EMAllA.asm@ 8564

Last change on this file since 8564 was 8225, checked in by vboxsync, 17 years ago
Added some assembly support routines (inactive; todo)
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 31.7 KB

Line
1	; $Id: EMAllA.asm 8225 2008-04-21 13:35:52Z vboxsync $
2	;; @file
3	; EM Assembly Routines.
4	;
5
6	;
7	; Copyright (C) 2006-2007 Sun Microsystems, Inc.
8	;
9	; This file is part of VirtualBox Open Source Edition (OSE), as
10	; available from http://www.virtualbox.org. This file is free software;
11	; you can redistribute it and/or modify it under the terms of the GNU
12	; General Public License (GPL) as published by the Free Software
13	; Foundation, in version 2 as it comes in the "COPYING" file of the
14	; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	;
17	; Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	; Clara, CA 95054 USA or visit http://www.sun.com if you need
19	; additional information or have any questions.
20	;
21
22	;*******************************************************************************
23	;* Header Files *
24	;*******************************************************************************
25	%include "VBox/asmdefs.mac"
26	%include "VBox/err.mac"
27	%include "VBox/x86.mac"
28
29	;; @def MY_PTR_REG
30	; The register we use for value pointers (And,Or,Dec,Inc).
31	%ifdef RT_ARCH_AMD64
32	%define MY_PTR_REG rcx
33	%else
34	%define MY_PTR_REG ecx
35	%endif
36
37	;; @def MY_RET_REG
38	; The register we return the result in.
39	%ifdef RT_ARCH_AMD64
40	%define MY_RET_REG rax
41	%else
42	%define MY_RET_REG eax
43	%endif
44
45	BEGINCODE
46
47
48	;;
49	; Emulate CMP instruction, CDECL calling conv.
50	; EMDECL(uint32_t) EMEmulateCmp(uint32_t u32Param1, uint32_t u32Param2, size_t cb);
51	;
52	; @returns EFLAGS after the operation, only arithmetic flags is valid.
53	; @param [esp + 04h] rdi rcx Param 1 - First parameter (Dst).
54	; @param [esp + 08h] rsi edx Param 2 - Second parameter (Src).
55	; @param [esp + 0ch] rdx r8 Param 3 - Size of parameters, only 1/2/4 is valid.
56	;
57	align 16
58	BEGINPROC EMEmulateCmp
59	%ifdef RT_ARCH_AMD64
60	%ifdef RT_OS_WINDOWS
61	mov rax, r8 ; eax = size of parameters
62	%else ; !RT_OS_WINDOWS
63	mov rax, rdx ; rax = size of parameters
64	mov rcx, rdi ; rcx = first parameter
65	mov rdx, rsi ; rdx = second parameter
66	%endif ; !RT_OS_WINDOWS
67	%else ; !RT_ARCH_AMD64
68	mov eax, [esp + 0ch] ; eax = size of parameters
69	mov ecx, [esp + 04h] ; ecx = first parameter
70	mov edx, [esp + 08h] ; edx = second parameter
71	%endif
72
73	; switch on size
74	%ifdef RT_ARCH_AMD64
75	cmp al, 8
76	je short .do_qword ; 8 bytes variant
77	%endif
78	cmp al, 4
79	je short .do_dword ; 4 bytes variant
80	cmp al, 2
81	je short .do_word ; 2 byte variant
82	cmp al, 1
83	je short .do_byte ; 1 bytes variant
84	int3
85
86	; workers
87	%ifdef RT_ARCH_AMD64
88	.do_qword:
89	cmp rcx, rdx ; do 8 bytes CMP
90	jmp short .done
91	%endif
92
93	.do_dword:
94	cmp ecx, edx ; do 4 bytes CMP
95	jmp short .done
96
97	.do_word:
98	cmp cx, dx ; do 2 bytes CMP
99	jmp short .done
100
101	.do_byte:
102	cmp cl, dl ; do 1 byte CMP
103
104	; collect flags and return.
105	.done:
106	pushf
107	pop MY_RET_REG
108	retn
109	ENDPROC EMEmulateCmp
110
111
112	;;
113	; Emulate AND instruction, CDECL calling conv.
114	; EMDECL(uint32_t) EMEmulateAnd(uint32_t *pu32Param1, uint32_t u32Param2, size_t cb);
115	;
116	; @returns EFLAGS after the operation, only arithmetic flags is valid.
117	; @param [esp + 04h] Param 1 - First parameter - pointer to data item.
118	; @param [esp + 08h] Param 2 - Second parameter.
119	; @param [esp + 0ch] Param 3 - Size of parameters, only 1/2/4 is valid.
120	; @uses eax, ecx, edx
121	;
122	align 16
123	BEGINPROC EMEmulateAnd
124	%ifdef RT_ARCH_AMD64
125	%ifdef RT_OS_WINDOWS
126	mov rax, r8 ; eax = size of parameters
127	%else ; !RT_OS_WINDOWS
128	mov rax, rdx ; rax = size of parameters
129	mov rcx, rdi ; rcx = first parameter
130	mov rdx, rsi ; rdx = second parameter
131	%endif ; !RT_OS_WINDOWS
132	%else ; !RT_ARCH_AMD64
133	mov eax, [esp + 0ch] ; eax = size of parameters
134	mov ecx, [esp + 04h] ; ecx = first parameter
135	mov edx, [esp + 08h] ; edx = second parameter
136	%endif
137
138	; switch on size
139	%ifdef RT_ARCH_AMD64
140	cmp al, 8
141	je short .do_qword ; 8 bytes variant
142	%endif
143	cmp al, 4
144	je short .do_dword ; 4 bytes variant
145	cmp al, 2
146	je short .do_word ; 2 byte variant
147	cmp al, 1
148	je short .do_byte ; 1 bytes variant
149	int3
150
151	; workers
152	%ifdef RT_ARCH_AMD64
153	.do_qword:
154	and [MY_PTR_REG], rdx ; do 8 bytes AND
155	jmp short .done
156	%endif
157
158	.do_dword:
159	and [MY_PTR_REG], edx ; do 4 bytes AND
160	jmp short .done
161
162	.do_word:
163	and [MY_PTR_REG], dx ; do 2 bytes AND
164	jmp short .done
165
166	.do_byte:
167	and [MY_PTR_REG], dl ; do 1 byte AND
168
169	; collect flags and return.
170	.done:
171	pushf
172	pop MY_RET_REG
173	retn
174	ENDPROC EMEmulateAnd
175
176
177	;;
178	; Emulate OR instruction, CDECL calling conv.
179	; EMDECL(uint32_t) EMEmulateOr(uint32_t *pu32Param1, uint32_t u32Param2, size_t cb);
180	;
181	; @returns EFLAGS after the operation, only arithmetic flags is valid.
182	; @param [esp + 04h] Param 1 - First parameter - pointer to data item.
183	; @param [esp + 08h] Param 2 - Second parameter.
184	; @param [esp + 0ch] Param 3 - Size of parameters, only 1/2/4 is valid.
185	; @uses eax, ecx, edx
186	;
187	align 16
188	BEGINPROC EMEmulateOr
189	%ifdef RT_ARCH_AMD64
190	%ifdef RT_OS_WINDOWS
191	mov rax, r8 ; eax = size of parameters
192	%else ; !RT_OS_WINDOWS
193	mov rax, rdx ; rax = size of parameters
194	mov rcx, rdi ; rcx = first parameter
195	mov rdx, rsi ; rdx = second parameter
196	%endif ; !RT_OS_WINDOWS
197	%else ; !RT_ARCH_AMD64
198	mov eax, [esp + 0ch] ; eax = size of parameters
199	mov ecx, [esp + 04h] ; ecx = first parameter
200	mov edx, [esp + 08h] ; edx = second parameter
201	%endif
202
203	; switch on size
204	%ifdef RT_ARCH_AMD64
205	cmp al, 8
206	je short .do_qword ; 8 bytes variant
207	%endif
208	cmp al, 4
209	je short .do_dword ; 4 bytes variant
210	cmp al, 2
211	je short .do_word ; 2 byte variant
212	cmp al, 1
213	je short .do_byte ; 1 bytes variant
214	int3
215
216	; workers
217	%ifdef RT_ARCH_AMD64
218	.do_qword:
219	or [MY_PTR_REG], rdx ; do 8 bytes OR
220	jmp short .done
221	%endif
222
223	.do_dword:
224	or [MY_PTR_REG], edx ; do 4 bytes OR
225	jmp short .done
226
227	.do_word:
228	or [MY_PTR_REG], dx ; do 2 bytes OR
229	jmp short .done
230
231	.do_byte:
232	or [MY_PTR_REG], dl ; do 1 byte OR
233
234	; collect flags and return.
235	.done:
236	pushf
237	pop MY_RET_REG
238	retn
239	ENDPROC EMEmulateOr
240
241	;;
242	; Emulate LOCK OR instruction.
243	; EMDECL(int) EMEmulateLockOr(RTGCPTR GCPtrParam1, RTGCUINTREG Param2, size_t cbSize, RTGCUINTREG *pf);
244	;
245	; @returns VINF_SUCCESS on success, VERR_ACCESS_DENIED on \#PF (GC only).
246	; @param [esp + 04h] gcc:rdi msc:rcx Param 1 - First parameter - pointer to data item (the real stuff).
247	; @param [esp + 08h] gcc:rsi msc:rdx Param 2 - Second parameter- the immediate / register value.
248	; @param [esp + 0ch] gcc:rdx msc:r8 Param 3 - Size of the operation - 1, 2, 4 or 8 bytes.
249	; @param [esp + 10h] gcc:rcx msc:r9 Param 4 - Where to store the eflags on success.
250	; only arithmetic flags are valid.
251	align 16
252	BEGINPROC EMEmulateLockOr
253	%ifdef RT_ARCH_AMD64
254	%ifdef RT_OS_WINDOWS
255	mov rax, r8 ; eax = size of parameters
256	%else ; !RT_OS_WINDOWS
257	mov rax, rdx ; rax = size of parameters
258	mov rcx, rdi ; rcx = first parameter
259	mov rdx, rsi ; rdx = second parameter
260	%endif ; !RT_OS_WINDOWS
261	%else ; !RT_ARCH_AMD64
262	mov eax, [esp + 0ch] ; eax = size of parameters
263	mov ecx, [esp + 04h] ; ecx = first parameter (MY_PTR_REG)
264	mov edx, [esp + 08h] ; edx = second parameter
265	%endif
266
267	; switch on size
268	%ifdef RT_ARCH_AMD64
269	cmp al, 8
270	je short .do_qword ; 8 bytes variant
271	%endif
272	cmp al, 4
273	je short .do_dword ; 4 bytes variant
274	cmp al, 2
275	je short .do_word ; 2 byte variant
276	cmp al, 1
277	je short .do_byte ; 1 bytes variant
278	int3
279
280	; workers
281	%ifdef RT_ARCH_AMD64
282	.do_qword:
283	lock or [MY_PTR_REG], rdx ; do 8 bytes OR
284	jmp short .done
285	%endif
286
287	.do_dword:
288	lock or [MY_PTR_REG], edx ; do 4 bytes OR
289	jmp short .done
290
291	.do_word:
292	lock or [MY_PTR_REG], dx ; do 2 bytes OR
293	jmp short .done
294
295	.do_byte:
296	lock or [MY_PTR_REG], dl ; do 1 byte OR
297
298	; collect flags and return.
299	.done:
300	pushf
301	%ifdef RT_ARCH_AMD64
302	pop rax
303	%ifdef RT_OS_WINDOWS
304	mov [r9], eax
305	%else ; !RT_OS_WINDOWS
306	mov [rcx], eax
307	%endif ; !RT_OS_WINDOWS
308	%else ; !RT_ARCH_AMD64
309	mov eax, [esp + 10h + 4]
310	pop dword [eax]
311	%endif
312	mov eax, VINF_SUCCESS
313	retn
314
315	%ifdef IN_GC
316	; #PF resume point.
317	GLOBALNAME EMEmulateLockOr_Error
318	mov eax, VERR_ACCESS_DENIED
319	ret
320	%endif
321
322	ENDPROC EMEmulateLockOr
323
324	;;
325	; Emulate XOR instruction, CDECL calling conv.
326	; EMDECL(uint32_t) EMEmulateXor(uint32_t *pu32Param1, uint32_t u32Param2, size_t cb);
327	;
328	; @returns EFLAGS after the operation, only arithmetic flags is valid.
329	; @param [esp + 04h] Param 1 - First parameter - pointer to data item.
330	; @param [esp + 08h] Param 2 - Second parameter.
331	; @param [esp + 0ch] Param 3 - Size of parameters, only 1/2/4 is valid.
332	; @uses eax, ecx, edx
333	;
334	align 16
335	BEGINPROC EMEmulateXor
336	%ifdef RT_ARCH_AMD64
337	%ifdef RT_OS_WINDOWS
338	mov rax, r8 ; eax = size of parameters
339	%else ; !RT_OS_WINDOWS
340	mov rax, rdx ; rax = size of parameters
341	mov rcx, rdi ; rcx = first parameter
342	mov rdx, rsi ; rdx = second parameter
343	%endif ; !RT_OS_WINDOWS
344	%else ; !RT_ARCH_AMD64
345	mov eax, [esp + 0ch] ; eax = size of parameters
346	mov ecx, [esp + 04h] ; ecx = first parameter
347	mov edx, [esp + 08h] ; edx = second parameter
348	%endif
349
350	; switch on size
351	%ifdef RT_ARCH_AMD64
352	cmp al, 8
353	je short .do_qword ; 8 bytes variant
354	%endif
355	cmp al, 4
356	je short .do_dword ; 4 bytes variant
357	cmp al, 2
358	je short .do_word ; 2 byte variant
359	cmp al, 1
360	je short .do_byte ; 1 bytes variant
361	int3
362
363	; workers
364	%ifdef RT_ARCH_AMD64
365	.do_qword:
366	xor [MY_PTR_REG], rdx ; do 8 bytes XOR
367	jmp short .done
368	%endif
369
370	.do_dword:
371	xor [MY_PTR_REG], edx ; do 4 bytes XOR
372	jmp short .done
373
374	.do_word:
375	xor [MY_PTR_REG], dx ; do 2 bytes XOR
376	jmp short .done
377
378	.do_byte:
379	xor [MY_PTR_REG], dl ; do 1 byte XOR
380
381	; collect flags and return.
382	.done:
383	pushf
384	pop MY_RET_REG
385	retn
386	ENDPROC EMEmulateXor
387
388	;;
389	; Emulate INC instruction, CDECL calling conv.
390	; EMDECL(uint32_t) EMEmulateInc(uint32_t *pu32Param1, size_t cb);
391	;
392	; @returns EFLAGS after the operation, only arithmetic flags are valid.
393	; @param [esp + 04h] rdi rcx Param 1 - First parameter - pointer to data item.
394	; @param [esp + 08h] rsi rdx Param 2 - Size of parameters, only 1/2/4 is valid.
395	; @uses eax, ecx, edx
396	;
397	align 16
398	BEGINPROC EMEmulateInc
399	%ifdef RT_ARCH_AMD64
400	%ifdef RT_OS_WINDOWS
401	mov rax, rdx ; eax = size of parameters
402	%else ; !RT_OS_WINDOWS
403	mov rax, rsi ; eax = size of parameters
404	mov rcx, rdi ; rcx = first parameter
405	%endif ; !RT_OS_WINDOWS
406	%else ; !RT_ARCH_AMD64
407	mov eax, [esp + 08h] ; eax = size of parameters
408	mov ecx, [esp + 04h] ; ecx = first parameter
409	%endif
410
411	; switch on size
412	%ifdef RT_ARCH_AMD64
413	cmp al, 8
414	je short .do_qword ; 8 bytes variant
415	%endif
416	cmp al, 4
417	je short .do_dword ; 4 bytes variant
418	cmp al, 2
419	je short .do_word ; 2 byte variant
420	cmp al, 1
421	je short .do_byte ; 1 bytes variant
422	int3
423
424	; workers
425	%ifdef RT_ARCH_AMD64
426	.do_qword:
427	inc qword [MY_PTR_REG] ; do 8 bytes INC
428	jmp short .done
429	%endif
430
431	.do_dword:
432	inc dword [MY_PTR_REG] ; do 4 bytes INC
433	jmp short .done
434
435	.do_word:
436	inc word [MY_PTR_REG] ; do 2 bytes INC
437	jmp short .done
438
439	.do_byte:
440	inc byte [MY_PTR_REG] ; do 1 byte INC
441	jmp short .done
442
443	; collect flags and return.
444	.done:
445	pushf
446	pop MY_RET_REG
447	retn
448	ENDPROC EMEmulateInc
449
450
451	;;
452	; Emulate DEC instruction, CDECL calling conv.
453	; EMDECL(uint32_t) EMEmulateDec(uint32_t *pu32Param1, size_t cb);
454	;
455	; @returns EFLAGS after the operation, only arithmetic flags are valid.
456	; @param [esp + 04h] Param 1 - First parameter - pointer to data item.
457	; @param [esp + 08h] Param 2 - Size of parameters, only 1/2/4 is valid.
458	; @uses eax, ecx, edx
459	;
460	align 16
461	BEGINPROC EMEmulateDec
462	%ifdef RT_ARCH_AMD64
463	%ifdef RT_OS_WINDOWS
464	mov rax, rdx ; eax = size of parameters
465	%else ; !RT_OS_WINDOWS
466	mov rax, rsi ; eax = size of parameters
467	mov rcx, rdi ; rcx = first parameter
468	%endif ; !RT_OS_WINDOWS
469	%else ; !RT_ARCH_AMD64
470	mov eax, [esp + 08h] ; eax = size of parameters
471	mov ecx, [esp + 04h] ; ecx = first parameter
472	%endif
473
474	; switch on size
475	%ifdef RT_ARCH_AMD64
476	cmp al, 8
477	je short .do_qword ; 8 bytes variant
478	%endif
479	cmp al, 4
480	je short .do_dword ; 4 bytes variant
481	cmp al, 2
482	je short .do_word ; 2 byte variant
483	cmp al, 1
484	je short .do_byte ; 1 bytes variant
485	int3
486
487	; workers
488	%ifdef RT_ARCH_AMD64
489	.do_qword:
490	dec qword [MY_PTR_REG] ; do 8 bytes DEC
491	jmp short .done
492	%endif
493
494	.do_dword:
495	dec dword [MY_PTR_REG] ; do 4 bytes DEC
496	jmp short .done
497
498	.do_word:
499	dec word [MY_PTR_REG] ; do 2 bytes DEC
500	jmp short .done
501
502	.do_byte:
503	dec byte [MY_PTR_REG] ; do 1 byte DEC
504	jmp short .done
505
506	; collect flags and return.
507	.done:
508	pushf
509	pop MY_RET_REG
510	retn
511	ENDPROC EMEmulateDec
512
513	;;
514	; Emulate ADD instruction, CDECL calling conv.
515	; EMDECL(uint32_t) EMEmulateAdd(uint32_t *pu32Param1, uint32_t u32Param2, size_t cb);
516	;
517	; @returns EFLAGS after the operation, only arithmetic flags is valid.
518	; @param [esp + 04h] Param 1 - First parameter - pointer to data item.
519	; @param [esp + 08h] Param 2 - Second parameter.
520	; @param [esp + 0ch] Param 3 - Size of parameters, only 1/2/4 is valid.
521	; @uses eax, ecx, edx
522	;
523	align 16
524	BEGINPROC EMEmulateAdd
525	%ifdef RT_ARCH_AMD64
526	%ifdef RT_OS_WINDOWS
527	mov rax, r8 ; eax = size of parameters
528	%else ; !RT_OS_WINDOWS
529	mov rax, rdx ; rax = size of parameters
530	mov rcx, rdi ; rcx = first parameter
531	mov rdx, rsi ; rdx = second parameter
532	%endif ; !RT_OS_WINDOWS
533	%else ; !RT_ARCH_AMD64
534	mov eax, [esp + 0ch] ; eax = size of parameters
535	mov ecx, [esp + 04h] ; ecx = first parameter
536	mov edx, [esp + 08h] ; edx = second parameter
537	%endif
538
539	; switch on size
540	%ifdef RT_ARCH_AMD64
541	cmp al, 8
542	je short .do_qword ; 8 bytes variant
543	%endif
544	cmp al, 4
545	je short .do_dword ; 4 bytes variant
546	cmp al, 2
547	je short .do_word ; 2 byte variant
548	cmp al, 1
549	je short .do_byte ; 1 bytes variant
550	int3
551
552	; workers
553	%ifdef RT_ARCH_AMD64
554	.do_qword:
555	add [MY_PTR_REG], rdx ; do 8 bytes ADD
556	jmp short .done
557	%endif
558
559	.do_dword:
560	add [MY_PTR_REG], edx ; do 4 bytes ADD
561	jmp short .done
562
563	.do_word:
564	add [MY_PTR_REG], dx ; do 2 bytes ADD
565	jmp short .done
566
567	.do_byte:
568	add [MY_PTR_REG], dl ; do 1 byte ADD
569
570	; collect flags and return.
571	.done:
572	pushf
573	pop MY_RET_REG
574	retn
575	ENDPROC EMEmulateAdd
576
577	;;
578	; Emulate ADC instruction, CDECL calling conv.
579	; EMDECL(uint32_t) EMEmulateAdcWithCarrySet(uint32_t *pu32Param1, uint32_t u32Param2, size_t cb);
580	;
581	; @returns EFLAGS after the operation, only arithmetic flags is valid.
582	; @param [esp + 04h] Param 1 - First parameter - pointer to data item.
583	; @param [esp + 08h] Param 2 - Second parameter.
584	; @param [esp + 0ch] Param 3 - Size of parameters, only 1/2/4 is valid.
585	; @uses eax, ecx, edx
586	;
587	align 16
588	BEGINPROC EMEmulateAdcWithCarrySet
589	%ifdef RT_ARCH_AMD64
590	%ifdef RT_OS_WINDOWS
591	mov rax, r8 ; eax = size of parameters
592	%else ; !RT_OS_WINDOWS
593	mov rax, rdx ; rax = size of parameters
594	mov rcx, rdi ; rcx = first parameter
595	mov rdx, rsi ; rdx = second parameter
596	%endif ; !RT_OS_WINDOWS
597	%else ; !RT_ARCH_AMD64
598	mov eax, [esp + 0ch] ; eax = size of parameters
599	mov ecx, [esp + 04h] ; ecx = first parameter
600	mov edx, [esp + 08h] ; edx = second parameter
601	%endif
602
603	; switch on size
604	%ifdef RT_ARCH_AMD64
605	cmp al, 8
606	je short .do_qword ; 8 bytes variant
607	%endif
608	cmp al, 4
609	je short .do_dword ; 4 bytes variant
610	cmp al, 2
611	je short .do_word ; 2 byte variant
612	cmp al, 1
613	je short .do_byte ; 1 bytes variant
614	int3
615
616	; workers
617	%ifdef RT_ARCH_AMD64
618	.do_qword:
619	stc ; set carry flag
620	adc [MY_PTR_REG], rdx ; do 8 bytes ADC
621	jmp short .done
622	%endif
623
624	.do_dword:
625	stc ; set carry flag
626	adc [MY_PTR_REG], edx ; do 4 bytes ADC
627	jmp short .done
628
629	.do_word:
630	stc ; set carry flag
631	adc [MY_PTR_REG], dx ; do 2 bytes ADC
632	jmp short .done
633
634	.do_byte:
635	stc ; set carry flag
636	adc [MY_PTR_REG], dl ; do 1 byte ADC
637
638	; collect flags and return.
639	.done:
640	pushf
641	pop MY_RET_REG
642	retn
643	ENDPROC EMEmulateAdcWithCarrySet
644
645	;;
646	; Emulate SUB instruction, CDECL calling conv.
647	; EMDECL(uint32_t) EMEmulateSub(uint32_t *pu32Param1, uint32_t u32Param2, size_t cb);
648	;
649	; @returns EFLAGS after the operation, only arithmetic flags is valid.
650	; @param [esp + 04h] Param 1 - First parameter - pointer to data item.
651	; @param [esp + 08h] Param 2 - Second parameter.
652	; @param [esp + 0ch] Param 3 - Size of parameters, only 1/2/4 is valid.
653	; @uses eax, ecx, edx
654	;
655	align 16
656	BEGINPROC EMEmulateSub
657	%ifdef RT_ARCH_AMD64
658	%ifdef RT_OS_WINDOWS
659	mov rax, r8 ; eax = size of parameters
660	%else ; !RT_OS_WINDOWS
661	mov rax, rdx ; rax = size of parameters
662	mov rcx, rdi ; rcx = first parameter
663	mov rdx, rsi ; rdx = second parameter
664	%endif ; !RT_OS_WINDOWS
665	%else ; !RT_ARCH_AMD64
666	mov eax, [esp + 0ch] ; eax = size of parameters
667	mov ecx, [esp + 04h] ; ecx = first parameter
668	mov edx, [esp + 08h] ; edx = second parameter
669	%endif
670
671	; switch on size
672	%ifdef RT_ARCH_AMD64
673	cmp al, 8
674	je short .do_qword ; 8 bytes variant
675	%endif
676	cmp al, 4
677	je short .do_dword ; 4 bytes variant
678	cmp al, 2
679	je short .do_word ; 2 byte variant
680	cmp al, 1
681	je short .do_byte ; 1 bytes variant
682	int3
683
684	; workers
685	%ifdef RT_ARCH_AMD64
686	.do_qword:
687	sub [MY_PTR_REG], rdx ; do 8 bytes SUB
688	jmp short .done
689	%endif
690
691	.do_dword:
692	sub [MY_PTR_REG], edx ; do 4 bytes SUB
693	jmp short .done
694
695	.do_word:
696	sub [MY_PTR_REG], dx ; do 2 bytes SUB
697	jmp short .done
698
699	.do_byte:
700	sub [MY_PTR_REG], dl ; do 1 byte SUB
701
702	; collect flags and return.
703	.done:
704	pushf
705	pop MY_RET_REG
706	retn
707	ENDPROC EMEmulateSub
708
709
710	;;
711	; Emulate BTR instruction, CDECL calling conv.
712	; EMDECL(uint32_t) EMEmulateBtr(uint32_t *pu32Param1, uint32_t u32Param2);
713	;
714	; @returns EFLAGS after the operation, only arithmetic flags is valid.
715	; @param [esp + 04h] Param 1 - First parameter - pointer to data item.
716	; @param [esp + 08h] Param 2 - Second parameter.
717	; @uses eax, ecx, edx
718	;
719	align 16
720	BEGINPROC EMEmulateBtr
721	%ifdef RT_ARCH_AMD64
722	%ifndef RT_OS_WINDOWS
723	mov rcx, rdi ; rcx = first parameter
724	mov rdx, rsi ; rdx = second parameter
725	%endif ; !RT_OS_WINDOWS
726	%else ; !RT_ARCH_AMD64
727	mov ecx, [esp + 04h] ; ecx = first parameter
728	mov edx, [esp + 08h] ; edx = second parameter
729	%endif
730
731	and edx, 7
732	btr [MY_PTR_REG], edx
733
734	; collect flags and return.
735	pushf
736	pop MY_RET_REG
737	retn
738	ENDPROC EMEmulateBtr
739
740	;;
741	; Emulate LOCK BTR instruction.
742	; EMDECL(int) EMEmulateLockBtr(RTGCPTR GCPtrParam1, RTGCUINTREG Param2, uint32_t *pf);
743	;
744	; @returns VINF_SUCCESS on success, VERR_ACCESS_DENIED on \#PF (GC only).
745	; @param [esp + 04h] gcc:rdi msc:rcx Param 1 - First parameter - pointer to data item (the real stuff).
746	; @param [esp + 08h] gcc:rsi msc:rdx Param 2 - Second parameter- the immediate / register value. (really an 8 byte value)
747	; @param [esp + 0ch] gcc:rdx msc:r8 Param 3 - Where to store the eflags on success.
748	;
749	align 16
750	BEGINPROC EMEmulateLockBtr
751	%ifdef RT_ARCH_AMD64
752	%ifdef RT_OS_WINDOWS
753	mov rax, r8 ; rax = third parameter
754	%else ; !RT_OS_WINDOWS
755	mov rcx, rdi ; rcx = first parameter
756	mov rax, rdx ; rax = third parameter
757	mov rdx, rsi ; rdx = second parameter
758	%endif ; !RT_OS_WINDOWS
759	%else ; !RT_ARCH_AMD64
760	mov ecx, [esp + 04h] ; ecx = first parameter
761	mov edx, [esp + 08h] ; edx = second parameter
762	mov eax, [esp + 0ch] ; eax = third parameter
763	%endif
764
765	lock btr [MY_PTR_REG], edx
766
767	; collect flags and return.
768	pushf
769	pop xDX
770	mov [xAX], edx
771	mov eax, VINF_SUCCESS
772	retn
773
774	%ifdef IN_GC
775	; #PF resume point.
776	GLOBALNAME EMEmulateLockBtr_Error
777	mov eax, VERR_ACCESS_DENIED
778	ret
779	%endif
780
781	ENDPROC EMEmulateLockBtr
782
783	;;
784	; Emulate BTC instruction, CDECL calling conv.
785	; EMDECL(uint32_t) EMEmulateBtc(uint32_t *pu32Param1, uint32_t u32Param2);
786	;
787	; @returns EFLAGS after the operation, only arithmetic flags is valid.
788	; @param [esp + 04h] Param 1 - First parameter - pointer to data item.
789	; @param [esp + 08h] Param 2 - Second parameter.
790	; @uses eax, ecx, edx
791	;
792	align 16
793	BEGINPROC EMEmulateBtc
794	%ifdef RT_ARCH_AMD64
795	%ifndef RT_OS_WINDOWS
796	mov rcx, rdi ; rcx = first parameter
797	mov rdx, rsi ; rdx = second parameter
798	%endif ; !RT_OS_WINDOWS
799	%else ; !RT_ARCH_AMD64
800	mov ecx, [esp + 04h] ; ecx = first parameter
801	mov edx, [esp + 08h] ; edx = second parameter
802	%endif
803
804	and edx, 7
805	btc [MY_PTR_REG], edx
806
807	; collect flags and return.
808	pushf
809	pop MY_RET_REG
810	retn
811	ENDPROC EMEmulateBtc
812
813	;;
814	; Emulate BTS instruction, CDECL calling conv.
815	; EMDECL(uint32_t) EMEmulateBts(uint32_t *pu32Param1, uint32_t u32Param2);
816	;
817	; @returns EFLAGS after the operation, only arithmetic flags are valid.
818	; @param [esp + 04h] Param 1 - First parameter - pointer to data item.
819	; @param [esp + 08h] Param 2 - Second parameter.
820	; @uses eax, ecx, edx
821	;
822	align 16
823	BEGINPROC EMEmulateBts
824	%ifdef RT_ARCH_AMD64
825	%ifndef RT_OS_WINDOWS
826	mov rcx, rdi ; rcx = first parameter
827	mov rdx, rsi ; rdx = second parameter
828	%endif ; !RT_OS_WINDOWS
829	%else ; !RT_ARCH_AMD64
830	mov ecx, [esp + 04h] ; ecx = first parameter
831	mov edx, [esp + 08h] ; edx = second parameter
832	%endif
833
834	and edx, 7
835	bts [MY_PTR_REG], edx
836
837	; collect flags and return.
838	pushf
839	pop MY_RET_REG
840	retn
841	ENDPROC EMEmulateBts
842
843
844	%if 0
845	;;
846	; Emulate LOCK CMPXCHG instruction, CDECL calling conv.
847	; EMDECL(uint32_t) EMEmulateLockCmpXchg32(RTHCPTR pu32Param1, uint32_t *pu32Param2, uint32_t u32Param3, size_t cbSize);
848	;
849	; @returns EFLAGS after the operation, only arithmetic flags is valid.
850	; @param [esp + 04h] gcc:rdi msc:rcx Param 1 - First parameter - pointer to first parameter
851	; @param [esp + 08h] gcc:rsi msc:rdx Param 2 - pointer to second parameter (eax)
852	; @param [esp + 0ch] gcc:rdx msc:r8 Param 3 - third parameter
853	; @param [esp + 10h] gcc:rcx msc:r9 Param 4 - Size of parameters, only 1/2/4 is valid
854	; @uses eax, ecx, edx
855	;
856	align 16
857	BEGINPROC EMEmulateLockCmpXchg32
858	push ebx
859	mov ecx, [esp + 04h + 4] ; ecx = first parameter
860	mov ebx, [esp + 08h + 4] ; ebx = 2nd parameter (eax)
861	mov edx, [esp + 0ch + 4] ; edx = third parameter
862	mov eax, [esp + 10h + 4] ; eax = size of parameters
863
864	cmp al, 4
865	je short .do_dword ; 4 bytes variant
866	cmp al, 2
867	je short .do_word ; 2 byte variant
868	cmp al, 1
869	je short .do_byte ; 1 bytes variant
870	int3
871
872	.do_dword:
873	; load 2nd parameter's value
874	mov eax, dword [ebx]
875
876	lock cmpxchg dword [ecx], edx ; do 4 bytes CMPXCHG
877	mov dword [ebx], eax
878	jmp short .done
879
880	.do_word:
881	; load 2nd parameter's value
882	mov eax, dword [ebx]
883
884	lock cmpxchg word [ecx], dx ; do 2 bytes CMPXCHG
885	mov word [ebx], ax
886	jmp short .done
887
888	.do_byte:
889	; load 2nd parameter's value
890	mov eax, dword [ebx]
891
892	lock cmpxchg byte [ecx], dl ; do 1 bytes CMPXCHG
893	mov byte [ebx], al
894
895	.done:
896	; collect flags and return.
897	pushf
898	pop eax
899
900	mov edx, [esp + 14h + 4] ; eflags pointer
901	mov dword [edx], eax
902
903	pop ebx
904	mov eax, VINF_SUCCESS
905	retn
906
907	; Read error - we will be here after our page fault handler.
908	GLOBALNAME EMEmulateLockCmpXchg32_Error
909	pop ebx
910	mov eax, VERR_ACCESS_DENIED
911	ret
912
913	ENDPROC EMEmulateLockCmpXchg32
914
915	;;
916	; Emulate CMPXCHG instruction, CDECL calling conv.
917	; EMDECL(uint32_t) EMEmulateCmpXchg32(RTHCPTR pu32Param1, uint32_t *pu32Param2, uint32_t u32Param3, size_t cbSize);
918	;
919	; @returns EFLAGS after the operation, only arithmetic flags is valid.
920	; @param [esp + 04h] gcc:rdi msc:rcx Param 1 - First parameter - pointer to first parameter
921	; @param [esp + 08h] gcc:rsi msc:rdx Param 2 - pointer to second parameter (eax)
922	; @param [esp + 0ch] gcc:rdx msc:r8 Param 3 - third parameter
923	; @param [esp + 10h] gcc:rcx msc:r9 Param 4 - Size of parameters, only 1/2/4 is valid.
924	; @uses eax, ecx, edx
925	;
926	align 16
927	BEGINPROC EMEmulateCmpXchg32
928	push ebx
929	mov ecx, [esp + 04h + 4] ; ecx = first parameter
930	mov ebx, [esp + 08h + 4] ; ebx = 2nd parameter (eax)
931	mov edx, [esp + 0ch + 4] ; edx = third parameter
932	mov eax, [esp + 10h + 4] ; eax = size of parameters
933
934	cmp al, 4
935	je short .do_dword ; 4 bytes variant
936	cmp al, 2
937	je short .do_word ; 2 byte variant
938	cmp al, 1
939	je short .do_byte ; 1 bytes variant
940	int3
941
942	.do_dword:
943	; load 2nd parameter's value
944	mov eax, dword [ebx]
945
946	cmpxchg dword [ecx], edx ; do 4 bytes CMPXCHG
947	mov dword [ebx], eax
948	jmp short .done
949
950	.do_word:
951	; load 2nd parameter's value
952	mov eax, dword [ebx]
953
954	cmpxchg word [ecx], dx ; do 2 bytes CMPXCHG
955	mov word [ebx], ax
956	jmp short .done
957
958	.do_byte:
959	; load 2nd parameter's value
960	mov eax, dword [ebx]
961
962	cmpxchg byte [ecx], dl ; do 1 bytes CMPXCHG
963	mov byte [ebx], al
964
965	.done:
966	; collect flags and return.
967	pushf
968	pop eax
969
970	mov edx, [esp + 14h + 4] ; eflags pointer
971	mov dword [edx], eax
972
973	pop ebx
974	mov eax, VINF_SUCCESS
975	retn
976
977	; Read error - we will be here after our page fault handler.
978	GLOBALNAME EMEmulateCmpXchg32_Error
979	pop ebx
980	mov eax, VERR_ACCESS_DENIED
981	ret
982	ENDPROC EMEmulateCmpXchg32
983
984	;;
985	; Emulate LOCK CMPXCHG8B instruction, CDECL calling conv.
986	; EMDECL(uint32_t) EMEmulateLockCmpXchg8b(RTHCPTR pu32Param1, uint32_t pEAX, uint32_t pEDX, uint32_t uEBX, uint32_t uECX);
987	;
988	; @returns EFLAGS after the operation, only arithmetic flags is valid.
989	; @param [esp + 04h] Param 1 - First parameter - pointer to first parameter
990	; @param [esp + 08h] Param 2 - Address of the eax register
991	; @param [esp + 0ch] Param 3 - Address of the edx register
992	; @param [esp + 10h] Param 4 - EBX
993	; @param [esp + 14h] Param 5 - ECX
994	; @uses eax, ecx, edx
995	;
996	align 16
997	BEGINPROC EMEmulateLockCmpXchg8b32
998	push ebp
999	push ebx
1000	mov ebp, [esp + 04h + 8] ; ebp = first parameter
1001	mov eax, [esp + 08h + 8] ; &EAX
1002	mov eax, dword [eax]
1003	mov edx, [esp + 0ch + 8] ; &EDX
1004	mov edx, dword [edx]
1005	mov ebx, [esp + 10h + 8] ; EBX
1006	mov ecx, [esp + 14h + 8] ; ECX
1007
1008	lock cmpxchg8b qword [ebp] ; do CMPXCHG8B
1009	mov dword [esp + 08h + 8], eax
1010	mov dword [esp + 0ch + 8], edx
1011
1012	; collect flags and return.
1013	pushf
1014	pop eax
1015
1016	mov edx, [esp + 18h + 8] ; eflags pointer
1017	mov dword [edx], eax
1018
1019	pop ebx
1020	pop ebp
1021	mov eax, VINF_SUCCESS
1022	retn
1023
1024	; Read error - we will be here after our page fault handler.
1025	GLOBALNAME EMEmulateLockCmpXchg8b32_Error
1026	pop ebx
1027	pop ebp
1028	mov eax, VERR_ACCESS_DENIED
1029	ret
1030
1031	ENDPROC EMEmulateLockCmpXchg8b32
1032
1033	;;
1034	; Emulate CMPXCHG8B instruction, CDECL calling conv.
1035	; EMDECL(uint32_t) EMEmulateCmpXchg8b32(RTHCPTR pu32Param1, uint32_t pEAX, uint32_t pEDX, uint32_t uEBX, uint32_t uECX);
1036	;
1037	; @returns EFLAGS after the operation, only arithmetic flags is valid.
1038	; @param [esp + 04h] Param 1 - First parameter - pointer to first parameter
1039	; @param [esp + 08h] Param 2 - Address of the eax register
1040	; @param [esp + 0ch] Param 3 - Address of the edx register
1041	; @param [esp + 10h] Param 4 - EBX
1042	; @param [esp + 14h] Param 5 - ECX
1043	; @uses eax, ecx, edx
1044	;
1045	align 16
1046	BEGINPROC EMEmulateCmpXchg8b32
1047	push ebp
1048	push ebx
1049	mov ebp, [esp + 04h + 8] ; ebp = first parameter
1050	mov eax, [esp + 08h + 8] ; &EAX
1051	mov eax, dword [eax]
1052	mov edx, [esp + 0ch + 8] ; &EDX
1053	mov edx, dword [edx]
1054	mov ebx, [esp + 10h + 8] ; EBX
1055	mov ecx, [esp + 14h + 8] ; ECX
1056
1057	cmpxchg8b qword [ebp] ; do CMPXCHG8B
1058	mov dword [esp + 08h + 8], eax
1059	mov dword [esp + 0ch + 8], edx
1060
1061	; collect flags and return.
1062	pushf
1063	pop eax
1064
1065	mov edx, [esp + 18h + 8] ; eflags pointer
1066	mov dword [edx], eax
1067
1068	pop ebx
1069	pop ebp
1070	mov eax, VINF_SUCCESS
1071	retn
1072
1073	; Read error - we will be here after our page fault handler.
1074	GLOBALNAME EMEmulateCmpXchg8b32_Error
1075	pop ebx
1076	pop ebp
1077	mov eax, VERR_ACCESS_DENIED
1078	ret
1079	ENDPROC EMEmulateCmpXchg8b32
1080
1081	%endif

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source: vbox/trunk/src/VBox/VMM/VMMAll/EMAllA.asm@ 8564

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