CPUMR0A.asm@ 26234

Last change on this file since 26234 was 21039, checked in by vboxsync, 15 years ago
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1	; $Id: CPUMR0A.asm 21039 2009-06-29 15:57:39Z vboxsync $
2	;; @file
3	; CPUM - Guest Context 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/vm.mac"
27	%include "VBox/err.mac"
28	%include "VBox/stam.mac"
29	%include "CPUMInternal.mac"
30	%include "VBox/x86.mac"
31	%include "VBox/cpum.mac"
32
33	%ifdef IN_RING3
34	%error "The jump table doesn't link on leopard."
35	%endif
36
37	;*******************************************************************************
38	;* Defined Constants And Macros *
39	;*******************************************************************************
40	;; The offset of the XMM registers in X86FXSTATE.
41	; Use define because I'm too lazy to convert the struct.
42	%define XMM_OFF_IN_X86FXSTATE 160
43
44
45	;*******************************************************************************
46	;* External Symbols *
47	;*******************************************************************************
48	%ifdef VBOX_WITH_HYBRID_32BIT_KERNEL
49	extern NAME(SUPR0AbsIs64bit)
50	extern NAME(SUPR0Abs64bitKernelCS)
51	extern NAME(SUPR0Abs64bitKernelSS)
52	extern NAME(SUPR0Abs64bitKernelDS)
53	extern NAME(SUPR0AbsKernelCS)
54	%endif
55
56
57	;*******************************************************************************
58	;* Global Variables *
59	;*******************************************************************************
60	%ifdef VBOX_WITH_HYBRID_32BIT_KERNEL
61	BEGINDATA
62	;;
63	; Store the SUPR0AbsIs64bit absolute value here so we can cmp/test without
64	; needing to clobber a register. (This trick doesn't quite work for PE btw.
65	; but that's not relevant atm.)
66	GLOBALNAME g_fCPUMIs64bitHost
67	dd NAME(SUPR0AbsIs64bit)
68	%endif
69
70
71	BEGINCODE
72
73
74	;;
75	; Saves the host FPU/XMM state and restores the guest state.
76	;
77	; @returns 0
78	; @param pCPUMCPU x86:[esp+4] GCC:rdi MSC:rcx CPUMCPU pointer
79	;
80	align 16
81	BEGINPROC cpumR0SaveHostRestoreGuestFPUState
82	%ifdef RT_ARCH_AMD64
83	%ifdef RT_OS_WINDOWS
84	mov xDX, rcx
85	%else
86	mov xDX, rdi
87	%endif
88	%else
89	mov xDX, dword [esp + 4]
90	%endif
91	pushf ; The darwin kernel can get upset or upset things if an
92	cli ; interrupt occurs while we're doing fxsave/fxrstor/cr0.
93
94	; Switch the state.
95	or dword [xDX + CPUMCPU.fUseFlags], (CPUM_USED_FPU \| CPUM_USED_FPU_SINCE_REM)
96
97	mov xAX, cr0 ; Make sure its safe to access the FPU state.
98	mov xCX, xAX ; save old CR0
99	and xAX, ~(X86_CR0_TS \| X86_CR0_EM)
100	mov cr0, xAX ;; @todo optimize this.
101
102	%ifdef VBOX_WITH_HYBRID_32BIT_KERNEL
103	cmp byte [NAME(g_fCPUMIs64bitHost)], 0
104	jz .legacy_mode
105	db 0xea ; jmp far .sixtyfourbit_mode
106	dd .sixtyfourbit_mode, NAME(SUPR0Abs64bitKernelCS)
107	.legacy_mode:
108	%endif ; VBOX_WITH_HYBRID_32BIT_KERNEL
109
110	fxsave [xDX + CPUMCPU.Host.fpu] ; ASSUMES that all VT-x/AMD-V boxes sports fxsave/fxrstor (safe assumption)
111	fxrstor [xDX + CPUMCPU.Guest.fpu]
112
113	%ifdef VBOX_WITH_KERNEL_USING_XMM
114	; Restore the non-volatile xmm registers. ASSUMING 64-bit windows
115	lea r11, [xDX + CPUMCPU.Host.fpu + XMM_OFF_IN_X86FXSTATE]
116	movdqa xmm6, [r11 + 060h]
117	movdqa xmm7, [r11 + 070h]
118	movdqa xmm8, [r11 + 080h]
119	movdqa xmm9, [r11 + 090h]
120	movdqa xmm10, [r11 + 0a0h]
121	movdqa xmm11, [r11 + 0b0h]
122	movdqa xmm12, [r11 + 0c0h]
123	movdqa xmm13, [r11 + 0d0h]
124	movdqa xmm14, [r11 + 0e0h]
125	movdqa xmm15, [r11 + 0f0h]
126	%endif
127
128	.done:
129	mov cr0, xCX ; and restore old CR0 again ;; @todo optimize this.
130	popf
131	xor eax, eax
132	ret
133
134	%ifdef VBOX_WITH_HYBRID_32BIT_KERNEL_IN_R0
135	ALIGNCODE(16)
136	BITS 64
137	.sixtyfourbit_mode:
138	and edx, 0ffffffffh
139	fxsave [rdx + CPUMCPU.Host.fpu]
140	fxrstor [rdx + CPUMCPU.Guest.fpu]
141	jmp far [.fpret wrt rip]
142	.fpret: ; 16:32 Pointer to .the_end.
143	dd .done, NAME(SUPR0AbsKernelCS)
144	BITS 32
145	%endif
146	ENDPROC cpumR0SaveHostRestoreGuestFPUState
147
148
149	%ifndef RT_ARCH_AMD64
150	%ifdef VBOX_WITH_64_BITS_GUESTS
151	%ifndef VBOX_WITH_HYBRID_32BIT_KERNEL
152	;;
153	; Saves the host FPU/XMM state
154	;
155	; @returns 0
156	; @param pCPUMCPU x86:[esp+4] GCC:rdi MSC:rcx CPUMCPU pointer
157	;
158	align 16
159	BEGINPROC cpumR0SaveHostFPUState
160	mov xDX, dword [esp + 4]
161	pushf ; The darwin kernel can get upset or upset things if an
162	cli ; interrupt occurs while we're doing fxsave/fxrstor/cr0.
163
164	; Switch the state.
165	or dword [xDX + CPUMCPU.fUseFlags], (CPUM_USED_FPU \| CPUM_USED_FPU_SINCE_REM)
166
167	mov xAX, cr0 ; Make sure its safe to access the FPU state.
168	mov xCX, xAX ; save old CR0
169	and xAX, ~(X86_CR0_TS \| X86_CR0_EM)
170	mov cr0, xAX ;; @todo optimize this.
171
172	fxsave [xDX + CPUMCPU.Host.fpu] ; ASSUMES that all VT-x/AMD-V boxes support fxsave/fxrstor (safe assumption)
173
174	mov cr0, xCX ; and restore old CR0 again ;; @todo optimize this.
175	popf
176	xor eax, eax
177	ret
178	ENDPROC cpumR0SaveHostFPUState
179	%endif
180	%endif
181	%endif
182
183
184	;;
185	; Saves the guest FPU/XMM state and restores the host state.
186	;
187	; @returns 0
188	; @param pCPUMCPU x86:[esp+4] GCC:rdi MSC:rcx CPUMCPU pointer
189	;
190	align 16
191	BEGINPROC cpumR0SaveGuestRestoreHostFPUState
192	%ifdef RT_ARCH_AMD64
193	%ifdef RT_OS_WINDOWS
194	mov xDX, rcx
195	%else
196	mov xDX, rdi
197	%endif
198	%else
199	mov xDX, dword [esp + 4]
200	%endif
201
202	; Only restore FPU if guest has used it.
203	; Using fxrstor should ensure that we're not causing unwanted exception on the host.
204	test dword [xDX + CPUMCPU.fUseFlags], CPUM_USED_FPU
205	jz short .fpu_not_used
206
207	pushf ; The darwin kernel can get upset or upset things if an
208	cli ; interrupt occurs while we're doing fxsave/fxrstor/cr0.
209
210	mov xAX, cr0 ; Make sure it's safe to access the FPU state.
211	mov xCX, xAX ; save old CR0
212	and xAX, ~(X86_CR0_TS \| X86_CR0_EM)
213	mov cr0, xAX ;; @todo optimize this.
214
215	%ifdef VBOX_WITH_HYBRID_32BIT_KERNEL
216	cmp byte [NAME(g_fCPUMIs64bitHost)], 0
217	jz .legacy_mode
218	db 0xea ; jmp far .sixtyfourbit_mode
219	dd .sixtyfourbit_mode, NAME(SUPR0Abs64bitKernelCS)
220	.legacy_mode:
221	%endif ; VBOX_WITH_HYBRID_32BIT_KERNEL
222
223	fxsave [xDX + CPUMCPU.Guest.fpu] ; ASSUMES that all VT-x/AMD-V boxes support fxsave/fxrstor (safe assumption)
224	fxrstor [xDX + CPUMCPU.Host.fpu]
225
226	.done:
227	mov cr0, xCX ; and restore old CR0 again ;; @todo optimize this.
228	and dword [xDX + CPUMCPU.fUseFlags], ~CPUM_USED_FPU
229	popf
230	.fpu_not_used:
231	xor eax, eax
232	ret
233
234	%ifdef VBOX_WITH_HYBRID_32BIT_KERNEL_IN_R0
235	ALIGNCODE(16)
236	BITS 64
237	.sixtyfourbit_mode:
238	and edx, 0ffffffffh
239	fxsave [rdx + CPUMCPU.Guest.fpu]
240	fxrstor [rdx + CPUMCPU.Host.fpu]
241	jmp far [.fpret wrt rip]
242	.fpret: ; 16:32 Pointer to .the_end.
243	dd .done, NAME(SUPR0AbsKernelCS)
244	BITS 32
245	%endif
246	ENDPROC cpumR0SaveGuestRestoreHostFPUState
247
248
249	;;
250	; Sets the host's FPU/XMM state
251	;
252	; @returns 0
253	; @param pCPUMCPU x86:[esp+4] GCC:rdi MSC:rcx CPUMCPU pointer
254	;
255	align 16
256	BEGINPROC cpumR0RestoreHostFPUState
257	%ifdef RT_ARCH_AMD64
258	%ifdef RT_OS_WINDOWS
259	mov xDX, rcx
260	%else
261	mov xDX, rdi
262	%endif
263	%else
264	mov xDX, dword [esp + 4]
265	%endif
266
267	; Restore FPU if guest has used it.
268	; Using fxrstor should ensure that we're not causing unwanted exception on the host.
269	test dword [xDX + CPUMCPU.fUseFlags], CPUM_USED_FPU
270	jz short .fpu_not_used
271
272	pushf ; The darwin kernel can get upset or upset things if an
273	cli ; interrupt occurs while we're doing fxsave/fxrstor/cr0.
274
275	mov xAX, cr0
276	mov xCX, xAX ; save old CR0
277	and xAX, ~(X86_CR0_TS \| X86_CR0_EM)
278	mov cr0, xAX
279
280	%ifdef VBOX_WITH_HYBRID_32BIT_KERNEL
281	cmp byte [NAME(g_fCPUMIs64bitHost)], 0
282	jz .legacy_mode
283	db 0xea ; jmp far .sixtyfourbit_mode
284	dd .sixtyfourbit_mode, NAME(SUPR0Abs64bitKernelCS)
285	.legacy_mode:
286	%endif ; VBOX_WITH_HYBRID_32BIT_KERNEL
287
288	fxrstor [xDX + CPUMCPU.Host.fpu]
289
290	.done:
291	mov cr0, xCX ; and restore old CR0 again
292	and dword [xDX + CPUMCPU.fUseFlags], ~CPUM_USED_FPU
293	popf
294	.fpu_not_used:
295	xor eax, eax
296	ret
297
298	%ifdef VBOX_WITH_HYBRID_32BIT_KERNEL_IN_R0
299	ALIGNCODE(16)
300	BITS 64
301	.sixtyfourbit_mode:
302	and edx, 0ffffffffh
303	fxrstor [rdx + CPUMCPU.Host.fpu]
304	jmp far [.fpret wrt rip]
305	.fpret: ; 16:32 Pointer to .the_end.
306	dd .done, NAME(SUPR0AbsKernelCS)
307	BITS 32
308	%endif
309	ENDPROC cpumR0RestoreHostFPUState
310
311
312	%ifdef VBOX_WITH_HYBRID_32BIT_KERNEL_IN_R0
313	;;
314	; DECLASM(void) cpumR0SaveDRx(uint64_t *pa4Regs);
315	;
316	ALIGNCODE(16)
317	BEGINPROC cpumR0SaveDRx
318	%ifdef RT_ARCH_AMD64
319	%ifdef ASM_CALL64_GCC
320	mov xCX, rdi
321	%endif
322	%else
323	mov xCX, dword [esp + 4]
324	%endif
325	pushf ; Just to be on the safe side.
326	cli
327	%ifdef VBOX_WITH_HYBRID_32BIT_KERNEL
328	cmp byte [NAME(g_fCPUMIs64bitHost)], 0
329	jz .legacy_mode
330	db 0xea ; jmp far .sixtyfourbit_mode
331	dd .sixtyfourbit_mode, NAME(SUPR0Abs64bitKernelCS)
332	.legacy_mode:
333	%endif ; VBOX_WITH_HYBRID_32BIT_KERNEL
334
335	;
336	; Do the job.
337	;
338	mov xAX, dr0
339	mov xDX, dr1
340	mov [xCX], xAX
341	mov [xCX + 8 * 1], xDX
342	mov xAX, dr2
343	mov xDX, dr3
344	mov [xCX + 8 * 2], xAX
345	mov [xCX + 8 * 3], xDX
346
347	.done:
348	popf
349	ret
350
351	%ifdef VBOX_WITH_HYBRID_32BIT_KERNEL_IN_R0
352	ALIGNCODE(16)
353	BITS 64
354	.sixtyfourbit_mode:
355	and ecx, 0ffffffffh
356
357	mov rax, dr0
358	mov rdx, dr1
359	mov r8, dr2
360	mov r9, dr3
361	mov [rcx], rax
362	mov [rcx + 8 * 1], rdx
363	mov [rcx + 8 * 2], r8
364	mov [rcx + 8 * 3], r9
365	jmp far [.fpret wrt rip]
366	.fpret: ; 16:32 Pointer to .the_end.
367	dd .done, NAME(SUPR0AbsKernelCS)
368	BITS 32
369	%endif
370	ENDPROC cpumR0SaveDRx
371
372
373	;;
374	; DECLASM(void) cpumR0LoadDRx(uint64_t const *pa4Regs);
375	;
376	ALIGNCODE(16)
377	BEGINPROC cpumR0LoadDRx
378	%ifdef RT_ARCH_AMD64
379	%ifdef ASM_CALL64_GCC
380	mov xCX, rdi
381	%endif
382	%else
383	mov xCX, dword [esp + 4]
384	%endif
385	pushf ; Just to be on the safe side.
386	cli
387	%ifdef VBOX_WITH_HYBRID_32BIT_KERNEL
388	cmp byte [NAME(g_fCPUMIs64bitHost)], 0
389	jz .legacy_mode
390	db 0xea ; jmp far .sixtyfourbit_mode
391	dd .sixtyfourbit_mode, NAME(SUPR0Abs64bitKernelCS)
392	.legacy_mode:
393	%endif ; VBOX_WITH_HYBRID_32BIT_KERNEL
394
395	;
396	; Do the job.
397	;
398	mov xAX, [xCX]
399	mov xDX, [xCX + 8 * 1]
400	mov dr0, xAX
401	mov dr1, xDX
402	mov xAX, [xCX + 8 * 2]
403	mov xDX, [xCX + 8 * 3]
404	mov dr2, xAX
405	mov dr3, xDX
406
407	.done:
408	popf
409	ret
410
411	%ifdef VBOX_WITH_HYBRID_32BIT_KERNEL_IN_R0
412	ALIGNCODE(16)
413	BITS 64
414	.sixtyfourbit_mode:
415	and ecx, 0ffffffffh
416
417	mov rax, [rcx]
418	mov rdx, [rcx + 8 * 1]
419	mov r8, [rcx + 8 * 2]
420	mov r9, [rcx + 8 * 3]
421	mov dr0, rax
422	mov dr1, rdx
423	mov dr2, r8
424	mov dr3, r9
425	jmp far [.fpret wrt rip]
426	.fpret: ; 16:32 Pointer to .the_end.
427	dd .done, NAME(SUPR0AbsKernelCS)
428	BITS 32
429	%endif
430	ENDPROC cpumR0LoadDRx
431
432	%endif ; VBOX_WITH_HYBRID_32BIT_KERNEL_IN_R0
433

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source: vbox/trunk/src/VBox/VMM/VMMR0/CPUMR0A.asm@ 26234

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