TRPM.cpp@ 45530

Last change on this file since 45530 was 45528, checked in by vboxsync, 11 years ago
VBOX_WITH_RAW_MODE changes.
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Line
1	/* $Id: TRPM.cpp 45528 2013-04-12 17:32:57Z vboxsync $ */
2	/** @file
3	* TRPM - The Trap Monitor.
4	*/
5
6	/*
7	* Copyright (C) 2006-2013 Oracle Corporation
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
18	/** @page pg_trpm TRPM - The Trap Monitor
19	*
20	* The Trap Monitor (TRPM) is responsible for all trap and interrupt handling in
21	* the VMM. It plays a major role in raw-mode execution and a lesser one in the
22	* hardware assisted mode.
23	*
24	* Note first, the following will use trap as a collective term for faults,
25	* aborts and traps.
26	*
27	* @see grp_trpm
28	*
29	*
30	* @section sec_trpm_rc Raw-Mode Context
31	*
32	* When executing in the raw-mode context, TRPM will be managing the IDT and
33	* processing all traps and interrupts. It will also monitor the guest IDT
34	* because CSAM wishes to know about changes to it (trap/interrupt/syscall
35	* handler patching) and TRPM needs to keep the \#BP gate in sync (ring-3
36	* considerations). See TRPMR3SyncIDT and CSAMR3CheckGates.
37	*
38	* External interrupts will be forwarded to the host context by the quickest
39	* possible route where they will be reasserted. The other events will be
40	* categorized into virtualization traps, genuine guest traps and hypervisor
41	* traps. The latter group may be recoverable depending on when they happen and
42	* whether there is a handler for it, otherwise it will cause a guru meditation.
43	*
44	* TRPM distinguishes the between the first two (virt and guest traps) and the
45	* latter (hyper) by checking the CPL of the trapping code, if CPL == 0 then
46	* it's a hyper trap otherwise it's a virt/guest trap. There are three trap
47	* dispatcher tables, one ad-hoc for one time traps registered via
48	* TRPMGCSetTempHandler(), one for hyper traps and one for virt/guest traps.
49	* The latter two live in TRPMGCHandlersA.asm, the former in the VM structure.
50	*
51	* The raw-mode context trap handlers found in TRPMGCHandlers.cpp (for the most
52	* part), will call up the other VMM sub-systems depending on what it things
53	* happens. The two most busy traps are page faults (\#PF) and general
54	* protection fault/trap (\#GP).
55	*
56	* Before resuming guest code after having taken a virtualization trap or
57	* injected a guest trap, TRPM will check for pending forced action and
58	* every now and again let TM check for timed out timers. This allows code that
59	* is being executed as part of virtualization traps to signal ring-3 exits,
60	* page table resyncs and similar without necessarily using the status code. It
61	* also make sure we're more responsive to timers and requests from other
62	* threads (necessarily running on some different core/cpu in most cases).
63	*
64	*
65	* @section sec_trpm_all All Contexts
66	*
67	* TRPM will also dispatch / inject interrupts and traps to the guest, both when
68	* in raw-mode and when in hardware assisted mode. See TRPMInject().
69	*
70	*/
71
72	/*******************************************************************************
73	* Header Files *
74	*******************************************************************************/
75	#define LOG_GROUP LOG_GROUP_TRPM
76	#include <VBox/vmm/trpm.h>
77	#include <VBox/vmm/cpum.h>
78	#include <VBox/vmm/selm.h>
79	#include <VBox/vmm/ssm.h>
80	#include <VBox/vmm/pdmapi.h>
81	#include <VBox/vmm/em.h>
82	#include <VBox/vmm/pgm.h>
83	#include "internal/pgm.h"
84	#include <VBox/vmm/dbgf.h>
85	#include <VBox/vmm/mm.h>
86	#include <VBox/vmm/stam.h>
87	#include <VBox/vmm/csam.h>
88	#include <VBox/vmm/patm.h>
89	#include "TRPMInternal.h"
90	#include <VBox/vmm/vm.h>
91	#include <VBox/vmm/em.h>
92	#ifdef VBOX_WITH_REM
93	# include <VBox/vmm/rem.h>
94	#endif
95	#include <VBox/vmm/hm.h>
96
97	#include <VBox/err.h>
98	#include <VBox/param.h>
99	#include <VBox/log.h>
100	#include <iprt/assert.h>
101	#include <iprt/asm.h>
102	#include <iprt/string.h>
103	#include <iprt/alloc.h>
104
105
106	/*******************************************************************************
107	* Structures and Typedefs *
108	*******************************************************************************/
109	/**
110	* Trap handler function.
111	* @todo need to specialize this as we go along.
112	*/
113	typedef enum TRPMHANDLER
114	{
115	/** Generic Interrupt handler. */
116	TRPM_HANDLER_INT = 0,
117	/** Generic Trap handler. */
118	TRPM_HANDLER_TRAP,
119	/** Trap 8 (\#DF) handler. */
120	TRPM_HANDLER_TRAP_08,
121	/** Trap 12 (\#MC) handler. */
122	TRPM_HANDLER_TRAP_12,
123	/** Max. */
124	TRPM_HANDLER_MAX
125	} TRPMHANDLER, *PTRPMHANDLER;
126
127
128	/*******************************************************************************
129	* Global Variables *
130	*******************************************************************************/
131	/** Preinitialized IDT.
132	* The u16OffsetLow is a value of the TRPMHANDLER enum which TRPMR3Relocate()
133	* will use to pick the right address. The u16SegSel is always VMM CS.
134	*/
135	static VBOXIDTE_GENERIC g_aIdt[256] =
136	{
137	/* special trap handler - still, this is an interrupt gate not a trap gate... */
138	#define IDTE_TRAP(enm) { (unsigned)enm, 0, 0, VBOX_IDTE_TYPE1, VBOX_IDTE_TYPE2_INT_32, 0, 1, 0 }
139	/* generic trap handler. */
140	#define IDTE_TRAP_GEN() IDTE_TRAP(TRPM_HANDLER_TRAP)
141	/* special interrupt handler. */
142	#define IDTE_INT(enm) { (unsigned)enm, 0, 0, VBOX_IDTE_TYPE1, VBOX_IDTE_TYPE2_INT_32, 0, 1, 0 }
143	/* generic interrupt handler. */
144	#define IDTE_INT_GEN() IDTE_INT(TRPM_HANDLER_INT)
145	/* special task gate IDT entry (for critical exceptions like #DF). */
146	#define IDTE_TASK(enm) { (unsigned)enm, 0, 0, VBOX_IDTE_TYPE1, VBOX_IDTE_TYPE2_TASK, 0, 1, 0 }
147	/* draft, fixme later when the handler is written. */
148	#define IDTE_RESERVED() { 0, 0, 0, 0, 0, 0, 0, 0 }
149
150	/* N - M M - T - C - D i */
151	/* o - n o - y - o - e p */
152	/* - e n - p - d - s t */
153	/* - i - e - e - c . */
154	/* - c - - - r */
155	/* ============================================================= */
156	IDTE_TRAP_GEN(), /* 0 - #DE - F - N - Divide error */
157	IDTE_TRAP_GEN(), /* 1 - #DB - F/T - N - Single step, INT 1 instruction */
158	#ifdef VBOX_WITH_NMI
159	IDTE_TRAP_GEN(), /* 2 - - I - N - Non-Maskable Interrupt (NMI) */
160	#else
161	IDTE_INT_GEN(), /* 2 - - I - N - Non-Maskable Interrupt (NMI) */
162	#endif
163	IDTE_TRAP_GEN(), /* 3 - #BP - T - N - Breakpoint, INT 3 instruction. */
164	IDTE_TRAP_GEN(), /* 4 - #OF - T - N - Overflow, INTO instruction. */
165	IDTE_TRAP_GEN(), /* 5 - #BR - F - N - BOUND Range Exceeded, BOUND instruction. */
166	IDTE_TRAP_GEN(), /* 6 - #UD - F - N - Undefined(/Invalid) Opcode. */
167	IDTE_TRAP_GEN(), /* 7 - #NM - F - N - Device not available, FP or (F)WAIT instruction. */
168	IDTE_TASK(TRPM_HANDLER_TRAP_08), /* 8 - #DF - A - 0 - Double fault. */
169	IDTE_TRAP_GEN(), /* 9 - - F - N - Coprocessor Segment Overrun (obsolete). */
170	IDTE_TRAP_GEN(), /* a - #TS - F - Y - Invalid TSS, Taskswitch or TSS access. */
171	IDTE_TRAP_GEN(), /* b - #NP - F - Y - Segment not present. */
172	IDTE_TRAP_GEN(), /* c - #SS - F - Y - Stack-Segment fault. */
173	IDTE_TRAP_GEN(), /* d - #GP - F - Y - General protection fault. */
174	IDTE_TRAP_GEN(), /* e - #PF - F - Y - Page fault. - interrupt gate!!! */
175	IDTE_RESERVED(), /* f - - - - Intel Reserved. Do not use. */
176	IDTE_TRAP_GEN(), /* 10 - #MF - F - N - x86 FPU Floating-Point Error (Math fault), FP or (F)WAIT instruction. */
177	IDTE_TRAP_GEN(), /* 11 - #AC - F - 0 - Alignment Check. */
178	IDTE_TRAP(TRPM_HANDLER_TRAP_12), /* 12 - #MC - A - N - Machine Check. */
179	IDTE_TRAP_GEN(), /* 13 - #XF - F - N - SIMD Floating-Point Exception. */
180	IDTE_RESERVED(), /* 14 - - - - Intel Reserved. Do not use. */
181	IDTE_RESERVED(), /* 15 - - - - Intel Reserved. Do not use. */
182	IDTE_RESERVED(), /* 16 - - - - Intel Reserved. Do not use. */
183	IDTE_RESERVED(), /* 17 - - - - Intel Reserved. Do not use. */
184	IDTE_RESERVED(), /* 18 - - - - Intel Reserved. Do not use. */
185	IDTE_RESERVED(), /* 19 - - - - Intel Reserved. Do not use. */
186	IDTE_RESERVED(), /* 1a - - - - Intel Reserved. Do not use. */
187	IDTE_RESERVED(), /* 1b - - - - Intel Reserved. Do not use. */
188	IDTE_RESERVED(), /* 1c - - - - Intel Reserved. Do not use. */
189	IDTE_RESERVED(), /* 1d - - - - Intel Reserved. Do not use. */
190	IDTE_RESERVED(), /* 1e - - - - Intel Reserved. Do not use. */
191	IDTE_RESERVED(), /* 1f - - - - Intel Reserved. Do not use. */
192	IDTE_INT_GEN(), /* 20 - - I - - User defined Interrupts, external of INT n. */
193	IDTE_INT_GEN(), /* 21 - - I - - User defined Interrupts, external of INT n. */
194	IDTE_INT_GEN(), /* 22 - - I - - User defined Interrupts, external of INT n. */
195	IDTE_INT_GEN(), /* 23 - - I - - User defined Interrupts, external of INT n. */
196	IDTE_INT_GEN(), /* 24 - - I - - User defined Interrupts, external of INT n. */
197	IDTE_INT_GEN(), /* 25 - - I - - User defined Interrupts, external of INT n. */
198	IDTE_INT_GEN(), /* 26 - - I - - User defined Interrupts, external of INT n. */
199	IDTE_INT_GEN(), /* 27 - - I - - User defined Interrupts, external of INT n. */
200	IDTE_INT_GEN(), /* 28 - - I - - User defined Interrupts, external of INT n. */
201	IDTE_INT_GEN(), /* 29 - - I - - User defined Interrupts, external of INT n. */
202	IDTE_INT_GEN(), /* 2a - - I - - User defined Interrupts, external of INT n. */
203	IDTE_INT_GEN(), /* 2b - - I - - User defined Interrupts, external of INT n. */
204	IDTE_INT_GEN(), /* 2c - - I - - User defined Interrupts, external of INT n. */
205	IDTE_INT_GEN(), /* 2d - - I - - User defined Interrupts, external of INT n. */
206	IDTE_INT_GEN(), /* 2e - - I - - User defined Interrupts, external of INT n. */
207	IDTE_INT_GEN(), /* 2f - - I - - User defined Interrupts, external of INT n. */
208	IDTE_INT_GEN(), /* 30 - - I - - User defined Interrupts, external of INT n. */
209	IDTE_INT_GEN(), /* 31 - - I - - User defined Interrupts, external of INT n. */
210	IDTE_INT_GEN(), /* 32 - - I - - User defined Interrupts, external of INT n. */
211	IDTE_INT_GEN(), /* 33 - - I - - User defined Interrupts, external of INT n. */
212	IDTE_INT_GEN(), /* 34 - - I - - User defined Interrupts, external of INT n. */
213	IDTE_INT_GEN(), /* 35 - - I - - User defined Interrupts, external of INT n. */
214	IDTE_INT_GEN(), /* 36 - - I - - User defined Interrupts, external of INT n. */
215	IDTE_INT_GEN(), /* 37 - - I - - User defined Interrupts, external of INT n. */
216	IDTE_INT_GEN(), /* 38 - - I - - User defined Interrupts, external of INT n. */
217	IDTE_INT_GEN(), /* 39 - - I - - User defined Interrupts, external of INT n. */
218	IDTE_INT_GEN(), /* 3a - - I - - User defined Interrupts, external of INT n. */
219	IDTE_INT_GEN(), /* 3b - - I - - User defined Interrupts, external of INT n. */
220	IDTE_INT_GEN(), /* 3c - - I - - User defined Interrupts, external of INT n. */
221	IDTE_INT_GEN(), /* 3d - - I - - User defined Interrupts, external of INT n. */
222	IDTE_INT_GEN(), /* 3e - - I - - User defined Interrupts, external of INT n. */
223	IDTE_INT_GEN(), /* 3f - - I - - User defined Interrupts, external of INT n. */
224	IDTE_INT_GEN(), /* 40 - - I - - User defined Interrupts, external of INT n. */
225	IDTE_INT_GEN(), /* 41 - - I - - User defined Interrupts, external of INT n. */
226	IDTE_INT_GEN(), /* 42 - - I - - User defined Interrupts, external of INT n. */
227	IDTE_INT_GEN(), /* 43 - - I - - User defined Interrupts, external of INT n. */
228	IDTE_INT_GEN(), /* 44 - - I - - User defined Interrupts, external of INT n. */
229	IDTE_INT_GEN(), /* 45 - - I - - User defined Interrupts, external of INT n. */
230	IDTE_INT_GEN(), /* 46 - - I - - User defined Interrupts, external of INT n. */
231	IDTE_INT_GEN(), /* 47 - - I - - User defined Interrupts, external of INT n. */
232	IDTE_INT_GEN(), /* 48 - - I - - User defined Interrupts, external of INT n. */
233	IDTE_INT_GEN(), /* 49 - - I - - User defined Interrupts, external of INT n. */
234	IDTE_INT_GEN(), /* 4a - - I - - User defined Interrupts, external of INT n. */
235	IDTE_INT_GEN(), /* 4b - - I - - User defined Interrupts, external of INT n. */
236	IDTE_INT_GEN(), /* 4c - - I - - User defined Interrupts, external of INT n. */
237	IDTE_INT_GEN(), /* 4d - - I - - User defined Interrupts, external of INT n. */
238	IDTE_INT_GEN(), /* 4e - - I - - User defined Interrupts, external of INT n. */
239	IDTE_INT_GEN(), /* 4f - - I - - User defined Interrupts, external of INT n. */
240	IDTE_INT_GEN(), /* 50 - - I - - User defined Interrupts, external of INT n. */
241	IDTE_INT_GEN(), /* 51 - - I - - User defined Interrupts, external of INT n. */
242	IDTE_INT_GEN(), /* 52 - - I - - User defined Interrupts, external of INT n. */
243	IDTE_INT_GEN(), /* 53 - - I - - User defined Interrupts, external of INT n. */
244	IDTE_INT_GEN(), /* 54 - - I - - User defined Interrupts, external of INT n. */
245	IDTE_INT_GEN(), /* 55 - - I - - User defined Interrupts, external of INT n. */
246	IDTE_INT_GEN(), /* 56 - - I - - User defined Interrupts, external of INT n. */
247	IDTE_INT_GEN(), /* 57 - - I - - User defined Interrupts, external of INT n. */
248	IDTE_INT_GEN(), /* 58 - - I - - User defined Interrupts, external of INT n. */
249	IDTE_INT_GEN(), /* 59 - - I - - User defined Interrupts, external of INT n. */
250	IDTE_INT_GEN(), /* 5a - - I - - User defined Interrupts, external of INT n. */
251	IDTE_INT_GEN(), /* 5b - - I - - User defined Interrupts, external of INT n. */
252	IDTE_INT_GEN(), /* 5c - - I - - User defined Interrupts, external of INT n. */
253	IDTE_INT_GEN(), /* 5d - - I - - User defined Interrupts, external of INT n. */
254	IDTE_INT_GEN(), /* 5e - - I - - User defined Interrupts, external of INT n. */
255	IDTE_INT_GEN(), /* 5f - - I - - User defined Interrupts, external of INT n. */
256	IDTE_INT_GEN(), /* 60 - - I - - User defined Interrupts, external of INT n. */
257	IDTE_INT_GEN(), /* 61 - - I - - User defined Interrupts, external of INT n. */
258	IDTE_INT_GEN(), /* 62 - - I - - User defined Interrupts, external of INT n. */
259	IDTE_INT_GEN(), /* 63 - - I - - User defined Interrupts, external of INT n. */
260	IDTE_INT_GEN(), /* 64 - - I - - User defined Interrupts, external of INT n. */
261	IDTE_INT_GEN(), /* 65 - - I - - User defined Interrupts, external of INT n. */
262	IDTE_INT_GEN(), /* 66 - - I - - User defined Interrupts, external of INT n. */
263	IDTE_INT_GEN(), /* 67 - - I - - User defined Interrupts, external of INT n. */
264	IDTE_INT_GEN(), /* 68 - - I - - User defined Interrupts, external of INT n. */
265	IDTE_INT_GEN(), /* 69 - - I - - User defined Interrupts, external of INT n. */
266	IDTE_INT_GEN(), /* 6a - - I - - User defined Interrupts, external of INT n. */
267	IDTE_INT_GEN(), /* 6b - - I - - User defined Interrupts, external of INT n. */
268	IDTE_INT_GEN(), /* 6c - - I - - User defined Interrupts, external of INT n. */
269	IDTE_INT_GEN(), /* 6d - - I - - User defined Interrupts, external of INT n. */
270	IDTE_INT_GEN(), /* 6e - - I - - User defined Interrupts, external of INT n. */
271	IDTE_INT_GEN(), /* 6f - - I - - User defined Interrupts, external of INT n. */
272	IDTE_INT_GEN(), /* 70 - - I - - User defined Interrupts, external of INT n. */
273	IDTE_INT_GEN(), /* 71 - - I - - User defined Interrupts, external of INT n. */
274	IDTE_INT_GEN(), /* 72 - - I - - User defined Interrupts, external of INT n. */
275	IDTE_INT_GEN(), /* 73 - - I - - User defined Interrupts, external of INT n. */
276	IDTE_INT_GEN(), /* 74 - - I - - User defined Interrupts, external of INT n. */
277	IDTE_INT_GEN(), /* 75 - - I - - User defined Interrupts, external of INT n. */
278	IDTE_INT_GEN(), /* 76 - - I - - User defined Interrupts, external of INT n. */
279	IDTE_INT_GEN(), /* 77 - - I - - User defined Interrupts, external of INT n. */
280	IDTE_INT_GEN(), /* 78 - - I - - User defined Interrupts, external of INT n. */
281	IDTE_INT_GEN(), /* 79 - - I - - User defined Interrupts, external of INT n. */
282	IDTE_INT_GEN(), /* 7a - - I - - User defined Interrupts, external of INT n. */
283	IDTE_INT_GEN(), /* 7b - - I - - User defined Interrupts, external of INT n. */
284	IDTE_INT_GEN(), /* 7c - - I - - User defined Interrupts, external of INT n. */
285	IDTE_INT_GEN(), /* 7d - - I - - User defined Interrupts, external of INT n. */
286	IDTE_INT_GEN(), /* 7e - - I - - User defined Interrupts, external of INT n. */
287	IDTE_INT_GEN(), /* 7f - - I - - User defined Interrupts, external of INT n. */
288	IDTE_INT_GEN(), /* 80 - - I - - User defined Interrupts, external of INT n. */
289	IDTE_INT_GEN(), /* 81 - - I - - User defined Interrupts, external of INT n. */
290	IDTE_INT_GEN(), /* 82 - - I - - User defined Interrupts, external of INT n. */
291	IDTE_INT_GEN(), /* 83 - - I - - User defined Interrupts, external of INT n. */
292	IDTE_INT_GEN(), /* 84 - - I - - User defined Interrupts, external of INT n. */
293	IDTE_INT_GEN(), /* 85 - - I - - User defined Interrupts, external of INT n. */
294	IDTE_INT_GEN(), /* 86 - - I - - User defined Interrupts, external of INT n. */
295	IDTE_INT_GEN(), /* 87 - - I - - User defined Interrupts, external of INT n. */
296	IDTE_INT_GEN(), /* 88 - - I - - User defined Interrupts, external of INT n. */
297	IDTE_INT_GEN(), /* 89 - - I - - User defined Interrupts, external of INT n. */
298	IDTE_INT_GEN(), /* 8a - - I - - User defined Interrupts, external of INT n. */
299	IDTE_INT_GEN(), /* 8b - - I - - User defined Interrupts, external of INT n. */
300	IDTE_INT_GEN(), /* 8c - - I - - User defined Interrupts, external of INT n. */
301	IDTE_INT_GEN(), /* 8d - - I - - User defined Interrupts, external of INT n. */
302	IDTE_INT_GEN(), /* 8e - - I - - User defined Interrupts, external of INT n. */
303	IDTE_INT_GEN(), /* 8f - - I - - User defined Interrupts, external of INT n. */
304	IDTE_INT_GEN(), /* 90 - - I - - User defined Interrupts, external of INT n. */
305	IDTE_INT_GEN(), /* 91 - - I - - User defined Interrupts, external of INT n. */
306	IDTE_INT_GEN(), /* 92 - - I - - User defined Interrupts, external of INT n. */
307	IDTE_INT_GEN(), /* 93 - - I - - User defined Interrupts, external of INT n. */
308	IDTE_INT_GEN(), /* 94 - - I - - User defined Interrupts, external of INT n. */
309	IDTE_INT_GEN(), /* 95 - - I - - User defined Interrupts, external of INT n. */
310	IDTE_INT_GEN(), /* 96 - - I - - User defined Interrupts, external of INT n. */
311	IDTE_INT_GEN(), /* 97 - - I - - User defined Interrupts, external of INT n. */
312	IDTE_INT_GEN(), /* 98 - - I - - User defined Interrupts, external of INT n. */
313	IDTE_INT_GEN(), /* 99 - - I - - User defined Interrupts, external of INT n. */
314	IDTE_INT_GEN(), /* 9a - - I - - User defined Interrupts, external of INT n. */
315	IDTE_INT_GEN(), /* 9b - - I - - User defined Interrupts, external of INT n. */
316	IDTE_INT_GEN(), /* 9c - - I - - User defined Interrupts, external of INT n. */
317	IDTE_INT_GEN(), /* 9d - - I - - User defined Interrupts, external of INT n. */
318	IDTE_INT_GEN(), /* 9e - - I - - User defined Interrupts, external of INT n. */
319	IDTE_INT_GEN(), /* 9f - - I - - User defined Interrupts, external of INT n. */
320	IDTE_INT_GEN(), /* a0 - - I - - User defined Interrupts, external of INT n. */
321	IDTE_INT_GEN(), /* a1 - - I - - User defined Interrupts, external of INT n. */
322	IDTE_INT_GEN(), /* a2 - - I - - User defined Interrupts, external of INT n. */
323	IDTE_INT_GEN(), /* a3 - - I - - User defined Interrupts, external of INT n. */
324	IDTE_INT_GEN(), /* a4 - - I - - User defined Interrupts, external of INT n. */
325	IDTE_INT_GEN(), /* a5 - - I - - User defined Interrupts, external of INT n. */
326	IDTE_INT_GEN(), /* a6 - - I - - User defined Interrupts, external of INT n. */
327	IDTE_INT_GEN(), /* a7 - - I - - User defined Interrupts, external of INT n. */
328	IDTE_INT_GEN(), /* a8 - - I - - User defined Interrupts, external of INT n. */
329	IDTE_INT_GEN(), /* a9 - - I - - User defined Interrupts, external of INT n. */
330	IDTE_INT_GEN(), /* aa - - I - - User defined Interrupts, external of INT n. */
331	IDTE_INT_GEN(), /* ab - - I - - User defined Interrupts, external of INT n. */
332	IDTE_INT_GEN(), /* ac - - I - - User defined Interrupts, external of INT n. */
333	IDTE_INT_GEN(), /* ad - - I - - User defined Interrupts, external of INT n. */
334	IDTE_INT_GEN(), /* ae - - I - - User defined Interrupts, external of INT n. */
335	IDTE_INT_GEN(), /* af - - I - - User defined Interrupts, external of INT n. */
336	IDTE_INT_GEN(), /* b0 - - I - - User defined Interrupts, external of INT n. */
337	IDTE_INT_GEN(), /* b1 - - I - - User defined Interrupts, external of INT n. */
338	IDTE_INT_GEN(), /* b2 - - I - - User defined Interrupts, external of INT n. */
339	IDTE_INT_GEN(), /* b3 - - I - - User defined Interrupts, external of INT n. */
340	IDTE_INT_GEN(), /* b4 - - I - - User defined Interrupts, external of INT n. */
341	IDTE_INT_GEN(), /* b5 - - I - - User defined Interrupts, external of INT n. */
342	IDTE_INT_GEN(), /* b6 - - I - - User defined Interrupts, external of INT n. */
343	IDTE_INT_GEN(), /* b7 - - I - - User defined Interrupts, external of INT n. */
344	IDTE_INT_GEN(), /* b8 - - I - - User defined Interrupts, external of INT n. */
345	IDTE_INT_GEN(), /* b9 - - I - - User defined Interrupts, external of INT n. */
346	IDTE_INT_GEN(), /* ba - - I - - User defined Interrupts, external of INT n. */
347	IDTE_INT_GEN(), /* bb - - I - - User defined Interrupts, external of INT n. */
348	IDTE_INT_GEN(), /* bc - - I - - User defined Interrupts, external of INT n. */
349	IDTE_INT_GEN(), /* bd - - I - - User defined Interrupts, external of INT n. */
350	IDTE_INT_GEN(), /* be - - I - - User defined Interrupts, external of INT n. */
351	IDTE_INT_GEN(), /* bf - - I - - User defined Interrupts, external of INT n. */
352	IDTE_INT_GEN(), /* c0 - - I - - User defined Interrupts, external of INT n. */
353	IDTE_INT_GEN(), /* c1 - - I - - User defined Interrupts, external of INT n. */
354	IDTE_INT_GEN(), /* c2 - - I - - User defined Interrupts, external of INT n. */
355	IDTE_INT_GEN(), /* c3 - - I - - User defined Interrupts, external of INT n. */
356	IDTE_INT_GEN(), /* c4 - - I - - User defined Interrupts, external of INT n. */
357	IDTE_INT_GEN(), /* c5 - - I - - User defined Interrupts, external of INT n. */
358	IDTE_INT_GEN(), /* c6 - - I - - User defined Interrupts, external of INT n. */
359	IDTE_INT_GEN(), /* c7 - - I - - User defined Interrupts, external of INT n. */
360	IDTE_INT_GEN(), /* c8 - - I - - User defined Interrupts, external of INT n. */
361	IDTE_INT_GEN(), /* c9 - - I - - User defined Interrupts, external of INT n. */
362	IDTE_INT_GEN(), /* ca - - I - - User defined Interrupts, external of INT n. */
363	IDTE_INT_GEN(), /* cb - - I - - User defined Interrupts, external of INT n. */
364	IDTE_INT_GEN(), /* cc - - I - - User defined Interrupts, external of INT n. */
365	IDTE_INT_GEN(), /* cd - - I - - User defined Interrupts, external of INT n. */
366	IDTE_INT_GEN(), /* ce - - I - - User defined Interrupts, external of INT n. */
367	IDTE_INT_GEN(), /* cf - - I - - User defined Interrupts, external of INT n. */
368	IDTE_INT_GEN(), /* d0 - - I - - User defined Interrupts, external of INT n. */
369	IDTE_INT_GEN(), /* d1 - - I - - User defined Interrupts, external of INT n. */
370	IDTE_INT_GEN(), /* d2 - - I - - User defined Interrupts, external of INT n. */
371	IDTE_INT_GEN(), /* d3 - - I - - User defined Interrupts, external of INT n. */
372	IDTE_INT_GEN(), /* d4 - - I - - User defined Interrupts, external of INT n. */
373	IDTE_INT_GEN(), /* d5 - - I - - User defined Interrupts, external of INT n. */
374	IDTE_INT_GEN(), /* d6 - - I - - User defined Interrupts, external of INT n. */
375	IDTE_INT_GEN(), /* d7 - - I - - User defined Interrupts, external of INT n. */
376	IDTE_INT_GEN(), /* d8 - - I - - User defined Interrupts, external of INT n. */
377	IDTE_INT_GEN(), /* d9 - - I - - User defined Interrupts, external of INT n. */
378	IDTE_INT_GEN(), /* da - - I - - User defined Interrupts, external of INT n. */
379	IDTE_INT_GEN(), /* db - - I - - User defined Interrupts, external of INT n. */
380	IDTE_INT_GEN(), /* dc - - I - - User defined Interrupts, external of INT n. */
381	IDTE_INT_GEN(), /* dd - - I - - User defined Interrupts, external of INT n. */
382	IDTE_INT_GEN(), /* de - - I - - User defined Interrupts, external of INT n. */
383	IDTE_INT_GEN(), /* df - - I - - User defined Interrupts, external of INT n. */
384	IDTE_INT_GEN(), /* e0 - - I - - User defined Interrupts, external of INT n. */
385	IDTE_INT_GEN(), /* e1 - - I - - User defined Interrupts, external of INT n. */
386	IDTE_INT_GEN(), /* e2 - - I - - User defined Interrupts, external of INT n. */
387	IDTE_INT_GEN(), /* e3 - - I - - User defined Interrupts, external of INT n. */
388	IDTE_INT_GEN(), /* e4 - - I - - User defined Interrupts, external of INT n. */
389	IDTE_INT_GEN(), /* e5 - - I - - User defined Interrupts, external of INT n. */
390	IDTE_INT_GEN(), /* e6 - - I - - User defined Interrupts, external of INT n. */
391	IDTE_INT_GEN(), /* e7 - - I - - User defined Interrupts, external of INT n. */
392	IDTE_INT_GEN(), /* e8 - - I - - User defined Interrupts, external of INT n. */
393	IDTE_INT_GEN(), /* e9 - - I - - User defined Interrupts, external of INT n. */
394	IDTE_INT_GEN(), /* ea - - I - - User defined Interrupts, external of INT n. */
395	IDTE_INT_GEN(), /* eb - - I - - User defined Interrupts, external of INT n. */
396	IDTE_INT_GEN(), /* ec - - I - - User defined Interrupts, external of INT n. */
397	IDTE_INT_GEN(), /* ed - - I - - User defined Interrupts, external of INT n. */
398	IDTE_INT_GEN(), /* ee - - I - - User defined Interrupts, external of INT n. */
399	IDTE_INT_GEN(), /* ef - - I - - User defined Interrupts, external of INT n. */
400	IDTE_INT_GEN(), /* f0 - - I - - User defined Interrupts, external of INT n. */
401	IDTE_INT_GEN(), /* f1 - - I - - User defined Interrupts, external of INT n. */
402	IDTE_INT_GEN(), /* f2 - - I - - User defined Interrupts, external of INT n. */
403	IDTE_INT_GEN(), /* f3 - - I - - User defined Interrupts, external of INT n. */
404	IDTE_INT_GEN(), /* f4 - - I - - User defined Interrupts, external of INT n. */
405	IDTE_INT_GEN(), /* f5 - - I - - User defined Interrupts, external of INT n. */
406	IDTE_INT_GEN(), /* f6 - - I - - User defined Interrupts, external of INT n. */
407	IDTE_INT_GEN(), /* f7 - - I - - User defined Interrupts, external of INT n. */
408	IDTE_INT_GEN(), /* f8 - - I - - User defined Interrupts, external of INT n. */
409	IDTE_INT_GEN(), /* f9 - - I - - User defined Interrupts, external of INT n. */
410	IDTE_INT_GEN(), /* fa - - I - - User defined Interrupts, external of INT n. */
411	IDTE_INT_GEN(), /* fb - - I - - User defined Interrupts, external of INT n. */
412	IDTE_INT_GEN(), /* fc - - I - - User defined Interrupts, external of INT n. */
413	IDTE_INT_GEN(), /* fd - - I - - User defined Interrupts, external of INT n. */
414	IDTE_INT_GEN(), /* fe - - I - - User defined Interrupts, external of INT n. */
415	IDTE_INT_GEN(), /* ff - - I - - User defined Interrupts, external of INT n. */
416	#undef IDTE_TRAP
417	#undef IDTE_TRAP_GEN
418	#undef IDTE_INT
419	#undef IDTE_INT_GEN
420	#undef IDTE_TASK
421	#undef IDTE_UNUSED
422	#undef IDTE_RESERVED
423	};
424
425
426	/** Enable or disable tracking of Guest's IDT. */
427	#define TRPM_TRACK_GUEST_IDT_CHANGES
428
429	/** Enable or disable tracking of Shadow IDT. */
430	#define TRPM_TRACK_SHADOW_IDT_CHANGES
431
432	/** TRPM saved state version. */
433	#define TRPM_SAVED_STATE_VERSION 9
434	#define TRPM_SAVED_STATE_VERSION_UNI 8 /* SMP support bumped the version */
435
436
437	/*******************************************************************************
438	* Internal Functions *
439	*******************************************************************************/
440	static DECLCALLBACK(int) trpmR3Save(PVM pVM, PSSMHANDLE pSSM);
441	static DECLCALLBACK(int) trpmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass);
442	static DECLCALLBACK(int) trpmR3GuestIDTWriteHandler(PVM pVM, RTGCPTR GCPtr, void pvPtr, void pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser);
443
444
445	/**
446	* Initializes the Trap Manager
447	*
448	* @returns VBox status code.
449	* @param pVM Pointer to the VM.
450	*/
451	VMMR3DECL(int) TRPMR3Init(PVM pVM)
452	{
453	LogFlow(("TRPMR3Init\n"));
454
455	/*
456	* Assert sizes and alignments.
457	*/
458	AssertRelease(!(RT_OFFSETOF(VM, trpm.s) & 31));
459	AssertRelease(!(RT_OFFSETOF(VM, trpm.s.aIdt) & 15));
460	AssertRelease(sizeof(pVM->trpm.s) <= sizeof(pVM->trpm.padding));
461	AssertRelease(RT_ELEMENTS(pVM->trpm.s.aGuestTrapHandler) == sizeof(pVM->trpm.s.au32IdtPatched)*8);
462
463	/*
464	* Initialize members.
465	*/
466	pVM->trpm.s.offVM = RT_OFFSETOF(VM, trpm);
467	pVM->trpm.s.offTRPMCPU = RT_OFFSETOF(VM, aCpus[0].trpm) - RT_OFFSETOF(VM, trpm);
468
469	for (VMCPUID i = 0; i < pVM->cCpus; i++)
470	{
471	PVMCPU pVCpu = &pVM->aCpus[i];
472
473	pVCpu->trpm.s.offVM = RT_OFFSETOF(VM, aCpus[i].trpm);
474	pVCpu->trpm.s.offVMCpu = RT_OFFSETOF(VMCPU, trpm);
475	pVCpu->trpm.s.uActiveVector = ~0;
476	}
477
478	pVM->trpm.s.GuestIdtr.pIdt = RTRCPTR_MAX;
479	pVM->trpm.s.pvMonShwIdtRC = RTRCPTR_MAX;
480	pVM->trpm.s.fDisableMonitoring = false;
481	pVM->trpm.s.fSafeToDropGuestIDTMonitoring = false;
482
483	/*
484	* Read the configuration (if any).
485	*/
486	PCFGMNODE pTRPMNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "TRPM");
487	if (pTRPMNode)
488	{
489	bool f;
490	int rc = CFGMR3QueryBool(pTRPMNode, "SafeToDropGuestIDTMonitoring", &f);
491	if (RT_SUCCESS(rc))
492	pVM->trpm.s.fSafeToDropGuestIDTMonitoring = f;
493	}
494
495	/* write config summary to log */
496	if (pVM->trpm.s.fSafeToDropGuestIDTMonitoring)
497	LogRel(("TRPM: Dropping Guest IDT Monitoring.\n"));
498
499	/*
500	* Initialize the IDT.
501	* The handler addresses will be set in the TRPMR3Relocate() function.
502	*/
503	Assert(sizeof(pVM->trpm.s.aIdt) == sizeof(g_aIdt));
504	memcpy(&pVM->trpm.s.aIdt[0], &g_aIdt[0], sizeof(pVM->trpm.s.aIdt));
505
506	/*
507	* Register the saved state data unit.
508	*/
509	int rc = SSMR3RegisterInternal(pVM, "trpm", 1, TRPM_SAVED_STATE_VERSION, sizeof(TRPM),
510	NULL, NULL, NULL,
511	NULL, trpmR3Save, NULL,
512	NULL, trpmR3Load, NULL);
513	if (RT_FAILURE(rc))
514	return rc;
515
516	/*
517	* Statistics.
518	*/
519	STAM_REG(pVM, &pVM->trpm.s.StatRCWriteGuestIDTFault, STAMTYPE_COUNTER, "/TRPM/RC/IDTWritesFault", STAMUNIT_OCCURENCES, "Guest IDT writes the we returned to R3 to handle.");
520	STAM_REG(pVM, &pVM->trpm.s.StatRCWriteGuestIDTHandled, STAMTYPE_COUNTER, "/TRPM/RC/IDTWritesHandled", STAMUNIT_OCCURENCES, "Guest IDT writes that we handled successfully.");
521	STAM_REG(pVM, &pVM->trpm.s.StatSyncIDT, STAMTYPE_PROFILE, "/PROF/TRPM/SyncIDT", STAMUNIT_TICKS_PER_CALL, "Profiling of TRPMR3SyncIDT().");
522
523	/* traps */
524	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x00], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/00", STAMUNIT_TICKS_PER_CALL, "#DE - Divide error.");
525	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x01], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/01", STAMUNIT_TICKS_PER_CALL, "#DB - Debug (single step and more).");
526	//STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x02], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/02", STAMUNIT_TICKS_PER_CALL, "NMI");
527	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x03], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/03", STAMUNIT_TICKS_PER_CALL, "#BP - Breakpoint.");
528	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x04], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/04", STAMUNIT_TICKS_PER_CALL, "#OF - Overflow.");
529	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x05], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/05", STAMUNIT_TICKS_PER_CALL, "#BR - Bound range exceeded.");
530	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x06], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/06", STAMUNIT_TICKS_PER_CALL, "#UD - Undefined opcode.");
531	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x07], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/07", STAMUNIT_TICKS_PER_CALL, "#NM - Device not available (FPU).");
532	//STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x08], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/08", STAMUNIT_TICKS_PER_CALL, "#DF - Double fault.");
533	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x09], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/09", STAMUNIT_TICKS_PER_CALL, "#?? - Coprocessor segment overrun (obsolete).");
534	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0a], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0a", STAMUNIT_TICKS_PER_CALL, "#TS - Task switch fault.");
535	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0b], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0b", STAMUNIT_TICKS_PER_CALL, "#NP - Segment not present.");
536	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0c], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0c", STAMUNIT_TICKS_PER_CALL, "#SS - Stack segment fault.");
537	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0d], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0d", STAMUNIT_TICKS_PER_CALL, "#GP - General protection fault.");
538	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0e], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0e", STAMUNIT_TICKS_PER_CALL, "#PF - Page fault.");
539	//STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0f], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0f", STAMUNIT_TICKS_PER_CALL, "Reserved.");
540	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x10], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/10", STAMUNIT_TICKS_PER_CALL, "#MF - Math fault..");
541	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x11], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/11", STAMUNIT_TICKS_PER_CALL, "#AC - Alignment check.");
542	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x12], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/12", STAMUNIT_TICKS_PER_CALL, "#MC - Machine check.");
543	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x13], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/13", STAMUNIT_TICKS_PER_CALL, "#XF - SIMD Floating-Point Exception.");
544
545	#ifdef VBOX_WITH_STATISTICS
546	rc = MMHyperAlloc(pVM, sizeof(STAMCOUNTER) * 256, sizeof(STAMCOUNTER), MM_TAG_TRPM, (void **)&pVM->trpm.s.paStatForwardedIRQR3);
547	AssertRCReturn(rc, rc);
548	pVM->trpm.s.paStatForwardedIRQRC = MMHyperR3ToRC(pVM, pVM->trpm.s.paStatForwardedIRQR3);
549	pVM->trpm.s.paStatForwardedIRQR0 = MMHyperR3ToR0(pVM, pVM->trpm.s.paStatForwardedIRQR3);
550	for (unsigned i = 0; i < 256; i++)
551	STAMR3RegisterF(pVM, &pVM->trpm.s.paStatForwardedIRQR3[i], STAMTYPE_COUNTER, STAMVISIBILITY_USED, STAMUNIT_OCCURENCES, "Forwarded interrupts.",
552	i < 0x20 ? "/TRPM/ForwardRaw/TRAP/%02X" : "/TRPM/ForwardRaw/IRQ/%02X", i);
553
554	rc = MMHyperAlloc(pVM, sizeof(STAMCOUNTER) * 256, sizeof(STAMCOUNTER), MM_TAG_TRPM, (void **)&pVM->trpm.s.paStatHostIrqR3);
555	AssertRCReturn(rc, rc);
556	pVM->trpm.s.paStatHostIrqRC = MMHyperR3ToRC(pVM, pVM->trpm.s.paStatHostIrqR3);
557	pVM->trpm.s.paStatHostIrqR0 = MMHyperR3ToR0(pVM, pVM->trpm.s.paStatHostIrqR3);
558	for (unsigned i = 0; i < 256; i++)
559	STAMR3RegisterF(pVM, &pVM->trpm.s.paStatHostIrqR3[i], STAMTYPE_COUNTER, STAMVISIBILITY_USED, STAMUNIT_OCCURENCES,
560	"Host interrupts.", "/TRPM/HostIRQs/%02x", i);
561	#endif
562
563	STAM_REG(pVM, &pVM->trpm.s.StatForwardProfR3, STAMTYPE_PROFILE_ADV, "/TRPM/ForwardRaw/ProfR3", STAMUNIT_TICKS_PER_CALL, "Profiling TRPMForwardTrap.");
564	STAM_REG(pVM, &pVM->trpm.s.StatForwardProfRZ, STAMTYPE_PROFILE_ADV, "/TRPM/ForwardRaw/ProfRZ", STAMUNIT_TICKS_PER_CALL, "Profiling TRPMForwardTrap.");
565	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailNoHandler, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/FailNoHandler", STAMUNIT_OCCURENCES,"Failure to forward interrupt in raw mode.");
566	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailPatchAddr, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/FailPatchAddr", STAMUNIT_OCCURENCES,"Failure to forward interrupt in raw mode.");
567	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailR3, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/FailR3", STAMUNIT_OCCURENCES, "Failure to forward interrupt in raw mode.");
568	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailRZ, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/FailRZ", STAMUNIT_OCCURENCES, "Failure to forward interrupt in raw mode.");
569
570	STAM_REG(pVM, &pVM->trpm.s.StatTrap0dDisasm, STAMTYPE_PROFILE, "/TRPM/RC/Traps/0d/Disasm", STAMUNIT_TICKS_PER_CALL, "Profiling disassembly part of trpmGCTrap0dHandler.");
571	STAM_REG(pVM, &pVM->trpm.s.StatTrap0dRdTsc, STAMTYPE_COUNTER, "/TRPM/RC/Traps/0d/RdTsc", STAMUNIT_OCCURENCES, "Number of RDTSC #GPs.");
572
573	/*
574	* Default action when entering raw mode for the first time
575	*/
576	PVMCPU pVCpu = &pVM->aCpus[0]; /* raw mode implies on VCPU */
577	VMCPU_FF_SET(pVCpu, VMCPU_FF_TRPM_SYNC_IDT);
578	return 0;
579	}
580
581
582	/**
583	* Applies relocations to data and code managed by this component.
584	*
585	* This function will be called at init and whenever the VMM need
586	* to relocate itself inside the GC.
587	*
588	* @param pVM Pointer to the VM.
589	* @param offDelta Relocation delta relative to old location.
590	*/
591	VMMR3DECL(void) TRPMR3Relocate(PVM pVM, RTGCINTPTR offDelta)
592	{
593	/* Only applies to raw mode which supports only 1 VCPU. */
594	PVMCPU pVCpu = &pVM->aCpus[0];
595
596	LogFlow(("TRPMR3Relocate\n"));
597	/*
598	* Get the trap handler addresses.
599	*
600	* If VMMGC.gc is screwed, so are we. We'll assert here since it elsewise
601	* would make init order impossible if we should assert the presence of these
602	* exports in TRPMR3Init().
603	*/
604	RTRCPTR aRCPtrs[TRPM_HANDLER_MAX];
605	RT_ZERO(aRCPtrs);
606	int rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerInterupt", &aRCPtrs[TRPM_HANDLER_INT]);
607	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerInterupt in VMMGC.gc!\n"));
608
609	rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerGeneric", &aRCPtrs[TRPM_HANDLER_TRAP]);
610	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerGeneric in VMMGC.gc!\n"));
611
612	rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerTrap08", &aRCPtrs[TRPM_HANDLER_TRAP_08]);
613	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerTrap08 in VMMGC.gc!\n"));
614
615	rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerTrap12", &aRCPtrs[TRPM_HANDLER_TRAP_12]);
616	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerTrap12 in VMMGC.gc!\n"));
617
618	RTSEL SelCS = CPUMGetHyperCS(pVCpu);
619
620	/*
621	* Iterate the idt and set the addresses.
622	*/
623	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[0];
624	PVBOXIDTE_GENERIC pIdteTemplate = &g_aIdt[0];
625	for (unsigned i = 0; i < RT_ELEMENTS(pVM->trpm.s.aIdt); i++, pIdte++, pIdteTemplate++)
626	{
627	if ( pIdte->Gen.u1Present
628	&& !ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], i)
629	)
630	{
631	Assert(pIdteTemplate->u16OffsetLow < TRPM_HANDLER_MAX);
632	RTGCPTR Offset = aRCPtrs[pIdteTemplate->u16OffsetLow];
633	switch (pIdteTemplate->u16OffsetLow)
634	{
635	/*
636	* Generic handlers have different entrypoints for each possible
637	* vector number. These entrypoints makes a sort of an array with
638	* 8 byte entries where the vector number is the index.
639	* See TRPMGCHandlersA.asm for details.
640	*/
641	case TRPM_HANDLER_INT:
642	case TRPM_HANDLER_TRAP:
643	Offset += i * 8;
644	break;
645	case TRPM_HANDLER_TRAP_12:
646	break;
647	case TRPM_HANDLER_TRAP_08:
648	/* Handle #DF Task Gate in special way. */
649	pIdte->Gen.u16SegSel = SELMGetTrap8Selector(pVM);
650	pIdte->Gen.u16OffsetLow = 0;
651	pIdte->Gen.u16OffsetHigh = 0;
652	SELMSetTrap8EIP(pVM, Offset);
653	continue;
654	}
655	/* (non-task gates only ) */
656	pIdte->Gen.u16OffsetLow = Offset & 0xffff;
657	pIdte->Gen.u16OffsetHigh = Offset >> 16;
658	pIdte->Gen.u16SegSel = SelCS;
659	}
660	}
661
662	/*
663	* Update IDTR (limit is including!).
664	*/
665	CPUMSetHyperIDTR(pVCpu, VM_RC_ADDR(pVM, &pVM->trpm.s.aIdt[0]), sizeof(pVM->trpm.s.aIdt)-1);
666
667	if ( !pVM->trpm.s.fDisableMonitoring
668	&& !VMMIsHwVirtExtForced(pVM))
669	{
670	#ifdef TRPM_TRACK_SHADOW_IDT_CHANGES
671	if (pVM->trpm.s.pvMonShwIdtRC != RTRCPTR_MAX)
672	{
673	rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.pvMonShwIdtRC);
674	AssertRC(rc);
675	}
676	pVM->trpm.s.pvMonShwIdtRC = VM_RC_ADDR(pVM, &pVM->trpm.s.aIdt[0]);
677	rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_HYPERVISOR, pVM->trpm.s.pvMonShwIdtRC, pVM->trpm.s.pvMonShwIdtRC + sizeof(pVM->trpm.s.aIdt) - 1,
678	0, 0, "trpmRCShadowIDTWriteHandler", 0, "Shadow IDT write access handler");
679	AssertRC(rc);
680	#endif
681	}
682
683	/* Relocate IDT handlers for forwarding guest traps/interrupts. */
684	for (uint32_t iTrap = 0; iTrap < RT_ELEMENTS(pVM->trpm.s.aGuestTrapHandler); iTrap++)
685	{
686	if (pVM->trpm.s.aGuestTrapHandler[iTrap] != TRPM_INVALID_HANDLER)
687	{
688	Log(("TRPMR3Relocate: iGate=%2X Handler %RRv -> %RRv\n", iTrap, pVM->trpm.s.aGuestTrapHandler[iTrap], pVM->trpm.s.aGuestTrapHandler[iTrap] + offDelta));
689	pVM->trpm.s.aGuestTrapHandler[iTrap] += offDelta;
690	}
691
692	if (ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], iTrap))
693	{
694	PVBOXIDTE pIdteCur = &pVM->trpm.s.aIdt[iTrap];
695	RTGCPTR pHandler = VBOXIDTE_OFFSET(*pIdteCur);
696
697	Log(("TRPMR3Relocate: *iGate=%2X Handler %RGv -> %RGv\n", iTrap, pHandler, pHandler + offDelta));
698	pHandler += offDelta;
699
700	pIdteCur->Gen.u16OffsetHigh = pHandler >> 16;
701	pIdteCur->Gen.u16OffsetLow = pHandler & 0xFFFF;
702	}
703	}
704
705	#ifdef VBOX_WITH_STATISTICS
706	pVM->trpm.s.paStatForwardedIRQRC += offDelta;
707	pVM->trpm.s.paStatForwardedIRQR0 = MMHyperR3ToR0(pVM, pVM->trpm.s.paStatForwardedIRQR3);
708	pVM->trpm.s.paStatHostIrqRC += offDelta;
709	pVM->trpm.s.paStatHostIrqR0 = MMHyperR3ToR0(pVM, pVM->trpm.s.paStatHostIrqR3);
710	#endif
711	}
712
713
714	/**
715	* Terminates the Trap Manager
716	*
717	* @returns VBox status code.
718	* @param pVM Pointer to the VM.
719	*/
720	VMMR3DECL(int) TRPMR3Term(PVM pVM)
721	{
722	NOREF(pVM);
723	return 0;
724	}
725
726
727	/**
728	* Resets a virtual CPU.
729	*
730	* Used by TRPMR3Reset and CPU hot plugging.
731	*
732	* @param pVCpu Pointer to the VMCPU.
733	*/
734	VMMR3DECL(void) TRPMR3ResetCpu(PVMCPU pVCpu)
735	{
736	pVCpu->trpm.s.uActiveVector = ~0;
737	}
738
739
740	/**
741	* The VM is being reset.
742	*
743	* For the TRPM component this means that any IDT write monitors
744	* needs to be removed, any pending trap cleared, and the IDT reset.
745	*
746	* @param pVM Pointer to the VM.
747	*/
748	VMMR3DECL(void) TRPMR3Reset(PVM pVM)
749	{
750	/*
751	* Deregister any virtual handlers.
752	*/
753	#ifdef TRPM_TRACK_GUEST_IDT_CHANGES
754	if (pVM->trpm.s.GuestIdtr.pIdt != RTRCPTR_MAX)
755	{
756	if (!pVM->trpm.s.fSafeToDropGuestIDTMonitoring)
757	{
758	int rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GuestIdtr.pIdt);
759	AssertRC(rc);
760	}
761	pVM->trpm.s.GuestIdtr.pIdt = RTRCPTR_MAX;
762	}
763	pVM->trpm.s.GuestIdtr.cbIdt = 0;
764	#endif
765
766	/*
767	* Reinitialize other members calling the relocator to get things right.
768	*/
769	for (VMCPUID i = 0; i < pVM->cCpus; i++)
770	TRPMR3ResetCpu(&pVM->aCpus[i]);
771	memcpy(&pVM->trpm.s.aIdt[0], &g_aIdt[0], sizeof(pVM->trpm.s.aIdt));
772	memset(pVM->trpm.s.aGuestTrapHandler, 0, sizeof(pVM->trpm.s.aGuestTrapHandler));
773	TRPMR3Relocate(pVM, 0);
774
775	/*
776	* Default action when entering raw mode for the first time
777	*/
778	PVMCPU pVCpu = &pVM->aCpus[0]; /* raw mode implies on VCPU */
779	VMCPU_FF_SET(pVCpu, VMCPU_FF_TRPM_SYNC_IDT);
780	}
781
782
783	# ifdef VBOX_WITH_RAW_MODE
784	/**
785	* Resolve a builtin RC symbol.
786	*
787	* Called by PDM when loading or relocating RC modules.
788	*
789	* @returns VBox status
790	* @param pVM Pointer to the VM.
791	* @param pszSymbol Symbol to resolv
792	* @param pRCPtrValue Where to store the symbol value.
793	*
794	* @remark This has to work before VMMR3Relocate() is called.
795	*/
796	VMMR3_INT_DECL(int) TRPMR3GetImportRC(PVM pVM, const char *pszSymbol, PRTRCPTR pRCPtrValue)
797	{
798	if (!strcmp(pszSymbol, "g_TRPM"))
799	*pRCPtrValue = VM_RC_ADDR(pVM, &pVM->trpm);
800	else if (!strcmp(pszSymbol, "g_TRPMCPU"))
801	*pRCPtrValue = VM_RC_ADDR(pVM, &pVM->aCpus[0].trpm);
802	else if (!strcmp(pszSymbol, "g_trpmGuestCtxCore"))
803	{
804	PCPUMCTX pCtx = CPUMQueryGuestCtxPtr(VMMGetCpuById(pVM, 0));
805	*pRCPtrValue = VM_RC_ADDR(pVM, CPUMCTX2CORE(pCtx));
806	}
807	else if (!strcmp(pszSymbol, "g_trpmHyperCtxCore"))
808	{
809	PCPUMCTX pCtx = CPUMGetHyperCtxPtr(VMMGetCpuById(pVM, 0));
810	*pRCPtrValue = VM_RC_ADDR(pVM, CPUMCTX2CORE(pCtx));
811	}
812	else
813	return VERR_SYMBOL_NOT_FOUND;
814	return VINF_SUCCESS;
815	}
816	#endif /* VBOX_WITH_RAW_MODE */
817
818
819	/**
820	* Execute state save operation.
821	*
822	* @returns VBox status code.
823	* @param pVM Pointer to the VM.
824	* @param pSSM SSM operation handle.
825	*/
826	static DECLCALLBACK(int) trpmR3Save(PVM pVM, PSSMHANDLE pSSM)
827	{
828	PTRPM pTrpm = &pVM->trpm.s;
829	LogFlow(("trpmR3Save:\n"));
830
831	/*
832	* Active and saved traps.
833	*/
834	for (VMCPUID i = 0; i < pVM->cCpus; i++)
835	{
836	PTRPMCPU pTrpmCpu = &pVM->aCpus[i].trpm.s;
837	SSMR3PutUInt(pSSM, pTrpmCpu->uActiveVector);
838	SSMR3PutUInt(pSSM, pTrpmCpu->enmActiveType);
839	SSMR3PutGCUInt(pSSM, pTrpmCpu->uActiveErrorCode);
840	SSMR3PutGCUIntPtr(pSSM, pTrpmCpu->uActiveCR2);
841	SSMR3PutGCUInt(pSSM, pTrpmCpu->uSavedVector);
842	SSMR3PutUInt(pSSM, pTrpmCpu->enmSavedType);
843	SSMR3PutGCUInt(pSSM, pTrpmCpu->uSavedErrorCode);
844	SSMR3PutGCUIntPtr(pSSM, pTrpmCpu->uSavedCR2);
845	SSMR3PutGCUInt(pSSM, pTrpmCpu->uPrevVector);
846	}
847	SSMR3PutBool(pSSM, pTrpm->fDisableMonitoring);
848	PVMCPU pVCpu = &pVM->aCpus[0]; /* raw mode implies 1 VCPU */
849	SSMR3PutUInt(pSSM, VMCPU_FF_ISSET(pVCpu, VMCPU_FF_TRPM_SYNC_IDT));
850	SSMR3PutMem(pSSM, &pTrpm->au32IdtPatched[0], sizeof(pTrpm->au32IdtPatched));
851	SSMR3PutU32(pSSM, ~0); /* separator. */
852
853	/*
854	* Save any trampoline gates.
855	*/
856	for (uint32_t iTrap = 0; iTrap < RT_ELEMENTS(pTrpm->aGuestTrapHandler); iTrap++)
857	{
858	if (pTrpm->aGuestTrapHandler[iTrap])
859	{
860	SSMR3PutU32(pSSM, iTrap);
861	SSMR3PutGCPtr(pSSM, pTrpm->aGuestTrapHandler[iTrap]);
862	SSMR3PutMem(pSSM, &pTrpm->aIdt[iTrap], sizeof(pTrpm->aIdt[iTrap]));
863	}
864	}
865
866	return SSMR3PutU32(pSSM, ~0); /* terminator */
867	}
868
869
870	/**
871	* Execute state load operation.
872	*
873	* @returns VBox status code.
874	* @param pVM Pointer to the VM.
875	* @param pSSM SSM operation handle.
876	* @param uVersion Data layout version.
877	* @param uPass The data pass.
878	*/
879	static DECLCALLBACK(int) trpmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
880	{
881	LogFlow(("trpmR3Load:\n"));
882	Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
883
884	/*
885	* Validate version.
886	*/
887	if ( uVersion != TRPM_SAVED_STATE_VERSION
888	&& uVersion != TRPM_SAVED_STATE_VERSION_UNI)
889	{
890	AssertMsgFailed(("trpmR3Load: Invalid version uVersion=%d!\n", uVersion));
891	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
892	}
893
894	/*
895	* Call the reset function to kick out any handled gates and other potential trouble.
896	*/
897	TRPMR3Reset(pVM);
898
899	/*
900	* Active and saved traps.
901	*/
902	PTRPM pTrpm = &pVM->trpm.s;
903
904	if (uVersion == TRPM_SAVED_STATE_VERSION)
905	{
906	for (VMCPUID i = 0; i < pVM->cCpus; i++)
907	{
908	PTRPMCPU pTrpmCpu = &pVM->aCpus[i].trpm.s;
909	SSMR3GetUInt(pSSM, &pTrpmCpu->uActiveVector);
910	SSMR3GetUInt(pSSM, (uint32_t *)&pTrpmCpu->enmActiveType);
911	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uActiveErrorCode);
912	SSMR3GetGCUIntPtr(pSSM, &pTrpmCpu->uActiveCR2);
913	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uSavedVector);
914	SSMR3GetUInt(pSSM, (uint32_t *)&pTrpmCpu->enmSavedType);
915	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uSavedErrorCode);
916	SSMR3GetGCUIntPtr(pSSM, &pTrpmCpu->uSavedCR2);
917	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uPrevVector);
918	}
919
920	SSMR3GetBool(pSSM, &pVM->trpm.s.fDisableMonitoring);
921	}
922	else
923	{
924	PTRPMCPU pTrpmCpu = &pVM->aCpus[0].trpm.s;
925	SSMR3GetUInt(pSSM, &pTrpmCpu->uActiveVector);
926	SSMR3GetUInt(pSSM, (uint32_t *)&pTrpmCpu->enmActiveType);
927	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uActiveErrorCode);
928	SSMR3GetGCUIntPtr(pSSM, &pTrpmCpu->uActiveCR2);
929	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uSavedVector);
930	SSMR3GetUInt(pSSM, (uint32_t *)&pTrpmCpu->enmSavedType);
931	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uSavedErrorCode);
932	SSMR3GetGCUIntPtr(pSSM, &pTrpmCpu->uSavedCR2);
933	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uPrevVector);
934
935	RTGCUINT fDisableMonitoring;
936	SSMR3GetGCUInt(pSSM, &fDisableMonitoring);
937	pTrpm->fDisableMonitoring = !!fDisableMonitoring;
938	}
939
940	RTUINT fSyncIDT;
941	int rc = SSMR3GetUInt(pSSM, &fSyncIDT);
942	if (RT_FAILURE(rc))
943	return rc;
944	if (fSyncIDT & ~1)
945	{
946	AssertMsgFailed(("fSyncIDT=%#x\n", fSyncIDT));
947	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
948	}
949	if (fSyncIDT)
950	{
951	PVMCPU pVCpu = &pVM->aCpus[0]; /* raw mode implies 1 VCPU */
952	VMCPU_FF_SET(pVCpu, VMCPU_FF_TRPM_SYNC_IDT);
953	}
954	/* else: cleared by reset call above. */
955
956	SSMR3GetMem(pSSM, &pTrpm->au32IdtPatched[0], sizeof(pTrpm->au32IdtPatched));
957
958	/* check the separator */
959	uint32_t u32Sep;
960	rc = SSMR3GetU32(pSSM, &u32Sep);
961	if (RT_FAILURE(rc))
962	return rc;
963	if (u32Sep != (uint32_t)~0)
964	{
965	AssertMsgFailed(("u32Sep=%#x (first)\n", u32Sep));
966	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
967	}
968
969	/*
970	* Restore any trampoline gates.
971	*/
972	for (;;)
973	{
974	/* gate number / terminator */
975	uint32_t iTrap;
976	rc = SSMR3GetU32(pSSM, &iTrap);
977	if (RT_FAILURE(rc))
978	return rc;
979	if (iTrap == (uint32_t)~0)
980	break;
981	if ( iTrap >= RT_ELEMENTS(pTrpm->aIdt)
982	\|\| pTrpm->aGuestTrapHandler[iTrap])
983	{
984	AssertMsgFailed(("iTrap=%#x\n", iTrap));
985	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
986	}
987
988	/* restore the IDT entry. */
989	RTGCPTR GCPtrHandler;
990	SSMR3GetGCPtr(pSSM, &GCPtrHandler);
991	VBOXIDTE Idte;
992	rc = SSMR3GetMem(pSSM, &Idte, sizeof(Idte));
993	if (RT_FAILURE(rc))
994	return rc;
995	Assert(GCPtrHandler);
996	pTrpm->aIdt[iTrap] = Idte;
997	}
998
999	return VINF_SUCCESS;
1000	}
1001
1002
1003	/**
1004	* Check if gate handlers were updated
1005	* (callback for the VMCPU_FF_TRPM_SYNC_IDT forced action).
1006	*
1007	* @returns VBox status code.
1008	* @param pVM Pointer to the VM.
1009	* @param pVCpu Pointer to the VMCPU.
1010	*/
1011	VMMR3DECL(int) TRPMR3SyncIDT(PVM pVM, PVMCPU pVCpu)
1012	{
1013	STAM_PROFILE_START(&pVM->trpm.s.StatSyncIDT, a);
1014	const bool fRawRing0 = EMIsRawRing0Enabled(pVM);
1015	int rc;
1016
1017	if (pVM->trpm.s.fDisableMonitoring)
1018	{
1019	VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_TRPM_SYNC_IDT);
1020	return VINF_SUCCESS; /* Nothing to do */
1021	}
1022
1023	#ifdef VBOX_WITH_RAW_MODE
1024	if (fRawRing0 && CSAMIsEnabled(pVM))
1025	{
1026	/* Clear all handlers */
1027	Log(("TRPMR3SyncIDT: Clear all trap handlers.\n"));
1028	/** @todo inefficient, but simple */
1029	for (unsigned iGate = 0; iGate < 256; iGate++)
1030	trpmClearGuestTrapHandler(pVM, iGate);
1031
1032	/* Scan them all (only the first time) */
1033	CSAMR3CheckGates(pVM, 0, 256);
1034	}
1035	#endif /* VBOX_WITH_RAW_MODE */
1036
1037	/*
1038	* Get the IDTR.
1039	*/
1040	VBOXIDTR IDTR;
1041	IDTR.pIdt = CPUMGetGuestIDTR(pVCpu, &IDTR.cbIdt);
1042	if (!IDTR.cbIdt)
1043	{
1044	Log(("No IDT entries...\n"));
1045	return DBGFSTOP(pVM);
1046	}
1047
1048	#ifdef TRPM_TRACK_GUEST_IDT_CHANGES
1049	/*
1050	* Check if Guest's IDTR has changed.
1051	*/
1052	if ( IDTR.pIdt != pVM->trpm.s.GuestIdtr.pIdt
1053	\|\| IDTR.cbIdt != pVM->trpm.s.GuestIdtr.cbIdt)
1054	{
1055	Log(("TRPMR3UpdateFromCPUM: Guest's IDT is changed to pIdt=%08X cbIdt=%08X\n", IDTR.pIdt, IDTR.cbIdt));
1056	if (!pVM->trpm.s.fSafeToDropGuestIDTMonitoring)
1057	{
1058	/*
1059	* [Re]Register write virtual handler for guest's IDT.
1060	*/
1061	if (pVM->trpm.s.GuestIdtr.pIdt != RTRCPTR_MAX)
1062	{
1063	rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GuestIdtr.pIdt);
1064	AssertRCReturn(rc, rc);
1065	}
1066	/* limit is including */
1067	rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_WRITE, IDTR.pIdt, IDTR.pIdt + IDTR.cbIdt /* already inclusive */,
1068	0, trpmR3GuestIDTWriteHandler, "trpmRCGuestIDTWriteHandler", 0, "Guest IDT write access handler");
1069
1070	# ifdef VBOX_WITH_RAW_MODE
1071	if (rc == VERR_PGM_HANDLER_VIRTUAL_CONFLICT)
1072	{
1073	/* Could be a conflict with CSAM */
1074	CSAMR3RemovePage(pVM, IDTR.pIdt);
1075	if (PAGE_ADDRESS(IDTR.pIdt) != PAGE_ADDRESS(IDTR.pIdt + IDTR.cbIdt))
1076	CSAMR3RemovePage(pVM, IDTR.pIdt + IDTR.cbIdt);
1077
1078	rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_WRITE, IDTR.pIdt, IDTR.pIdt + IDTR.cbIdt /* already inclusive */,
1079	0, trpmR3GuestIDTWriteHandler, "trpmRCGuestIDTWriteHandler", 0, "Guest IDT write access handler");
1080	}
1081	# endif /* VBOX_WITH_RAW_MODE */
1082
1083	AssertRCReturn(rc, rc);
1084	}
1085
1086	/* Update saved Guest IDTR. */
1087	pVM->trpm.s.GuestIdtr = IDTR;
1088	}
1089	#endif
1090
1091	/*
1092	* Sync the interrupt gate.
1093	* Should probably check/sync the others too, but for now we'll handle that in #GP.
1094	*/
1095	X86DESC Idte3;
1096	rc = PGMPhysSimpleReadGCPtr(pVCpu, &Idte3, IDTR.pIdt + sizeof(Idte3) * 3, sizeof(Idte3));
1097	if (RT_FAILURE(rc))
1098	{
1099	AssertMsgRC(rc, ("Failed to read IDT[3]! rc=%Rrc\n", rc));
1100	return DBGFSTOP(pVM);
1101	}
1102	AssertRCReturn(rc, rc);
1103	if (fRawRing0)
1104	pVM->trpm.s.aIdt[3].Gen.u2DPL = RT_MAX(Idte3.Gen.u2Dpl, 1);
1105	else
1106	pVM->trpm.s.aIdt[3].Gen.u2DPL = Idte3.Gen.u2Dpl;
1107
1108	/*
1109	* Clear the FF and we're done.
1110	*/
1111	VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_TRPM_SYNC_IDT);
1112	STAM_PROFILE_STOP(&pVM->trpm.s.StatSyncIDT, a);
1113	return VINF_SUCCESS;
1114	}
1115
1116
1117	/**
1118	* Disable IDT monitoring and syncing
1119	*
1120	* @param pVM Pointer to the VM.
1121	*/
1122	VMMR3DECL(void) TRPMR3DisableMonitoring(PVM pVM)
1123	{
1124	/*
1125	* Deregister any virtual handlers.
1126	*/
1127	#ifdef TRPM_TRACK_GUEST_IDT_CHANGES
1128	if (pVM->trpm.s.GuestIdtr.pIdt != RTRCPTR_MAX)
1129	{
1130	if (!pVM->trpm.s.fSafeToDropGuestIDTMonitoring)
1131	{
1132	int rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GuestIdtr.pIdt);
1133	AssertRC(rc);
1134	}
1135	pVM->trpm.s.GuestIdtr.pIdt = RTRCPTR_MAX;
1136	}
1137	pVM->trpm.s.GuestIdtr.cbIdt = 0;
1138	#endif
1139
1140	#ifdef TRPM_TRACK_SHADOW_IDT_CHANGES
1141	if (pVM->trpm.s.pvMonShwIdtRC != RTRCPTR_MAX)
1142	{
1143	int rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.pvMonShwIdtRC);
1144	AssertRC(rc);
1145	pVM->trpm.s.pvMonShwIdtRC = RTRCPTR_MAX;
1146	}
1147	#endif
1148
1149	PVMCPU pVCpu = &pVM->aCpus[0]; /* raw mode implies on VCPU */
1150	VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_TRPM_SYNC_IDT);
1151
1152	pVM->trpm.s.fDisableMonitoring = true;
1153	}
1154
1155
1156	/**
1157	* \#PF Handler callback for virtual access handler ranges.
1158	*
1159	* Important to realize that a physical page in a range can have aliases, and
1160	* for ALL and WRITE handlers these will also trigger.
1161	*
1162	* @returns VINF_SUCCESS if the handler have carried out the operation.
1163	* @returns VINF_PGM_HANDLER_DO_DEFAULT if the caller should carry out the access operation.
1164	* @param pVM Pointer to the VM.
1165	* @param GCPtr The virtual address the guest is writing to. (not correct if it's an alias!)
1166	* @param pvPtr The HC mapping of that address.
1167	* @param pvBuf What the guest is reading/writing.
1168	* @param cbBuf How much it's reading/writing.
1169	* @param enmAccessType The access type.
1170	* @param pvUser User argument.
1171	*/
1172	static DECLCALLBACK(int) trpmR3GuestIDTWriteHandler(PVM pVM, RTGCPTR GCPtr, void pvPtr, void pvBuf, size_t cbBuf,
1173	PGMACCESSTYPE enmAccessType, void *pvUser)
1174	{
1175	Assert(enmAccessType == PGMACCESSTYPE_WRITE); NOREF(enmAccessType);
1176	Log(("trpmR3GuestIDTWriteHandler: write to %RGv size %d\n", GCPtr, cbBuf)); NOREF(GCPtr); NOREF(cbBuf);
1177	NOREF(pvPtr); NOREF(pvUser); NOREF(pvBuf);
1178
1179	VMCPU_FF_SET(VMMGetCpu(pVM), VMCPU_FF_TRPM_SYNC_IDT);
1180	return VINF_PGM_HANDLER_DO_DEFAULT;
1181	}
1182
1183	#ifdef VBOX_WITH_RAW_MODE
1184
1185	/**
1186	* Clear passthrough interrupt gate handler (reset to default handler)
1187	*
1188	* @returns VBox status code.
1189	* @param pVM Pointer to the VM.
1190	* @param iTrap Trap/interrupt gate number.
1191	*/
1192	VMMR3DECL(int) trpmR3ClearPassThroughHandler(PVM pVM, unsigned iTrap)
1193	{
1194	/* Only applies to raw mode which supports only 1 VCPU. */
1195	PVMCPU pVCpu = &pVM->aCpus[0];
1196
1197	/** @todo cleanup trpmR3ClearPassThroughHandler()! */
1198	RTRCPTR aGCPtrs[TRPM_HANDLER_MAX];
1199	int rc;
1200
1201	memset(aGCPtrs, 0, sizeof(aGCPtrs));
1202
1203	rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerInterupt", &aGCPtrs[TRPM_HANDLER_INT]);
1204	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerInterupt in VMMGC.gc!\n"));
1205
1206	if ( iTrap < TRPM_HANDLER_INT_BASE
1207	\|\| iTrap >= RT_ELEMENTS(pVM->trpm.s.aIdt))
1208	{
1209	AssertMsg(iTrap < TRPM_HANDLER_INT_BASE, ("Illegal gate number %#x!\n", iTrap));
1210	return VERR_INVALID_PARAMETER;
1211	}
1212	memcpy(&pVM->trpm.s.aIdt[iTrap], &g_aIdt[iTrap], sizeof(pVM->trpm.s.aIdt[0]));
1213
1214	/* Unmark it for relocation purposes. */
1215	ASMBitClear(&pVM->trpm.s.au32IdtPatched[0], iTrap);
1216
1217	RTSEL SelCS = CPUMGetHyperCS(pVCpu);
1218	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
1219	PVBOXIDTE_GENERIC pIdteTemplate = &g_aIdt[iTrap];
1220	if (pIdte->Gen.u1Present)
1221	{
1222	Assert(pIdteTemplate->u16OffsetLow == TRPM_HANDLER_INT);
1223	Assert(sizeof(RTRCPTR) == sizeof(aGCPtrs[0]));
1224	RTRCPTR Offset = (RTRCPTR)aGCPtrs[pIdteTemplate->u16OffsetLow];
1225
1226	/*
1227	* Generic handlers have different entrypoints for each possible
1228	* vector number. These entrypoints make a sort of an array with
1229	* 8 byte entries where the vector number is the index.
1230	* See TRPMGCHandlersA.asm for details.
1231	*/
1232	Offset += iTrap * 8;
1233
1234	if (pIdte->Gen.u5Type2 != VBOX_IDTE_TYPE2_TASK)
1235	{
1236	pIdte->Gen.u16OffsetLow = Offset & 0xffff;
1237	pIdte->Gen.u16OffsetHigh = Offset >> 16;
1238	pIdte->Gen.u16SegSel = SelCS;
1239	}
1240	}
1241
1242	return VINF_SUCCESS;
1243	}
1244
1245
1246	/**
1247	* Check if address is a gate handler (interrupt or trap).
1248	*
1249	* @returns gate nr or ~0 is not found
1250	*
1251	* @param pVM Pointer to the VM.
1252	* @param GCPtr GC address to check.
1253	*/
1254	VMMR3DECL(uint32_t) TRPMR3QueryGateByHandler(PVM pVM, RTRCPTR GCPtr)
1255	{
1256	for (uint32_t iTrap = 0; iTrap < RT_ELEMENTS(pVM->trpm.s.aGuestTrapHandler); iTrap++)
1257	{
1258	if (pVM->trpm.s.aGuestTrapHandler[iTrap] == GCPtr)
1259	return iTrap;
1260
1261	/* redundant */
1262	if (ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], iTrap))
1263	{
1264	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
1265	RTGCPTR pHandler = VBOXIDTE_OFFSET(*pIdte);
1266
1267	if (pHandler == GCPtr)
1268	return iTrap;
1269	}
1270	}
1271	return ~0;
1272	}
1273
1274
1275	/**
1276	* Get guest trap/interrupt gate handler
1277	*
1278	* @returns Guest trap handler address or TRPM_INVALID_HANDLER if none installed
1279	* @param pVM Pointer to the VM.
1280	* @param iTrap Interrupt/trap number.
1281	*/
1282	VMMR3DECL(RTRCPTR) TRPMR3GetGuestTrapHandler(PVM pVM, unsigned iTrap)
1283	{
1284	AssertReturn(iTrap < RT_ELEMENTS(pVM->trpm.s.aIdt), TRPM_INVALID_HANDLER);
1285
1286	return pVM->trpm.s.aGuestTrapHandler[iTrap];
1287	}
1288
1289
1290	/**
1291	* Set guest trap/interrupt gate handler
1292	* Used for setting up trap gates used for kernel calls.
1293	*
1294	* @returns VBox status code.
1295	* @param pVM Pointer to the VM.
1296	* @param iTrap Interrupt/trap number.
1297	* @param pHandler GC handler pointer
1298	*/
1299	VMMR3DECL(int) TRPMR3SetGuestTrapHandler(PVM pVM, unsigned iTrap, RTRCPTR pHandler)
1300	{
1301	/* Only valid in raw mode which implies 1 VCPU */
1302	Assert(PATMIsEnabled(pVM) && pVM->cCpus == 1);
1303	PVMCPU pVCpu = &pVM->aCpus[0];
1304
1305	/*
1306	* Validate.
1307	*/
1308	if (iTrap >= RT_ELEMENTS(pVM->trpm.s.aIdt))
1309	{
1310	AssertMsg(iTrap < TRPM_HANDLER_INT_BASE, ("Illegal gate number %d!\n", iTrap));
1311	return VERR_INVALID_PARAMETER;
1312	}
1313
1314	AssertReturn(pHandler == TRPM_INVALID_HANDLER \|\| PATMIsPatchGCAddr(pVM, pHandler), VERR_INVALID_PARAMETER);
1315
1316	uint16_t cbIDT;
1317	RTGCPTR GCPtrIDT = CPUMGetGuestIDTR(pVCpu, &cbIDT);
1318	if (iTrap * sizeof(VBOXIDTE) >= cbIDT)
1319	return VERR_INVALID_PARAMETER; /* Silently ignore out of range requests. */
1320
1321	if (pHandler == TRPM_INVALID_HANDLER)
1322	{
1323	/* clear trap handler */
1324	Log(("TRPMR3SetGuestTrapHandler: clear handler %x\n", iTrap));
1325	return trpmClearGuestTrapHandler(pVM, iTrap);
1326	}
1327
1328	/*
1329	* Read the guest IDT entry.
1330	*/
1331	VBOXIDTE GuestIdte;
1332	int rc = PGMPhysSimpleReadGCPtr(pVCpu, &GuestIdte, GCPtrIDT + iTrap * sizeof(GuestIdte), sizeof(GuestIdte));
1333	if (RT_FAILURE(rc))
1334	{
1335	AssertMsgRC(rc, ("Failed to read IDTE! rc=%Rrc\n", rc));
1336	return rc;
1337	}
1338
1339	if ( EMIsRawRing0Enabled(pVM)
1340	&& !EMIsRawRing1Enabled(pVM)) /* can't deal with the ambiguity of ring 1 & 2 in the patch code. */
1341	{
1342	/*
1343	* Only replace handlers for which we are 100% certain there won't be
1344	* any host interrupts.
1345	*
1346	* 0x2E is safe on Windows because it's the system service interrupt gate. Not
1347	* quite certain if this is safe or not on 64-bit Vista, it probably is.
1348	*
1349	* 0x80 is safe on Linux because it's the syscall vector and is part of the
1350	* 32-bit usermode ABI. 64-bit Linux (usually) supports 32-bit processes
1351	* and will therefor never assign hardware interrupts to 0x80.
1352	*
1353	* Exactly why 0x80 is safe on 32-bit Windows is a bit hazy, but it seems
1354	* to work ok... However on 64-bit Vista (SMP?) is doesn't work reliably.
1355	* Booting Linux/BSD guest will cause system lockups on most of the computers.
1356	* -> Update: It seems gate 0x80 is not safe on 32-bits Windows either. See
1357	* @bugref{3604}.
1358	*
1359	* PORTME - Check if your host keeps any of these gates free from hw ints.
1360	*
1361	* Note! SELMR3SyncTSS also has code related to this interrupt handler replacing.
1362	*/
1363	/** @todo handle those dependencies better! */
1364	/** @todo Solve this in a proper manner. see @bugref{1186} */
1365	#if defined(RT_OS_WINDOWS) && defined(RT_ARCH_X86)
1366	if (iTrap == 0x2E)
1367	#elif defined(RT_OS_LINUX)
1368	if (iTrap == 0x80)
1369	#else
1370	if (0)
1371	#endif
1372	{
1373	if ( GuestIdte.Gen.u1Present
1374	&& ( GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_TRAP_32
1375	\|\| GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32)
1376	&& GuestIdte.Gen.u2DPL == 3)
1377	{
1378	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
1379
1380	GuestIdte.Gen.u5Type2 = VBOX_IDTE_TYPE2_TRAP_32;
1381	GuestIdte.Gen.u16OffsetHigh = pHandler >> 16;
1382	GuestIdte.Gen.u16OffsetLow = pHandler & 0xFFFF;
1383	GuestIdte.Gen.u16SegSel \|= 1; //ring 1
1384	*pIdte = GuestIdte;
1385
1386	/* Mark it for relocation purposes. */
1387	ASMBitSet(&pVM->trpm.s.au32IdtPatched[0], iTrap);
1388
1389	/* Also store it in our guest trap array. */
1390	pVM->trpm.s.aGuestTrapHandler[iTrap] = pHandler;
1391
1392	Log(("Setting trap handler %x to %08X (direct)\n", iTrap, pHandler));
1393	return VINF_SUCCESS;
1394	}
1395	/* ok, let's try to install a trampoline handler then. */
1396	}
1397	}
1398
1399	if ( GuestIdte.Gen.u1Present
1400	&& ( GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_TRAP_32
1401	\|\| GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32)
1402	&& (GuestIdte.Gen.u2DPL == 3 \|\| GuestIdte.Gen.u2DPL == 0))
1403	{
1404	/*
1405	* Save handler which can be used for a trampoline call inside the GC
1406	*/
1407	Log(("Setting trap handler %x to %08X\n", iTrap, pHandler));
1408	pVM->trpm.s.aGuestTrapHandler[iTrap] = pHandler;
1409	return VINF_SUCCESS;
1410	}
1411	return VERR_INVALID_PARAMETER;
1412	}
1413
1414
1415	/**
1416	* Check if address is a gate handler (interrupt/trap/task/anything).
1417	*
1418	* @returns True is gate handler, false if not.
1419	*
1420	* @param pVM Pointer to the VM.
1421	* @param GCPtr GC address to check.
1422	*/
1423	VMMR3DECL(bool) TRPMR3IsGateHandler(PVM pVM, RTRCPTR GCPtr)
1424	{
1425	/* Only valid in raw mode which implies 1 VCPU */
1426	Assert(PATMIsEnabled(pVM) && pVM->cCpus == 1);
1427	PVMCPU pVCpu = &pVM->aCpus[0];
1428
1429	/*
1430	* Read IDTR and calc last entry.
1431	*/
1432	uint16_t cbIDT;
1433	RTGCPTR GCPtrIDTE = CPUMGetGuestIDTR(pVCpu, &cbIDT);
1434	unsigned cEntries = (cbIDT + 1) / sizeof(VBOXIDTE);
1435	if (!cEntries)
1436	return false;
1437	RTGCPTR GCPtrIDTELast = GCPtrIDTE + (cEntries - 1) * sizeof(VBOXIDTE);
1438
1439	/*
1440	* Outer loop: iterate pages.
1441	*/
1442	while (GCPtrIDTE <= GCPtrIDTELast)
1443	{
1444	/*
1445	* Convert this page to a HC address.
1446	* (This function checks for not-present pages.)
1447	*/
1448	PCVBOXIDTE pIDTE;
1449	PGMPAGEMAPLOCK Lock;
1450	int rc = PGMPhysGCPtr2CCPtrReadOnly(pVCpu, GCPtrIDTE, (const void **)&pIDTE, &Lock);
1451	if (RT_SUCCESS(rc))
1452	{
1453	/*
1454	* Inner Loop: Iterate the data on this page looking for an entry equal to GCPtr.
1455	* N.B. Member of the Flat Earth Society...
1456	*/
1457	while (GCPtrIDTE <= GCPtrIDTELast)
1458	{
1459	if (pIDTE->Gen.u1Present)
1460	{
1461	RTRCPTR GCPtrHandler = VBOXIDTE_OFFSET(*pIDTE);
1462	if (GCPtr == GCPtrHandler)
1463	{
1464	PGMPhysReleasePageMappingLock(pVM, &Lock);
1465	return true;
1466	}
1467	}
1468
1469	/* next entry */
1470	if ((GCPtrIDTE & PAGE_OFFSET_MASK) + sizeof(VBOXIDTE) >= PAGE_SIZE)
1471	{
1472	AssertMsg(!(GCPtrIDTE & (sizeof(VBOXIDTE) - 1)),
1473	("IDT is crossing pages and it's not aligned! GCPtrIDTE=%#x cbIDT=%#x\n", GCPtrIDTE, cbIDT));
1474	GCPtrIDTE += sizeof(VBOXIDTE);
1475	break;
1476	}
1477	GCPtrIDTE += sizeof(VBOXIDTE);
1478	pIDTE++;
1479	}
1480	PGMPhysReleasePageMappingLock(pVM, &Lock);
1481	}
1482	else
1483	{
1484	/* Skip to the next page (if any). Take care not to wrap around the address space. */
1485	if ((GCPtrIDTELast >> PAGE_SHIFT) == (GCPtrIDTE >> PAGE_SHIFT))
1486	return false;
1487	GCPtrIDTE = RT_ALIGN_T(GCPtrIDTE, PAGE_SIZE, RTGCPTR) + PAGE_SIZE + (GCPtrIDTE & (sizeof(VBOXIDTE) - 1));
1488	}
1489	}
1490	return false;
1491	}
1492
1493	#endif /* VBOX_WITH_RAW_MODE */
1494
1495	/**
1496	* Inject event (such as external irq or trap)
1497	*
1498	* @returns VBox status code.
1499	* @param pVM Pointer to the VM.
1500	* @param pVCpu Pointer to the VMCPU.
1501	* @param enmEvent Trpm event type
1502	*/
1503	VMMR3DECL(int) TRPMR3InjectEvent(PVM pVM, PVMCPU pVCpu, TRPMEVENT enmEvent)
1504	{
1505	PCPUMCTX pCtx = CPUMQueryGuestCtxPtr(pVCpu);
1506	#ifdef VBOX_WITH_RAW_MODE
1507	Assert(!PATMIsPatchGCAddr(pVM, pCtx->eip));
1508	#endif
1509	Assert(!VMCPU_FF_ISSET(pVCpu, VMCPU_FF_INHIBIT_INTERRUPTS));
1510
1511	/* Currently only useful for external hardware interrupts. */
1512	Assert(enmEvent == TRPM_HARDWARE_INT);
1513
1514	if ( !EMIsSupervisorCodeRecompiled(pVM)
1515	#ifdef VBOX_WITH_REM
1516	&& REMR3QueryPendingInterrupt(pVM, pVCpu) == REM_NO_PENDING_IRQ
1517	#endif
1518	)
1519	{
1520	#ifdef TRPM_FORWARD_TRAPS_IN_GC
1521
1522	# ifdef LOG_ENABLED
1523	DBGFR3_INFO_LOG(pVM, "cpumguest", "TRPMInject");
1524	DBGFR3_DISAS_INSTR_CUR_LOG(pVCpu, "TRPMInject");
1525	# endif
1526
1527	uint8_t u8Interrupt;
1528	int rc = PDMGetInterrupt(pVCpu, &u8Interrupt);
1529	Log(("TRPMR3InjectEvent: CPU%d u8Interrupt=%d (%#x) rc=%Rrc\n", pVCpu->idCpu, u8Interrupt, u8Interrupt, rc));
1530	if (RT_SUCCESS(rc))
1531	{
1532	# ifndef IEM_VERIFICATION_MODE
1533	if (HMIsEnabled(pVM))
1534	# endif
1535	{
1536	rc = TRPMAssertTrap(pVCpu, u8Interrupt, enmEvent);
1537	AssertRC(rc);
1538	STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1539	return HMR3IsActive(pVCpu) ? VINF_EM_RESCHEDULE_HM : VINF_EM_RESCHEDULE_REM;
1540	}
1541	/* If the guest gate is not patched, then we will check (again) if we can patch it. */
1542	if (pVM->trpm.s.aGuestTrapHandler[u8Interrupt] == TRPM_INVALID_HANDLER)
1543	{
1544	CSAMR3CheckGates(pVM, u8Interrupt, 1);
1545	Log(("TRPMR3InjectEvent: recheck gate %x -> valid=%d\n", u8Interrupt, TRPMR3GetGuestTrapHandler(pVM, u8Interrupt) != TRPM_INVALID_HANDLER));
1546	}
1547
1548	if (pVM->trpm.s.aGuestTrapHandler[u8Interrupt] != TRPM_INVALID_HANDLER)
1549	{
1550	/* Must check pending forced actions as our IDT or GDT might be out of sync */
1551	rc = EMR3CheckRawForcedActions(pVM, pVCpu);
1552	if (rc == VINF_SUCCESS)
1553	{
1554	/* There's a handler -> let's execute it in raw mode */
1555	rc = TRPMForwardTrap(pVCpu, CPUMCTX2CORE(pCtx), u8Interrupt, 0, TRPM_TRAP_NO_ERRORCODE, enmEvent, -1);
1556	if (rc == VINF_SUCCESS /* Don't use RT_SUCCESS */)
1557	{
1558	Assert(!VMCPU_FF_ISPENDING(pVCpu, VMCPU_FF_SELM_SYNC_GDT \| VMCPU_FF_SELM_SYNC_LDT \| VMCPU_FF_TRPM_SYNC_IDT \| VMCPU_FF_SELM_SYNC_TSS));
1559
1560	STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1561	return VINF_EM_RESCHEDULE_RAW;
1562	}
1563	}
1564	}
1565	else
1566	STAM_COUNTER_INC(&pVM->trpm.s.StatForwardFailNoHandler);
1567	# ifdef VBOX_WITH_REM
1568	REMR3NotifyPendingInterrupt(pVM, pVCpu, u8Interrupt);
1569	# endif
1570	}
1571	else
1572	{
1573	AssertRC(rc);
1574	return HMR3IsActive(pVCpu) ? VINF_EM_RESCHEDULE_HM : VINF_EM_RESCHEDULE_REM; /* (Heed the halted state if this is changed!) */
1575	}
1576	#else /* !TRPM_FORWARD_TRAPS_IN_GC */
1577	if (HMR3IsActive(pVCpu))
1578	{
1579	uint8_t u8Interrupt;
1580	int rc = PDMGetInterrupt(pVCpu, &u8Interrupt);
1581	Log(("TRPMR3InjectEvent: u8Interrupt=%d (%#x) rc=%Rrc\n", u8Interrupt, u8Interrupt, rc));
1582	if (RT_SUCCESS(rc))
1583	{
1584	rc = TRPMAssertTrap(pVCpu, u8Interrupt, TRPM_HARDWARE_INT);
1585	AssertRC(rc);
1586	STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1587	return VINF_EM_RESCHEDULE_HM;
1588	}
1589	}
1590	#endif /* !TRPM_FORWARD_TRAPS_IN_GC */
1591	}
1592	/** @todo check if it's safe to translate the patch address to the original guest address.
1593	* this implies a safe state in translated instructions and should take sti successors into account (instruction fusing)
1594	*/
1595	/* Note: if it's a PATM address, then we'll go back to raw mode regardless of the return code below. */
1596
1597	/* Fall back to the recompiler */
1598	return VINF_EM_RESCHEDULE_REM; /* (Heed the halted state if this is changed!) */
1599	}
1600

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source: vbox/trunk/src/VBox/VMM/VMMR3/TRPM.cpp@ 45530

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