2 * Emulation of privileged instructions
4 * Copyright 1995 Alexandre Julliard
5 * Copyright 2005 Ivan Leo Puoti
6 * Copyright 2005 Laurent Pinchart
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
24 #include "wine/port.h"
33 #include "wine/winuser16.h"
35 #include "wine/debug.h"
36 #include "kernel_private.h"
37 #include "kernel16_private.h"
38 #include "wine/exception.h"
40 WINE_DEFAULT_DEBUG_CHANNEL(int);
41 WINE_DECLARE_DEBUG_CHANNEL(io
);
43 /* macros to set parts of a DWORD */
44 #define SET_LOWORD(dw,val) ((dw) = ((dw) & 0xffff0000) | LOWORD(val))
45 #define SET_LOBYTE(dw,val) ((dw) = ((dw) & 0xffffff00) | LOBYTE(val))
46 #define ADD_LOWORD(dw,val) ((dw) = ((dw) & 0xffff0000) | LOWORD((DWORD)(dw)+(val)))
47 #define ISV86(context) ((context)->EFlags & 0x00020000)
49 static inline void add_stack( CONTEXT86
*context
, int offset
)
51 if (ISV86(context
) || !IS_SELECTOR_32BIT(context
->SegSs
))
52 ADD_LOWORD( context
->Esp
, offset
);
54 context
->Esp
+= offset
;
57 static inline void *make_ptr( CONTEXT86
*context
, DWORD seg
, DWORD off
, int long_addr
)
59 if (ISV86(context
)) return (void *)((seg
<< 4) + LOWORD(off
));
60 if (wine_ldt_is_system(seg
)) return (void *)off
;
61 if (!long_addr
) off
= LOWORD(off
);
62 return (char *) MapSL( MAKESEGPTR( seg
, 0 ) ) + off
;
65 static inline void *get_stack( CONTEXT86
*context
)
67 if (ISV86(context
)) return (void *)((context
->SegSs
<< 4) + LOWORD(context
->Esp
));
68 return wine_ldt_get_ptr( context
->SegSs
, context
->Esp
);
79 static LDT_ENTRY idt
[256];
81 static inline struct idtr
get_idtr(void)
84 #if defined(__i386__) && defined(__GNUC__)
85 __asm__( "sidtl %0" : "=m" (ret
) );
87 ret
.base
= (BYTE
*)idt
;
88 ret
.limit
= sizeof(idt
) - 1;
94 /***********************************************************************
95 * INSTR_ReplaceSelector
97 * Try to replace an invalid selector by a valid one.
98 * The only selector where it is allowed to do "mov ax,40;mov es,ax"
99 * is the so called 'bimodal' selector 0x40, which points to the BIOS
100 * data segment. Used by (at least) Borland products (and programs compiled
101 * using Borland products).
103 * See Undocumented Windows, Chapter 5, __0040.
105 static BOOL
INSTR_ReplaceSelector( CONTEXT86
*context
, WORD
*sel
)
109 *sel
= DOSMEM_BiosDataSeg
;
112 return FALSE
; /* Can't replace selector, crashdump */
116 /* store an operand into a register */
117 static void store_reg( CONTEXT86
*context
, BYTE regmodrm
, const BYTE
*addr
, int long_op
)
119 switch((regmodrm
>> 3) & 7)
122 if (long_op
) context
->Eax
= *(const DWORD
*)addr
;
123 else SET_LOWORD(context
->Eax
, *(const WORD
*)addr
);
126 if (long_op
) context
->Ecx
= *(const DWORD
*)addr
;
127 else SET_LOWORD(context
->Ecx
, *(const WORD
*)addr
);
130 if (long_op
) context
->Edx
= *(const DWORD
*)addr
;
131 else SET_LOWORD(context
->Edx
, *(const WORD
*)addr
);
134 if (long_op
) context
->Ebx
= *(const DWORD
*)addr
;
135 else SET_LOWORD(context
->Ebx
, *(const WORD
*)addr
);
138 if (long_op
) context
->Esp
= *(const DWORD
*)addr
;
139 else SET_LOWORD(context
->Esp
, *(const WORD
*)addr
);
142 if (long_op
) context
->Ebp
= *(const DWORD
*)addr
;
143 else SET_LOWORD(context
->Ebp
, *(const WORD
*)addr
);
146 if (long_op
) context
->Esi
= *(const DWORD
*)addr
;
147 else SET_LOWORD(context
->Esi
, *(const WORD
*)addr
);
150 if (long_op
) context
->Edi
= *(const DWORD
*)addr
;
151 else SET_LOWORD(context
->Edi
, *(const WORD
*)addr
);
156 /***********************************************************************
157 * INSTR_GetOperandAddr
159 * Return the address of an instruction operand (from the mod/rm byte).
161 static BYTE
*INSTR_GetOperandAddr( CONTEXT86
*context
, BYTE
*instr
,
162 int long_addr
, int segprefix
, int *len
)
164 int mod
, rm
, base
= 0, index
= 0, ss
= 0, seg
= 0, off
;
167 #define GET_VAL(val,type) \
168 { *val = *(type *)instr; instr += sizeof(type); *len += sizeof(type); }
171 GET_VAL( &mod
, BYTE
);
179 case 0: return (BYTE
*)&context
->Eax
;
180 case 1: return (BYTE
*)&context
->Ecx
;
181 case 2: return (BYTE
*)&context
->Edx
;
182 case 3: return (BYTE
*)&context
->Ebx
;
183 case 4: return (BYTE
*)&context
->Esp
;
184 case 5: return (BYTE
*)&context
->Ebp
;
185 case 6: return (BYTE
*)&context
->Esi
;
186 case 7: return (BYTE
*)&context
->Edi
;
195 GET_VAL( &sib
, BYTE
);
200 case 0: index
= context
->Eax
; break;
201 case 1: index
= context
->Ecx
; break;
202 case 2: index
= context
->Edx
; break;
203 case 3: index
= context
->Ebx
; break;
204 case 4: index
= 0; break;
205 case 5: index
= context
->Ebp
; break;
206 case 6: index
= context
->Esi
; break;
207 case 7: index
= context
->Edi
; break;
213 case 0: base
= context
->Eax
; seg
= context
->SegDs
; break;
214 case 1: base
= context
->Ecx
; seg
= context
->SegDs
; break;
215 case 2: base
= context
->Edx
; seg
= context
->SegDs
; break;
216 case 3: base
= context
->Ebx
; seg
= context
->SegDs
; break;
217 case 4: base
= context
->Esp
; seg
= context
->SegSs
; break;
218 case 5: base
= context
->Ebp
; seg
= context
->SegSs
; break;
219 case 6: base
= context
->Esi
; seg
= context
->SegDs
; break;
220 case 7: base
= context
->Edi
; seg
= context
->SegDs
; break;
225 if (rm
== 5) /* special case: ds:(disp32) */
227 GET_VAL( &base
, DWORD
);
228 seg
= context
->SegDs
;
232 case 1: /* 8-bit disp */
233 GET_VAL( &off
, BYTE
);
234 base
+= (signed char)off
;
237 case 2: /* 32-bit disp */
238 GET_VAL( &off
, DWORD
);
239 base
+= (signed long)off
;
243 else /* short address */
247 case 0: /* ds:(bx,si) */
248 base
= LOWORD(context
->Ebx
) + LOWORD(context
->Esi
);
249 seg
= context
->SegDs
;
251 case 1: /* ds:(bx,di) */
252 base
= LOWORD(context
->Ebx
) + LOWORD(context
->Edi
);
253 seg
= context
->SegDs
;
255 case 2: /* ss:(bp,si) */
256 base
= LOWORD(context
->Ebp
) + LOWORD(context
->Esi
);
257 seg
= context
->SegSs
;
259 case 3: /* ss:(bp,di) */
260 base
= LOWORD(context
->Ebp
) + LOWORD(context
->Edi
);
261 seg
= context
->SegSs
;
263 case 4: /* ds:(si) */
264 base
= LOWORD(context
->Esi
);
265 seg
= context
->SegDs
;
267 case 5: /* ds:(di) */
268 base
= LOWORD(context
->Edi
);
269 seg
= context
->SegDs
;
271 case 6: /* ss:(bp) */
272 base
= LOWORD(context
->Ebp
);
273 seg
= context
->SegSs
;
275 case 7: /* ds:(bx) */
276 base
= LOWORD(context
->Ebx
);
277 seg
= context
->SegDs
;
284 if (rm
== 6) /* special case: ds:(disp16) */
286 GET_VAL( &base
, WORD
);
287 seg
= context
->SegDs
;
291 case 1: /* 8-bit disp */
292 GET_VAL( &off
, BYTE
);
293 base
+= (signed char)off
;
296 case 2: /* 16-bit disp */
297 GET_VAL( &off
, WORD
);
298 base
+= (signed short)off
;
303 if (segprefix
!= -1) seg
= segprefix
;
305 /* Make sure the segment and offset are valid */
306 if (wine_ldt_is_system(seg
)) return (BYTE
*)(base
+ (index
<< ss
));
307 if ((seg
& 7) != 7) return NULL
;
308 wine_ldt_get_entry( seg
, &entry
);
309 if (wine_ldt_is_empty( &entry
)) return NULL
;
310 if (wine_ldt_get_limit(&entry
) < (base
+ (index
<< ss
))) return NULL
;
311 return (BYTE
*)wine_ldt_get_base(&entry
) + base
+ (index
<< ss
);
316 /***********************************************************************
319 * Emulate the LDS (and LES,LFS,etc.) instruction.
321 static BOOL
INSTR_EmulateLDS( CONTEXT86
*context
, BYTE
*instr
, int long_op
,
322 int long_addr
, int segprefix
, int *len
)
325 BYTE
*regmodrm
= instr
+ 1 + (*instr
== 0x0f);
326 BYTE
*addr
= INSTR_GetOperandAddr( context
, regmodrm
,
327 long_addr
, segprefix
, len
);
329 return FALSE
; /* Unable to emulate it */
330 seg
= *(WORD
*)(addr
+ (long_op
? 4 : 2));
332 if (!INSTR_ReplaceSelector( context
, &seg
))
333 return FALSE
; /* Unable to emulate it */
335 /* Now store the offset in the correct register */
337 store_reg( context
, *regmodrm
, addr
, long_op
);
339 /* Store the correct segment in the segment register */
343 case 0xc4: context
->SegEs
= seg
; break; /* les */
344 case 0xc5: context
->SegDs
= seg
; break; /* lds */
345 case 0x0f: switch(instr
[1])
347 case 0xb2: context
->SegSs
= seg
; break; /* lss */
348 case 0xb4: context
->SegFs
= seg
; break; /* lfs */
349 case 0xb5: context
->SegGs
= seg
; break; /* lgs */
354 /* Add the opcode size to the total length */
356 *len
+= 1 + (*instr
== 0x0f);
360 /***********************************************************************
363 * input on an I/O port
365 static DWORD
INSTR_inport( WORD port
, int size
, CONTEXT86
*context
)
369 if (!winedos
.inport
) load_winedos();
370 if (winedos
.inport
) res
= winedos
.inport( port
, size
);
377 TRACE_(io
)( "0x%x < %02x @ %04x:%04x\n", port
, LOBYTE(res
),
378 (WORD
)context
->SegCs
, LOWORD(context
->Eip
));
381 TRACE_(io
)( "0x%x < %04x @ %04x:%04x\n", port
, LOWORD(res
),
382 (WORD
)context
->SegCs
, LOWORD(context
->Eip
));
385 TRACE_(io
)( "0x%x < %08x @ %04x:%04x\n", port
, res
,
386 (WORD
)context
->SegCs
, LOWORD(context
->Eip
));
394 /***********************************************************************
397 * output on an I/O port
399 static void INSTR_outport( WORD port
, int size
, DWORD val
, CONTEXT86
*context
)
401 if (!winedos
.outport
) load_winedos();
402 if (winedos
.outport
) winedos
.outport( port
, size
, val
);
409 TRACE_(io
)("0x%x > %02x @ %04x:%04x\n", port
, LOBYTE(val
),
410 (WORD
)context
->SegCs
, LOWORD(context
->Eip
));
413 TRACE_(io
)("0x%x > %04x @ %04x:%04x\n", port
, LOWORD(val
),
414 (WORD
)context
->SegCs
, LOWORD(context
->Eip
));
417 TRACE_(io
)("0x%x > %08x @ %04x:%04x\n", port
, val
,
418 (WORD
)context
->SegCs
, LOWORD(context
->Eip
));
425 /***********************************************************************
426 * __wine_emulate_instruction
428 * Emulate a privileged instruction.
429 * Returns exception continuation status.
431 DWORD
__wine_emulate_instruction( EXCEPTION_RECORD
*rec
, CONTEXT86
*context
)
433 int prefix
, segprefix
, prefixlen
, len
, repX
, long_op
, long_addr
;
436 long_op
= long_addr
= (!ISV86(context
) && IS_SELECTOR_32BIT(context
->SegCs
));
437 instr
= make_ptr( context
, context
->SegCs
, context
->Eip
, TRUE
);
438 if (!instr
) return ExceptionContinueSearch
;
440 /* First handle any possible prefix */
442 segprefix
= -1; /* no prefix */
451 segprefix
= context
->SegCs
;
454 segprefix
= context
->SegSs
;
457 segprefix
= context
->SegDs
;
460 segprefix
= context
->SegEs
;
463 segprefix
= context
->SegFs
;
466 segprefix
= context
->SegGs
;
469 long_op
= !long_op
; /* opcode size prefix */
472 long_addr
= !long_addr
; /* addr size prefix */
474 case 0xf0: /* lock */
476 case 0xf2: /* repne */
479 case 0xf3: /* repe */
483 prefix
= 0; /* no more prefixes */
493 /* Now look at the actual instruction */
497 case 0x07: /* pop es */
498 case 0x17: /* pop ss */
499 case 0x1f: /* pop ds */
501 WORD seg
= *(WORD
*)get_stack( context
);
502 if (INSTR_ReplaceSelector( context
, &seg
))
506 case 0x07: context
->SegEs
= seg
; break;
507 case 0x17: context
->SegSs
= seg
; break;
508 case 0x1f: context
->SegDs
= seg
; break;
510 add_stack(context
, long_op
? 4 : 2);
511 context
->Eip
+= prefixlen
+ 1;
512 return ExceptionContinueExecution
;
515 break; /* Unable to emulate it */
517 case 0x0f: /* extended instruction */
520 case 0x22: /* mov eax, crX */
524 ERR("mov eax,cr0 at 0x%08x, EAX=0x%08x\n",
525 context
->Eip
,context
->Eax
);
526 context
->Eip
+= prefixlen
+3;
527 return ExceptionContinueExecution
;
529 break; /*fallthrough to bad instruction handling */
531 break; /*fallthrough to bad instruction handling */
532 case 0x20: /* mov crX, eax */
535 case 0xe0: /* mov cr4, eax */
536 /* CR4 register . See linux/arch/i386/mm/init.c, X86_CR4_ defs
537 * bit 0: VME Virtual Mode Exception ?
538 * bit 1: PVI Protected mode Virtual Interrupt
539 * bit 2: TSD Timestamp disable
540 * bit 3: DE Debugging extensions
541 * bit 4: PSE Page size extensions
542 * bit 5: PAE Physical address extension
543 * bit 6: MCE Machine check enable
544 * bit 7: PGE Enable global pages
545 * bit 8: PCE Enable performance counters at IPL3
547 ERR("mov cr4,eax at 0x%08x\n",context
->Eip
);
549 context
->Eip
+= prefixlen
+3;
550 return ExceptionContinueExecution
;
551 case 0xc0: /* mov cr0, eax */
552 ERR("mov cr0,eax at 0x%08x\n",context
->Eip
);
553 context
->Eax
= 0x10; /* FIXME: set more bits ? */
554 context
->Eip
+= prefixlen
+3;
555 return ExceptionContinueExecution
;
556 default: /* fallthrough to illegal instruction */
559 /* fallthrough to illegal instruction */
561 case 0x21: /* mov drX, eax */
564 case 0xc8: /* mov dr1, eax */
565 TRACE("mov dr1,eax at 0x%08x\n",context
->Eip
);
566 context
->Eax
= context
->Dr1
;
567 context
->Eip
+= prefixlen
+3;
568 return ExceptionContinueExecution
;
569 case 0xf8: /* mov dr7, eax */
570 TRACE("mov dr7,eax at 0x%08x\n",context
->Eip
);
571 context
->Eax
= 0x400;
572 context
->Eip
+= prefixlen
+3;
573 return ExceptionContinueExecution
;
575 ERR("Unsupported DR register, eip+2 is %02x\n", instr
[2]);
576 /* fallthrough to illegal instruction */
578 case 0x23: /* mov eax drX */
581 case 0xc8: /* mov eax, dr1 */
582 context
->Dr1
= context
->Eax
;
583 context
->Eip
+= prefixlen
+3;
584 return ExceptionContinueExecution
;
586 ERR("Unsupported DR register, eip+2 is %02x\n", instr
[2]);
587 /* fallthrough to illegal instruction */
589 case 0xa1: /* pop fs */
591 WORD seg
= *(WORD
*)get_stack( context
);
592 if (INSTR_ReplaceSelector( context
, &seg
))
594 context
->SegFs
= seg
;
595 add_stack(context
, long_op
? 4 : 2);
596 context
->Eip
+= prefixlen
+ 2;
597 return ExceptionContinueExecution
;
601 case 0xa9: /* pop gs */
603 WORD seg
= *(WORD
*)get_stack( context
);
604 if (INSTR_ReplaceSelector( context
, &seg
))
606 context
->SegGs
= seg
;
607 add_stack(context
, long_op
? 4 : 2);
608 context
->Eip
+= prefixlen
+ 2;
609 return ExceptionContinueExecution
;
613 case 0xb2: /* lss addr,reg */
614 case 0xb4: /* lfs addr,reg */
615 case 0xb5: /* lgs addr,reg */
616 if (INSTR_EmulateLDS( context
, instr
, long_op
,
617 long_addr
, segprefix
, &len
))
619 context
->Eip
+= prefixlen
+ len
;
620 return ExceptionContinueExecution
;
624 break; /* Unable to emulate it */
626 case 0x6c: /* insb */
627 case 0x6d: /* insw/d */
628 case 0x6e: /* outsb */
629 case 0x6f: /* outsw/d */
631 int typ
= *instr
; /* Just in case it's overwritten. */
632 int outp
= (typ
>= 0x6e);
633 unsigned long count
= repX
?
634 (long_addr
? context
->Ecx
: LOWORD(context
->Ecx
)) : 1;
635 int opsize
= (typ
& 1) ? (long_op
? 4 : 2) : 1;
636 int step
= (context
->EFlags
& 0x400) ? -opsize
: +opsize
;
637 int seg
= outp
? context
->SegDs
: context
->SegEs
; /* FIXME: is this right? */
640 /* FIXME: Check segment is readable. */
643 /* FIXME: Check segment is writable. */
648 if (long_addr
) context
->Ecx
= 0;
649 else SET_LOWORD(context
->Ecx
,0);
655 WORD dx
= LOWORD(context
->Edx
);
658 data
= make_ptr( context
, seg
, context
->Esi
, long_addr
);
659 if (long_addr
) context
->Esi
+= step
;
660 else ADD_LOWORD(context
->Esi
,step
);
664 data
= make_ptr( context
, seg
, context
->Edi
, long_addr
);
665 if (long_addr
) context
->Edi
+= step
;
666 else ADD_LOWORD(context
->Edi
,step
);
672 *(BYTE
*)data
= INSTR_inport( dx
, 1, context
);
676 *(DWORD
*)data
= INSTR_inport( dx
, 4, context
);
678 *(WORD
*)data
= INSTR_inport( dx
, 2, context
);
681 INSTR_outport( dx
, 1, *(BYTE
*)data
, context
);
685 INSTR_outport( dx
, 4, *(DWORD
*)data
, context
);
687 INSTR_outport( dx
, 2, *(WORD
*)data
, context
);
691 context
->Eip
+= prefixlen
+ 1;
693 return ExceptionContinueExecution
;
695 case 0x8b: /* mov Ev, Gv */
697 BYTE
*addr
= INSTR_GetOperandAddr(context
, instr
+ 1, long_addr
,
699 struct idtr idtr
= get_idtr();
700 unsigned int offset
= addr
- idtr
.base
;
702 if (offset
<= idtr
.limit
+ 1 - (long_op
? 4 : 2))
704 idt
[1].LimitLow
= 0x100; /* FIXME */
705 idt
[2].LimitLow
= 0x11E; /* FIXME */
706 idt
[3].LimitLow
= 0x500; /* FIXME */
707 store_reg( context
, instr
[1], (BYTE
*)idt
+ offset
, long_op
);
708 context
->Eip
+= prefixlen
+ len
+ 1;
709 return ExceptionContinueExecution
;
712 break; /* Unable to emulate it */
714 case 0x8e: /* mov XX,segment_reg */
717 BYTE
*addr
= INSTR_GetOperandAddr(context
, instr
+ 1,
718 long_addr
, segprefix
, &len
);
720 break; /* Unable to emulate it */
722 if (!INSTR_ReplaceSelector( context
, &seg
))
723 break; /* Unable to emulate it */
725 switch((instr
[1] >> 3) & 7)
728 context
->SegEs
= seg
;
729 context
->Eip
+= prefixlen
+ len
+ 1;
730 return ExceptionContinueExecution
;
734 context
->SegSs
= seg
;
735 context
->Eip
+= prefixlen
+ len
+ 1;
736 return ExceptionContinueExecution
;
738 context
->SegDs
= seg
;
739 context
->Eip
+= prefixlen
+ len
+ 1;
740 return ExceptionContinueExecution
;
742 context
->SegFs
= seg
;
743 context
->Eip
+= prefixlen
+ len
+ 1;
744 return ExceptionContinueExecution
;
746 context
->SegGs
= seg
;
747 context
->Eip
+= prefixlen
+ len
+ 1;
748 return ExceptionContinueExecution
;
754 break; /* Unable to emulate it */
756 case 0xc4: /* les addr,reg */
757 case 0xc5: /* lds addr,reg */
758 if (INSTR_EmulateLDS( context
, instr
, long_op
,
759 long_addr
, segprefix
, &len
))
761 context
->Eip
+= prefixlen
+ len
;
762 return ExceptionContinueExecution
;
764 break; /* Unable to emulate it */
766 case 0xcd: /* int <XX> */
767 if (!winedos
.EmulateInterruptPM
) load_winedos();
768 if (winedos
.EmulateInterruptPM
)
770 context
->Eip
+= prefixlen
+ 2;
771 if (winedos
.EmulateInterruptPM( context
, instr
[1] )) return ExceptionContinueExecution
;
772 context
->Eip
-= prefixlen
+ 2; /* restore eip */
774 break; /* Unable to emulate it */
776 case 0xcf: /* iret */
777 if (wine_ldt_is_system(context
->SegCs
)) break; /* don't emulate it in 32-bit code */
780 DWORD
*stack
= get_stack( context
);
781 context
->Eip
= *stack
++;
782 context
->SegCs
= *stack
++;
783 context
->EFlags
= *stack
;
784 add_stack(context
, 3*sizeof(DWORD
)); /* Pop the return address and flags */
788 WORD
*stack
= get_stack( context
);
789 context
->Eip
= *stack
++;
790 context
->SegCs
= *stack
++;
791 SET_LOWORD(context
->EFlags
,*stack
);
792 add_stack(context
, 3*sizeof(WORD
)); /* Pop the return address and flags */
794 return ExceptionContinueExecution
;
796 case 0xe4: /* inb al,XX */
797 SET_LOBYTE(context
->Eax
,INSTR_inport( instr
[1], 1, context
));
798 context
->Eip
+= prefixlen
+ 2;
799 return ExceptionContinueExecution
;
801 case 0xe5: /* in (e)ax,XX */
803 context
->Eax
= INSTR_inport( instr
[1], 4, context
);
805 SET_LOWORD(context
->Eax
, INSTR_inport( instr
[1], 2, context
));
806 context
->Eip
+= prefixlen
+ 2;
807 return ExceptionContinueExecution
;
809 case 0xe6: /* outb XX,al */
810 INSTR_outport( instr
[1], 1, LOBYTE(context
->Eax
), context
);
811 context
->Eip
+= prefixlen
+ 2;
812 return ExceptionContinueExecution
;
814 case 0xe7: /* out XX,(e)ax */
816 INSTR_outport( instr
[1], 4, context
->Eax
, context
);
818 INSTR_outport( instr
[1], 2, LOWORD(context
->Eax
), context
);
819 context
->Eip
+= prefixlen
+ 2;
820 return ExceptionContinueExecution
;
822 case 0xec: /* inb al,dx */
823 SET_LOBYTE(context
->Eax
, INSTR_inport( LOWORD(context
->Edx
), 1, context
) );
824 context
->Eip
+= prefixlen
+ 1;
825 return ExceptionContinueExecution
;
827 case 0xed: /* in (e)ax,dx */
829 context
->Eax
= INSTR_inport( LOWORD(context
->Edx
), 4, context
);
831 SET_LOWORD(context
->Eax
, INSTR_inport( LOWORD(context
->Edx
), 2, context
));
832 context
->Eip
+= prefixlen
+ 1;
833 return ExceptionContinueExecution
;
835 case 0xee: /* outb dx,al */
836 INSTR_outport( LOWORD(context
->Edx
), 1, LOBYTE(context
->Eax
), context
);
837 context
->Eip
+= prefixlen
+ 1;
838 return ExceptionContinueExecution
;
840 case 0xef: /* out dx,(e)ax */
842 INSTR_outport( LOWORD(context
->Edx
), 4, context
->Eax
, context
);
844 INSTR_outport( LOWORD(context
->Edx
), 2, LOWORD(context
->Eax
), context
);
845 context
->Eip
+= prefixlen
+ 1;
846 return ExceptionContinueExecution
;
849 get_vm86_teb_info()->dpmi_vif
= 0;
850 context
->Eip
+= prefixlen
+ 1;
851 return ExceptionContinueExecution
;
854 get_vm86_teb_info()->dpmi_vif
= 1;
855 context
->Eip
+= prefixlen
+ 1;
856 if (get_vm86_teb_info()->vm86_pending
)
858 get_vm86_teb_info()->vm86_pending
= 0;
859 rec
->ExceptionCode
= EXCEPTION_VM86_STI
;
860 break; /* Handle the pending event. */
862 return ExceptionContinueExecution
;
864 return ExceptionContinueSearch
; /* Unable to emulate it */
868 /***********************************************************************
869 * INSTR_vectored_handler
871 * Vectored exception handler used to emulate protected instructions
874 LONG CALLBACK
INSTR_vectored_handler( EXCEPTION_POINTERS
*ptrs
)
876 EXCEPTION_RECORD
*record
= ptrs
->ExceptionRecord
;
877 CONTEXT86
*context
= ptrs
->ContextRecord
;
879 if (wine_ldt_is_system(context
->SegCs
) &&
880 (record
->ExceptionCode
== EXCEPTION_ACCESS_VIOLATION
||
881 record
->ExceptionCode
== EXCEPTION_PRIV_INSTRUCTION
))
883 if (__wine_emulate_instruction( record
, context
) == ExceptionContinueExecution
)
884 return EXCEPTION_CONTINUE_EXECUTION
;
886 return EXCEPTION_CONTINUE_SEARCH
;
890 /***********************************************************************
891 * INSTR_CallBuiltinHandler
893 static void INSTR_CallBuiltinHandler( CONTEXT86
*context
, BYTE intnum
)
895 if (!winedos
.CallBuiltinHandler
) load_winedos();
896 if (winedos
.CallBuiltinHandler
) winedos
.CallBuiltinHandler( context
, intnum
);
900 /***********************************************************************
901 * DOS3Call (KERNEL.102)
903 void WINAPI
DOS3Call( CONTEXT86
*context
)
905 INSTR_CallBuiltinHandler( context
, 0x21 );
909 /***********************************************************************
910 * NetBIOSCall (KERNEL.103)
912 void WINAPI
NetBIOSCall16( CONTEXT86
*context
)
914 INSTR_CallBuiltinHandler( context
, 0x5c );
918 /***********************************************************************
919 * GetSetKernelDOSProc (KERNEL.311)
921 FARPROC16 WINAPI
GetSetKernelDOSProc16( FARPROC16 DosProc
)
923 FIXME("(DosProc=%p): stub\n", DosProc
);
927 #endif /* __i386__ */