CPUMGCA.asm@ 23911

Last change on this file since 23911 was 13960, checked in by vboxsync, 16 years ago
Moved guest and host CPU contexts into per-VCPU array.
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 11.8 KB

Line
1	; $Id: CPUMGCA.asm 13960 2008-11-07 13:04:45Z vboxsync $
2	;; @file
3	; CPUM - Guest Context Assembly Routines.
4	;
5
6	; Copyright (C) 2006-2007 Sun Microsystems, Inc.
7	;
8	; This file is part of VirtualBox Open Source Edition (OSE), as
9	; available from http://www.virtualbox.org. This file is free software;
10	; you can redistribute it and/or modify it under the terms of the GNU
11	; General Public License (GPL) as published by the Free Software
12	; Foundation, in version 2 as it comes in the "COPYING" file of the
13	; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
14	; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
15	;
16	; Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
17	; Clara, CA 95054 USA or visit http://www.sun.com if you need
18	; additional information or have any questions.
19	;
20
21	;*******************************************************************************
22	;* Header Files *
23	;*******************************************************************************
24	%include "VMMGC.mac"
25	%include "VBox/vm.mac"
26	%include "VBox/err.mac"
27	%include "VBox/stam.mac"
28	%include "CPUMInternal.mac"
29	%include "VBox/x86.mac"
30	%include "VBox/cpum.mac"
31
32
33	;*******************************************************************************
34	;* External Symbols *
35	;*******************************************************************************
36	extern IMPNAME(g_CPUM) ; VMM GC Builtin import
37	extern IMPNAME(g_VM) ; VMM GC Builtin import
38	extern NAME(cpumGCHandleNPAndGP) ; CPUMGC.cpp
39
40	;
41	; Enables write protection of Hypervisor memory pages.
42	; !note! Must be commented out for Trap8 debug handler.
43	;
44	%define ENABLE_WRITE_PROTECTION 1
45
46	BEGINCODE
47
48
49	;;
50	; Restores GC context before doing iret.
51	;
52	; @param [esp + 4] Pointer to interrupt stack frame, i.e. pointer
53	; to the a struct with this layout:
54	; 00h eip
55	; 04h cs
56	; 08h eflags
57	; 0ch esp
58	; 10h ss
59	; 14h es (V86 only)
60	; 18h ds (V86 only)
61	; 1Ch fs (V86 only)
62	; 20h gs (V86 only)
63	;
64	; @uses everything but cs, ss, esp, and eflags.
65	;
66	; @remark Assumes we're restoring in Ring-0 a context which is not Ring-0.
67	; Further assumes flat stack and valid ds.
68
69	BEGINPROC CPUMGCRestoreInt
70	;
71	; Update iret frame.
72	;
73	mov eax, [esp + 4] ; get argument
74	mov edx, IMP(g_CPUM)
75	; Convert to CPUMCPU pointer
76	add edx, [edx + CPUM.ulOffCPUMCPU]
77
78	mov ecx, [edx + CPUMCPU.Guest.eip]
79	mov [eax + 0h], ecx
80	mov ecx, [edx + CPUMCPU.Guest.cs]
81	mov [eax + 4h], ecx
82	mov ecx, [edx + CPUMCPU.Guest.eflags]
83	mov [eax + 8h], ecx
84	mov ecx, [edx + CPUMCPU.Guest.esp]
85	mov [eax + 0ch], ecx
86	mov ecx, [edx + CPUMCPU.Guest.ss]
87	mov [eax + 10h], ecx
88
89	test dword [edx + CPUMCPU.Guest.eflags], X86_EFL_VM
90	jnz short CPUMGCRestoreInt_V86
91
92	;
93	; Load registers.
94	;
95	; todo: potential trouble loading invalid es,fs,gs,ds because
96	; of a VMM imposed exception?
97	mov es, [edx + CPUMCPU.Guest.es]
98	mov fs, [edx + CPUMCPU.Guest.fs]
99	mov gs, [edx + CPUMCPU.Guest.gs]
100	mov esi, [edx + CPUMCPU.Guest.esi]
101	mov edi, [edx + CPUMCPU.Guest.edi]
102	mov ebp, [edx + CPUMCPU.Guest.ebp]
103	mov ebx, [edx + CPUMCPU.Guest.ebx]
104	mov ecx, [edx + CPUMCPU.Guest.ecx]
105	mov eax, [edx + CPUMCPU.Guest.eax]
106	push dword [edx + CPUMCPU.Guest.ds]
107	mov edx, [edx + CPUMCPU.Guest.edx]
108	pop ds
109
110	ret
111
112	CPUMGCRestoreInt_V86:
113	; iret restores ds, es, fs & gs
114	mov ecx, [edx + CPUMCPU.Guest.es]
115	mov [eax + 14h], ecx
116	mov ecx, [edx + CPUMCPU.Guest.ds]
117	mov [eax + 18h], ecx
118	mov ecx, [edx + CPUMCPU.Guest.fs]
119	mov [eax + 1Ch], ecx
120	mov ecx, [edx + CPUMCPU.Guest.gs]
121	mov [eax + 20h], ecx
122	mov esi, [edx + CPUMCPU.Guest.esi]
123	mov edi, [edx + CPUMCPU.Guest.edi]
124	mov ebp, [edx + CPUMCPU.Guest.ebp]
125	mov ebx, [edx + CPUMCPU.Guest.ebx]
126	mov ecx, [edx + CPUMCPU.Guest.ecx]
127	mov eax, [edx + CPUMCPU.Guest.eax]
128	mov edx, [edx + CPUMCPU.Guest.edx]
129	ret
130
131	ENDPROC CPUMGCRestoreInt
132
133
134	;;
135	; Calls a guest trap/interrupt handler directly
136	; Assumes a trap stack frame has already been setup on the guest's stack!
137	;
138	; @param pRegFrame [esp + 4] Original trap/interrupt context
139	; @param selCS [esp + 8] Code selector of handler
140	; @param pHandler [esp + 12] GC virtual address of handler
141	; @param eflags [esp + 16] Callee's EFLAGS
142	; @param selSS [esp + 20] Stack selector for handler
143	; @param pEsp [esp + 24] Stack address for handler
144	;
145	; @remark This call never returns!
146	;
147	; VMMRCDECL(void) CPUMGCCallGuestTrapHandler(PCPUMCTXCORE pRegFrame, uint32_t selCS, RTGCPTR pHandler, uint32_t eflags, uint32_t selSS, RTGCPTR pEsp);
148	align 16
149	BEGINPROC_EXPORTED CPUMGCCallGuestTrapHandler
150	mov ebp, esp
151
152	; construct iret stack frame
153	push dword [ebp + 20] ; SS
154	push dword [ebp + 24] ; ESP
155	push dword [ebp + 16] ; EFLAGS
156	push dword [ebp + 8] ; CS
157	push dword [ebp + 12] ; EIP
158
159	;
160	; enable WP
161	;
162	%ifdef ENABLE_WRITE_PROTECTION
163	mov eax, cr0
164	or eax, X86_CR0_WRITE_PROTECT
165	mov cr0, eax
166	%endif
167
168	; restore CPU context (all except cs, eip, ss, esp & eflags; which are restored or overwritten by iret)
169	mov ebp, [ebp + 4] ; pRegFrame
170	mov ebx, [ebp + CPUMCTXCORE.ebx]
171	mov ecx, [ebp + CPUMCTXCORE.ecx]
172	mov edx, [ebp + CPUMCTXCORE.edx]
173	mov esi, [ebp + CPUMCTXCORE.esi]
174	mov edi, [ebp + CPUMCTXCORE.edi]
175
176	;; @todo load segment registers before enabling WP.
177	TRPM_NP_GP_HANDLER NAME(cpumGCHandleNPAndGP), CPUM_HANDLER_GS \| CPUM_HANDLER_CTXCORE_IN_EBP
178	mov gs, [ebp + CPUMCTXCORE.gs]
179	TRPM_NP_GP_HANDLER NAME(cpumGCHandleNPAndGP), CPUM_HANDLER_FS \| CPUM_HANDLER_CTXCORE_IN_EBP
180	mov fs, [ebp + CPUMCTXCORE.fs]
181	TRPM_NP_GP_HANDLER NAME(cpumGCHandleNPAndGP), CPUM_HANDLER_ES \| CPUM_HANDLER_CTXCORE_IN_EBP
182	mov es, [ebp + CPUMCTXCORE.es]
183	TRPM_NP_GP_HANDLER NAME(cpumGCHandleNPAndGP), CPUM_HANDLER_DS \| CPUM_HANDLER_CTXCORE_IN_EBP
184	mov ds, [ebp + CPUMCTXCORE.ds]
185
186	mov eax, [ebp + CPUMCTXCORE.eax]
187	mov ebp, [ebp + CPUMCTXCORE.ebp]
188
189	TRPM_NP_GP_HANDLER NAME(cpumGCHandleNPAndGP), CPUM_HANDLER_IRET
190	iret
191	ENDPROC CPUMGCCallGuestTrapHandler
192
193
194	;;
195	; Performs an iret to V86 code
196	; Assumes a trap stack frame has already been setup on the guest's stack!
197	;
198	; @param pRegFrame Original trap/interrupt context
199	;
200	; This function does not return!
201	;
202	;VMMRCDECL(void) CPUMGCCallV86Code(PCPUMCTXCORE pRegFrame);
203	align 16
204	BEGINPROC CPUMGCCallV86Code
205	mov ebp, [esp + 4] ; pRegFrame
206
207	; construct iret stack frame
208	push dword [ebp + CPUMCTXCORE.gs]
209	push dword [ebp + CPUMCTXCORE.fs]
210	push dword [ebp + CPUMCTXCORE.ds]
211	push dword [ebp + CPUMCTXCORE.es]
212	push dword [ebp + CPUMCTXCORE.ss]
213	push dword [ebp + CPUMCTXCORE.esp]
214	push dword [ebp + CPUMCTXCORE.eflags]
215	push dword [ebp + CPUMCTXCORE.cs]
216	push dword [ebp + CPUMCTXCORE.eip]
217
218	;
219	; enable WP
220	;
221	%ifdef ENABLE_WRITE_PROTECTION
222	mov eax, cr0
223	or eax, X86_CR0_WRITE_PROTECT
224	mov cr0, eax
225	%endif
226
227	; restore CPU context (all except cs, eip, ss, esp, eflags, ds, es, fs & gs; which are restored or overwritten by iret)
228	mov eax, [ebp + CPUMCTXCORE.eax]
229	mov ebx, [ebp + CPUMCTXCORE.ebx]
230	mov ecx, [ebp + CPUMCTXCORE.ecx]
231	mov edx, [ebp + CPUMCTXCORE.edx]
232	mov esi, [ebp + CPUMCTXCORE.esi]
233	mov edi, [ebp + CPUMCTXCORE.edi]
234	mov ebp, [ebp + CPUMCTXCORE.ebp]
235
236	TRPM_NP_GP_HANDLER NAME(cpumGCHandleNPAndGP), CPUM_HANDLER_IRET
237	iret
238	ENDPROC CPUMGCCallV86Code
239
240
241	;;
242	; This is a main entry point for resuming (or starting) guest
243	; code execution.
244	;
245	; We get here directly from VMMSwitcher.asm (jmp at the end
246	; of VMMSwitcher_HostToGuest).
247	;
248	; This call never returns!
249	;
250	; @param edx Pointer to CPUM structure.
251	;
252	align 16
253	BEGINPROC_EXPORTED CPUMGCResumeGuest
254	; Convert to CPUMCPU pointer
255	add edx, [edx + CPUM.ulOffCPUMCPU]
256	;
257	; Setup iretd
258	;
259	push dword [edx + CPUMCPU.Guest.ss]
260	push dword [edx + CPUMCPU.Guest.esp]
261	push dword [edx + CPUMCPU.Guest.eflags]
262	push dword [edx + CPUMCPU.Guest.cs]
263	push dword [edx + CPUMCPU.Guest.eip]
264
265	;
266	; Restore registers.
267	;
268	TRPM_NP_GP_HANDLER NAME(cpumGCHandleNPAndGP), CPUM_HANDLER_ES
269	mov es, [edx + CPUMCPU.Guest.es]
270	TRPM_NP_GP_HANDLER NAME(cpumGCHandleNPAndGP), CPUM_HANDLER_FS
271	mov fs, [edx + CPUMCPU.Guest.fs]
272	TRPM_NP_GP_HANDLER NAME(cpumGCHandleNPAndGP), CPUM_HANDLER_GS
273	mov gs, [edx + CPUMCPU.Guest.gs]
274
275	%ifdef VBOX_WITH_STATISTICS
276	;
277	; Statistics.
278	;
279	push edx
280	mov edx, IMP(g_VM)
281	lea edx, [edx + VM.StatTotalQemuToGC]
282	STAM_PROFILE_ADV_STOP edx
283
284	mov edx, IMP(g_VM)
285	lea edx, [edx + VM.StatTotalInGC]
286	STAM_PROFILE_ADV_START edx
287	pop edx
288	%endif
289
290	;
291	; enable WP
292	;
293	%ifdef ENABLE_WRITE_PROTECTION
294	mov eax, cr0
295	or eax, X86_CR0_WRITE_PROTECT
296	mov cr0, eax
297	%endif
298
299	;
300	; Continue restore.
301	;
302	mov esi, [edx + CPUMCPU.Guest.esi]
303	mov edi, [edx + CPUMCPU.Guest.edi]
304	mov ebp, [edx + CPUMCPU.Guest.ebp]
305	mov ebx, [edx + CPUMCPU.Guest.ebx]
306	mov ecx, [edx + CPUMCPU.Guest.ecx]
307	mov eax, [edx + CPUMCPU.Guest.eax]
308	push dword [edx + CPUMCPU.Guest.ds]
309	mov edx, [edx + CPUMCPU.Guest.edx]
310	TRPM_NP_GP_HANDLER NAME(cpumGCHandleNPAndGP), CPUM_HANDLER_DS
311	pop ds
312
313	; restart execution.
314	TRPM_NP_GP_HANDLER NAME(cpumGCHandleNPAndGP), CPUM_HANDLER_IRET
315	iretd
316	ENDPROC CPUMGCResumeGuest
317
318
319	;;
320	; This is a main entry point for resuming (or starting) guest
321	; code execution for raw V86 mode
322	;
323	; We get here directly from VMMSwitcher.asm (jmp at the end
324	; of VMMSwitcher_HostToGuest).
325	;
326	; This call never returns!
327	;
328	; @param edx Pointer to CPUM structure.
329	;
330	align 16
331	BEGINPROC_EXPORTED CPUMGCResumeGuestV86
332	; Convert to CPUMCPU pointer
333	add edx, [edx + CPUM.ulOffCPUMCPU]
334	;
335	; Setup iretd
336	;
337	push dword [edx + CPUMCPU.Guest.gs]
338	push dword [edx + CPUMCPU.Guest.fs]
339	push dword [edx + CPUMCPU.Guest.ds]
340	push dword [edx + CPUMCPU.Guest.es]
341
342	push dword [edx + CPUMCPU.Guest.ss]
343	push dword [edx + CPUMCPU.Guest.esp]
344
345	push dword [edx + CPUMCPU.Guest.eflags]
346	push dword [edx + CPUMCPU.Guest.cs]
347	push dword [edx + CPUMCPU.Guest.eip]
348
349	;
350	; Restore registers.
351	;
352
353	%ifdef VBOX_WITH_STATISTICS
354	;
355	; Statistics.
356	;
357	push edx
358	mov edx, IMP(g_VM)
359	lea edx, [edx + VM.StatTotalQemuToGC]
360	STAM_PROFILE_ADV_STOP edx
361
362	mov edx, IMP(g_VM)
363	lea edx, [edx + VM.StatTotalInGC]
364	STAM_PROFILE_ADV_START edx
365	pop edx
366	%endif
367
368	;
369	; enable WP
370	;
371	%ifdef ENABLE_WRITE_PROTECTION
372	mov eax, cr0
373	or eax, X86_CR0_WRITE_PROTECT
374	mov cr0, eax
375	%endif
376
377	;
378	; Continue restore.
379	;
380	mov esi, [edx + CPUMCPU.Guest.esi]
381	mov edi, [edx + CPUMCPU.Guest.edi]
382	mov ebp, [edx + CPUMCPU.Guest.ebp]
383	mov ecx, [edx + CPUMCPU.Guest.ecx]
384	mov ebx, [edx + CPUMCPU.Guest.ebx]
385	mov eax, [edx + CPUMCPU.Guest.eax]
386	mov edx, [edx + CPUMCPU.Guest.edx]
387
388	; restart execution.
389	TRPM_NP_GP_HANDLER NAME(cpumGCHandleNPAndGP), CPUM_HANDLER_IRET
390	iretd
391	ENDPROC CPUMGCResumeGuestV86
392

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source: vbox/trunk/src/VBox/VMM/VMMGC/CPUMGCA.asm@ 23911

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