(ptr
, offset
));
1176 CX_reg(context
) = LOWORD(W32S_WINE2APP(ptr
, offset
));
1177 RESET_CFLAG(context
);
1182 INT_BARF( context
, 0x31 );
1183 AX_reg(context
) = 0x8001; /* unsupported function */