TRPM.cpp@ 28800

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1	/* $Id: TRPM.cpp 28800 2010-04-27 08:22:32Z vboxsync $ */
2	/** @file
3	* TRPM - The Trap Monitor.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 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 disgishishes 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/trpm.h>
77	#include <VBox/cpum.h>
78	#include <VBox/selm.h>
79	#include <VBox/ssm.h>
80	#include <VBox/pdmapi.h>
81	#include <VBox/pgm.h>
82	#include <VBox/dbgf.h>
83	#include <VBox/mm.h>
84	#include <VBox/stam.h>
85	#include <VBox/csam.h>
86	#include <VBox/patm.h>
87	#include "TRPMInternal.h"
88	#include <VBox/vm.h>
89	#include <VBox/em.h>
90	#include <VBox/rem.h>
91	#include <VBox/hwaccm.h>
92
93	#include <VBox/err.h>
94	#include <VBox/param.h>
95	#include <VBox/log.h>
96	#include <iprt/assert.h>
97	#include <iprt/asm.h>
98	#include <iprt/string.h>
99	#include <iprt/alloc.h>
100
101
102	/*******************************************************************************
103	* Structures and Typedefs *
104	*******************************************************************************/
105	/**
106	* Trap handler function.
107	* @todo need to specialize this as we go along.
108	*/
109	typedef enum TRPMHANDLER
110	{
111	/** Generic Interrupt handler. */
112	TRPM_HANDLER_INT = 0,
113	/** Generic Trap handler. */
114	TRPM_HANDLER_TRAP,
115	/** Trap 8 (\#DF) handler. */
116	TRPM_HANDLER_TRAP_08,
117	/** Trap 12 (\#MC) handler. */
118	TRPM_HANDLER_TRAP_12,
119	/** Max. */
120	TRPM_HANDLER_MAX
121	} TRPMHANDLER, *PTRPMHANDLER;
122
123
124	/*******************************************************************************
125	* Global Variables *
126	*******************************************************************************/
127	/** Preinitialized IDT.
128	* The u16OffsetLow is a value of the TRPMHANDLER enum which TRPMR3Relocate()
129	* will use to pick the right address. The u16SegSel is always VMM CS.
130	*/
131	static VBOXIDTE_GENERIC g_aIdt[256] =
132	{
133	/* special trap handler - still, this is an interrupt gate not a trap gate... */
134	#define IDTE_TRAP(enm) { (unsigned)enm, 0, 0, VBOX_IDTE_TYPE1, VBOX_IDTE_TYPE2_INT_32, 0, 1, 0 }
135	/* generic trap handler. */
136	#define IDTE_TRAP_GEN() IDTE_TRAP(TRPM_HANDLER_TRAP)
137	/* special interrupt handler. */
138	#define IDTE_INT(enm) { (unsigned)enm, 0, 0, VBOX_IDTE_TYPE1, VBOX_IDTE_TYPE2_INT_32, 0, 1, 0 }
139	/* generic interrupt handler. */
140	#define IDTE_INT_GEN() IDTE_INT(TRPM_HANDLER_INT)
141	/* special task gate IDT entry (for critical exceptions like #DF). */
142	#define IDTE_TASK(enm) { (unsigned)enm, 0, 0, VBOX_IDTE_TYPE1, VBOX_IDTE_TYPE2_TASK, 0, 1, 0 }
143	/* draft, fixme later when the handler is written. */
144	#define IDTE_RESERVED() { 0, 0, 0, 0, 0, 0, 0, 0 }
145
146	/* N - M M - T - C - D i */
147	/* o - n o - y - o - e p */
148	/* - e n - p - d - s t */
149	/* - i - e - e - c . */
150	/* - c - - - r */
151	/* ============================================================= */
152	IDTE_TRAP_GEN(), /* 0 - #DE - F - N - Divide error */
153	IDTE_TRAP_GEN(), /* 1 - #DB - F/T - N - Single step, INT 1 instruction */
154	#ifdef VBOX_WITH_NMI
155	IDTE_TRAP_GEN(), /* 2 - - I - N - Non-Maskable Interrupt (NMI) */
156	#else
157	IDTE_INT_GEN(), /* 2 - - I - N - Non-Maskable Interrupt (NMI) */
158	#endif
159	IDTE_TRAP_GEN(), /* 3 - #BP - T - N - Breakpoint, INT 3 instruction. */
160	IDTE_TRAP_GEN(), /* 4 - #OF - T - N - Overflow, INTO instruction. */
161	IDTE_TRAP_GEN(), /* 5 - #BR - F - N - BOUND Range Exceeded, BOUND instruction. */
162	IDTE_TRAP_GEN(), /* 6 - #UD - F - N - Undefined(/Invalid) Opcode. */
163	IDTE_TRAP_GEN(), /* 7 - #NM - F - N - Device not available, FP or (F)WAIT instruction. */
164	IDTE_TASK(TRPM_HANDLER_TRAP_08), /* 8 - #DF - A - 0 - Double fault. */
165	IDTE_TRAP_GEN(), /* 9 - - F - N - Coprocessor Segment Overrun (obsolete). */
166	IDTE_TRAP_GEN(), /* a - #TS - F - Y - Invalid TSS, Taskswitch or TSS access. */
167	IDTE_TRAP_GEN(), /* b - #NP - F - Y - Segment not present. */
168	IDTE_TRAP_GEN(), /* c - #SS - F - Y - Stack-Segment fault. */
169	IDTE_TRAP_GEN(), /* d - #GP - F - Y - General protection fault. */
170	IDTE_TRAP_GEN(), /* e - #PF - F - Y - Page fault. - interrupt gate!!! */
171	IDTE_RESERVED(), /* f - - - - Intel Reserved. Do not use. */
172	IDTE_TRAP_GEN(), /* 10 - #MF - F - N - x86 FPU Floating-Point Error (Math fault), FP or (F)WAIT instruction. */
173	IDTE_TRAP_GEN(), /* 11 - #AC - F - 0 - Alignment Check. */
174	IDTE_TRAP(TRPM_HANDLER_TRAP_12), /* 12 - #MC - A - N - Machine Check. */
175	IDTE_TRAP_GEN(), /* 13 - #XF - F - N - SIMD Floating-Point Exception. */
176	IDTE_RESERVED(), /* 14 - - - - Intel Reserved. Do not use. */
177	IDTE_RESERVED(), /* 15 - - - - Intel Reserved. Do not use. */
178	IDTE_RESERVED(), /* 16 - - - - Intel Reserved. Do not use. */
179	IDTE_RESERVED(), /* 17 - - - - Intel Reserved. Do not use. */
180	IDTE_RESERVED(), /* 18 - - - - Intel Reserved. Do not use. */
181	IDTE_RESERVED(), /* 19 - - - - Intel Reserved. Do not use. */
182	IDTE_RESERVED(), /* 1a - - - - Intel Reserved. Do not use. */
183	IDTE_RESERVED(), /* 1b - - - - Intel Reserved. Do not use. */
184	IDTE_RESERVED(), /* 1c - - - - Intel Reserved. Do not use. */
185	IDTE_RESERVED(), /* 1d - - - - Intel Reserved. Do not use. */
186	IDTE_RESERVED(), /* 1e - - - - Intel Reserved. Do not use. */
187	IDTE_RESERVED(), /* 1f - - - - Intel Reserved. Do not use. */
188	IDTE_INT_GEN(), /* 20 - - I - - User defined Interrupts, external of INT n. */
189	IDTE_INT_GEN(), /* 21 - - I - - User defined Interrupts, external of INT n. */
190	IDTE_INT_GEN(), /* 22 - - I - - User defined Interrupts, external of INT n. */
191	IDTE_INT_GEN(), /* 23 - - I - - User defined Interrupts, external of INT n. */
192	IDTE_INT_GEN(), /* 24 - - I - - User defined Interrupts, external of INT n. */
193	IDTE_INT_GEN(), /* 25 - - I - - User defined Interrupts, external of INT n. */
194	IDTE_INT_GEN(), /* 26 - - I - - User defined Interrupts, external of INT n. */
195	IDTE_INT_GEN(), /* 27 - - I - - User defined Interrupts, external of INT n. */
196	IDTE_INT_GEN(), /* 28 - - I - - User defined Interrupts, external of INT n. */
197	IDTE_INT_GEN(), /* 29 - - I - - User defined Interrupts, external of INT n. */
198	IDTE_INT_GEN(), /* 2a - - I - - User defined Interrupts, external of INT n. */
199	IDTE_INT_GEN(), /* 2b - - I - - User defined Interrupts, external of INT n. */
200	IDTE_INT_GEN(), /* 2c - - I - - User defined Interrupts, external of INT n. */
201	IDTE_INT_GEN(), /* 2d - - I - - User defined Interrupts, external of INT n. */
202	IDTE_INT_GEN(), /* 2e - - I - - User defined Interrupts, external of INT n. */
203	IDTE_INT_GEN(), /* 2f - - I - - User defined Interrupts, external of INT n. */
204	IDTE_INT_GEN(), /* 30 - - I - - User defined Interrupts, external of INT n. */
205	IDTE_INT_GEN(), /* 31 - - I - - User defined Interrupts, external of INT n. */
206	IDTE_INT_GEN(), /* 32 - - I - - User defined Interrupts, external of INT n. */
207	IDTE_INT_GEN(), /* 33 - - I - - User defined Interrupts, external of INT n. */
208	IDTE_INT_GEN(), /* 34 - - I - - User defined Interrupts, external of INT n. */
209	IDTE_INT_GEN(), /* 35 - - I - - User defined Interrupts, external of INT n. */
210	IDTE_INT_GEN(), /* 36 - - I - - User defined Interrupts, external of INT n. */
211	IDTE_INT_GEN(), /* 37 - - I - - User defined Interrupts, external of INT n. */
212	IDTE_INT_GEN(), /* 38 - - I - - User defined Interrupts, external of INT n. */
213	IDTE_INT_GEN(), /* 39 - - I - - User defined Interrupts, external of INT n. */
214	IDTE_INT_GEN(), /* 3a - - I - - User defined Interrupts, external of INT n. */
215	IDTE_INT_GEN(), /* 3b - - I - - User defined Interrupts, external of INT n. */
216	IDTE_INT_GEN(), /* 3c - - I - - User defined Interrupts, external of INT n. */
217	IDTE_INT_GEN(), /* 3d - - I - - User defined Interrupts, external of INT n. */
218	IDTE_INT_GEN(), /* 3e - - I - - User defined Interrupts, external of INT n. */
219	IDTE_INT_GEN(), /* 3f - - I - - User defined Interrupts, external of INT n. */
220	IDTE_INT_GEN(), /* 40 - - I - - User defined Interrupts, external of INT n. */
221	IDTE_INT_GEN(), /* 41 - - I - - User defined Interrupts, external of INT n. */
222	IDTE_INT_GEN(), /* 42 - - I - - User defined Interrupts, external of INT n. */
223	IDTE_INT_GEN(), /* 43 - - I - - User defined Interrupts, external of INT n. */
224	IDTE_INT_GEN(), /* 44 - - I - - User defined Interrupts, external of INT n. */
225	IDTE_INT_GEN(), /* 45 - - I - - User defined Interrupts, external of INT n. */
226	IDTE_INT_GEN(), /* 46 - - I - - User defined Interrupts, external of INT n. */
227	IDTE_INT_GEN(), /* 47 - - I - - User defined Interrupts, external of INT n. */
228	IDTE_INT_GEN(), /* 48 - - I - - User defined Interrupts, external of INT n. */
229	IDTE_INT_GEN(), /* 49 - - I - - User defined Interrupts, external of INT n. */
230	IDTE_INT_GEN(), /* 4a - - I - - User defined Interrupts, external of INT n. */
231	IDTE_INT_GEN(), /* 4b - - I - - User defined Interrupts, external of INT n. */
232	IDTE_INT_GEN(), /* 4c - - I - - User defined Interrupts, external of INT n. */
233	IDTE_INT_GEN(), /* 4d - - I - - User defined Interrupts, external of INT n. */
234	IDTE_INT_GEN(), /* 4e - - I - - User defined Interrupts, external of INT n. */
235	IDTE_INT_GEN(), /* 4f - - I - - User defined Interrupts, external of INT n. */
236	IDTE_INT_GEN(), /* 50 - - I - - User defined Interrupts, external of INT n. */
237	IDTE_INT_GEN(), /* 51 - - I - - User defined Interrupts, external of INT n. */
238	IDTE_INT_GEN(), /* 52 - - I - - User defined Interrupts, external of INT n. */
239	IDTE_INT_GEN(), /* 53 - - I - - User defined Interrupts, external of INT n. */
240	IDTE_INT_GEN(), /* 54 - - I - - User defined Interrupts, external of INT n. */
241	IDTE_INT_GEN(), /* 55 - - I - - User defined Interrupts, external of INT n. */
242	IDTE_INT_GEN(), /* 56 - - I - - User defined Interrupts, external of INT n. */
243	IDTE_INT_GEN(), /* 57 - - I - - User defined Interrupts, external of INT n. */
244	IDTE_INT_GEN(), /* 58 - - I - - User defined Interrupts, external of INT n. */
245	IDTE_INT_GEN(), /* 59 - - I - - User defined Interrupts, external of INT n. */
246	IDTE_INT_GEN(), /* 5a - - I - - User defined Interrupts, external of INT n. */
247	IDTE_INT_GEN(), /* 5b - - I - - User defined Interrupts, external of INT n. */
248	IDTE_INT_GEN(), /* 5c - - I - - User defined Interrupts, external of INT n. */
249	IDTE_INT_GEN(), /* 5d - - I - - User defined Interrupts, external of INT n. */
250	IDTE_INT_GEN(), /* 5e - - I - - User defined Interrupts, external of INT n. */
251	IDTE_INT_GEN(), /* 5f - - I - - User defined Interrupts, external of INT n. */
252	IDTE_INT_GEN(), /* 60 - - I - - User defined Interrupts, external of INT n. */
253	IDTE_INT_GEN(), /* 61 - - I - - User defined Interrupts, external of INT n. */
254	IDTE_INT_GEN(), /* 62 - - I - - User defined Interrupts, external of INT n. */
255	IDTE_INT_GEN(), /* 63 - - I - - User defined Interrupts, external of INT n. */
256	IDTE_INT_GEN(), /* 64 - - I - - User defined Interrupts, external of INT n. */
257	IDTE_INT_GEN(), /* 65 - - I - - User defined Interrupts, external of INT n. */
258	IDTE_INT_GEN(), /* 66 - - I - - User defined Interrupts, external of INT n. */
259	IDTE_INT_GEN(), /* 67 - - I - - User defined Interrupts, external of INT n. */
260	IDTE_INT_GEN(), /* 68 - - I - - User defined Interrupts, external of INT n. */
261	IDTE_INT_GEN(), /* 69 - - I - - User defined Interrupts, external of INT n. */
262	IDTE_INT_GEN(), /* 6a - - I - - User defined Interrupts, external of INT n. */
263	IDTE_INT_GEN(), /* 6b - - I - - User defined Interrupts, external of INT n. */
264	IDTE_INT_GEN(), /* 6c - - I - - User defined Interrupts, external of INT n. */
265	IDTE_INT_GEN(), /* 6d - - I - - User defined Interrupts, external of INT n. */
266	IDTE_INT_GEN(), /* 6e - - I - - User defined Interrupts, external of INT n. */
267	IDTE_INT_GEN(), /* 6f - - I - - User defined Interrupts, external of INT n. */
268	IDTE_INT_GEN(), /* 70 - - I - - User defined Interrupts, external of INT n. */
269	IDTE_INT_GEN(), /* 71 - - I - - User defined Interrupts, external of INT n. */
270	IDTE_INT_GEN(), /* 72 - - I - - User defined Interrupts, external of INT n. */
271	IDTE_INT_GEN(), /* 73 - - I - - User defined Interrupts, external of INT n. */
272	IDTE_INT_GEN(), /* 74 - - I - - User defined Interrupts, external of INT n. */
273	IDTE_INT_GEN(), /* 75 - - I - - User defined Interrupts, external of INT n. */
274	IDTE_INT_GEN(), /* 76 - - I - - User defined Interrupts, external of INT n. */
275	IDTE_INT_GEN(), /* 77 - - I - - User defined Interrupts, external of INT n. */
276	IDTE_INT_GEN(), /* 78 - - I - - User defined Interrupts, external of INT n. */
277	IDTE_INT_GEN(), /* 79 - - I - - User defined Interrupts, external of INT n. */
278	IDTE_INT_GEN(), /* 7a - - I - - User defined Interrupts, external of INT n. */
279	IDTE_INT_GEN(), /* 7b - - I - - User defined Interrupts, external of INT n. */
280	IDTE_INT_GEN(), /* 7c - - I - - User defined Interrupts, external of INT n. */
281	IDTE_INT_GEN(), /* 7d - - I - - User defined Interrupts, external of INT n. */
282	IDTE_INT_GEN(), /* 7e - - I - - User defined Interrupts, external of INT n. */
283	IDTE_INT_GEN(), /* 7f - - I - - User defined Interrupts, external of INT n. */
284	IDTE_INT_GEN(), /* 80 - - I - - User defined Interrupts, external of INT n. */
285	IDTE_INT_GEN(), /* 81 - - I - - User defined Interrupts, external of INT n. */
286	IDTE_INT_GEN(), /* 82 - - I - - User defined Interrupts, external of INT n. */
287	IDTE_INT_GEN(), /* 83 - - I - - User defined Interrupts, external of INT n. */
288	IDTE_INT_GEN(), /* 84 - - I - - User defined Interrupts, external of INT n. */
289	IDTE_INT_GEN(), /* 85 - - I - - User defined Interrupts, external of INT n. */
290	IDTE_INT_GEN(), /* 86 - - I - - User defined Interrupts, external of INT n. */
291	IDTE_INT_GEN(), /* 87 - - I - - User defined Interrupts, external of INT n. */
292	IDTE_INT_GEN(), /* 88 - - I - - User defined Interrupts, external of INT n. */
293	IDTE_INT_GEN(), /* 89 - - I - - User defined Interrupts, external of INT n. */
294	IDTE_INT_GEN(), /* 8a - - I - - User defined Interrupts, external of INT n. */
295	IDTE_INT_GEN(), /* 8b - - I - - User defined Interrupts, external of INT n. */
296	IDTE_INT_GEN(), /* 8c - - I - - User defined Interrupts, external of INT n. */
297	IDTE_INT_GEN(), /* 8d - - I - - User defined Interrupts, external of INT n. */
298	IDTE_INT_GEN(), /* 8e - - I - - User defined Interrupts, external of INT n. */
299	IDTE_INT_GEN(), /* 8f - - I - - User defined Interrupts, external of INT n. */
300	IDTE_INT_GEN(), /* 90 - - I - - User defined Interrupts, external of INT n. */
301	IDTE_INT_GEN(), /* 91 - - I - - User defined Interrupts, external of INT n. */
302	IDTE_INT_GEN(), /* 92 - - I - - User defined Interrupts, external of INT n. */
303	IDTE_INT_GEN(), /* 93 - - I - - User defined Interrupts, external of INT n. */
304	IDTE_INT_GEN(), /* 94 - - I - - User defined Interrupts, external of INT n. */
305	IDTE_INT_GEN(), /* 95 - - I - - User defined Interrupts, external of INT n. */
306	IDTE_INT_GEN(), /* 96 - - I - - User defined Interrupts, external of INT n. */
307	IDTE_INT_GEN(), /* 97 - - I - - User defined Interrupts, external of INT n. */
308	IDTE_INT_GEN(), /* 98 - - I - - User defined Interrupts, external of INT n. */
309	IDTE_INT_GEN(), /* 99 - - I - - User defined Interrupts, external of INT n. */
310	IDTE_INT_GEN(), /* 9a - - I - - User defined Interrupts, external of INT n. */
311	IDTE_INT_GEN(), /* 9b - - I - - User defined Interrupts, external of INT n. */
312	IDTE_INT_GEN(), /* 9c - - I - - User defined Interrupts, external of INT n. */
313	IDTE_INT_GEN(), /* 9d - - I - - User defined Interrupts, external of INT n. */
314	IDTE_INT_GEN(), /* 9e - - I - - User defined Interrupts, external of INT n. */
315	IDTE_INT_GEN(), /* 9f - - I - - User defined Interrupts, external of INT n. */
316	IDTE_INT_GEN(), /* a0 - - I - - User defined Interrupts, external of INT n. */
317	IDTE_INT_GEN(), /* a1 - - I - - User defined Interrupts, external of INT n. */
318	IDTE_INT_GEN(), /* a2 - - I - - User defined Interrupts, external of INT n. */
319	IDTE_INT_GEN(), /* a3 - - I - - User defined Interrupts, external of INT n. */
320	IDTE_INT_GEN(), /* a4 - - I - - User defined Interrupts, external of INT n. */
321	IDTE_INT_GEN(), /* a5 - - I - - User defined Interrupts, external of INT n. */
322	IDTE_INT_GEN(), /* a6 - - I - - User defined Interrupts, external of INT n. */
323	IDTE_INT_GEN(), /* a7 - - I - - User defined Interrupts, external of INT n. */
324	IDTE_INT_GEN(), /* a8 - - I - - User defined Interrupts, external of INT n. */
325	IDTE_INT_GEN(), /* a9 - - I - - User defined Interrupts, external of INT n. */
326	IDTE_INT_GEN(), /* aa - - I - - User defined Interrupts, external of INT n. */
327	IDTE_INT_GEN(), /* ab - - I - - User defined Interrupts, external of INT n. */
328	IDTE_INT_GEN(), /* ac - - I - - User defined Interrupts, external of INT n. */
329	IDTE_INT_GEN(), /* ad - - I - - User defined Interrupts, external of INT n. */
330	IDTE_INT_GEN(), /* ae - - I - - User defined Interrupts, external of INT n. */
331	IDTE_INT_GEN(), /* af - - I - - User defined Interrupts, external of INT n. */
332	IDTE_INT_GEN(), /* b0 - - I - - User defined Interrupts, external of INT n. */
333	IDTE_INT_GEN(), /* b1 - - I - - User defined Interrupts, external of INT n. */
334	IDTE_INT_GEN(), /* b2 - - I - - User defined Interrupts, external of INT n. */
335	IDTE_INT_GEN(), /* b3 - - I - - User defined Interrupts, external of INT n. */
336	IDTE_INT_GEN(), /* b4 - - I - - User defined Interrupts, external of INT n. */
337	IDTE_INT_GEN(), /* b5 - - I - - User defined Interrupts, external of INT n. */
338	IDTE_INT_GEN(), /* b6 - - I - - User defined Interrupts, external of INT n. */
339	IDTE_INT_GEN(), /* b7 - - I - - User defined Interrupts, external of INT n. */
340	IDTE_INT_GEN(), /* b8 - - I - - User defined Interrupts, external of INT n. */
341	IDTE_INT_GEN(), /* b9 - - I - - User defined Interrupts, external of INT n. */
342	IDTE_INT_GEN(), /* ba - - I - - User defined Interrupts, external of INT n. */
343	IDTE_INT_GEN(), /* bb - - I - - User defined Interrupts, external of INT n. */
344	IDTE_INT_GEN(), /* bc - - I - - User defined Interrupts, external of INT n. */
345	IDTE_INT_GEN(), /* bd - - I - - User defined Interrupts, external of INT n. */
346	IDTE_INT_GEN(), /* be - - I - - User defined Interrupts, external of INT n. */
347	IDTE_INT_GEN(), /* bf - - I - - User defined Interrupts, external of INT n. */
348	IDTE_INT_GEN(), /* c0 - - I - - User defined Interrupts, external of INT n. */
349	IDTE_INT_GEN(), /* c1 - - I - - User defined Interrupts, external of INT n. */
350	IDTE_INT_GEN(), /* c2 - - I - - User defined Interrupts, external of INT n. */
351	IDTE_INT_GEN(), /* c3 - - I - - User defined Interrupts, external of INT n. */
352	IDTE_INT_GEN(), /* c4 - - I - - User defined Interrupts, external of INT n. */
353	IDTE_INT_GEN(), /* c5 - - I - - User defined Interrupts, external of INT n. */
354	IDTE_INT_GEN(), /* c6 - - I - - User defined Interrupts, external of INT n. */
355	IDTE_INT_GEN(), /* c7 - - I - - User defined Interrupts, external of INT n. */
356	IDTE_INT_GEN(), /* c8 - - I - - User defined Interrupts, external of INT n. */
357	IDTE_INT_GEN(), /* c9 - - I - - User defined Interrupts, external of INT n. */
358	IDTE_INT_GEN(), /* ca - - I - - User defined Interrupts, external of INT n. */
359	IDTE_INT_GEN(), /* cb - - I - - User defined Interrupts, external of INT n. */
360	IDTE_INT_GEN(), /* cc - - I - - User defined Interrupts, external of INT n. */
361	IDTE_INT_GEN(), /* cd - - I - - User defined Interrupts, external of INT n. */
362	IDTE_INT_GEN(), /* ce - - I - - User defined Interrupts, external of INT n. */
363	IDTE_INT_GEN(), /* cf - - I - - User defined Interrupts, external of INT n. */
364	IDTE_INT_GEN(), /* d0 - - I - - User defined Interrupts, external of INT n. */
365	IDTE_INT_GEN(), /* d1 - - I - - User defined Interrupts, external of INT n. */
366	IDTE_INT_GEN(), /* d2 - - I - - User defined Interrupts, external of INT n. */
367	IDTE_INT_GEN(), /* d3 - - I - - User defined Interrupts, external of INT n. */
368	IDTE_INT_GEN(), /* d4 - - I - - User defined Interrupts, external of INT n. */
369	IDTE_INT_GEN(), /* d5 - - I - - User defined Interrupts, external of INT n. */
370	IDTE_INT_GEN(), /* d6 - - I - - User defined Interrupts, external of INT n. */
371	IDTE_INT_GEN(), /* d7 - - I - - User defined Interrupts, external of INT n. */
372	IDTE_INT_GEN(), /* d8 - - I - - User defined Interrupts, external of INT n. */
373	IDTE_INT_GEN(), /* d9 - - I - - User defined Interrupts, external of INT n. */
374	IDTE_INT_GEN(), /* da - - I - - User defined Interrupts, external of INT n. */
375	IDTE_INT_GEN(), /* db - - I - - User defined Interrupts, external of INT n. */
376	IDTE_INT_GEN(), /* dc - - I - - User defined Interrupts, external of INT n. */
377	IDTE_INT_GEN(), /* dd - - I - - User defined Interrupts, external of INT n. */
378	IDTE_INT_GEN(), /* de - - I - - User defined Interrupts, external of INT n. */
379	IDTE_INT_GEN(), /* df - - I - - User defined Interrupts, external of INT n. */
380	IDTE_INT_GEN(), /* e0 - - I - - User defined Interrupts, external of INT n. */
381	IDTE_INT_GEN(), /* e1 - - I - - User defined Interrupts, external of INT n. */
382	IDTE_INT_GEN(), /* e2 - - I - - User defined Interrupts, external of INT n. */
383	IDTE_INT_GEN(), /* e3 - - I - - User defined Interrupts, external of INT n. */
384	IDTE_INT_GEN(), /* e4 - - I - - User defined Interrupts, external of INT n. */
385	IDTE_INT_GEN(), /* e5 - - I - - User defined Interrupts, external of INT n. */
386	IDTE_INT_GEN(), /* e6 - - I - - User defined Interrupts, external of INT n. */
387	IDTE_INT_GEN(), /* e7 - - I - - User defined Interrupts, external of INT n. */
388	IDTE_INT_GEN(), /* e8 - - I - - User defined Interrupts, external of INT n. */
389	IDTE_INT_GEN(), /* e9 - - I - - User defined Interrupts, external of INT n. */
390	IDTE_INT_GEN(), /* ea - - I - - User defined Interrupts, external of INT n. */
391	IDTE_INT_GEN(), /* eb - - I - - User defined Interrupts, external of INT n. */
392	IDTE_INT_GEN(), /* ec - - I - - User defined Interrupts, external of INT n. */
393	IDTE_INT_GEN(), /* ed - - I - - User defined Interrupts, external of INT n. */
394	IDTE_INT_GEN(), /* ee - - I - - User defined Interrupts, external of INT n. */
395	IDTE_INT_GEN(), /* ef - - I - - User defined Interrupts, external of INT n. */
396	IDTE_INT_GEN(), /* f0 - - I - - User defined Interrupts, external of INT n. */
397	IDTE_INT_GEN(), /* f1 - - I - - User defined Interrupts, external of INT n. */
398	IDTE_INT_GEN(), /* f2 - - I - - User defined Interrupts, external of INT n. */
399	IDTE_INT_GEN(), /* f3 - - I - - User defined Interrupts, external of INT n. */
400	IDTE_INT_GEN(), /* f4 - - I - - User defined Interrupts, external of INT n. */
401	IDTE_INT_GEN(), /* f5 - - I - - User defined Interrupts, external of INT n. */
402	IDTE_INT_GEN(), /* f6 - - I - - User defined Interrupts, external of INT n. */
403	IDTE_INT_GEN(), /* f7 - - I - - User defined Interrupts, external of INT n. */
404	IDTE_INT_GEN(), /* f8 - - I - - User defined Interrupts, external of INT n. */
405	IDTE_INT_GEN(), /* f9 - - I - - User defined Interrupts, external of INT n. */
406	IDTE_INT_GEN(), /* fa - - I - - User defined Interrupts, external of INT n. */
407	IDTE_INT_GEN(), /* fb - - I - - User defined Interrupts, external of INT n. */
408	IDTE_INT_GEN(), /* fc - - I - - User defined Interrupts, external of INT n. */
409	IDTE_INT_GEN(), /* fd - - I - - User defined Interrupts, external of INT n. */
410	IDTE_INT_GEN(), /* fe - - I - - User defined Interrupts, external of INT n. */
411	IDTE_INT_GEN(), /* ff - - I - - User defined Interrupts, external of INT n. */
412	#undef IDTE_TRAP
413	#undef IDTE_TRAP_GEN
414	#undef IDTE_INT
415	#undef IDTE_INT_GEN
416	#undef IDTE_TASK
417	#undef IDTE_UNUSED
418	#undef IDTE_RESERVED
419	};
420
421
422	/** Enable or disable tracking of Guest's IDT. */
423	#define TRPM_TRACK_GUEST_IDT_CHANGES
424
425	/** Enable or disable tracking of Shadow IDT. */
426	#define TRPM_TRACK_SHADOW_IDT_CHANGES
427
428	/** TRPM saved state version. */
429	#define TRPM_SAVED_STATE_VERSION 9
430	#define TRPM_SAVED_STATE_VERSION_UNI 8 /* SMP support bumped the version */
431
432
433	/*******************************************************************************
434	* Internal Functions *
435	*******************************************************************************/
436	static DECLCALLBACK(int) trpmR3Save(PVM pVM, PSSMHANDLE pSSM);
437	static DECLCALLBACK(int) trpmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass);
438	static DECLCALLBACK(int) trpmR3GuestIDTWriteHandler(PVM pVM, RTGCPTR GCPtr, void pvPtr, void pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser);
439
440
441	/**
442	* Initializes the Trap Manager
443	*
444	* @returns VBox status code.
445	* @param pVM The VM to operate on.
446	*/
447	VMMR3DECL(int) TRPMR3Init(PVM pVM)
448	{
449	LogFlow(("TRPMR3Init\n"));
450
451	/*
452	* Assert sizes and alignments.
453	*/
454	AssertRelease(!(RT_OFFSETOF(VM, trpm.s) & 31));
455	AssertRelease(!(RT_OFFSETOF(VM, trpm.s.aIdt) & 15));
456	AssertRelease(sizeof(pVM->trpm.s) <= sizeof(pVM->trpm.padding));
457	AssertRelease(RT_ELEMENTS(pVM->trpm.s.aGuestTrapHandler) == sizeof(pVM->trpm.s.au32IdtPatched)*8);
458
459	/*
460	* Initialize members.
461	*/
462	pVM->trpm.s.offVM = RT_OFFSETOF(VM, trpm);
463	pVM->trpm.s.offTRPMCPU = RT_OFFSETOF(VM, aCpus[0].trpm) - RT_OFFSETOF(VM, trpm);
464
465	for (VMCPUID i = 0; i < pVM->cCpus; i++)
466	{
467	PVMCPU pVCpu = &pVM->aCpus[i];
468
469	pVCpu->trpm.s.offVM = RT_OFFSETOF(VM, aCpus[i].trpm);
470	pVCpu->trpm.s.offVMCpu = RT_OFFSETOF(VMCPU, trpm);
471	pVCpu->trpm.s.uActiveVector = ~0;
472	}
473
474	pVM->trpm.s.GuestIdtr.pIdt = RTRCPTR_MAX;
475	pVM->trpm.s.pvMonShwIdtRC = RTRCPTR_MAX;
476	pVM->trpm.s.fDisableMonitoring = false;
477	pVM->trpm.s.fSafeToDropGuestIDTMonitoring = false;
478
479	/*
480	* Read the configuration (if any).
481	*/
482	PCFGMNODE pTRPMNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "TRPM");
483	if (pTRPMNode)
484	{
485	bool f;
486	int rc = CFGMR3QueryBool(pTRPMNode, "SafeToDropGuestIDTMonitoring", &f);
487	if (RT_SUCCESS(rc))
488	pVM->trpm.s.fSafeToDropGuestIDTMonitoring = f;
489	}
490
491	/* write config summary to log */
492	if (pVM->trpm.s.fSafeToDropGuestIDTMonitoring)
493	LogRel(("TRPM: Dropping Guest IDT Monitoring.\n"));
494
495	/*
496	* Initialize the IDT.
497	* The handler addresses will be set in the TRPMR3Relocate() function.
498	*/
499	Assert(sizeof(pVM->trpm.s.aIdt) == sizeof(g_aIdt));
500	memcpy(&pVM->trpm.s.aIdt[0], &g_aIdt[0], sizeof(pVM->trpm.s.aIdt));
501
502	/*
503	* Register the saved state data unit.
504	*/
505	int rc = SSMR3RegisterInternal(pVM, "trpm", 1, TRPM_SAVED_STATE_VERSION, sizeof(TRPM),
506	NULL, NULL, NULL,
507	NULL, trpmR3Save, NULL,
508	NULL, trpmR3Load, NULL);
509	if (RT_FAILURE(rc))
510	return rc;
511
512	/*
513	* Statistics.
514	*/
515	STAM_REG(pVM, &pVM->trpm.s.StatRCWriteGuestIDTFault, STAMTYPE_COUNTER, "/TRPM/RC/IDTWritesFault", STAMUNIT_OCCURENCES, "Guest IDT writes the we returned to R3 to handle.");
516	STAM_REG(pVM, &pVM->trpm.s.StatRCWriteGuestIDTHandled, STAMTYPE_COUNTER, "/TRPM/RC/IDTWritesHandled", STAMUNIT_OCCURENCES, "Guest IDT writes that we handled successfully.");
517	STAM_REG(pVM, &pVM->trpm.s.StatSyncIDT, STAMTYPE_PROFILE, "/PROF/TRPM/SyncIDT", STAMUNIT_TICKS_PER_CALL, "Profiling of TRPMR3SyncIDT().");
518
519	/* traps */
520	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x00], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/00", STAMUNIT_TICKS_PER_CALL, "#DE - Divide error.");
521	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).");
522	//STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x02], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/02", STAMUNIT_TICKS_PER_CALL, "NMI");
523	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x03], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/03", STAMUNIT_TICKS_PER_CALL, "#BP - Breakpoint.");
524	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x04], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/04", STAMUNIT_TICKS_PER_CALL, "#OF - Overflow.");
525	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x05], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/05", STAMUNIT_TICKS_PER_CALL, "#BR - Bound range exceeded.");
526	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x06], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/06", STAMUNIT_TICKS_PER_CALL, "#UD - Undefined opcode.");
527	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x07], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/07", STAMUNIT_TICKS_PER_CALL, "#NM - Device not available (FPU).");
528	//STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x08], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/08", STAMUNIT_TICKS_PER_CALL, "#DF - Double fault.");
529	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x09], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/09", STAMUNIT_TICKS_PER_CALL, "#?? - Coprocessor segment overrun (obsolete).");
530	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0a], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0a", STAMUNIT_TICKS_PER_CALL, "#TS - Task switch fault.");
531	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0b], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0b", STAMUNIT_TICKS_PER_CALL, "#NP - Segemnt not present.");
532	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0c], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0c", STAMUNIT_TICKS_PER_CALL, "#SS - Stack segment fault.");
533	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0d], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0d", STAMUNIT_TICKS_PER_CALL, "#GP - General protection fault.");
534	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0e], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0e", STAMUNIT_TICKS_PER_CALL, "#PF - Page fault.");
535	//STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0f], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0f", STAMUNIT_TICKS_PER_CALL, "Reserved.");
536	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x10], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/10", STAMUNIT_TICKS_PER_CALL, "#MF - Math fault..");
537	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x11], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/11", STAMUNIT_TICKS_PER_CALL, "#AC - Alignment check.");
538	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x12], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/12", STAMUNIT_TICKS_PER_CALL, "#MC - Machine check.");
539	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x13], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/13", STAMUNIT_TICKS_PER_CALL, "#XF - SIMD Floating-Point Exception.");
540
541	#ifdef VBOX_WITH_STATISTICS
542	rc = MMHyperAlloc(pVM, sizeof(STAMCOUNTER) * 255, 8, MM_TAG_STAM, (void **)&pVM->trpm.s.paStatForwardedIRQR3);
543	AssertRCReturn(rc, rc);
544	pVM->trpm.s.paStatForwardedIRQRC = MMHyperR3ToRC(pVM, pVM->trpm.s.paStatForwardedIRQR3);
545	pVM->trpm.s.paStatForwardedIRQR0 = MMHyperR3ToR0(pVM, pVM->trpm.s.paStatForwardedIRQR3);
546	for (unsigned i = 0; i < 255; i++)
547	STAMR3RegisterF(pVM, &pVM->trpm.s.paStatForwardedIRQR3[i], STAMTYPE_COUNTER, STAMVISIBILITY_USED, STAMUNIT_OCCURENCES, "Forwarded interrupts.",
548	i < 0x20 ? "/TRPM/ForwardRaw/TRAP/%02X" : "/TRPM/ForwardRaw/IRQ/%02X", i);
549	#endif
550
551	STAM_REG(pVM, &pVM->trpm.s.StatForwardProfR3, STAMTYPE_PROFILE_ADV, "/TRPM/ForwardRaw/ProfR3", STAMUNIT_TICKS_PER_CALL, "Profiling TRPMForwardTrap.");
552	STAM_REG(pVM, &pVM->trpm.s.StatForwardProfRZ, STAMTYPE_PROFILE_ADV, "/TRPM/ForwardRaw/ProfRZ", STAMUNIT_TICKS_PER_CALL, "Profiling TRPMForwardTrap.");
553	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailNoHandler, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/FailNoHandler", STAMUNIT_OCCURENCES,"Failure to forward interrupt in raw mode.");
554	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailPatchAddr, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/FailPatchAddr", STAMUNIT_OCCURENCES,"Failure to forward interrupt in raw mode.");
555	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailR3, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/FailR3", STAMUNIT_OCCURENCES, "Failure to forward interrupt in raw mode.");
556	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailRZ, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/FailRZ", STAMUNIT_OCCURENCES, "Failure to forward interrupt in raw mode.");
557
558	STAM_REG(pVM, &pVM->trpm.s.StatTrap0dDisasm, STAMTYPE_PROFILE, "/TRPM/RC/Traps/0d/Disasm", STAMUNIT_TICKS_PER_CALL, "Profiling disassembly part of trpmGCTrap0dHandler.");
559	STAM_REG(pVM, &pVM->trpm.s.StatTrap0dRdTsc, STAMTYPE_COUNTER, "/TRPM/RC/Traps/0d/RdTsc", STAMUNIT_OCCURENCES, "Number of RDTSC #GPs.");
560
561	/*
562	* Default action when entering raw mode for the first time
563	*/
564	PVMCPU pVCpu = &pVM->aCpus[0]; /* raw mode implies on VCPU */
565	VMCPU_FF_SET(pVCpu, VMCPU_FF_TRPM_SYNC_IDT);
566	return 0;
567	}
568
569
570	/**
571	* Applies relocations to data and code managed by this component.
572	*
573	* This function will be called at init and whenever the VMM need
574	* to relocate itself inside the GC.
575	*
576	* @param pVM The VM handle.
577	* @param offDelta Relocation delta relative to old location.
578	*/
579	VMMR3DECL(void) TRPMR3Relocate(PVM pVM, RTGCINTPTR offDelta)
580	{
581	/* Only applies to raw mode which supports only 1 VCPU. */
582	PVMCPU pVCpu = &pVM->aCpus[0];
583
584	LogFlow(("TRPMR3Relocate\n"));
585	/*
586	* Get the trap handler addresses.
587	*
588	* If VMMGC.gc is screwed, so are we. We'll assert here since it elsewise
589	* would make init order impossible if we should assert the presence of these
590	* exports in TRPMR3Init().
591	*/
592	RTRCPTR aRCPtrs[TRPM_HANDLER_MAX];
593	RT_ZERO(aRCPtrs);
594	int rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerInterupt", &aRCPtrs[TRPM_HANDLER_INT]);
595	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerInterupt in VMMGC.gc!\n"));
596
597	rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerGeneric", &aRCPtrs[TRPM_HANDLER_TRAP]);
598	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerGeneric in VMMGC.gc!\n"));
599
600	rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerTrap08", &aRCPtrs[TRPM_HANDLER_TRAP_08]);
601	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerTrap08 in VMMGC.gc!\n"));
602
603	rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerTrap12", &aRCPtrs[TRPM_HANDLER_TRAP_12]);
604	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerTrap12 in VMMGC.gc!\n"));
605
606	RTSEL SelCS = CPUMGetHyperCS(pVCpu);
607
608	/*
609	* Iterate the idt and set the addresses.
610	*/
611	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[0];
612	PVBOXIDTE_GENERIC pIdteTemplate = &g_aIdt[0];
613	for (unsigned i = 0; i < RT_ELEMENTS(pVM->trpm.s.aIdt); i++, pIdte++, pIdteTemplate++)
614	{
615	if ( pIdte->Gen.u1Present
616	&& !ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], i)
617	)
618	{
619	Assert(pIdteTemplate->u16OffsetLow < TRPM_HANDLER_MAX);
620	RTGCPTR Offset = aRCPtrs[pIdteTemplate->u16OffsetLow];
621	switch (pIdteTemplate->u16OffsetLow)
622	{
623	/*
624	* Generic handlers have different entrypoints for each possible
625	* vector number. These entrypoints makes a sort of an array with
626	* 8 byte entries where the vector number is the index.
627	* See TRPMGCHandlersA.asm for details.
628	*/
629	case TRPM_HANDLER_INT:
630	case TRPM_HANDLER_TRAP:
631	Offset += i * 8;
632	break;
633	case TRPM_HANDLER_TRAP_12:
634	break;
635	case TRPM_HANDLER_TRAP_08:
636	/* Handle #DF Task Gate in special way. */
637	pIdte->Gen.u16SegSel = SELMGetTrap8Selector(pVM);
638	pIdte->Gen.u16OffsetLow = 0;
639	pIdte->Gen.u16OffsetHigh = 0;
640	SELMSetTrap8EIP(pVM, Offset);
641	continue;
642	}
643	/* (non-task gates only ) */
644	pIdte->Gen.u16OffsetLow = Offset & 0xffff;
645	pIdte->Gen.u16OffsetHigh = Offset >> 16;
646	pIdte->Gen.u16SegSel = SelCS;
647	}
648	}
649
650	/*
651	* Update IDTR (limit is including!).
652	*/
653	CPUMSetHyperIDTR(pVCpu, VM_RC_ADDR(pVM, &pVM->trpm.s.aIdt[0]), sizeof(pVM->trpm.s.aIdt)-1);
654
655	if (!pVM->trpm.s.fDisableMonitoring)
656	{
657	#ifdef TRPM_TRACK_SHADOW_IDT_CHANGES
658	if (pVM->trpm.s.pvMonShwIdtRC != RTRCPTR_MAX)
659	{
660	rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.pvMonShwIdtRC);
661	AssertRC(rc);
662	}
663	pVM->trpm.s.pvMonShwIdtRC = VM_RC_ADDR(pVM, &pVM->trpm.s.aIdt[0]);
664	rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_HYPERVISOR, pVM->trpm.s.pvMonShwIdtRC, pVM->trpm.s.pvMonShwIdtRC + sizeof(pVM->trpm.s.aIdt) - 1,
665	0, 0, "trpmRCShadowIDTWriteHandler", 0, "Shadow IDT write access handler");
666	AssertRC(rc);
667	#endif
668	}
669
670	/* Relocate IDT handlers for forwarding guest traps/interrupts. */
671	for (uint32_t iTrap = 0; iTrap < RT_ELEMENTS(pVM->trpm.s.aGuestTrapHandler); iTrap++)
672	{
673	if (pVM->trpm.s.aGuestTrapHandler[iTrap] != TRPM_INVALID_HANDLER)
674	{
675	Log(("TRPMR3Relocate: iGate=%2X Handler %RRv -> %RRv\n", iTrap, pVM->trpm.s.aGuestTrapHandler[iTrap], pVM->trpm.s.aGuestTrapHandler[iTrap] + offDelta));
676	pVM->trpm.s.aGuestTrapHandler[iTrap] += offDelta;
677	}
678
679	if (ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], iTrap))
680	{
681	PVBOXIDTE pIdteCur = &pVM->trpm.s.aIdt[iTrap];
682	RTGCPTR pHandler = VBOXIDTE_OFFSET(*pIdteCur);
683
684	Log(("TRPMR3Relocate: *iGate=%2X Handler %RGv -> %RGv\n", iTrap, pHandler, pHandler + offDelta));
685	pHandler += offDelta;
686
687	pIdteCur->Gen.u16OffsetHigh = pHandler >> 16;
688	pIdteCur->Gen.u16OffsetLow = pHandler & 0xFFFF;
689	}
690	}
691
692	#ifdef VBOX_WITH_STATISTICS
693	pVM->trpm.s.paStatForwardedIRQRC += offDelta;
694	pVM->trpm.s.paStatForwardedIRQR0 = MMHyperR3ToR0(pVM, pVM->trpm.s.paStatForwardedIRQR3);
695	#endif
696	}
697
698
699	/**
700	* Terminates the Trap Manager
701	*
702	* @returns VBox status code.
703	* @param pVM The VM to operate on.
704	*/
705	VMMR3DECL(int) TRPMR3Term(PVM pVM)
706	{
707	NOREF(pVM);
708	return 0;
709	}
710
711
712	/**
713	* Resets a virtual CPU.
714	*
715	* Used by TRPMR3Reset and CPU hot plugging.
716	*
717	* @param pVCpu The virtual CPU handle.
718	*/
719	VMMR3DECL(void) TRPMR3ResetCpu(PVMCPU pVCpu)
720	{
721	pVCpu->trpm.s.uActiveVector = ~0;
722	}
723
724
725	/**
726	* The VM is being reset.
727	*
728	* For the TRPM component this means that any IDT write monitors
729	* needs to be removed, any pending trap cleared, and the IDT reset.
730	*
731	* @param pVM VM handle.
732	*/
733	VMMR3DECL(void) TRPMR3Reset(PVM pVM)
734	{
735	/*
736	* Deregister any virtual handlers.
737	*/
738	#ifdef TRPM_TRACK_GUEST_IDT_CHANGES
739	if (pVM->trpm.s.GuestIdtr.pIdt != RTRCPTR_MAX)
740	{
741	if (!pVM->trpm.s.fSafeToDropGuestIDTMonitoring)
742	{
743	int rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GuestIdtr.pIdt);
744	AssertRC(rc);
745	}
746	pVM->trpm.s.GuestIdtr.pIdt = RTRCPTR_MAX;
747	}
748	pVM->trpm.s.GuestIdtr.cbIdt = 0;
749	#endif
750
751	/*
752	* Reinitialize other members calling the relocator to get things right.
753	*/
754	for (VMCPUID i = 0; i < pVM->cCpus; i++)
755	TRPMR3ResetCpu(&pVM->aCpus[i]);
756	memcpy(&pVM->trpm.s.aIdt[0], &g_aIdt[0], sizeof(pVM->trpm.s.aIdt));
757	memset(pVM->trpm.s.aGuestTrapHandler, 0, sizeof(pVM->trpm.s.aGuestTrapHandler));
758	TRPMR3Relocate(pVM, 0);
759
760	/*
761	* Default action when entering raw mode for the first time
762	*/
763	PVMCPU pVCpu = &pVM->aCpus[0]; /* raw mode implies on VCPU */
764	VMCPU_FF_SET(pVCpu, VMCPU_FF_TRPM_SYNC_IDT);
765	}
766
767
768	/**
769	* Execute state save operation.
770	*
771	* @returns VBox status code.
772	* @param pVM VM Handle.
773	* @param pSSM SSM operation handle.
774	*/
775	static DECLCALLBACK(int) trpmR3Save(PVM pVM, PSSMHANDLE pSSM)
776	{
777	PTRPM pTrpm = &pVM->trpm.s;
778	LogFlow(("trpmR3Save:\n"));
779
780	/*
781	* Active and saved traps.
782	*/
783	for (VMCPUID i = 0; i < pVM->cCpus; i++)
784	{
785	PTRPMCPU pTrpmCpu = &pVM->aCpus[i].trpm.s;
786	SSMR3PutUInt(pSSM, pTrpmCpu->uActiveVector);
787	SSMR3PutUInt(pSSM, pTrpmCpu->enmActiveType);
788	SSMR3PutGCUInt(pSSM, pTrpmCpu->uActiveErrorCode);
789	SSMR3PutGCUIntPtr(pSSM, pTrpmCpu->uActiveCR2);
790	SSMR3PutGCUInt(pSSM, pTrpmCpu->uSavedVector);
791	SSMR3PutUInt(pSSM, pTrpmCpu->enmSavedType);
792	SSMR3PutGCUInt(pSSM, pTrpmCpu->uSavedErrorCode);
793	SSMR3PutGCUIntPtr(pSSM, pTrpmCpu->uSavedCR2);
794	SSMR3PutGCUInt(pSSM, pTrpmCpu->uPrevVector);
795	}
796	SSMR3PutBool(pSSM, pTrpm->fDisableMonitoring);
797	PVMCPU pVCpu = &pVM->aCpus[0]; /* raw mode implies 1 VCPU */
798	SSMR3PutUInt(pSSM, VMCPU_FF_ISSET(pVCpu, VMCPU_FF_TRPM_SYNC_IDT));
799	SSMR3PutMem(pSSM, &pTrpm->au32IdtPatched[0], sizeof(pTrpm->au32IdtPatched));
800	SSMR3PutU32(pSSM, ~0); /* separator. */
801
802	/*
803	* Save any trampoline gates.
804	*/
805	for (uint32_t iTrap = 0; iTrap < RT_ELEMENTS(pTrpm->aGuestTrapHandler); iTrap++)
806	{
807	if (pTrpm->aGuestTrapHandler[iTrap])
808	{
809	SSMR3PutU32(pSSM, iTrap);
810	SSMR3PutGCPtr(pSSM, pTrpm->aGuestTrapHandler[iTrap]);
811	SSMR3PutMem(pSSM, &pTrpm->aIdt[iTrap], sizeof(pTrpm->aIdt[iTrap]));
812	}
813	}
814
815	return SSMR3PutU32(pSSM, ~0); /* terminator */
816	}
817
818
819	/**
820	* Execute state load operation.
821	*
822	* @returns VBox status code.
823	* @param pVM VM Handle.
824	* @param pSSM SSM operation handle.
825	* @param uVersion Data layout version.
826	* @param uPass The data pass.
827	*/
828	static DECLCALLBACK(int) trpmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
829	{
830	LogFlow(("trpmR3Load:\n"));
831	Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
832
833	/*
834	* Validate version.
835	*/
836	if ( uVersion != TRPM_SAVED_STATE_VERSION
837	&& uVersion != TRPM_SAVED_STATE_VERSION_UNI)
838	{
839	AssertMsgFailed(("trpmR3Load: Invalid version uVersion=%d!\n", uVersion));
840	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
841	}
842
843	/*
844	* Call the reset function to kick out any handled gates and other potential trouble.
845	*/
846	TRPMR3Reset(pVM);
847
848	/*
849	* Active and saved traps.
850	*/
851	PTRPM pTrpm = &pVM->trpm.s;
852
853	if (uVersion == TRPM_SAVED_STATE_VERSION)
854	{
855	for (VMCPUID i = 0; i < pVM->cCpus; i++)
856	{
857	PTRPMCPU pTrpmCpu = &pVM->aCpus[i].trpm.s;
858	SSMR3GetUInt(pSSM, &pTrpmCpu->uActiveVector);
859	SSMR3GetUInt(pSSM, (uint32_t *)&pTrpmCpu->enmActiveType);
860	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uActiveErrorCode);
861	SSMR3GetGCUIntPtr(pSSM, &pTrpmCpu->uActiveCR2);
862	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uSavedVector);
863	SSMR3GetUInt(pSSM, (uint32_t *)&pTrpmCpu->enmSavedType);
864	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uSavedErrorCode);
865	SSMR3GetGCUIntPtr(pSSM, &pTrpmCpu->uSavedCR2);
866	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uPrevVector);
867	}
868
869	SSMR3GetBool(pSSM, &pVM->trpm.s.fDisableMonitoring);
870	}
871	else
872	{
873	PTRPMCPU pTrpmCpu = &pVM->aCpus[0].trpm.s;
874	SSMR3GetUInt(pSSM, &pTrpmCpu->uActiveVector);
875	SSMR3GetUInt(pSSM, (uint32_t *)&pTrpmCpu->enmActiveType);
876	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uActiveErrorCode);
877	SSMR3GetGCUIntPtr(pSSM, &pTrpmCpu->uActiveCR2);
878	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uSavedVector);
879	SSMR3GetUInt(pSSM, (uint32_t *)&pTrpmCpu->enmSavedType);
880	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uSavedErrorCode);
881	SSMR3GetGCUIntPtr(pSSM, &pTrpmCpu->uSavedCR2);
882	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uPrevVector);
883
884	RTGCUINT fDisableMonitoring;
885	SSMR3GetGCUInt(pSSM, &fDisableMonitoring);
886	pTrpm->fDisableMonitoring = !!fDisableMonitoring;
887	}
888
889	RTUINT fSyncIDT;
890	int rc = SSMR3GetUInt(pSSM, &fSyncIDT);
891	if (RT_FAILURE(rc))
892	return rc;
893	if (fSyncIDT & ~1)
894	{
895	AssertMsgFailed(("fSyncIDT=%#x\n", fSyncIDT));
896	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
897	}
898	if (fSyncIDT)
899	{
900	PVMCPU pVCpu = &pVM->aCpus[0]; /* raw mode implies 1 VCPU */
901	VMCPU_FF_SET(pVCpu, VMCPU_FF_TRPM_SYNC_IDT);
902	}
903	/* else: cleared by reset call above. */
904
905	SSMR3GetMem(pSSM, &pTrpm->au32IdtPatched[0], sizeof(pTrpm->au32IdtPatched));
906
907	/* check the separator */
908	uint32_t u32Sep;
909	rc = SSMR3GetU32(pSSM, &u32Sep);
910	if (RT_FAILURE(rc))
911	return rc;
912	if (u32Sep != (uint32_t)~0)
913	{
914	AssertMsgFailed(("u32Sep=%#x (first)\n", u32Sep));
915	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
916	}
917
918	/*
919	* Restore any trampoline gates.
920	*/
921	for (;;)
922	{
923	/* gate number / terminator */
924	uint32_t iTrap;
925	rc = SSMR3GetU32(pSSM, &iTrap);
926	if (RT_FAILURE(rc))
927	return rc;
928	if (iTrap == (uint32_t)~0)
929	break;
930	if ( iTrap >= RT_ELEMENTS(pTrpm->aIdt)
931	\|\| pTrpm->aGuestTrapHandler[iTrap])
932	{
933	AssertMsgFailed(("iTrap=%#x\n", iTrap));
934	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
935	}
936
937	/* restore the IDT entry. */
938	RTGCPTR GCPtrHandler;
939	SSMR3GetGCPtr(pSSM, &GCPtrHandler);
940	VBOXIDTE Idte;
941	rc = SSMR3GetMem(pSSM, &Idte, sizeof(Idte));
942	if (RT_FAILURE(rc))
943	return rc;
944	Assert(GCPtrHandler);
945	pTrpm->aIdt[iTrap] = Idte;
946	}
947
948	return VINF_SUCCESS;
949	}
950
951
952	/**
953	* Check if gate handlers were updated
954	* (callback for the VMCPU_FF_TRPM_SYNC_IDT forced action).
955	*
956	* @returns VBox status code.
957	* @param pVM The VM handle.
958	* @param pVCpu The VMCPU handle.
959	*/
960	VMMR3DECL(int) TRPMR3SyncIDT(PVM pVM, PVMCPU pVCpu)
961	{
962	STAM_PROFILE_START(&pVM->trpm.s.StatSyncIDT, a);
963	const bool fRawRing0 = EMIsRawRing0Enabled(pVM);
964	int rc;
965
966	if (pVM->trpm.s.fDisableMonitoring)
967	{
968	VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_TRPM_SYNC_IDT);
969	return VINF_SUCCESS; /* Nothing to do */
970	}
971
972	if (fRawRing0 && CSAMIsEnabled(pVM))
973	{
974	/* Clear all handlers */
975	Log(("TRPMR3SyncIDT: Clear all trap handlers.\n"));
976	/** @todo inefficient, but simple */
977	for (unsigned iGate = 0; iGate < 256; iGate++)
978	trpmClearGuestTrapHandler(pVM, iGate);
979
980	/* Scan them all (only the first time) */
981	CSAMR3CheckGates(pVM, 0, 256);
982	}
983
984	/*
985	* Get the IDTR.
986	*/
987	VBOXIDTR IDTR;
988	IDTR.pIdt = CPUMGetGuestIDTR(pVCpu, &IDTR.cbIdt);
989	if (!IDTR.cbIdt)
990	{
991	Log(("No IDT entries...\n"));
992	return DBGFSTOP(pVM);
993	}
994
995	#ifdef TRPM_TRACK_GUEST_IDT_CHANGES
996	/*
997	* Check if Guest's IDTR has changed.
998	*/
999	if ( IDTR.pIdt != pVM->trpm.s.GuestIdtr.pIdt
1000	\|\| IDTR.cbIdt != pVM->trpm.s.GuestIdtr.cbIdt)
1001	{
1002	Log(("TRPMR3UpdateFromCPUM: Guest's IDT is changed to pIdt=%08X cbIdt=%08X\n", IDTR.pIdt, IDTR.cbIdt));
1003	if (!pVM->trpm.s.fSafeToDropGuestIDTMonitoring)
1004	{
1005	/*
1006	* [Re]Register write virtual handler for guest's IDT.
1007	*/
1008	if (pVM->trpm.s.GuestIdtr.pIdt != RTRCPTR_MAX)
1009	{
1010	rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GuestIdtr.pIdt);
1011	AssertRCReturn(rc, rc);
1012	}
1013	/* limit is including */
1014	rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_WRITE, IDTR.pIdt, IDTR.pIdt + IDTR.cbIdt /* already inclusive */,
1015	0, trpmR3GuestIDTWriteHandler, "trpmRCGuestIDTWriteHandler", 0, "Guest IDT write access handler");
1016
1017	if (rc == VERR_PGM_HANDLER_VIRTUAL_CONFLICT)
1018	{
1019	/* Could be a conflict with CSAM */
1020	CSAMR3RemovePage(pVM, IDTR.pIdt);
1021	if (PAGE_ADDRESS(IDTR.pIdt) != PAGE_ADDRESS(IDTR.pIdt + IDTR.cbIdt))
1022	CSAMR3RemovePage(pVM, IDTR.pIdt + IDTR.cbIdt);
1023
1024	rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_WRITE, IDTR.pIdt, IDTR.pIdt + IDTR.cbIdt /* already inclusive */,
1025	0, trpmR3GuestIDTWriteHandler, "trpmRCGuestIDTWriteHandler", 0, "Guest IDT write access handler");
1026	}
1027
1028	AssertRCReturn(rc, rc);
1029	}
1030
1031	/* Update saved Guest IDTR. */
1032	pVM->trpm.s.GuestIdtr = IDTR;
1033	}
1034	#endif
1035
1036	/*
1037	* Sync the interrupt gate.
1038	* Should probably check/sync the others too, but for now we'll handle that in #GP.
1039	*/
1040	X86DESC Idte3;
1041	rc = PGMPhysSimpleReadGCPtr(pVCpu, &Idte3, IDTR.pIdt + sizeof(Idte3) * 3, sizeof(Idte3));
1042	if (RT_FAILURE(rc))
1043	{
1044	AssertMsgRC(rc, ("Failed to read IDT[3]! rc=%Rrc\n", rc));
1045	return DBGFSTOP(pVM);
1046	}
1047	AssertRCReturn(rc, rc);
1048	if (fRawRing0)
1049	pVM->trpm.s.aIdt[3].Gen.u2DPL = RT_MAX(Idte3.Gen.u2Dpl, 1);
1050	else
1051	pVM->trpm.s.aIdt[3].Gen.u2DPL = Idte3.Gen.u2Dpl;
1052
1053	/*
1054	* Clear the FF and we're done.
1055	*/
1056	VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_TRPM_SYNC_IDT);
1057	STAM_PROFILE_STOP(&pVM->trpm.s.StatSyncIDT, a);
1058	return VINF_SUCCESS;
1059	}
1060
1061
1062	/**
1063	* Disable IDT monitoring and syncing
1064	*
1065	* @param pVM The VM to operate on.
1066	*/
1067	VMMR3DECL(void) TRPMR3DisableMonitoring(PVM pVM)
1068	{
1069	/*
1070	* Deregister any virtual handlers.
1071	*/
1072	#ifdef TRPM_TRACK_GUEST_IDT_CHANGES
1073	if (pVM->trpm.s.GuestIdtr.pIdt != RTRCPTR_MAX)
1074	{
1075	if (!pVM->trpm.s.fSafeToDropGuestIDTMonitoring)
1076	{
1077	int rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GuestIdtr.pIdt);
1078	AssertRC(rc);
1079	}
1080	pVM->trpm.s.GuestIdtr.pIdt = RTRCPTR_MAX;
1081	}
1082	pVM->trpm.s.GuestIdtr.cbIdt = 0;
1083	#endif
1084
1085	#ifdef TRPM_TRACK_SHADOW_IDT_CHANGES
1086	if (pVM->trpm.s.pvMonShwIdtRC != RTRCPTR_MAX)
1087	{
1088	int rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.pvMonShwIdtRC);
1089	AssertRC(rc);
1090	pVM->trpm.s.pvMonShwIdtRC = RTRCPTR_MAX;
1091	}
1092	#endif
1093
1094	PVMCPU pVCpu = &pVM->aCpus[0]; /* raw mode implies on VCPU */
1095	VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_TRPM_SYNC_IDT);
1096
1097	pVM->trpm.s.fDisableMonitoring = true;
1098	}
1099
1100
1101	/**
1102	* \#PF Handler callback for virtual access handler ranges.
1103	*
1104	* Important to realize that a physical page in a range can have aliases, and
1105	* for ALL and WRITE handlers these will also trigger.
1106	*
1107	* @returns VINF_SUCCESS if the handler have carried out the operation.
1108	* @returns VINF_PGM_HANDLER_DO_DEFAULT if the caller should carry out the access operation.
1109	* @param pVM VM Handle.
1110	* @param GCPtr The virtual address the guest is writing to. (not correct if it's an alias!)
1111	* @param pvPtr The HC mapping of that address.
1112	* @param pvBuf What the guest is reading/writing.
1113	* @param cbBuf How much it's reading/writing.
1114	* @param enmAccessType The access type.
1115	* @param pvUser User argument.
1116	*/
1117	static DECLCALLBACK(int) trpmR3GuestIDTWriteHandler(PVM pVM, RTGCPTR GCPtr, void pvPtr, void pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser)
1118	{
1119	Assert(enmAccessType == PGMACCESSTYPE_WRITE);
1120	Log(("trpmR3GuestIDTWriteHandler: write to %RGv size %d\n", GCPtr, cbBuf));
1121	VMCPU_FF_SET(VMMGetCpu(pVM), VMCPU_FF_TRPM_SYNC_IDT);
1122	return VINF_PGM_HANDLER_DO_DEFAULT;
1123	}
1124
1125
1126	/**
1127	* Clear passthrough interrupt gate handler (reset to default handler)
1128	*
1129	* @returns VBox status code.
1130	* @param pVM The VM to operate on.
1131	* @param iTrap Trap/interrupt gate number.
1132	*/
1133	VMMR3DECL(int) trpmR3ClearPassThroughHandler(PVM pVM, unsigned iTrap)
1134	{
1135	/* Only applies to raw mode which supports only 1 VCPU. */
1136	PVMCPU pVCpu = &pVM->aCpus[0];
1137
1138	/** @todo cleanup trpmR3ClearPassThroughHandler()! */
1139	RTRCPTR aGCPtrs[TRPM_HANDLER_MAX];
1140	int rc;
1141
1142	memset(aGCPtrs, 0, sizeof(aGCPtrs));
1143
1144	rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerInterupt", &aGCPtrs[TRPM_HANDLER_INT]);
1145	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerInterupt in VMMGC.gc!\n"));
1146
1147	if ( iTrap < TRPM_HANDLER_INT_BASE
1148	\|\| iTrap >= RT_ELEMENTS(pVM->trpm.s.aIdt))
1149	{
1150	AssertMsg(iTrap < TRPM_HANDLER_INT_BASE, ("Illegal gate number %#x!\n", iTrap));
1151	return VERR_INVALID_PARAMETER;
1152	}
1153	memcpy(&pVM->trpm.s.aIdt[iTrap], &g_aIdt[iTrap], sizeof(pVM->trpm.s.aIdt[0]));
1154
1155	/* Unmark it for relocation purposes. */
1156	ASMBitClear(&pVM->trpm.s.au32IdtPatched[0], iTrap);
1157
1158	RTSEL SelCS = CPUMGetHyperCS(pVCpu);
1159	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
1160	PVBOXIDTE_GENERIC pIdteTemplate = &g_aIdt[iTrap];
1161	if (pIdte->Gen.u1Present)
1162	{
1163	Assert(pIdteTemplate->u16OffsetLow == TRPM_HANDLER_INT);
1164	Assert(sizeof(RTRCPTR) == sizeof(aGCPtrs[0]));
1165	RTRCPTR Offset = (RTRCPTR)aGCPtrs[pIdteTemplate->u16OffsetLow];
1166
1167	/*
1168	* Generic handlers have different entrypoints for each possible
1169	* vector number. These entrypoints make a sort of an array with
1170	* 8 byte entries where the vector number is the index.
1171	* See TRPMGCHandlersA.asm for details.
1172	*/
1173	Offset += iTrap * 8;
1174
1175	if (pIdte->Gen.u5Type2 != VBOX_IDTE_TYPE2_TASK)
1176	{
1177	pIdte->Gen.u16OffsetLow = Offset & 0xffff;
1178	pIdte->Gen.u16OffsetHigh = Offset >> 16;
1179	pIdte->Gen.u16SegSel = SelCS;
1180	}
1181	}
1182
1183	return VINF_SUCCESS;
1184	}
1185
1186
1187	/**
1188	* Check if address is a gate handler (interrupt or trap).
1189	*
1190	* @returns gate nr or ~0 is not found
1191	*
1192	* @param pVM VM handle.
1193	* @param GCPtr GC address to check.
1194	*/
1195	VMMR3DECL(uint32_t) TRPMR3QueryGateByHandler(PVM pVM, RTRCPTR GCPtr)
1196	{
1197	for (uint32_t iTrap = 0; iTrap < RT_ELEMENTS(pVM->trpm.s.aGuestTrapHandler); iTrap++)
1198	{
1199	if (pVM->trpm.s.aGuestTrapHandler[iTrap] == GCPtr)
1200	return iTrap;
1201
1202	/* redundant */
1203	if (ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], iTrap))
1204	{
1205	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
1206	RTGCPTR pHandler = VBOXIDTE_OFFSET(*pIdte);
1207
1208	if (pHandler == GCPtr)
1209	return iTrap;
1210	}
1211	}
1212	return ~0;
1213	}
1214
1215
1216	/**
1217	* Get guest trap/interrupt gate handler
1218	*
1219	* @returns Guest trap handler address or TRPM_INVALID_HANDLER if none installed
1220	* @param pVM The VM to operate on.
1221	* @param iTrap Interrupt/trap number.
1222	*/
1223	VMMR3DECL(RTRCPTR) TRPMR3GetGuestTrapHandler(PVM pVM, unsigned iTrap)
1224	{
1225	AssertReturn(iTrap < RT_ELEMENTS(pVM->trpm.s.aIdt), TRPM_INVALID_HANDLER);
1226
1227	return pVM->trpm.s.aGuestTrapHandler[iTrap];
1228	}
1229
1230
1231	/**
1232	* Set guest trap/interrupt gate handler
1233	* Used for setting up trap gates used for kernel calls.
1234	*
1235	* @returns VBox status code.
1236	* @param pVM The VM to operate on.
1237	* @param iTrap Interrupt/trap number.
1238	* @param pHandler GC handler pointer
1239	*/
1240	VMMR3DECL(int) TRPMR3SetGuestTrapHandler(PVM pVM, unsigned iTrap, RTRCPTR pHandler)
1241	{
1242	/* Only valid in raw mode which implies 1 VCPU */
1243	Assert(PATMIsEnabled(pVM) && pVM->cCpus == 1);
1244	PVMCPU pVCpu = &pVM->aCpus[0];
1245
1246	/*
1247	* Validate.
1248	*/
1249	if (iTrap >= RT_ELEMENTS(pVM->trpm.s.aIdt))
1250	{
1251	AssertMsg(iTrap < TRPM_HANDLER_INT_BASE, ("Illegal gate number %d!\n", iTrap));
1252	return VERR_INVALID_PARAMETER;
1253	}
1254
1255	AssertReturn(pHandler == TRPM_INVALID_HANDLER \|\| PATMIsPatchGCAddr(pVM, pHandler), VERR_INVALID_PARAMETER);
1256
1257	uint16_t cbIDT;
1258	RTGCPTR GCPtrIDT = CPUMGetGuestIDTR(pVCpu, &cbIDT);
1259	if (iTrap * sizeof(VBOXIDTE) >= cbIDT)
1260	return VERR_INVALID_PARAMETER; /* Silently ignore out of range requests. */
1261
1262	if (pHandler == TRPM_INVALID_HANDLER)
1263	{
1264	/* clear trap handler */
1265	Log(("TRPMR3SetGuestTrapHandler: clear handler %x\n", iTrap));
1266	return trpmClearGuestTrapHandler(pVM, iTrap);
1267	}
1268
1269	/*
1270	* Read the guest IDT entry.
1271	*/
1272	VBOXIDTE GuestIdte;
1273	int rc = PGMPhysSimpleReadGCPtr(pVCpu, &GuestIdte, GCPtrIDT + iTrap * sizeof(GuestIdte), sizeof(GuestIdte));
1274	if (RT_FAILURE(rc))
1275	{
1276	AssertMsgRC(rc, ("Failed to read IDTE! rc=%Rrc\n", rc));
1277	return rc;
1278	}
1279
1280	if (EMIsRawRing0Enabled(pVM))
1281	{
1282	/*
1283	* Only replace handlers for which we are 100% certain there won't be
1284	* any host interrupts.
1285	*
1286	* 0x2E is safe on Windows because it's the system service interrupt gate. Not
1287	* quite certain if this is safe or not on 64-bit Vista, it probably is.
1288	*
1289	* 0x80 is safe on Linux because it's the syscall vector and is part of the
1290	* 32-bit usermode ABI. 64-bit Linux (usually) supports 32-bit processes
1291	* and will therefor never assign hardware interrupts to 0x80.
1292	*
1293	* Exactly why 0x80 is safe on 32-bit Windows is a bit hazy, but it seems
1294	* to work ok... However on 64-bit Vista (SMP?) is doesn't work reliably.
1295	* Booting Linux/BSD guest will cause system lockups on most of the computers.
1296	* -> Update: It seems gate 0x80 is not safe on 32-bits Windows either. See
1297	* defect #3604.
1298	*
1299	* PORTME - Check if your host keeps any of these gates free from hw ints.
1300	*
1301	* Note! SELMR3SyncTSS also has code related to this interrupt handler replacing.
1302	*/
1303	/** @todo handle those dependencies better! */
1304	/** @todo Solve this in a proper manner. see defect #1186 */
1305	#if defined(RT_OS_WINDOWS) && defined(RT_ARCH_X86)
1306	if (iTrap == 0x2E)
1307	#elif defined(RT_OS_LINUX)
1308	if (iTrap == 0x80)
1309	#else
1310	if (0)
1311	#endif
1312	{
1313	if ( GuestIdte.Gen.u1Present
1314	&& ( GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_TRAP_32
1315	\|\| GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32)
1316	&& GuestIdte.Gen.u2DPL == 3)
1317	{
1318	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
1319
1320	GuestIdte.Gen.u5Type2 = VBOX_IDTE_TYPE2_TRAP_32;
1321	GuestIdte.Gen.u16OffsetHigh = pHandler >> 16;
1322	GuestIdte.Gen.u16OffsetLow = pHandler & 0xFFFF;
1323	GuestIdte.Gen.u16SegSel \|= 1; //ring 1
1324	*pIdte = GuestIdte;
1325
1326	/* Mark it for relocation purposes. */
1327	ASMBitSet(&pVM->trpm.s.au32IdtPatched[0], iTrap);
1328
1329	/* Also store it in our guest trap array. */
1330	pVM->trpm.s.aGuestTrapHandler[iTrap] = pHandler;
1331
1332	Log(("Setting trap handler %x to %08X (direct)\n", iTrap, pHandler));
1333	return VINF_SUCCESS;
1334	}
1335	/* ok, let's try to install a trampoline handler then. */
1336	}
1337	}
1338
1339	if ( GuestIdte.Gen.u1Present
1340	&& ( GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_TRAP_32
1341	\|\| GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32)
1342	&& (GuestIdte.Gen.u2DPL == 3 \|\| GuestIdte.Gen.u2DPL == 0))
1343	{
1344	/*
1345	* Save handler which can be used for a trampoline call inside the GC
1346	*/
1347	Log(("Setting trap handler %x to %08X\n", iTrap, pHandler));
1348	pVM->trpm.s.aGuestTrapHandler[iTrap] = pHandler;
1349	return VINF_SUCCESS;
1350	}
1351	return VERR_INVALID_PARAMETER;
1352	}
1353
1354
1355	/**
1356	* Check if address is a gate handler (interrupt/trap/task/anything).
1357	*
1358	* @returns True is gate handler, false if not.
1359	*
1360	* @param pVM VM handle.
1361	* @param GCPtr GC address to check.
1362	*/
1363	VMMR3DECL(bool) TRPMR3IsGateHandler(PVM pVM, RTRCPTR GCPtr)
1364	{
1365	/* Only valid in raw mode which implies 1 VCPU */
1366	Assert(PATMIsEnabled(pVM) && pVM->cCpus == 1);
1367	PVMCPU pVCpu = &pVM->aCpus[0];
1368
1369	/*
1370	* Read IDTR and calc last entry.
1371	*/
1372	uint16_t cbIDT;
1373	RTGCPTR GCPtrIDTE = CPUMGetGuestIDTR(pVCpu, &cbIDT);
1374	unsigned cEntries = (cbIDT + 1) / sizeof(VBOXIDTE);
1375	if (!cEntries)
1376	return false;
1377	RTGCPTR GCPtrIDTELast = GCPtrIDTE + (cEntries - 1) * sizeof(VBOXIDTE);
1378
1379	/*
1380	* Outer loop: interate pages.
1381	*/
1382	while (GCPtrIDTE <= GCPtrIDTELast)
1383	{
1384	/*
1385	* Convert this page to a HC address.
1386	* (This function checks for not-present pages.)
1387	*/
1388	PCVBOXIDTE pIDTE;
1389	PGMPAGEMAPLOCK Lock;
1390	int rc = PGMPhysGCPtr2CCPtrReadOnly(pVCpu, GCPtrIDTE, (const void **)&pIDTE, &Lock);
1391	if (RT_SUCCESS(rc))
1392	{
1393	/*
1394	* Inner Loop: Iterate the data on this page looking for an entry equal to GCPtr.
1395	* N.B. Member of the Flat Earth Society...
1396	*/
1397	while (GCPtrIDTE <= GCPtrIDTELast)
1398	{
1399	if (pIDTE->Gen.u1Present)
1400	{
1401	RTRCPTR GCPtrHandler = VBOXIDTE_OFFSET(*pIDTE);
1402	if (GCPtr == GCPtrHandler)
1403	{
1404	PGMPhysReleasePageMappingLock(pVM, &Lock);
1405	return true;
1406	}
1407	}
1408
1409	/* next entry */
1410	if ((GCPtrIDTE & PAGE_OFFSET_MASK) + sizeof(VBOXIDTE) >= PAGE_SIZE)
1411	{
1412	AssertMsg(!(GCPtrIDTE & (sizeof(VBOXIDTE) - 1)),
1413	("IDT is crossing pages and it's not aligned! GCPtrIDTE=%#x cbIDT=%#x\n", GCPtrIDTE, cbIDT));
1414	GCPtrIDTE += sizeof(VBOXIDTE);
1415	break;
1416	}
1417	GCPtrIDTE += sizeof(VBOXIDTE);
1418	pIDTE++;
1419	}
1420	PGMPhysReleasePageMappingLock(pVM, &Lock);
1421	}
1422	else
1423	{
1424	/* Skip to the next page (if any). Take care not to wrap around the address space. */
1425	if ((GCPtrIDTELast >> PAGE_SHIFT) == (GCPtrIDTE >> PAGE_SHIFT))
1426	return false;
1427	GCPtrIDTE = RT_ALIGN_T(GCPtrIDTE, PAGE_SIZE, RTGCPTR) + PAGE_SIZE + (GCPtrIDTE & (sizeof(VBOXIDTE) - 1));
1428	}
1429	}
1430	return false;
1431	}
1432
1433
1434	/**
1435	* Inject event (such as external irq or trap)
1436	*
1437	* @returns VBox status code.
1438	* @param pVM The VM to operate on.
1439	* @param pVCpu The VMCPU to operate on.
1440	* @param enmEvent Trpm event type
1441	*/
1442	VMMR3DECL(int) TRPMR3InjectEvent(PVM pVM, PVMCPU pVCpu, TRPMEVENT enmEvent)
1443	{
1444	PCPUMCTX pCtx;
1445	int rc;
1446
1447	pCtx = CPUMQueryGuestCtxPtr(pVCpu);
1448	Assert(!PATMIsPatchGCAddr(pVM, pCtx->eip));
1449	Assert(!VMCPU_FF_ISSET(pVCpu, VMCPU_FF_INHIBIT_INTERRUPTS));
1450
1451	/* Currently only useful for external hardware interrupts. */
1452	Assert(enmEvent == TRPM_HARDWARE_INT);
1453
1454	if (REMR3QueryPendingInterrupt(pVM, pVCpu) == REM_NO_PENDING_IRQ)
1455	{
1456	#ifdef TRPM_FORWARD_TRAPS_IN_GC
1457
1458	# ifdef LOG_ENABLED
1459	DBGFR3InfoLog(pVM, "cpumguest", "TRPMInject");
1460	DBGFR3DisasInstrCurrentLog(pVCpu, "TRPMInject");
1461	# endif
1462
1463	uint8_t u8Interrupt;
1464	rc = PDMGetInterrupt(pVCpu, &u8Interrupt);
1465	Log(("TRPMR3InjectEvent: CPU%d u8Interrupt=%d (%#x) rc=%Rrc\n", pVCpu->idCpu, u8Interrupt, u8Interrupt, rc));
1466	if (RT_SUCCESS(rc))
1467	{
1468	if (HWACCMIsEnabled(pVM))
1469	{
1470	rc = TRPMAssertTrap(pVCpu, u8Interrupt, enmEvent);
1471	AssertRC(rc);
1472	STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1473	return HWACCMR3IsActive(pVCpu) ? VINF_EM_RESCHEDULE_HWACC : VINF_EM_RESCHEDULE_REM;
1474	}
1475	/* If the guest gate is not patched, then we will check (again) if we can patch it. */
1476	if (pVM->trpm.s.aGuestTrapHandler[u8Interrupt] == TRPM_INVALID_HANDLER)
1477	{
1478	CSAMR3CheckGates(pVM, u8Interrupt, 1);
1479	Log(("TRPMR3InjectEvent: recheck gate %x -> valid=%d\n", u8Interrupt, TRPMR3GetGuestTrapHandler(pVM, u8Interrupt) != TRPM_INVALID_HANDLER));
1480	}
1481
1482	if (pVM->trpm.s.aGuestTrapHandler[u8Interrupt] != TRPM_INVALID_HANDLER)
1483	{
1484	/* Must check pending forced actions as our IDT or GDT might be out of sync */
1485	rc = EMR3CheckRawForcedActions(pVM, pVCpu);
1486	if (rc == VINF_SUCCESS)
1487	{
1488	/* There's a handler -> let's execute it in raw mode */
1489	rc = TRPMForwardTrap(pVCpu, CPUMCTX2CORE(pCtx), u8Interrupt, 0, TRPM_TRAP_NO_ERRORCODE, enmEvent, -1);
1490	if (rc == VINF_SUCCESS /* Don't use RT_SUCCESS */)
1491	{
1492	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));
1493
1494	STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1495	return VINF_EM_RESCHEDULE_RAW;
1496	}
1497	}
1498	}
1499	else
1500	STAM_COUNTER_INC(&pVM->trpm.s.StatForwardFailNoHandler);
1501	REMR3NotifyPendingInterrupt(pVM, pVCpu, u8Interrupt);
1502	}
1503	else
1504	{
1505	AssertRC(rc);
1506	return HWACCMR3IsActive(pVCpu) ? VINF_EM_RESCHEDULE_HWACC : VINF_EM_RESCHEDULE_REM; /* (Heed the halted state if this is changed!) */
1507	}
1508	#else
1509	if (HWACCMR3IsActive(pVM))
1510	{
1511	uint8_t u8Interrupt;
1512	rc = PDMGetInterrupt(pVCpu, &u8Interrupt);
1513	Log(("TRPMR3InjectEvent: u8Interrupt=%d (%#x) rc=%Rrc\n", u8Interrupt, u8Interrupt, rc));
1514	if (RT_SUCCESS(rc))
1515	{
1516	rc = TRPMAssertTrap(pVM, u8Interrupt, TRPM_HARDWARE_INT);
1517	AssertRC(rc);
1518	STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1519	return VINF_EM_RESCHEDULE_HWACC;
1520	}
1521	}
1522	else
1523	AssertRC(rc);
1524	#endif
1525	}
1526	/** @todo check if it's safe to translate the patch address to the original guest address.
1527	* this implies a safe state in translated instructions and should take sti successors into account (instruction fusing)
1528	*/
1529	/* Note: if it's a PATM address, then we'll go back to raw mode regardless of the return code below. */
1530
1531	/* Fall back to the recompiler */
1532	return VINF_EM_RESCHEDULE_REM; /* (Heed the halted state if this is changed!) */
1533	}
1534

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source: vbox/trunk/src/VBox/VMM/TRPM.cpp@ 28800

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