TRPMGCHandlersA.asm@ 11347

Last change on this file since 11347 was 9714, checked in by vboxsync, 17 years ago
Zero out high dword of rsp as well.
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 42.7 KB

Line
1	; $Id: TRPMGCHandlersA.asm 9714 2008-06-16 11:58:28Z vboxsync $
2	;; @file
3	; TRPM - Guest Context Trap Handlers
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/x86.mac"
26	%include "VBox/cpum.mac"
27	%include "VBox/stam.mac"
28	%include "VBox/vm.mac"
29	%include "TRPMInternal.mac"
30	%include "VBox/err.mac"
31	%include "VBox/trpm.mac"
32
33
34	;*******************************************************************************
35	;* External Symbols *
36	;*******************************************************************************
37	extern IMPNAME(g_CPUM) ; These IMPNAME(g_*) symbols resolve to the import table
38	extern IMPNAME(g_TRPM) ; where there is a pointer to the real symbol. PE imports
39	extern IMPNAME(g_VM) ; are a bit confusing at first... :-)
40	extern NAME(CPUMGCRestoreInt)
41	extern NAME(CPUMHandleLazyFPUAsm)
42	extern NAME(CPUMHyperSetCtxCore)
43	extern NAME(trpmGCTrapInGeneric)
44	extern NAME(TRPMGCHyperTrap0bHandler)
45	extern NAME(TRPMGCHyperTrap0dHandler)
46	extern NAME(TRPMGCHyperTrap0eHandler)
47	extern NAME(TRPMGCTrap01Handler)
48	%ifdef VBOX_WITH_NMI
49	extern NAME(TRPMGCTrap02Handler)
50	%endif
51	extern NAME(TRPMGCTrap03Handler)
52	extern NAME(TRPMGCTrap06Handler)
53	extern NAME(TRPMGCTrap0bHandler)
54	extern NAME(TRPMGCTrap0dHandler)
55	extern NAME(TRPMGCTrap0eHandler)
56	extern NAME(TRPMGCTrap07Handler)
57
58	;; IMPORTANT all COM_ functions trashes esi, some edi and the LOOP_SHORT_WHILE kills ecx.
59	;%define DEBUG_STUFF 1
60	;%define DEBUG_STUFF_TRPG 1
61	;%define DEBUG_STUFF_INT 1
62
63	BEGINCODE
64
65	;;
66	; Jump table for trap handlers for hypervisor traps.
67	;
68	g_apfnStaticTrapHandlersHyper:
69	; N - M M - T - C - D i
70	; o - n o - y - o - e p
71	; - e n - p - d - s t
72	; - i - e - e - c .
73	; - c - - - r
74	; =============================================================
75	dd 0 ; 0 - #DE - F - N - Divide error
76	dd NAME(TRPMGCTrap01Handler) ; 1 - #DB - F/T - N - Single step, INT 1 instruction
77	%ifdef VBOX_WITH_NMI
78	dd NAME(TRPMGCTrap02Handler) ; 2 - - I - N - Non-Maskable Interrupt (NMI)
79	%else
80	dd 0 ; 2 - - I - N - Non-Maskable Interrupt (NMI)
81	%endif
82	dd NAME(TRPMGCTrap03Handler) ; 3 - #BP - T - N - Breakpoint, INT 3 instruction.
83	dd 0 ; 4 - #OF - T - N - Overflow, INTO instruction.
84	dd 0 ; 5 - #BR - F - N - BOUND Range Exceeded, BOUND instruction.
85	dd 0 ; 6 - #UD - F - N - Undefined(/Invalid) Opcode.
86	dd 0 ; 7 - #NM - F - N - Device not available, FP or (F)WAIT instruction.
87	dd 0 ; 8 - #DF - A - 0 - Double fault.
88	dd 0 ; 9 - - F - N - Coprocessor Segment Overrun (obsolete).
89	dd 0 ; a - #TS - F - Y - Invalid TSS, Taskswitch or TSS access.
90	dd NAME(TRPMGCHyperTrap0bHandler) ; b - #NP - F - Y - Segment not present.
91	dd 0 ; c - #SS - F - Y - Stack-Segment fault.
92	dd NAME(TRPMGCHyperTrap0dHandler) ; d - #GP - F - Y - General protection fault.
93	dd NAME(TRPMGCHyperTrap0eHandler) ; e - #PF - F - Y - Page fault.
94	dd 0 ; f - - - - Intel Reserved. Do not use.
95	dd 0 ; 10 - #MF - F - N - x86 FPU Floating-Point Error (Math fault), FP or (F)WAIT instruction.
96	dd 0 ; 11 - #AC - F - 0 - Alignment Check.
97	dd 0 ; 12 - #MC - A - N - Machine Check.
98	dd 0 ; 13 - #XF - F - N - SIMD Floating-Point Exception.
99	dd 0 ; 14 - - - - Intel Reserved. Do not use.
100	dd 0 ; 15 - - - - Intel Reserved. Do not use.
101	dd 0 ; 16 - - - - Intel Reserved. Do not use.
102	dd 0 ; 17 - - - - Intel Reserved. Do not use.
103	dd 0 ; 18 - - - - Intel Reserved. Do not use.
104
105
106	;;
107	; Jump table for trap handlers for guest traps
108	;
109	g_apfnStaticTrapHandlersGuest:
110	; N - M M - T - C - D i
111	; o - n o - y - o - e p
112	; - e n - p - d - s t
113	; - i - e - e - c .
114	; - c - - - r
115	; =============================================================
116	dd 0 ; 0 - #DE - F - N - Divide error
117	dd NAME(TRPMGCTrap01Handler) ; 1 - #DB - F/T - N - Single step, INT 1 instruction
118	%ifdef VBOX_WITH_NMI
119	dd NAME(TRPMGCTrap02Handler) ; 2 - - I - N - Non-Maskable Interrupt (NMI)
120	%else
121	dd 0 ; 2 - - I - N - Non-Maskable Interrupt (NMI)
122	%endif
123	dd NAME(TRPMGCTrap03Handler) ; 3 - #BP - T - N - Breakpoint, INT 3 instruction.
124	dd 0 ; 4 - #OF - T - N - Overflow, INTO instruction.
125	dd 0 ; 5 - #BR - F - N - BOUND Range Exceeded, BOUND instruction.
126	dd NAME(TRPMGCTrap06Handler) ; 6 - #UD - F - N - Undefined(/Invalid) Opcode.
127	dd NAME(TRPMGCTrap07Handler) ; 7 - #NM - F - N - Device not available, FP or (F)WAIT instruction.
128	dd 0 ; 8 - #DF - A - 0 - Double fault.
129	dd 0 ; 9 - - F - N - Coprocessor Segment Overrun (obsolete).
130	dd 0 ; a - #TS - F - Y - Invalid TSS, Taskswitch or TSS access.
131	dd NAME(TRPMGCTrap0bHandler) ; b - #NP - F - Y - Segment not present.
132	dd 0 ; c - #SS - F - Y - Stack-Segment fault.
133	dd NAME(TRPMGCTrap0dHandler) ; d - #GP - F - Y - General protection fault.
134	dd NAME(TRPMGCTrap0eHandler) ; e - #PF - F - Y - Page fault.
135	dd 0 ; f - - - - Intel Reserved. Do not use.
136	dd 0 ; 10 - #MF - F - N - x86 FPU Floating-Point Error (Math fault), FP or (F)WAIT instruction.
137	dd 0 ; 11 - #AC - F - 0 - Alignment Check.
138	dd 0 ; 12 - #MC - A - N - Machine Check.
139	dd 0 ; 13 - #XF - F - N - SIMD Floating-Point Exception.
140	dd 0 ; 14 - - - - Intel Reserved. Do not use.
141	dd 0 ; 15 - - - - Intel Reserved. Do not use.
142	dd 0 ; 16 - - - - Intel Reserved. Do not use.
143	dd 0 ; 17 - - - - Intel Reserved. Do not use.
144	dd 0 ; 18 - - - - Intel Reserved. Do not use.
145
146
147
148	;;
149	; We start by 24 push <vector no.> + jmp <generic entry point>
150	;
151	ALIGNCODE(16)
152	BEGINPROC_EXPORTED TRPMGCHandlerGeneric
153	%macro TRPMGenericEntry 1
154	db 06ah, i ; push imm8 - note that this is a signextended value.
155	jmp %1
156	ALIGNCODE(8)
157	%assign i i+1
158	%endmacro
159
160	%assign i 0 ; start counter.
161	TRPMGenericEntry GenericTrap ; 0
162	TRPMGenericEntry GenericTrap ; 1
163	TRPMGenericEntry GenericTrap ; 2
164	TRPMGenericEntry GenericTrap ; 3
165	TRPMGenericEntry GenericTrap ; 4
166	TRPMGenericEntry GenericTrap ; 5
167	TRPMGenericEntry GenericTrap ; 6
168	TRPMGenericEntry GenericTrap ; 7
169	TRPMGenericEntry GenericTrapErrCode ; 8
170	TRPMGenericEntry GenericTrap ; 9
171	TRPMGenericEntry GenericTrapErrCode ; a
172	TRPMGenericEntry GenericTrapErrCode ; b
173	TRPMGenericEntry GenericTrapErrCode ; c
174	TRPMGenericEntry GenericTrapErrCode ; d
175	TRPMGenericEntry GenericTrapErrCode ; e
176	TRPMGenericEntry GenericTrap ; f (reserved)
177	TRPMGenericEntry GenericTrap ; 10
178	TRPMGenericEntry GenericTrapErrCode ; 11
179	TRPMGenericEntry GenericTrap ; 12
180	TRPMGenericEntry GenericTrap ; 13
181	TRPMGenericEntry GenericTrap ; 14 (reserved)
182	TRPMGenericEntry GenericTrap ; 15 (reserved)
183	TRPMGenericEntry GenericTrap ; 16 (reserved)
184	TRPMGenericEntry GenericTrap ; 17 (reserved)
185	%undef i
186	%undef TRPMGenericEntry
187
188	;;
189	; Main exception handler for the guest context
190	;
191	; Stack:
192	; 14 SS
193	; 10 ESP
194	; c EFLAGS
195	; 8 CS
196	; 4 EIP
197	; 0 vector number
198	;
199	; @uses none
200	;
201	ALIGNCODE(8)
202	GenericTrap:
203	;
204	; for the present we fake an error code ~0
205	;
206	push eax
207	mov eax, 0ffffffffh
208	xchg [esp + 4], eax ; get vector number, set error code
209	xchg [esp], eax ; get saved eax, set vector number
210	jmp short GenericTrapErrCode
211
212
213	;;
214	; Main exception handler for the guest context with error code
215	;
216	; Stack:
217	; 28 GS (V86 only)
218	; 24 FS (V86 only)
219	; 20 DS (V86 only)
220	; 1C ES (V86 only)
221	; 18 SS (only if ring transition.)
222	; 14 ESP (only if ring transition.)
223	; 10 EFLAGS
224	; c CS
225	; 8 EIP
226	; 4 Error code. (~0 for vectors which don't take an error code.)
227	; 0 vector number
228	;
229	; Error code:
230	;
231	; 31 16 15 3 2 1 0
232	;
233	; reserved segment TI IDT EXT
234	; selector GDT/LDT (1) IDT External interrupt
235	; index (IDT=0) index
236	;
237	; NOTE: Page faults (trap 14) have a different error code
238	;
239	; @uses none
240	;
241	ALIGNCODE(8)
242	GenericTrapErrCode:
243	cld
244
245	;
246	; Setup CPUMCTXCORE frame
247	;
248	; ASSUMPTION: If trap in hypervisor, we assume that we can read two dword
249	; under the bottom of the stack. This is atm safe.
250	; ASSUMPTION: There is sufficient stack space.
251	; ASSUMPTION: The stack is not write protected.
252	;
253	%define ESPOFF CPUMCTXCORE_size
254
255	sub esp, CPUMCTXCORE_size
256	mov [esp + CPUMCTXCORE.eax], eax
257	mov [esp + CPUMCTXCORE.ecx], ecx
258	mov [esp + CPUMCTXCORE.edx], edx
259	mov [esp + CPUMCTXCORE.ebx], ebx
260	mov [esp + CPUMCTXCORE.esi], esi
261	mov [esp + CPUMCTXCORE.edi], edi
262	mov [esp + CPUMCTXCORE.ebp], ebp
263
264	mov eax, [esp + 14h + ESPOFF] ; esp
265	mov [esp + CPUMCTXCORE.esp], eax
266	%if GC_ARCH_BITS == 64
267	; zero out the high dword
268	mov dword [esp + CPUMCTXCORE.esp + 4], 0
269	%endif
270	mov eax, [esp + 18h + ESPOFF] ; ss
271	mov dword [esp + CPUMCTXCORE.ss], eax
272
273	mov eax, [esp + 0ch + ESPOFF] ; cs
274	mov dword [esp + CPUMCTXCORE.cs], eax
275	mov eax, [esp + 08h + ESPOFF] ; eip
276	mov [esp + CPUMCTXCORE.eip], eax
277	%if GC_ARCH_BITS == 64
278	; zero out the high dword
279	mov dword [esp + CPUMCTXCORE.eip + 4], 0
280	%endif
281	mov eax, [esp + 10h + ESPOFF] ; eflags
282	mov [esp + CPUMCTXCORE.eflags], eax
283
284	mov eax, es
285	mov dword [esp + CPUMCTXCORE.es], eax
286	mov eax, ds
287	mov dword [esp + CPUMCTXCORE.ds], eax
288	mov eax, fs
289	mov dword [esp + CPUMCTXCORE.fs], eax
290	mov eax, gs
291	mov dword [esp + CPUMCTXCORE.gs], eax
292
293	test dword [esp + CPUMCTXCORE.eflags], X86_EFL_VM
294	jz short gt_SkipV86Entry
295
296	;
297	; The DS, ES, FS and GS registers are zeroed in V86 mode and their real values are on the stack
298	;
299	mov eax, dword [esp + ESPOFF + 1Ch]
300	mov dword [esp + CPUMCTXCORE.es], eax
301
302	mov eax, dword [esp + ESPOFF + 20h]
303	mov dword [esp + CPUMCTXCORE.ds], eax
304
305	mov eax, dword [esp + ESPOFF + 24h]
306	mov dword [esp + CPUMCTXCORE.fs], eax
307
308	mov eax, dword [esp + ESPOFF + 28h]
309	mov dword [esp + CPUMCTXCORE.gs], eax
310
311	gt_SkipV86Entry:
312	;
313	; Disable Ring-0 WP
314	;
315	mov eax, cr0 ;; @todo elimitate this read?
316	and eax, ~X86_CR0_WRITE_PROTECT
317	mov cr0, eax
318
319	;
320	; Load Hypervisor DS and ES (get it from the SS)
321	;
322	mov eax, ss
323	mov ds, eax
324	mov es, eax
325
326	%ifdef VBOX_WITH_STATISTICS
327	;
328	; Start profiling.
329	;
330	mov edx, [esp + 0h + ESPOFF] ; vector number
331	imul edx, edx, byte STAMPROFILEADV_size ; assumes < 128.
332	add edx, TRPM.aStatGCTraps
333	add edx, IMP(g_TRPM)
334	STAM_PROFILE_ADV_START edx
335	%endif
336
337	;
338	; Store the information about the active trap/interrupt.
339	;
340	mov eax, IMP(g_TRPM)
341	movzx edx, byte [esp + 0h + ESPOFF] ; vector number
342	mov [eax + TRPM.uActiveVector], edx
343	mov edx, [esp + 4h + ESPOFF] ; error code
344	mov [eax + TRPM.uActiveErrorCode], edx
345	mov dword [eax + TRPM.enmActiveType], TRPM_TRAP
346	mov edx, cr2 ;; @todo Check how expensive cr2 reads are!
347	mov dword [eax + TRPM.uActiveCR2], edx
348
349	%if GC_ARCH_BITS == 64
350	; zero out the high dword
351	mov dword [eax + TRPM.uActiveErrorCode + 4], 0
352	mov dword [eax + TRPM.uActiveCR2 + 4], 0
353	%endif
354
355	;
356	; Check if we're in Hypervisor when this happend.
357	;
358	test dword [esp + CPUMCTXCORE.eflags], X86_EFL_VM
359	jnz short gt_NotHyperVisor
360
361	test byte [esp + 0ch + ESPOFF], 3h ; check CPL of the cs selector
362	jz near gt_InHypervisor
363
364	;
365	; Trap in guest code.
366	;
367	gt_NotHyperVisor:
368	%ifdef DEBUG_STUFF_TRPG
369	mov ebx, [esp + 4h + ESPOFF] ; error code
370	mov ecx, 'trpG' ; indicate trap.
371	mov edx, [esp + 0h + ESPOFF] ; vector number
372	lea eax, [esp]
373	call trpmDbgDumpRegisterFrame
374	%endif
375
376	;
377	; Do we have a GC handler for these traps?
378	;
379	mov edx, [esp + 0h + ESPOFF] ; vector number
380	mov eax, [g_apfnStaticTrapHandlersGuest + edx * 4]
381	or eax, eax
382	jnz short gt_HaveHandler
383	mov eax, VINF_EM_RAW_GUEST_TRAP
384	jmp short gt_GuestTrap
385
386	;
387	; Call static handler.
388	;
389	gt_HaveHandler:
390	push esp ; Param 2 - CPUMCTXCORE pointer.
391	push dword IMP(g_TRPM) ; Param 1 - Pointer to TRPM
392	call eax
393	add esp, byte 8 ; cleanup stack (cdecl)
394	or eax, eax
395	je near gt_continue_guest
396
397	;
398	; Switch back to the host and process it there.
399	;
400	gt_GuestTrap:
401	%ifdef VBOX_WITH_STATISTICS
402	mov edx, [esp + 0h + ESPOFF] ; vector number
403	imul edx, edx, byte STAMPROFILEADV_size ; assume < 128
404	add edx, IMP(g_TRPM)
405	add edx, TRPM.aStatGCTraps
406	STAM_PROFILE_ADV_STOP edx
407	%endif
408	mov edx, IMP(g_VM)
409	call [edx + VM.pfnVMMGCGuestToHostAsmGuestCtx]
410
411	;; @todo r=bird: is this path actually every taken? if not we should replace this code with a panic.
412	;
413	; We've returned!
414	; N.B. The stack has been changed now! No CPUMCTXCORE any longer. esp = vector number.
415	; N.B. Current scheduling design causes this code path to be unused.
416	; N.B. Better not use it when in V86 mode!
417	;
418
419	; Enable WP
420	mov eax, cr0 ;; @todo try elimiate this read.
421	or eax, X86_CR0_WRITE_PROTECT
422	mov cr0, eax
423	; Restore guest context and continue execution.
424	mov edx, IMP(g_CPUM)
425	lea eax, [esp + 8]
426	push eax
427	call NAME(CPUMGCRestoreInt)
428	lea esp, [esp + 0ch] ; cleanup call and skip vector & error code.
429
430	iret
431
432
433	;
434	; Continue(/Resume/Restart/Whatever) guest execution.
435	;
436	ALIGNCODE(16)
437	gt_continue_guest:
438	%ifdef VBOX_WITH_STATISTICS
439	mov edx, [esp + 0h + ESPOFF] ; vector number
440	imul edx, edx, byte STAMPROFILEADV_size ; assumes < 128
441	add edx, TRPM.aStatGCTraps
442	add edx, IMP(g_TRPM)
443	STAM_PROFILE_ADV_STOP edx
444	%endif
445
446	; enable WP
447	mov eax, cr0 ;; @todo try elimiate this read.
448	or eax, X86_CR0_WRITE_PROTECT
449	mov cr0, eax
450
451	; restore guest state and start executing again.
452	test dword [esp + CPUMCTXCORE.eflags], X86_EFL_VM
453	jnz gt_V86Return
454
455	mov ecx, [esp + CPUMCTXCORE.ecx]
456	mov edx, [esp + CPUMCTXCORE.edx]
457	mov ebx, [esp + CPUMCTXCORE.ebx]
458	mov ebp, [esp + CPUMCTXCORE.ebp]
459	mov esi, [esp + CPUMCTXCORE.esi]
460	mov edi, [esp + CPUMCTXCORE.edi]
461
462	mov eax, [esp + CPUMCTXCORE.esp]
463	mov [esp + 14h + ESPOFF], eax ; esp
464	mov eax, dword [esp + CPUMCTXCORE.ss]
465	mov [esp + 18h + ESPOFF], eax ; ss
466
467	mov eax, dword [esp + CPUMCTXCORE.gs]
468	TRPM_NP_GP_HANDLER NAME(trpmGCTrapInGeneric), TRPM_TRAP_IN_MOV_GS
469	mov gs, eax
470
471	mov eax, dword [esp + CPUMCTXCORE.fs]
472	TRPM_NP_GP_HANDLER NAME(trpmGCTrapInGeneric), TRPM_TRAP_IN_MOV_FS
473	mov fs, eax
474
475	mov eax, dword [esp + CPUMCTXCORE.es]
476	TRPM_NP_GP_HANDLER NAME(trpmGCTrapInGeneric), TRPM_TRAP_IN_MOV_ES
477	mov es, eax
478
479	mov eax, dword [esp + CPUMCTXCORE.ds]
480	TRPM_NP_GP_HANDLER NAME(trpmGCTrapInGeneric), TRPM_TRAP_IN_MOV_DS
481	mov ds, eax
482
483	mov eax, dword [esp + CPUMCTXCORE.cs]
484	mov [esp + 0ch + ESPOFF], eax ; cs
485	mov eax, [esp + CPUMCTXCORE.eflags]
486	mov [esp + 10h + ESPOFF], eax ; eflags
487	mov eax, [esp + CPUMCTXCORE.eip]
488	mov [esp + 08h + ESPOFF], eax ; eip
489
490	; finally restore our scratch register eax
491	mov eax, [esp + CPUMCTXCORE.eax]
492
493	add esp, ESPOFF + 8 ; skip CPUMCTXCORE structure, error code and vector number
494
495	TRPM_NP_GP_HANDLER NAME(trpmGCTrapInGeneric), TRPM_TRAP_IN_IRET
496	iret
497
498	ALIGNCODE(16)
499	gt_V86Return:
500	mov ecx, [esp + CPUMCTXCORE.ecx]
501	mov edx, [esp + CPUMCTXCORE.edx]
502	mov ebx, [esp + CPUMCTXCORE.ebx]
503	mov ebp, [esp + CPUMCTXCORE.ebp]
504	mov esi, [esp + CPUMCTXCORE.esi]
505	mov edi, [esp + CPUMCTXCORE.edi]
506
507	mov eax, [esp + CPUMCTXCORE.esp]
508	mov [esp + 14h + ESPOFF], eax ; esp
509	mov eax, dword [esp + CPUMCTXCORE.ss]
510	mov [esp + 18h + ESPOFF], eax ; ss
511
512	mov eax, dword [esp + CPUMCTXCORE.es]
513	mov [esp + 1ch + ESPOFF], eax ; es
514	mov eax, dword [esp + CPUMCTXCORE.ds]
515	mov [esp + 20h + ESPOFF], eax ; ds
516	mov eax, dword [esp + CPUMCTXCORE.fs]
517	mov [esp + 24h + ESPOFF], eax ; fs
518	mov eax, dword [esp + CPUMCTXCORE.gs]
519	mov [esp + 28h + ESPOFF], eax ; gs
520
521	mov eax, [esp + CPUMCTXCORE.eip]
522	mov [esp + 08h + ESPOFF], eax ; eip
523	mov eax, dword [esp + CPUMCTXCORE.cs]
524	mov [esp + 0ch + ESPOFF], eax ; cs
525	mov eax, [esp + CPUMCTXCORE.eflags]
526	mov [esp + 10h + ESPOFF], eax ; eflags
527
528	; finally restore our scratch register eax
529	mov eax, [esp + CPUMCTXCORE.eax]
530
531	add esp, ESPOFF + 8 ; skip CPUMCTXCORE structure, error code and vector number
532
533	TRPM_NP_GP_HANDLER NAME(trpmGCTrapInGeneric), TRPM_TRAP_IN_IRET \| TRPM_TRAP_IN_V86
534	iret
535
536	;
537	; Trap in Hypervisor, try to handle it.
538	;
539	; (eax = pTRPM)
540	;
541	ALIGNCODE(16)
542	gt_InHypervisor:
543	; fix ss:esp.
544	lea ebx, [esp + 14h + ESPOFF] ; calc esp at trap
545	mov [esp + CPUMCTXCORE.esp], ebx; update esp in register frame
546	mov [esp + CPUMCTXCORE.ss], ss ; update ss in register frame
547
548	; tell cpum about the context core.
549	xchg esi, eax ; save pTRPM - @todo reallocate this variable to esi, edi, or ebx
550	push esp ; Param 2 - The new CPUMCTXCORE pointer.
551	push IMP(g_VM) ; Param 1 - Pointer to the VM.
552	call NAME(CPUMHyperSetCtxCore)
553	add esp, byte 8 ; stack cleanup (cdecl)
554	xchg eax, esi ; restore pTRPM
555
556	; check for temporary handler.
557	movzx ebx, byte [eax + TRPM.uActiveVector]
558	xor ecx, ecx
559	xchg ecx, [eax + TRPM.aTmpTrapHandlers + ebx * 4] ; ecx = Temp handler pointer or 0
560	or ecx, ecx
561	jnz short gt_Hyper_HaveTemporaryHandler
562
563	; check for static trap handler.
564	mov ecx, [g_apfnStaticTrapHandlersHyper + ebx * 4] ; ecx = Static handler pointer or 0
565	or ecx, ecx
566	jnz short gt_Hyper_HaveStaticHandler
567	jmp gt_Hyper_AbandonShip
568
569
570	;
571	; Temporary trap handler present, call it (CDECL).
572	;
573	gt_Hyper_HaveTemporaryHandler:
574	push esp ; Param 2 - Pointer to CPUMCTXCORE.
575	push IMP(g_VM) ; Param 1 - Pointer to VM.
576	call ecx
577	add esp, byte 8 ; cleanup stack (cdecl)
578
579	cmp eax, byte VINF_SUCCESS ; If completely handled Then resume execution.
580	je near gt_Hyper_Continue
581	;; @todo Handle ALL returns types from temporary handlers!
582	jmp gt_Hyper_AbandonShip
583
584
585	;
586	; Static trap handler present, call it (CDECL).
587	;
588	gt_Hyper_HaveStaticHandler:
589	push esp ; Param 2 - Pointer to CPUMCTXCORE.
590	push eax ; Param 1 - Pointer to TRPM
591	call ecx
592	add esp, byte 8 ; cleanup stack (cdecl)
593
594	cmp eax, byte VINF_SUCCESS ; If completely handled Then resume execution.
595	je short gt_Hyper_Continue
596	cmp eax, VINF_EM_DBG_HYPER_STEPPED
597	je short gt_Hyper_ToHost
598	cmp eax, VINF_EM_DBG_HYPER_BREAKPOINT
599	je short gt_Hyper_ToHost
600	cmp eax, VINF_EM_DBG_HYPER_ASSERTION
601	je short gt_Hyper_ToHost
602	jmp gt_Hyper_AbandonShip
603
604	;
605	; Pop back to the host to service the error.
606	;
607	gt_Hyper_ToHost:
608	mov ecx, esp
609	mov edx, IMP(g_VM)
610	call [edx + VM.pfnVMMGCGuestToHostAsm]
611	jmp short gt_Hyper_Continue
612
613	;
614	; Continue(/Resume/Restart/Whatever) hypervisor execution.
615	; Don't reset the TRPM state. Caller takes care of that.
616	;
617	ALIGNCODE(16)
618	gt_Hyper_Continue:
619	%ifdef DEBUG_STUFF
620	mov ebx, [esp + 4h + ESPOFF] ; error code
621	mov ecx, 'resH' ; indicate trap.
622	mov edx, [esp + 0h + ESPOFF] ; vector number
623	lea eax, [esp]
624	call trpmDbgDumpRegisterFrame
625	%endif
626	; tell CPUM to use the default CPUMCTXCORE.
627	push byte 0 ; Param 2 - NULL indicating use default context core.
628	push IMP(g_VM) ; Param 1 - The VM pointer.
629	call NAME(CPUMHyperSetCtxCore)
630	add esp, byte 8 ; stack cleanup (cdecl)
631
632	%ifdef VBOX_WITH_STATISTICS
633	mov edx, [esp + 0h + ESPOFF] ; vector number
634	imul edx, edx, byte STAMPROFILEADV_size ; assumes < 128
635	add edx, TRPM.aStatGCTraps
636	add edx, IMP(g_TRPM)
637	STAM_PROFILE_ADV_STOP edx
638	%endif
639
640	; restore
641	mov ecx, [esp + CPUMCTXCORE.ecx]
642	mov edx, [esp + CPUMCTXCORE.edx]
643	mov ebx, [esp + CPUMCTXCORE.ebx]
644	mov ebp, [esp + CPUMCTXCORE.ebp]
645	mov esi, [esp + CPUMCTXCORE.esi]
646	mov edi, [esp + CPUMCTXCORE.edi]
647
648	mov eax, dword [esp + CPUMCTXCORE.gs]
649	TRPM_NP_GP_HANDLER NAME(trpmGCTrapInGeneric), TRPM_TRAP_IN_MOV_GS \| TRPM_TRAP_IN_HYPER
650	mov gs, eax
651
652	mov eax, dword [esp + CPUMCTXCORE.fs]
653	TRPM_NP_GP_HANDLER NAME(trpmGCTrapInGeneric), TRPM_TRAP_IN_MOV_FS \| TRPM_TRAP_IN_HYPER
654	mov fs, eax
655
656	mov eax, dword [esp + CPUMCTXCORE.es]
657	mov es, eax
658	mov eax, dword [esp + CPUMCTXCORE.ds]
659	mov ds, eax
660
661	; skip esp & ss
662
663	mov eax, [esp + CPUMCTXCORE.eip]
664	mov [esp + 08h + ESPOFF], eax ; eip
665	mov eax, dword [esp + CPUMCTXCORE.cs]
666	mov [esp + 0ch + ESPOFF], eax ; cs
667	mov eax, [esp + CPUMCTXCORE.eflags]
668	mov [esp + 10h + ESPOFF], eax ; eflags
669
670	; finally restore our scratch register eax
671	mov eax, [esp + CPUMCTXCORE.eax]
672
673	add esp, ESPOFF + 8 ; skip CPUMCTXCORE structure, error code and vector number
674
675	iret
676
677
678	;
679	; ABANDON SHIP! DON'T PANIC!
680	;
681	gt_Hyper_AbandonShip:
682	%ifdef DEBUG_STUFF
683	mov ebx, [esp + 4h + ESPOFF] ; error code
684	mov ecx, 'trpH' ; indicate trap.
685	mov edx, [esp + 0h + ESPOFF] ; vector number
686	lea eax, [esp]
687	call trpmDbgDumpRegisterFrame
688	%endif
689
690	gt_Hyper_DontPanic:
691	mov ecx, esp
692	mov edx, IMP(g_VM)
693	mov eax, VERR_TRPM_DONT_PANIC
694	call [edx + VM.pfnVMMGCGuestToHostAsmHyperCtx]
695	%ifdef DEBUG_STUFF
696	COM_S_PRINT 'bad!!!'
697	%endif
698	jmp gt_Hyper_DontPanic ; this shall never ever happen!
699	%undef ESPOFF
700	ENDPROC TRPMGCHandlerGeneric
701
702
703
704
705
706	;;
707	; We start by 256 push <vector no.> + jmp interruptworker
708	;
709	ALIGNCODE(16)
710	BEGINPROC_EXPORTED TRPMGCHandlerInterupt
711	; NASM has some nice features, here an example of a loop.
712	%assign i 0
713	%rep 256
714	db 06ah, i ; push imm8 - note that this is a signextended value.
715	jmp ti_GenericInterrupt
716	ALIGNCODE(8)
717	%assign i i+1
718	%endrep
719
720	;;
721	; Main interrupt handler for the guest context
722	;
723	; Stack:
724	; 24 GS (V86 only)
725	; 20 FS (V86 only)
726	; 1C DS (V86 only)
727	; 18 ES (V86 only)
728	; 14 SS
729	; 10 ESP
730	; c EFLAGS
731	; 8 CS
732	; 4 EIP
733	; ESP -> 0 Vector number (only use low byte!).
734	;
735	; @uses none
736	ti_GenericInterrupt:
737	cld
738
739	;
740	; Setup CPUMCTXCORE frame
741	;
742	; ASSUMPTION: If trap in hypervisor, we assume that we can read two dword
743	; under the bottom of the stack. This is atm safe.
744	; ASSUMPTION: There is sufficient stack space.
745	; ASSUMPTION: The stack is not write protected.
746	;
747	%define ESPOFF CPUMCTXCORE_size
748
749	sub esp, CPUMCTXCORE_size
750	mov [esp + CPUMCTXCORE.eax], eax
751	mov [esp + CPUMCTXCORE.ecx], ecx
752	mov [esp + CPUMCTXCORE.edx], edx
753	mov [esp + CPUMCTXCORE.ebx], ebx
754	mov [esp + CPUMCTXCORE.esi], esi
755	mov [esp + CPUMCTXCORE.edi], edi
756	mov [esp + CPUMCTXCORE.ebp], ebp
757
758	mov eax, [esp + 04h + ESPOFF] ; eip
759	mov [esp + CPUMCTXCORE.eip], eax
760	%if GC_ARCH_BITS == 64
761	; zero out the high dword
762	mov dword [esp + CPUMCTXCORE.eip + 4], 0
763	%endif
764	mov eax, dword [esp + 08h + ESPOFF] ; cs
765	mov [esp + CPUMCTXCORE.cs], eax
766	mov eax, [esp + 0ch + ESPOFF] ; eflags
767	mov [esp + CPUMCTXCORE.eflags], eax
768
769	mov eax, [esp + 10h + ESPOFF] ; esp
770	mov [esp + CPUMCTXCORE.esp], eax
771	%if GC_ARCH_BITS == 64
772	; zero out the high dword
773	mov dword [esp + CPUMCTXCORE.esp + 4], 0
774	%endif
775	mov eax, dword [esp + 14h + ESPOFF] ; ss
776	mov [esp + CPUMCTXCORE.ss], eax
777
778	mov eax, es
779	mov dword [esp + CPUMCTXCORE.es], eax
780	mov eax, ds
781	mov dword [esp + CPUMCTXCORE.ds], eax
782	mov eax, fs
783	mov dword [esp + CPUMCTXCORE.fs], eax
784	mov eax, gs
785	mov dword [esp + CPUMCTXCORE.gs], eax
786
787	test dword [esp + CPUMCTXCORE.eflags], X86_EFL_VM
788	jz short ti_SkipV86Entry
789
790	;
791	; The DS, ES, FS and GS registers are zeroed in V86 mode and their real values are on the stack
792	;
793	mov eax, dword [esp + ESPOFF + 18h]
794	mov dword [esp + CPUMCTXCORE.es], eax
795
796	mov eax, dword [esp + ESPOFF + 1Ch]
797	mov dword [esp + CPUMCTXCORE.ds], eax
798
799	mov eax, dword [esp + ESPOFF + 20h]
800	mov dword [esp + CPUMCTXCORE.fs], eax
801
802	mov eax, dword [esp + ESPOFF + 24h]
803	mov dword [esp + CPUMCTXCORE.gs], eax
804
805	ti_SkipV86Entry:
806
807	;
808	; Disable Ring-0 WP
809	;
810	mov eax, cr0 ;; @todo try elimiate this read.
811	and eax, ~X86_CR0_WRITE_PROTECT
812	mov cr0, eax
813
814	;
815	; Load Hypervisor DS and ES (get it from the SS)
816	;
817	mov eax, ss
818	mov ds, eax
819	mov es, eax
820
821	;
822	; Store the information about the active trap/interrupt.
823	;
824	mov eax, IMP(g_TRPM)
825	movzx edx, byte [esp + 0h + ESPOFF] ; vector number
826	mov [eax + TRPM.uActiveVector], edx
827	xor edx, edx
828	mov dword [eax + TRPM.enmActiveType], TRPM_HARDWARE_INT
829	dec edx
830	mov [eax + TRPM.uActiveErrorCode], edx
831	mov [eax + TRPM.uActiveCR2], edx
832	%if GC_ARCH_BITS == 64
833	; zero out the high dword
834	mov dword [eax + TRPM.uActiveErrorCode + 4], 0
835	mov dword [eax + TRPM.uActiveCR2 + 4], 0
836	%endif
837
838	;
839	; Check if we're in Hypervisor when this happend.
840	;
841	test byte [esp + 08h + ESPOFF], 3h ; check CPL of the cs selector
842	jnz short gi_NotHyperVisor
843	jmp gi_HyperVisor
844
845	;
846	; Trap in guest code.
847	;
848	gi_NotHyperVisor:
849	and dword [esp + CPUMCTXCORE.eflags], ~010000h ; Clear RF (Resume Flag). @todo make %defines for eflags.
850	; The guest shall not see this in it's state.
851	%ifdef DEBUG_STUFF_INT
852	mov ecx, 'intG' ; indicate trap.
853	movzx edx, byte [esp + 0h + ESPOFF] ; vector number
854	lea eax, [esp]
855	call trpmDbgDumpRegisterFrame
856	%endif
857
858	;
859	; Switch back to the host and process it there.
860	;
861	mov edx, IMP(g_VM)
862	mov eax, VINF_EM_RAW_INTERRUPT
863	call [edx + VM.pfnVMMGCGuestToHostAsmGuestCtx]
864
865	;
866	; We've returned!
867	; NOTE that the stack has been changed now!
868	; there is no longer any CPUMCTXCORE around and esp points to vector number!
869	;
870	; Reset TRPM state
871	mov eax, IMP(g_TRPM)
872	xor edx, edx
873	dec edx ; edx = 0ffffffffh
874	xchg [eax + TRPM.uActiveVector], edx
875	mov [eax + TRPM.uPrevVector], edx
876
877	; Enable WP
878	mov eax, cr0 ;; @todo try elimiate this read.
879	or eax, X86_CR0_WRITE_PROTECT
880	mov cr0, eax
881	; restore guest context and continue execution.
882	lea eax, [esp + 8]
883	push eax
884	call NAME(CPUMGCRestoreInt)
885	lea esp, [esp + 0ch] ; cleanup call and skip vector & error code.
886
887	iret
888
889	; -+- Entry point -+-
890	;
891	; We're in hypervisor mode which means no guest context
892	; and special care to be taken to restore the hypervisor
893	; context correctely.
894	;
895	; ATM the only place this can happen is when entering a trap handler.
896	; We make ASSUMPTIONS about this in respects to the WP CR0 bit
897	;
898	gi_HyperVisor:
899	lea eax, [esp + 14h + ESPOFF] ; calc esp at trap
900	mov [esp + CPUMCTXCORE.esp], eax ; update esp in register frame
901	mov [esp + CPUMCTXCORE.ss], ss ; update ss in register frame
902
903	%ifdef DEBUG_STUFF_INT
904	mov ebx, [esp + 4h + ESPOFF] ; error code
905	mov ecx, 'intH' ; indicate hypervisor interrupt.
906	movzx edx, byte [esp + 0h + ESPOFF] ; vector number
907	lea eax, [esp]
908	call trpmDbgDumpRegisterFrame
909	%endif
910
911	mov ecx, esp
912	mov edx, IMP(g_VM)
913	mov eax, VINF_EM_RAW_INTERRUPT_HYPER
914	call [edx + VM.pfnVMMGCGuestToHostAsm]
915	%ifdef DEBUG_STUFF_INT
916	COM_CHAR '!'
917	%endif
918
919	;
920	; We've returned!
921	;
922	; Reset TRPM state - don't record this.
923	mov eax, IMP(g_TRPM)
924	mov dword [eax + TRPM.uActiveVector], 0ffffffffh
925
926	;
927	; Restore the hypervisor context and return.
928	;
929	mov ecx, [esp + CPUMCTXCORE.ecx]
930	mov edx, [esp + CPUMCTXCORE.edx]
931	mov ebx, [esp + CPUMCTXCORE.ebx]
932	mov ebp, [esp + CPUMCTXCORE.ebp]
933	mov esi, [esp + CPUMCTXCORE.esi]
934	mov edi, [esp + CPUMCTXCORE.edi]
935
936	; In V86 mode DS, ES, FS & GS are restored by the iret
937	test dword [esp + CPUMCTXCORE.eflags], X86_EFL_VM
938	jnz short ti_SkipSelRegs
939
940	mov eax, [esp + CPUMCTXCORE.gs]
941	TRPM_NP_GP_HANDLER NAME(trpmGCTrapInGeneric), TRPM_TRAP_IN_MOV_GS \| TRPM_TRAP_IN_HYPER
942	mov gs, eax
943
944	mov eax, [esp + CPUMCTXCORE.fs]
945	TRPM_NP_GP_HANDLER NAME(trpmGCTrapInGeneric), TRPM_TRAP_IN_MOV_FS \| TRPM_TRAP_IN_HYPER
946	mov fs, eax
947
948	mov eax, [esp + CPUMCTXCORE.es]
949	mov es, eax
950	mov eax, [esp + CPUMCTXCORE.ds]
951	mov ds, eax
952
953	ti_SkipSelRegs:
954	; finally restore our scratch register eax
955	mov eax, [esp + CPUMCTXCORE.eax]
956
957	; skip esp, ss, cs, eip & eflags. Done by iret
958
959	add esp, ESPOFF + 4h ; skip CPUMCTXCORE structure & vector number.
960
961	iret
962	%undef ESPOFF
963	ENDPROC TRPMGCHandlerInterupt
964
965
966
967	;;
968	; Trap handler for #MC
969	;
970	; This handler will forward the #MC to the host OS. Since this
971	; is generalized in the generic interrupt handler, we just disable
972	; interrupts and push vector number and jump to the generic code.
973	;
974	; Stack:
975	; 10 SS (only if ring transition.)
976	; c ESP (only if ring transition.)
977	; 8 EFLAGS
978	; 4 CS
979	; 0 EIP
980	;
981	; @uses none
982	;
983	ALIGNCODE(16)
984	BEGINPROC_EXPORTED TRPMGCHandlerTrap12
985	push byte 12h
986	jmp ti_GenericInterrupt
987	ENDPROC TRPMGCHandlerTrap12
988
989
990
991
992	;;
993	; Trap handler for double fault (#DF).
994	;
995	; This is a special trap handler executes in separate task with own TSS, with
996	; one of the intermediate memory contexts instead of the shadow context.
997	; The handler will unconditionally print an report to the comport configured
998	; for the COM_S_* macros before attempting to return to the host. If it it ends
999	; up double faulting more than 10 times, it will simply cause an tripple fault
1000	; to get us out of the mess.
1001	;
1002	; @param esp Half way down the hypvervisor stack + the trap frame.
1003	; @param ebp Half way down the hypvervisor stack.
1004	; @param eflags Interrupts disabled, nested flag is probably set (we don't care).
1005	; @param ecx The address of the hypervisor TSS.
1006	; @param edi Same as ecx.
1007	; @param eax Same as ecx.
1008	; @param edx Address of the VM structure.
1009	; @param esi Same as edx.
1010	; @param ebx Same as edx.
1011	; @param ss Hypervisor DS.
1012	; @param ds Hypervisor DS.
1013	; @param es Hypervisor DS.
1014	; @param fs 0
1015	; @param gs 0
1016	;
1017	;
1018	; @remark To be able to catch errors with WP turned off, it is required that the
1019	; TSS GDT descriptor and the TSSes are writable (X86_PTE_RW). See SELM.cpp
1020	; for how to enable this.
1021	;
1022	; @remark It is not safe to resume the VMM after a double fault. (At least not
1023	; without clearing the busy flag of the TssTrap8 and fixing whatever cause it.)
1024	;
1025	ALIGNCODE(16)
1026	BEGINPROC_EXPORTED TRPMGCHandlerTrap08
1027	; be careful.
1028	cli
1029	cld
1030
1031	;
1032	; Load Hypervisor DS and ES (get it from the SS) - paranoia, but the TSS could be overwritten.. :)
1033	;
1034	mov eax, ss
1035	mov ds, eax
1036	mov es, eax
1037
1038	COM_S_PRINT 10,13,'* Guru Mediation 00000008 - Double Fault! *',10,13
1039
1040	;
1041	; Disable write protection.
1042	;
1043	mov eax, cr0
1044	and eax, ~X86_CR0_WRITE_PROTECT
1045	mov cr0, eax
1046
1047
1048	COM_S_PRINT 'VM='
1049	COM_S_DWORD_REG edx
1050	COM_S_PRINT ' prevTSS='
1051	COM_S_DWORD_REG ecx
1052	COM_S_PRINT ' prevCR3='
1053	mov eax, [ecx + VBOXTSS.cr3]
1054	COM_S_DWORD_REG eax
1055	COM_S_PRINT ' prevLdtr='
1056	movzx eax, word [ecx + VBOXTSS.selLdt]
1057	COM_S_DWORD_REG eax
1058	COM_S_NEWLINE
1059
1060	;
1061	; Create CPUMCTXCORE structure.
1062	;
1063	sub esp, CPUMCTXCORE_size
1064
1065	mov eax, [ecx + VBOXTSS.eip]
1066	mov [esp + CPUMCTXCORE.eip], eax
1067	%if GC_ARCH_BITS == 64
1068	; zero out the high dword
1069	mov dword [esp + CPUMCTXCORE.eip + 4], 0
1070	%endif
1071	mov eax, [ecx + VBOXTSS.eflags]
1072	mov [esp + CPUMCTXCORE.eflags], eax
1073
1074	movzx eax, word [ecx + VBOXTSS.cs]
1075	mov dword [esp + CPUMCTXCORE.cs], eax
1076	movzx eax, word [ecx + VBOXTSS.ds]
1077	mov dword [esp + CPUMCTXCORE.ds], eax
1078	movzx eax, word [ecx + VBOXTSS.es]
1079	mov dword [esp + CPUMCTXCORE.es], eax
1080	movzx eax, word [ecx + VBOXTSS.fs]
1081	mov dword [esp + CPUMCTXCORE.fs], eax
1082	movzx eax, word [ecx + VBOXTSS.gs]
1083	mov dword [esp + CPUMCTXCORE.gs], eax
1084	movzx eax, word [ecx + VBOXTSS.ss]
1085	mov [esp + CPUMCTXCORE.ss], eax
1086	mov eax, [ecx + VBOXTSS.esp]
1087	mov [esp + CPUMCTXCORE.esp], eax
1088	%if GC_ARCH_BITS == 64
1089	; zero out the high dword
1090	mov dword [esp + CPUMCTXCORE.esp + 4], 0
1091	%endif
1092	mov eax, [ecx + VBOXTSS.ecx]
1093	mov [esp + CPUMCTXCORE.ecx], eax
1094	mov eax, [ecx + VBOXTSS.edx]
1095	mov [esp + CPUMCTXCORE.edx], eax
1096	mov eax, [ecx + VBOXTSS.ebx]
1097	mov [esp + CPUMCTXCORE.ebx], eax
1098	mov eax, [ecx + VBOXTSS.eax]
1099	mov [esp + CPUMCTXCORE.eax], eax
1100	mov eax, [ecx + VBOXTSS.ebp]
1101	mov [esp + CPUMCTXCORE.ebp], eax
1102	mov eax, [ecx + VBOXTSS.esi]
1103	mov [esp + CPUMCTXCORE.esi], eax
1104	mov eax, [ecx + VBOXTSS.edi]
1105	mov [esp + CPUMCTXCORE.edi], eax
1106
1107	;
1108	; Show regs
1109	;
1110	mov ebx, 0ffffffffh
1111	mov ecx, 'trpH' ; indicate trap.
1112	mov edx, 08h ; vector number
1113	lea eax, [esp]
1114	call trpmDbgDumpRegisterFrame
1115
1116	;
1117	; Should we try go back?
1118	;
1119	inc dword [df_Count]
1120	cmp dword [df_Count], byte 10
1121	jb df_to_host
1122	jmp df_tripple_fault
1123	df_Count: dd 0
1124
1125	;
1126	; Try return to the host.
1127	;
1128	df_to_host:
1129	COM_S_PRINT 'Trying to return to host...',10,13
1130	mov ecx, esp
1131	mov edx, IMP(g_VM)
1132	mov eax, VERR_TRPM_PANIC
1133	call [edx + VM.pfnVMMGCGuestToHostAsmHyperCtx]
1134	jmp short df_to_host
1135
1136	;
1137	; Perform a tripple fault.
1138	;
1139	df_tripple_fault:
1140	COM_S_PRINT 'Giving up - tripple faulting the machine...',10,13
1141	push byte 0
1142	push byte 0
1143	sidt [esp]
1144	mov word [esp], 0
1145	lidt [esp]
1146	xor eax, eax
1147	mov dword [eax], 0
1148	jmp df_tripple_fault
1149
1150	ENDPROC TRPMGCHandlerTrap08
1151
1152
1153
1154
1155	;;
1156	; Internal procedure used to dump registers.
1157	;
1158	; @param eax Pointer to CPUMCTXCORE.
1159	; @param edx Vector number
1160	; @param ecx 'trap' if trap, 'int' if interrupt.
1161	; @param ebx Error code if trap.
1162	;
1163	trpmDbgDumpRegisterFrame:
1164	sub esp, byte 8 ; working space for sidt/sgdt/etc
1165
1166	; Init _must_ be done on host before crashing!
1167	; push edx
1168	; push eax
1169	; COM_INIT
1170	; pop eax
1171	; pop edx
1172
1173	cmp ecx, 'trpH'
1174	je near tddrf_trpH
1175	cmp ecx, 'trpG'
1176	je near tddrf_trpG
1177	cmp ecx, 'intH'
1178	je near tddrf_intH
1179	cmp ecx, 'intG'
1180	je near tddrf_intG
1181	cmp ecx, 'resH'
1182	je near tddrf_resH
1183	COM_S_PRINT 10,13,'*** Bogus Dump Code '
1184	jmp tddrf_regs
1185
1186	%if 1 ; the verbose version
1187
1188	tddrf_intG:
1189	COM_S_PRINT 10,13,'*** Interrupt (Guest) '
1190	COM_S_DWORD_REG edx
1191	jmp tddrf_regs
1192
1193	tddrf_intH:
1194	COM_S_PRINT 10,13,'*** Interrupt (Hypervisor) '
1195	COM_S_DWORD_REG edx
1196	jmp tddrf_regs
1197
1198	tddrf_trpG:
1199	COM_S_PRINT 10,13,'*** Trap '
1200	jmp tddrf_trap_rest
1201
1202	%else ; the short version
1203
1204	tddrf_intG:
1205	COM_S_CHAR 'I'
1206	jmp tddrf_ret
1207
1208	tddrf_intH:
1209	COM_S_CHAR 'i'
1210	jmp tddrf_ret
1211
1212	tddrf_trpG:
1213	COM_S_CHAR 'T'
1214	jmp tddrf_ret
1215
1216	%endif ; the short version
1217
1218	tddrf_trpH:
1219	COM_S_PRINT 10,13,'*** Guru Meditation '
1220	jmp tddrf_trap_rest
1221
1222	tddrf_resH:
1223	COM_S_PRINT 10,13,'*** Resuming Hypervisor Trap '
1224	jmp tddrf_trap_rest
1225
1226	tddrf_trap_rest:
1227	COM_S_DWORD_REG edx
1228	COM_S_PRINT ' ErrorCode='
1229	COM_S_DWORD_REG ebx
1230	COM_S_PRINT ' cr2='
1231	mov ecx, cr2
1232	COM_S_DWORD_REG ecx
1233
1234	tddrf_regs:
1235	COM_S_PRINT ' ***',10,13,'cs:eip='
1236	movzx ecx, word [eax + CPUMCTXCORE.cs]
1237	COM_S_DWORD_REG ecx
1238	COM_S_CHAR ':'
1239	mov ecx, [eax + CPUMCTXCORE.eip]
1240	COM_S_DWORD_REG ecx
1241
1242	COM_S_PRINT ' ss:esp='
1243	movzx ecx, word [eax + CPUMCTXCORE.ss]
1244	COM_S_DWORD_REG ecx
1245	COM_S_CHAR ':'
1246	mov ecx, [eax + CPUMCTXCORE.esp]
1247	COM_S_DWORD_REG ecx
1248
1249
1250	sgdt [esp]
1251	COM_S_PRINT 10,13,' gdtr='
1252	movzx ecx, word [esp]
1253	COM_S_DWORD_REG ecx
1254	COM_S_CHAR ':'
1255	mov ecx, [esp + 2]
1256	COM_S_DWORD_REG ecx
1257
1258	sidt [esp]
1259	COM_S_PRINT ' idtr='
1260	movzx ecx, word [esp]
1261	COM_S_DWORD_REG ecx
1262	COM_S_CHAR ':'
1263	mov ecx, [esp + 2]
1264	COM_S_DWORD_REG ecx
1265
1266
1267	str [esp] ; yasm BUG! it generates sldt [esp] here! YASMCHECK!
1268	COM_S_PRINT 10,13,' tr='
1269	movzx ecx, word [esp]
1270	COM_S_DWORD_REG ecx
1271
1272	sldt [esp]
1273	COM_S_PRINT ' ldtr='
1274	movzx ecx, word [esp]
1275	COM_S_DWORD_REG ecx
1276
1277	COM_S_PRINT ' eflags='
1278	mov ecx, [eax + CPUMCTXCORE.eflags]
1279	COM_S_DWORD_REG ecx
1280
1281
1282	COM_S_PRINT 10,13,'cr0='
1283	mov ecx, cr0
1284	COM_S_DWORD_REG ecx
1285
1286	COM_S_PRINT ' cr2='
1287	mov ecx, cr2
1288	COM_S_DWORD_REG ecx
1289
1290	COM_S_PRINT ' cr3='
1291	mov ecx, cr3
1292	COM_S_DWORD_REG ecx
1293	COM_S_PRINT ' cr4='
1294	mov ecx, cr4
1295	COM_S_DWORD_REG ecx
1296
1297
1298	COM_S_PRINT 10,13,' ds='
1299	movzx ecx, word [eax + CPUMCTXCORE.ds]
1300	COM_S_DWORD_REG ecx
1301
1302	COM_S_PRINT ' es='
1303	movzx ecx, word [eax + CPUMCTXCORE.es]
1304	COM_S_DWORD_REG ecx
1305
1306	COM_S_PRINT ' fs='
1307	movzx ecx, word [eax + CPUMCTXCORE.fs]
1308	COM_S_DWORD_REG ecx
1309
1310	COM_S_PRINT ' gs='
1311	movzx ecx, word [eax + CPUMCTXCORE.gs]
1312	COM_S_DWORD_REG ecx
1313
1314
1315	COM_S_PRINT 10,13,'eax='
1316	mov ecx, [eax + CPUMCTXCORE.eax]
1317	COM_S_DWORD_REG ecx
1318
1319	COM_S_PRINT ' ebx='
1320	mov ecx, [eax + CPUMCTXCORE.ebx]
1321	COM_S_DWORD_REG ecx
1322
1323	COM_S_PRINT ' ecx='
1324	mov ecx, [eax + CPUMCTXCORE.ecx]
1325	COM_S_DWORD_REG ecx
1326
1327	COM_S_PRINT ' edx='
1328	mov ecx, [eax + CPUMCTXCORE.edx]
1329	COM_S_DWORD_REG ecx
1330
1331
1332	COM_S_PRINT 10,13,'esi='
1333	mov ecx, [eax + CPUMCTXCORE.esi]
1334	COM_S_DWORD_REG ecx
1335
1336	COM_S_PRINT ' edi='
1337	mov ecx, [eax + CPUMCTXCORE.edi]
1338	COM_S_DWORD_REG ecx
1339
1340	COM_S_PRINT ' ebp='
1341	mov ecx, [eax + CPUMCTXCORE.ebp]
1342	COM_S_DWORD_REG ecx
1343
1344
1345	COM_S_NEWLINE
1346
1347	tddrf_ret:
1348	add esp, byte 8
1349	ret
1350

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source: vbox/trunk/src/VBox/VMM/VMMGC/TRPMGCHandlersA.asm@ 11347

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