TRPM.cpp@ 21895

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1	/* $Id: TRPM.cpp 20841 2009-06-23 14:45:16Z vboxsync $ */
2	/** @file
3	* TRPM - The Trap Monitor.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	* Clara, CA 95054 USA or visit http://www.sun.com if you need
19	* additional information or have any questions.
20	*/
21
22	/** @page pg_trpm TRPM - The Trap Monitor
23	*
24	* The Trap Monitor (TRPM) is responsible for all trap and interrupt handling in
25	* the VMM. It plays a major role in raw-mode execution and a lesser one in the
26	* hardware assisted mode.
27	*
28	* Note first, the following will use trap as a collective term for faults,
29	* aborts and traps.
30	*
31	* @see grp_trpm
32	*
33	*
34	* @section sec_trpm_rc Raw-Mode Context
35	*
36	* When executing in the raw-mode context, TRPM will be managing the IDT and
37	* processing all traps and interrupts. It will also monitor the guest IDT
38	* because CSAM wishes to know about changes to it (trap/interrupt/syscall
39	* handler patching) and TRPM needs to keep the #\BP gate in sync (ring-3
40	* considerations). See TRPMR3SyncIDT and CSAMR3CheckGates.
41	*
42	* External interrupts will be forwarded to the host context by the quickest
43	* possible route where they will be reasserted. The other events will be
44	* categorized into virtualization traps, genuine guest traps and hypervisor
45	* traps. The latter group may be recoverable depending on when they happen and
46	* whether there is a handler for it, otherwise it will cause a guru meditation.
47	*
48	* TRPM disgishishes the between the first two (virt and guest traps) and the
49	* latter (hyper) by checking the CPL of the trapping code, if CPL == 0 then
50	* it's a hyper trap otherwise it's a virt/guest trap. There are three trap
51	* dispatcher tables, one ad-hoc for one time traps registered via
52	* TRPMGCSetTempHandler(), one for hyper traps and one for virt/guest traps.
53	* The latter two live in TRPMGCHandlersA.asm, the former in the VM structure.
54	*
55	* The raw-mode context trap handlers found in TRPMGCHandlers.cpp (for the most
56	* part), will call up the other VMM sub-systems depending on what it things
57	* happens. The two most busy traps are page faults (\#PF) and general
58	* protection fault/trap (\#GP).
59	*
60	* Before resuming guest code after having taken a virtualization trap or
61	* injected a guest trap, TRPM will check for pending forced action and
62	* every now and again let TM check for timed out timers. This allows code that
63	* is being executed as part of virtualization traps to signal ring-3 exits,
64	* page table resyncs and similar without necessarily using the status code. It
65	* also make sure we're more responsive to timers and requests from other
66	* threads (necessarily running on some different core/cpu in most cases).
67	*
68	*
69	* @section sec_trpm_all All Contexts
70	*
71	* TRPM will also dispatch / inject interrupts and traps to the guest, both when
72	* in raw-mode and when in hardware assisted mode. See TRPMInject().
73	*
74	*/
75
76	/*******************************************************************************
77	* Header Files *
78	*******************************************************************************/
79	#define LOG_GROUP LOG_GROUP_TRPM
80	#include <VBox/trpm.h>
81	#include <VBox/cpum.h>
82	#include <VBox/selm.h>
83	#include <VBox/ssm.h>
84	#include <VBox/pdmapi.h>
85	#include <VBox/pgm.h>
86	#include <VBox/dbgf.h>
87	#include <VBox/mm.h>
88	#include <VBox/stam.h>
89	#include <VBox/csam.h>
90	#include <VBox/patm.h>
91	#include "TRPMInternal.h"
92	#include <VBox/vm.h>
93	#include <VBox/em.h>
94	#include <VBox/rem.h>
95	#include <VBox/hwaccm.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 u32Version);
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 The VM to operate on.
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, trpmR3Save, NULL,
511	NULL, trpmR3Load, NULL);
512	if (RT_FAILURE(rc))
513	return rc;
514
515	/*
516	* Statistics.
517	*/
518	STAM_REG(pVM, &pVM->trpm.s.StatRCWriteGuestIDTFault, STAMTYPE_COUNTER, "/TRPM/RC/IDTWritesFault", STAMUNIT_OCCURENCES, "Guest IDT writes the we returned to R3 to handle.");
519	STAM_REG(pVM, &pVM->trpm.s.StatRCWriteGuestIDTHandled, STAMTYPE_COUNTER, "/TRPM/RC/IDTWritesHandled", STAMUNIT_OCCURENCES, "Guest IDT writes that we handled successfully.");
520	STAM_REG(pVM, &pVM->trpm.s.StatSyncIDT, STAMTYPE_PROFILE, "/PROF/TRPM/SyncIDT", STAMUNIT_TICKS_PER_CALL, "Profiling of TRPMR3SyncIDT().");
521
522	/* traps */
523	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x00], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/00", STAMUNIT_TICKS_PER_CALL, "#DE - Divide error.");
524	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).");
525	//STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x02], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/02", STAMUNIT_TICKS_PER_CALL, "NMI");
526	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x03], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/03", STAMUNIT_TICKS_PER_CALL, "#BP - Breakpoint.");
527	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x04], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/04", STAMUNIT_TICKS_PER_CALL, "#OF - Overflow.");
528	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x05], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/05", STAMUNIT_TICKS_PER_CALL, "#BR - Bound range exceeded.");
529	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x06], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/06", STAMUNIT_TICKS_PER_CALL, "#UD - Undefined opcode.");
530	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x07], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/07", STAMUNIT_TICKS_PER_CALL, "#NM - Device not available (FPU).");
531	//STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x08], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/08", STAMUNIT_TICKS_PER_CALL, "#DF - Double fault.");
532	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x09], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/09", STAMUNIT_TICKS_PER_CALL, "#?? - Coprocessor segment overrun (obsolete).");
533	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0a], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0a", STAMUNIT_TICKS_PER_CALL, "#TS - Task switch fault.");
534	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0b], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0b", STAMUNIT_TICKS_PER_CALL, "#NP - Segemnt not present.");
535	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0c], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0c", STAMUNIT_TICKS_PER_CALL, "#SS - Stack segment fault.");
536	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0d], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0d", STAMUNIT_TICKS_PER_CALL, "#GP - General protection fault.");
537	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0e], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0e", STAMUNIT_TICKS_PER_CALL, "#PF - Page fault.");
538	//STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0f], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0f", STAMUNIT_TICKS_PER_CALL, "Reserved.");
539	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x10], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/10", STAMUNIT_TICKS_PER_CALL, "#MF - Math fault..");
540	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x11], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/11", STAMUNIT_TICKS_PER_CALL, "#AC - Alignment check.");
541	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x12], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/12", STAMUNIT_TICKS_PER_CALL, "#MC - Machine check.");
542	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x13], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/13", STAMUNIT_TICKS_PER_CALL, "#XF - SIMD Floating-Point Exception.");
543
544	#ifdef VBOX_WITH_STATISTICS
545	rc = MMHyperAlloc(pVM, sizeof(STAMCOUNTER) * 255, 8, MM_TAG_STAM, (void **)&pVM->trpm.s.paStatForwardedIRQR3);
546	AssertRCReturn(rc, rc);
547	pVM->trpm.s.paStatForwardedIRQRC = MMHyperR3ToRC(pVM, pVM->trpm.s.paStatForwardedIRQR3);
548	pVM->trpm.s.paStatForwardedIRQR0 = MMHyperR3ToR0(pVM, pVM->trpm.s.paStatForwardedIRQR3);
549	for (unsigned i = 0; i < 255; i++)
550	STAMR3RegisterF(pVM, &pVM->trpm.s.paStatForwardedIRQR3[i], STAMTYPE_COUNTER, STAMVISIBILITY_USED, STAMUNIT_OCCURENCES, "Forwarded interrupts.",
551	i < 0x20 ? "/TRPM/ForwardRaw/TRAP/%02X" : "/TRPM/ForwardRaw/IRQ/%02X", i);
552	#endif
553
554	STAM_REG(pVM, &pVM->trpm.s.StatForwardProfR3, STAMTYPE_PROFILE_ADV, "/TRPM/ForwardRaw/ProfR3", STAMUNIT_TICKS_PER_CALL, "Profiling TRPMForwardTrap.");
555	STAM_REG(pVM, &pVM->trpm.s.StatForwardProfRZ, STAMTYPE_PROFILE_ADV, "/TRPM/ForwardRaw/ProfRZ", STAMUNIT_TICKS_PER_CALL, "Profiling TRPMForwardTrap.");
556	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailNoHandler, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/FailNoHandler", STAMUNIT_OCCURENCES,"Failure to forward interrupt in raw mode.");
557	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailPatchAddr, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/FailPatchAddr", STAMUNIT_OCCURENCES,"Failure to forward interrupt in raw mode.");
558	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailR3, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/FailR3", STAMUNIT_OCCURENCES, "Failure to forward interrupt in raw mode.");
559	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailRZ, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/FailRZ", STAMUNIT_OCCURENCES, "Failure to forward interrupt in raw mode.");
560
561	STAM_REG(pVM, &pVM->trpm.s.StatTrap0dDisasm, STAMTYPE_PROFILE, "/TRPM/RC/Traps/0d/Disasm", STAMUNIT_TICKS_PER_CALL, "Profiling disassembly part of trpmGCTrap0dHandler.");
562	STAM_REG(pVM, &pVM->trpm.s.StatTrap0dRdTsc, STAMTYPE_COUNTER, "/TRPM/RC/Traps/0d/RdTsc", STAMUNIT_OCCURENCES, "Number of RDTSC #GPs.");
563
564	/*
565	* Default action when entering raw mode for the first time
566	*/
567	PVMCPU pVCpu = &pVM->aCpus[0]; /* raw mode implies on VCPU */
568	VMCPU_FF_SET(pVCpu, VMCPU_FF_TRPM_SYNC_IDT);
569	return 0;
570	}
571
572
573	/**
574	* Applies relocations to data and code managed by this component.
575	*
576	* This function will be called at init and whenever the VMM need
577	* to relocate itself inside the GC.
578	*
579	* @param pVM The VM handle.
580	* @param offDelta Relocation delta relative to old location.
581	*/
582	VMMR3DECL(void) TRPMR3Relocate(PVM pVM, RTGCINTPTR offDelta)
583	{
584	/* Only applies to raw mode which supports only 1 VCPU. */
585	PVMCPU pVCpu = &pVM->aCpus[0];
586
587	LogFlow(("TRPMR3Relocate\n"));
588	/*
589	* Get the trap handler addresses.
590	*
591	* If VMMGC.gc is screwed, so are we. We'll assert here since it elsewise
592	* would make init order impossible if we should assert the presence of these
593	* exports in TRPMR3Init().
594	*/
595	RTRCPTR aRCPtrs[TRPM_HANDLER_MAX] = {0};
596	int rc;
597	rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerInterupt", &aRCPtrs[TRPM_HANDLER_INT]);
598	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerInterupt in VMMGC.gc!\n"));
599
600	rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerGeneric", &aRCPtrs[TRPM_HANDLER_TRAP]);
601	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerGeneric in VMMGC.gc!\n"));
602
603	rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerTrap08", &aRCPtrs[TRPM_HANDLER_TRAP_08]);
604	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerTrap08 in VMMGC.gc!\n"));
605
606	rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerTrap12", &aRCPtrs[TRPM_HANDLER_TRAP_12]);
607	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerTrap12 in VMMGC.gc!\n"));
608
609	RTSEL SelCS = CPUMGetHyperCS(pVCpu);
610
611	/*
612	* Iterate the idt and set the addresses.
613	*/
614	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[0];
615	PVBOXIDTE_GENERIC pIdteTemplate = &g_aIdt[0];
616	for (unsigned i = 0; i < RT_ELEMENTS(pVM->trpm.s.aIdt); i++, pIdte++, pIdteTemplate++)
617	{
618	if ( pIdte->Gen.u1Present
619	&& !ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], i)
620	)
621	{
622	Assert(pIdteTemplate->u16OffsetLow < TRPM_HANDLER_MAX);
623	RTGCPTR Offset = aRCPtrs[pIdteTemplate->u16OffsetLow];
624	switch (pIdteTemplate->u16OffsetLow)
625	{
626	/*
627	* Generic handlers have different entrypoints for each possible
628	* vector number. These entrypoints makes a sort of an array with
629	* 8 byte entries where the vector number is the index.
630	* See TRPMGCHandlersA.asm for details.
631	*/
632	case TRPM_HANDLER_INT:
633	case TRPM_HANDLER_TRAP:
634	Offset += i * 8;
635	break;
636	case TRPM_HANDLER_TRAP_12:
637	break;
638	case TRPM_HANDLER_TRAP_08:
639	/* Handle #DF Task Gate in special way. */
640	pIdte->Gen.u16SegSel = SELMGetTrap8Selector(pVM);
641	pIdte->Gen.u16OffsetLow = 0;
642	pIdte->Gen.u16OffsetHigh = 0;
643	SELMSetTrap8EIP(pVM, Offset);
644	continue;
645	}
646	/* (non-task gates only ) */
647	pIdte->Gen.u16OffsetLow = Offset & 0xffff;
648	pIdte->Gen.u16OffsetHigh = Offset >> 16;
649	pIdte->Gen.u16SegSel = SelCS;
650	}
651	}
652
653	/*
654	* Update IDTR (limit is including!).
655	*/
656	CPUMSetHyperIDTR(pVCpu, VM_RC_ADDR(pVM, &pVM->trpm.s.aIdt[0]), sizeof(pVM->trpm.s.aIdt)-1);
657
658	if (!pVM->trpm.s.fDisableMonitoring)
659	{
660	#ifdef TRPM_TRACK_SHADOW_IDT_CHANGES
661	if (pVM->trpm.s.pvMonShwIdtRC != RTRCPTR_MAX)
662	{
663	rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.pvMonShwIdtRC);
664	AssertRC(rc);
665	}
666	pVM->trpm.s.pvMonShwIdtRC = VM_RC_ADDR(pVM, &pVM->trpm.s.aIdt[0]);
667	rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_HYPERVISOR, pVM->trpm.s.pvMonShwIdtRC, pVM->trpm.s.pvMonShwIdtRC + sizeof(pVM->trpm.s.aIdt) - 1,
668	0, 0, "trpmRCShadowIDTWriteHandler", 0, "Shadow IDT write access handler");
669	AssertRC(rc);
670	#endif
671	}
672
673	/* Relocate IDT handlers for forwarding guest traps/interrupts. */
674	for (uint32_t iTrap = 0; iTrap < RT_ELEMENTS(pVM->trpm.s.aGuestTrapHandler); iTrap++)
675	{
676	if (pVM->trpm.s.aGuestTrapHandler[iTrap] != TRPM_INVALID_HANDLER)
677	{
678	Log(("TRPMR3Relocate: iGate=%2X Handler %RRv -> %RRv\n", iTrap, pVM->trpm.s.aGuestTrapHandler[iTrap], pVM->trpm.s.aGuestTrapHandler[iTrap] + offDelta));
679	pVM->trpm.s.aGuestTrapHandler[iTrap] += offDelta;
680	}
681
682	if (ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], iTrap))
683	{
684	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
685	RTGCPTR pHandler = VBOXIDTE_OFFSET(*pIdte);
686
687	Log(("TRPMR3Relocate: *iGate=%2X Handler %RGv -> %RGv\n", iTrap, pHandler, pHandler + offDelta));
688	pHandler += offDelta;
689
690	pIdte->Gen.u16OffsetHigh = pHandler >> 16;
691	pIdte->Gen.u16OffsetLow = pHandler & 0xFFFF;
692
693	}
694	}
695
696	#ifdef VBOX_WITH_STATISTICS
697	pVM->trpm.s.paStatForwardedIRQRC += offDelta;
698	pVM->trpm.s.paStatForwardedIRQR0 = MMHyperR3ToR0(pVM, pVM->trpm.s.paStatForwardedIRQR3);
699	#endif
700	}
701
702
703	/**
704	* Terminates the Trap Manager
705	*
706	* @returns VBox status code.
707	* @param pVM The VM to operate on.
708	*/
709	VMMR3DECL(int) TRPMR3Term(PVM pVM)
710	{
711	NOREF(pVM);
712	return 0;
713	}
714
715
716	/**
717	* The VM is being reset.
718	*
719	* For the TRPM component this means that any IDT write monitors
720	* needs to be removed, any pending trap cleared, and the IDT reset.
721	*
722	* @param pVM VM handle.
723	*/
724	VMMR3DECL(void) TRPMR3Reset(PVM pVM)
725	{
726	/*
727	* Deregister any virtual handlers.
728	*/
729	#ifdef TRPM_TRACK_GUEST_IDT_CHANGES
730	if (pVM->trpm.s.GuestIdtr.pIdt != RTRCPTR_MAX)
731	{
732	if (!pVM->trpm.s.fSafeToDropGuestIDTMonitoring)
733	{
734	int rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GuestIdtr.pIdt);
735	AssertRC(rc);
736	}
737	pVM->trpm.s.GuestIdtr.pIdt = RTRCPTR_MAX;
738	}
739	pVM->trpm.s.GuestIdtr.cbIdt = 0;
740	#endif
741
742	/*
743	* Reinitialize other members calling the relocator to get things right.
744	*/
745	for (unsigned i=0;i<pVM->cCPUs;i++)
746	{
747	PVMCPU pVCpu = &pVM->aCpus[i];
748	pVCpu->trpm.s.uActiveVector = ~0;
749	}
750	memcpy(&pVM->trpm.s.aIdt[0], &g_aIdt[0], sizeof(pVM->trpm.s.aIdt));
751	memset(pVM->trpm.s.aGuestTrapHandler, 0, sizeof(pVM->trpm.s.aGuestTrapHandler));
752	TRPMR3Relocate(pVM, 0);
753
754	/*
755	* Default action when entering raw mode for the first time
756	*/
757	PVMCPU pVCpu = &pVM->aCpus[0]; /* raw mode implies on VCPU */
758	VMCPU_FF_SET(pVCpu, VMCPU_FF_TRPM_SYNC_IDT);
759	}
760
761
762	/**
763	* Execute state save operation.
764	*
765	* @returns VBox status code.
766	* @param pVM VM Handle.
767	* @param pSSM SSM operation handle.
768	*/
769	static DECLCALLBACK(int) trpmR3Save(PVM pVM, PSSMHANDLE pSSM)
770	{
771	PTRPM pTrpm = &pVM->trpm.s;
772	LogFlow(("trpmR3Save:\n"));
773
774	/*
775	* Active and saved traps.
776	*/
777	for (unsigned i=0;i<pVM->cCPUs;i++)
778	{
779	PTRPMCPU pTrpmCpu = &pVM->aCpus[i].trpm.s;
780
781	SSMR3PutUInt(pSSM, pTrpmCpu->uActiveVector);
782	SSMR3PutUInt(pSSM, pTrpmCpu->enmActiveType);
783	SSMR3PutGCUInt(pSSM, pTrpmCpu->uActiveErrorCode);
784	SSMR3PutGCUIntPtr(pSSM, pTrpmCpu->uActiveCR2);
785	SSMR3PutGCUInt(pSSM, pTrpmCpu->uSavedVector);
786	SSMR3PutUInt(pSSM, pTrpmCpu->enmSavedType);
787	SSMR3PutGCUInt(pSSM, pTrpmCpu->uSavedErrorCode);
788	SSMR3PutGCUIntPtr(pSSM, pTrpmCpu->uSavedCR2);
789	SSMR3PutGCUInt(pSSM, pTrpmCpu->uPrevVector);
790	}
791	SSMR3PutBool(pSSM, pTrpm->fDisableMonitoring);
792	PVMCPU pVCpu = &pVM->aCpus[0]; /* raw mode implies 1 VCPU */
793	SSMR3PutUInt(pSSM, VMCPU_FF_ISSET(pVCpu, VMCPU_FF_TRPM_SYNC_IDT));
794	SSMR3PutMem(pSSM, &pTrpm->au32IdtPatched[0], sizeof(pTrpm->au32IdtPatched));
795	SSMR3PutU32(pSSM, ~0); /* separator. */
796
797	/*
798	* Save any trampoline gates.
799	*/
800	for (uint32_t iTrap = 0; iTrap < RT_ELEMENTS(pTrpm->aGuestTrapHandler); iTrap++)
801	{
802	if (pTrpm->aGuestTrapHandler[iTrap])
803	{
804	SSMR3PutU32(pSSM, iTrap);
805	SSMR3PutGCPtr(pSSM, pTrpm->aGuestTrapHandler[iTrap]);
806	SSMR3PutMem(pSSM, &pTrpm->aIdt[iTrap], sizeof(pTrpm->aIdt[iTrap]));
807	}
808	}
809
810	return SSMR3PutU32(pSSM, ~0); /* terminator */
811	}
812
813
814	/**
815	* Execute state load operation.
816	*
817	* @returns VBox status code.
818	* @param pVM VM Handle.
819	* @param pSSM SSM operation handle.
820	* @param u32Version Data layout version.
821	*/
822	static DECLCALLBACK(int) trpmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version)
823	{
824	LogFlow(("trpmR3Load:\n"));
825
826	/*
827	* Validate version.
828	*/
829	if ( u32Version != TRPM_SAVED_STATE_VERSION
830	&& u32Version != TRPM_SAVED_STATE_VERSION_UNI)
831	{
832	AssertMsgFailed(("trpmR3Load: Invalid version u32Version=%d!\n", u32Version));
833	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
834	}
835
836	/*
837	* Call the reset function to kick out any handled gates and other potential trouble.
838	*/
839	TRPMR3Reset(pVM);
840
841	/*
842	* Active and saved traps.
843	*/
844	PTRPM pTrpm = &pVM->trpm.s;
845
846	if (u32Version == TRPM_SAVED_STATE_VERSION)
847	{
848	for (unsigned i=0;i<pVM->cCPUs;i++)
849	{
850	PTRPMCPU pTrpmCpu = &pVM->aCpus[i].trpm.s;
851	SSMR3GetUInt(pSSM, &pTrpmCpu->uActiveVector);
852	SSMR3GetUInt(pSSM, (uint32_t *)&pTrpmCpu->enmActiveType);
853	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uActiveErrorCode);
854	SSMR3GetGCUIntPtr(pSSM, &pTrpmCpu->uActiveCR2);
855	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uSavedVector);
856	SSMR3GetUInt(pSSM, (uint32_t *)&pTrpmCpu->enmSavedType);
857	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uSavedErrorCode);
858	SSMR3GetGCUIntPtr(pSSM, &pTrpmCpu->uSavedCR2);
859	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uPrevVector);
860	}
861
862	SSMR3GetBool(pSSM, &pVM->trpm.s.fDisableMonitoring);
863	}
864	else
865	{
866	PTRPMCPU pTrpmCpu = &pVM->aCpus[0].trpm.s;
867	SSMR3GetUInt(pSSM, &pTrpmCpu->uActiveVector);
868	SSMR3GetUInt(pSSM, (uint32_t *)&pTrpmCpu->enmActiveType);
869	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uActiveErrorCode);
870	SSMR3GetGCUIntPtr(pSSM, &pTrpmCpu->uActiveCR2);
871	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uSavedVector);
872	SSMR3GetUInt(pSSM, (uint32_t *)&pTrpmCpu->enmSavedType);
873	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uSavedErrorCode);
874	SSMR3GetGCUIntPtr(pSSM, &pTrpmCpu->uSavedCR2);
875	SSMR3GetGCUInt(pSSM, &pTrpmCpu->uPrevVector);
876
877	RTGCUINT fDisableMonitoring;
878	SSMR3GetGCUInt(pSSM, &fDisableMonitoring);
879	pTrpm->fDisableMonitoring = !!fDisableMonitoring;
880	}
881
882	RTUINT fSyncIDT;
883	int rc = SSMR3GetUInt(pSSM, &fSyncIDT);
884	if (RT_FAILURE(rc))
885	return rc;
886	if (fSyncIDT & ~1)
887	{
888	AssertMsgFailed(("fSyncIDT=%#x\n", fSyncIDT));
889	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
890	}
891	if (fSyncIDT)
892	{
893	PVMCPU pVCpu = &pVM->aCpus[0]; /* raw mode implies 1 VCPU */
894	VMCPU_FF_SET(pVCpu, VMCPU_FF_TRPM_SYNC_IDT);
895	}
896	/* else: cleared by reset call above. */
897
898	SSMR3GetMem(pSSM, &pTrpm->au32IdtPatched[0], sizeof(pTrpm->au32IdtPatched));
899
900	/* check the separator */
901	uint32_t u32Sep;
902	rc = SSMR3GetU32(pSSM, &u32Sep);
903	if (RT_FAILURE(rc))
904	return rc;
905	if (u32Sep != (uint32_t)~0)
906	{
907	AssertMsgFailed(("u32Sep=%#x (first)\n", u32Sep));
908	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
909	}
910
911	/*
912	* Restore any trampoline gates.
913	*/
914	for (;;)
915	{
916	/* gate number / terminator */
917	uint32_t iTrap;
918	rc = SSMR3GetU32(pSSM, &iTrap);
919	if (RT_FAILURE(rc))
920	return rc;
921	if (iTrap == (uint32_t)~0)
922	break;
923	if ( iTrap >= RT_ELEMENTS(pTrpm->aIdt)
924	\|\| pTrpm->aGuestTrapHandler[iTrap])
925	{
926	AssertMsgFailed(("iTrap=%#x\n", iTrap));
927	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
928	}
929
930	/* restore the IDT entry. */
931	RTGCPTR GCPtrHandler;
932	SSMR3GetGCPtr(pSSM, &GCPtrHandler);
933	VBOXIDTE Idte;
934	rc = SSMR3GetMem(pSSM, &Idte, sizeof(Idte));
935	if (RT_FAILURE(rc))
936	return rc;
937	Assert(GCPtrHandler);
938	pTrpm->aIdt[iTrap] = Idte;
939	}
940
941	return VINF_SUCCESS;
942	}
943
944
945	/**
946	* Check if gate handlers were updated
947	* (callback for the VMCPU_FF_TRPM_SYNC_IDT forced action).
948	*
949	* @returns VBox status code.
950	* @param pVM The VM handle.
951	* @param pVCpu The VMCPU handle.
952	*/
953	VMMR3DECL(int) TRPMR3SyncIDT(PVM pVM, PVMCPU pVCpu)
954	{
955	STAM_PROFILE_START(&pVM->trpm.s.StatSyncIDT, a);
956	const bool fRawRing0 = EMIsRawRing0Enabled(pVM);
957	int rc;
958
959	if (pVM->trpm.s.fDisableMonitoring)
960	{
961	VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_TRPM_SYNC_IDT);
962	return VINF_SUCCESS; /* Nothing to do */
963	}
964
965	if (fRawRing0 && CSAMIsEnabled(pVM))
966	{
967	/* Clear all handlers */
968	Log(("TRPMR3SyncIDT: Clear all trap handlers.\n"));
969	/** @todo inefficient, but simple */
970	for (unsigned iGate = 0; iGate < 256; iGate++)
971	trpmClearGuestTrapHandler(pVM, iGate);
972
973	/* Scan them all (only the first time) */
974	CSAMR3CheckGates(pVM, 0, 256);
975	}
976
977	/*
978	* Get the IDTR.
979	*/
980	VBOXIDTR IDTR;
981	IDTR.pIdt = CPUMGetGuestIDTR(pVCpu, &IDTR.cbIdt);
982	if (!IDTR.cbIdt)
983	{
984	Log(("No IDT entries...\n"));
985	return DBGFSTOP(pVM);
986	}
987
988	#ifdef TRPM_TRACK_GUEST_IDT_CHANGES
989	/*
990	* Check if Guest's IDTR has changed.
991	*/
992	if ( IDTR.pIdt != pVM->trpm.s.GuestIdtr.pIdt
993	\|\| IDTR.cbIdt != pVM->trpm.s.GuestIdtr.cbIdt)
994	{
995	Log(("TRPMR3UpdateFromCPUM: Guest's IDT is changed to pIdt=%08X cbIdt=%08X\n", IDTR.pIdt, IDTR.cbIdt));
996	if (!pVM->trpm.s.fSafeToDropGuestIDTMonitoring)
997	{
998	/*
999	* [Re]Register write virtual handler for guest's IDT.
1000	*/
1001	if (pVM->trpm.s.GuestIdtr.pIdt != RTRCPTR_MAX)
1002	{
1003	rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GuestIdtr.pIdt);
1004	AssertRCReturn(rc, rc);
1005	}
1006	/* limit is including */
1007	rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_WRITE, IDTR.pIdt, IDTR.pIdt + IDTR.cbIdt /* already inclusive */,
1008	0, trpmR3GuestIDTWriteHandler, "trpmRCGuestIDTWriteHandler", 0, "Guest IDT write access handler");
1009
1010	if (rc == VERR_PGM_HANDLER_VIRTUAL_CONFLICT)
1011	{
1012	/* Could be a conflict with CSAM */
1013	CSAMR3RemovePage(pVM, IDTR.pIdt);
1014	if (PAGE_ADDRESS(IDTR.pIdt) != PAGE_ADDRESS(IDTR.pIdt + IDTR.cbIdt))
1015	CSAMR3RemovePage(pVM, IDTR.pIdt + IDTR.cbIdt);
1016
1017	rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_WRITE, IDTR.pIdt, IDTR.pIdt + IDTR.cbIdt /* already inclusive */,
1018	0, trpmR3GuestIDTWriteHandler, "trpmRCGuestIDTWriteHandler", 0, "Guest IDT write access handler");
1019	}
1020
1021	AssertRCReturn(rc, rc);
1022	}
1023
1024	/* Update saved Guest IDTR. */
1025	pVM->trpm.s.GuestIdtr = IDTR;
1026	}
1027	#endif
1028
1029	/*
1030	* Sync the interrupt gate.
1031	* Should probably check/sync the others too, but for now we'll handle that in #GP.
1032	*/
1033	X86DESC Idte3;
1034	rc = PGMPhysSimpleReadGCPtr(pVCpu, &Idte3, IDTR.pIdt + sizeof(Idte3) * 3, sizeof(Idte3));
1035	if (RT_FAILURE(rc))
1036	{
1037	AssertMsgRC(rc, ("Failed to read IDT[3]! rc=%Rrc\n", rc));
1038	return DBGFSTOP(pVM);
1039	}
1040	AssertRCReturn(rc, rc);
1041	if (fRawRing0)
1042	pVM->trpm.s.aIdt[3].Gen.u2DPL = RT_MAX(Idte3.Gen.u2Dpl, 1);
1043	else
1044	pVM->trpm.s.aIdt[3].Gen.u2DPL = Idte3.Gen.u2Dpl;
1045
1046	/*
1047	* Clear the FF and we're done.
1048	*/
1049	VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_TRPM_SYNC_IDT);
1050	STAM_PROFILE_STOP(&pVM->trpm.s.StatSyncIDT, a);
1051	return VINF_SUCCESS;
1052	}
1053
1054
1055	/**
1056	* Disable IDT monitoring and syncing
1057	*
1058	* @param pVM The VM to operate on.
1059	*/
1060	VMMR3DECL(void) TRPMR3DisableMonitoring(PVM pVM)
1061	{
1062	/*
1063	* Deregister any virtual handlers.
1064	*/
1065	#ifdef TRPM_TRACK_GUEST_IDT_CHANGES
1066	if (pVM->trpm.s.GuestIdtr.pIdt != RTRCPTR_MAX)
1067	{
1068	if (!pVM->trpm.s.fSafeToDropGuestIDTMonitoring)
1069	{
1070	int rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GuestIdtr.pIdt);
1071	AssertRC(rc);
1072	}
1073	pVM->trpm.s.GuestIdtr.pIdt = RTRCPTR_MAX;
1074	}
1075	pVM->trpm.s.GuestIdtr.cbIdt = 0;
1076	#endif
1077
1078	#ifdef TRPM_TRACK_SHADOW_IDT_CHANGES
1079	if (pVM->trpm.s.pvMonShwIdtRC != RTRCPTR_MAX)
1080	{
1081	int rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.pvMonShwIdtRC);
1082	AssertRC(rc);
1083	pVM->trpm.s.pvMonShwIdtRC = RTRCPTR_MAX;
1084	}
1085	#endif
1086
1087	PVMCPU pVCpu = &pVM->aCpus[0]; /* raw mode implies on VCPU */
1088	VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_TRPM_SYNC_IDT);
1089
1090	pVM->trpm.s.fDisableMonitoring = true;
1091	}
1092
1093
1094	/**
1095	* \#PF Handler callback for virtual access handler ranges.
1096	*
1097	* Important to realize that a physical page in a range can have aliases, and
1098	* for ALL and WRITE handlers these will also trigger.
1099	*
1100	* @returns VINF_SUCCESS if the handler have carried out the operation.
1101	* @returns VINF_PGM_HANDLER_DO_DEFAULT if the caller should carry out the access operation.
1102	* @param pVM VM Handle.
1103	* @param GCPtr The virtual address the guest is writing to. (not correct if it's an alias!)
1104	* @param pvPtr The HC mapping of that address.
1105	* @param pvBuf What the guest is reading/writing.
1106	* @param cbBuf How much it's reading/writing.
1107	* @param enmAccessType The access type.
1108	* @param pvUser User argument.
1109	*/
1110	static DECLCALLBACK(int) trpmR3GuestIDTWriteHandler(PVM pVM, RTGCPTR GCPtr, void pvPtr, void pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser)
1111	{
1112	Assert(enmAccessType == PGMACCESSTYPE_WRITE);
1113	Log(("trpmR3GuestIDTWriteHandler: write to %RGv size %d\n", GCPtr, cbBuf));
1114	VMCPU_FF_SET(VMMGetCpu(pVM), VMCPU_FF_TRPM_SYNC_IDT);
1115	return VINF_PGM_HANDLER_DO_DEFAULT;
1116	}
1117
1118
1119	/**
1120	* Clear passthrough interrupt gate handler (reset to default handler)
1121	*
1122	* @returns VBox status code.
1123	* @param pVM The VM to operate on.
1124	* @param iTrap Trap/interrupt gate number.
1125	*/
1126	VMMR3DECL(int) trpmR3ClearPassThroughHandler(PVM pVM, unsigned iTrap)
1127	{
1128	/* Only applies to raw mode which supports only 1 VCPU. */
1129	PVMCPU pVCpu = &pVM->aCpus[0];
1130
1131	/** @todo cleanup trpmR3ClearPassThroughHandler()! */
1132	RTRCPTR aGCPtrs[TRPM_HANDLER_MAX];
1133	int rc;
1134
1135	memset(aGCPtrs, 0, sizeof(aGCPtrs));
1136
1137	rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerInterupt", &aGCPtrs[TRPM_HANDLER_INT]);
1138	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerInterupt in VMMGC.gc!\n"));
1139
1140	if ( iTrap < TRPM_HANDLER_INT_BASE
1141	\|\| iTrap >= RT_ELEMENTS(pVM->trpm.s.aIdt))
1142	{
1143	AssertMsg(iTrap < TRPM_HANDLER_INT_BASE, ("Illegal gate number %#x!\n", iTrap));
1144	return VERR_INVALID_PARAMETER;
1145	}
1146	memcpy(&pVM->trpm.s.aIdt[iTrap], &g_aIdt[iTrap], sizeof(pVM->trpm.s.aIdt[0]));
1147
1148	/* Unmark it for relocation purposes. */
1149	ASMBitClear(&pVM->trpm.s.au32IdtPatched[0], iTrap);
1150
1151	RTSEL SelCS = CPUMGetHyperCS(pVCpu);
1152	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
1153	PVBOXIDTE_GENERIC pIdteTemplate = &g_aIdt[iTrap];
1154	if (pIdte->Gen.u1Present)
1155	{
1156	Assert(pIdteTemplate->u16OffsetLow == TRPM_HANDLER_INT);
1157	Assert(sizeof(RTRCPTR) == sizeof(aGCPtrs[0]));
1158	RTRCPTR Offset = (RTRCPTR)aGCPtrs[pIdteTemplate->u16OffsetLow];
1159
1160	/*
1161	* Generic handlers have different entrypoints for each possible
1162	* vector number. These entrypoints make a sort of an array with
1163	* 8 byte entries where the vector number is the index.
1164	* See TRPMGCHandlersA.asm for details.
1165	*/
1166	Offset += iTrap * 8;
1167
1168	if (pIdte->Gen.u5Type2 != VBOX_IDTE_TYPE2_TASK)
1169	{
1170	pIdte->Gen.u16OffsetLow = Offset & 0xffff;
1171	pIdte->Gen.u16OffsetHigh = Offset >> 16;
1172	pIdte->Gen.u16SegSel = SelCS;
1173	}
1174	}
1175
1176	return VINF_SUCCESS;
1177	}
1178
1179
1180	/**
1181	* Check if address is a gate handler (interrupt or trap).
1182	*
1183	* @returns gate nr or ~0 is not found
1184	*
1185	* @param pVM VM handle.
1186	* @param GCPtr GC address to check.
1187	*/
1188	VMMR3DECL(uint32_t) TRPMR3QueryGateByHandler(PVM pVM, RTRCPTR GCPtr)
1189	{
1190	for (uint32_t iTrap = 0; iTrap < RT_ELEMENTS(pVM->trpm.s.aGuestTrapHandler); iTrap++)
1191	{
1192	if (pVM->trpm.s.aGuestTrapHandler[iTrap] == GCPtr)
1193	return iTrap;
1194
1195	/* redundant */
1196	if (ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], iTrap))
1197	{
1198	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
1199	RTGCPTR pHandler = VBOXIDTE_OFFSET(*pIdte);
1200
1201	if (pHandler == GCPtr)
1202	return iTrap;
1203	}
1204	}
1205	return ~0;
1206	}
1207
1208
1209	/**
1210	* Get guest trap/interrupt gate handler
1211	*
1212	* @returns Guest trap handler address or TRPM_INVALID_HANDLER if none installed
1213	* @param pVM The VM to operate on.
1214	* @param iTrap Interrupt/trap number.
1215	*/
1216	VMMR3DECL(RTRCPTR) TRPMR3GetGuestTrapHandler(PVM pVM, unsigned iTrap)
1217	{
1218	AssertReturn(iTrap < RT_ELEMENTS(pVM->trpm.s.aIdt), TRPM_INVALID_HANDLER);
1219
1220	return pVM->trpm.s.aGuestTrapHandler[iTrap];
1221	}
1222
1223
1224	/**
1225	* Set guest trap/interrupt gate handler
1226	* Used for setting up trap gates used for kernel calls.
1227	*
1228	* @returns VBox status code.
1229	* @param pVM The VM to operate on.
1230	* @param iTrap Interrupt/trap number.
1231	* @param pHandler GC handler pointer
1232	*/
1233	VMMR3DECL(int) TRPMR3SetGuestTrapHandler(PVM pVM, unsigned iTrap, RTRCPTR pHandler)
1234	{
1235	/* Only valid in raw mode which implies 1 VCPU */
1236	Assert(PATMIsEnabled(pVM) && pVM->cCPUs == 1);
1237	PVMCPU pVCpu = &pVM->aCpus[0];
1238
1239	/*
1240	* Validate.
1241	*/
1242	if (iTrap >= RT_ELEMENTS(pVM->trpm.s.aIdt))
1243	{
1244	AssertMsg(iTrap < TRPM_HANDLER_INT_BASE, ("Illegal gate number %d!\n", iTrap));
1245	return VERR_INVALID_PARAMETER;
1246	}
1247
1248	AssertReturn(pHandler == TRPM_INVALID_HANDLER \|\| PATMIsPatchGCAddr(pVM, pHandler), VERR_INVALID_PARAMETER);
1249
1250	uint16_t cbIDT;
1251	RTGCPTR GCPtrIDT = CPUMGetGuestIDTR(pVCpu, &cbIDT);
1252	if (iTrap * sizeof(VBOXIDTE) >= cbIDT)
1253	return VERR_INVALID_PARAMETER; /* Silently ignore out of range requests. */
1254
1255	if (pHandler == TRPM_INVALID_HANDLER)
1256	{
1257	/* clear trap handler */
1258	Log(("TRPMR3SetGuestTrapHandler: clear handler %x\n", iTrap));
1259	return trpmClearGuestTrapHandler(pVM, iTrap);
1260	}
1261
1262	/*
1263	* Read the guest IDT entry.
1264	*/
1265	VBOXIDTE GuestIdte;
1266	int rc = PGMPhysSimpleReadGCPtr(pVCpu, &GuestIdte, GCPtrIDT + iTrap * sizeof(GuestIdte), sizeof(GuestIdte));
1267	if (RT_FAILURE(rc))
1268	{
1269	AssertMsgRC(rc, ("Failed to read IDTE! rc=%Rrc\n", rc));
1270	return rc;
1271	}
1272
1273	if (EMIsRawRing0Enabled(pVM))
1274	{
1275	/*
1276	* Only replace handlers for which we are 100% certain there won't be
1277	* any host interrupts.
1278	*
1279	* 0x2E is safe on Windows because it's the system service interrupt gate. Not
1280	* quite certain if this is safe or not on 64-bit Vista, it probably is.
1281	*
1282	* 0x80 is safe on Linux because it's the syscall vector and is part of the
1283	* 32-bit usermode ABI. 64-bit Linux (usually) supports 32-bit processes
1284	* and will therefor never assign hardware interrupts to 0x80.
1285	*
1286	* Exactly why 0x80 is safe on 32-bit Windows is a bit hazy, but it seems
1287	* to work ok... However on 64-bit Vista (SMP?) is doesn't work reliably.
1288	* Booting Linux/BSD guest will cause system lockups on most of the computers.
1289	* -> Update: It seems gate 0x80 is not safe on 32-bits Windows either. See
1290	* defect #3604.
1291	*
1292	* PORTME - Check if your host keeps any of these gates free from hw ints.
1293	*
1294	* Note! SELMR3SyncTSS also has code related to this interrupt handler replacing.
1295	*/
1296	/** @todo handle those dependencies better! */
1297	/** @todo Solve this in a proper manner. see defect #1186 */
1298	#if defined(RT_OS_WINDOWS) && defined(RT_ARCH_X86)
1299	if (iTrap == 0x2E)
1300	#elif defined(RT_OS_LINUX)
1301	if (iTrap == 0x80)
1302	#else
1303	if (0)
1304	#endif
1305	{
1306	if ( GuestIdte.Gen.u1Present
1307	&& ( GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_TRAP_32
1308	\|\| GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32)
1309	&& GuestIdte.Gen.u2DPL == 3)
1310	{
1311	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
1312
1313	GuestIdte.Gen.u5Type2 = VBOX_IDTE_TYPE2_TRAP_32;
1314	GuestIdte.Gen.u16OffsetHigh = pHandler >> 16;
1315	GuestIdte.Gen.u16OffsetLow = pHandler & 0xFFFF;
1316	GuestIdte.Gen.u16SegSel \|= 1; //ring 1
1317	*pIdte = GuestIdte;
1318
1319	/* Mark it for relocation purposes. */
1320	ASMBitSet(&pVM->trpm.s.au32IdtPatched[0], iTrap);
1321
1322	/* Also store it in our guest trap array. */
1323	pVM->trpm.s.aGuestTrapHandler[iTrap] = pHandler;
1324
1325	Log(("Setting trap handler %x to %08X (direct)\n", iTrap, pHandler));
1326	return VINF_SUCCESS;
1327	}
1328	/* ok, let's try to install a trampoline handler then. */
1329	}
1330	}
1331
1332	if ( GuestIdte.Gen.u1Present
1333	&& ( GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_TRAP_32
1334	\|\| GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32)
1335	&& (GuestIdte.Gen.u2DPL == 3 \|\| GuestIdte.Gen.u2DPL == 0))
1336	{
1337	/*
1338	* Save handler which can be used for a trampoline call inside the GC
1339	*/
1340	Log(("Setting trap handler %x to %08X\n", iTrap, pHandler));
1341	pVM->trpm.s.aGuestTrapHandler[iTrap] = pHandler;
1342	return VINF_SUCCESS;
1343	}
1344	return VERR_INVALID_PARAMETER;
1345	}
1346
1347
1348	/**
1349	* Check if address is a gate handler (interrupt/trap/task/anything).
1350	*
1351	* @returns True is gate handler, false if not.
1352	*
1353	* @param pVM VM handle.
1354	* @param GCPtr GC address to check.
1355	*/
1356	VMMR3DECL(bool) TRPMR3IsGateHandler(PVM pVM, RTRCPTR GCPtr)
1357	{
1358	/* Only valid in raw mode which implies 1 VCPU */
1359	Assert(PATMIsEnabled(pVM) && pVM->cCPUs == 1);
1360	PVMCPU pVCpu = &pVM->aCpus[0];
1361
1362	/*
1363	* Read IDTR and calc last entry.
1364	*/
1365	uint16_t cbIDT;
1366	RTGCPTR GCPtrIDTE = CPUMGetGuestIDTR(pVCpu, &cbIDT);
1367	unsigned cEntries = (cbIDT + 1) / sizeof(VBOXIDTE);
1368	if (!cEntries)
1369	return false;
1370	RTGCPTR GCPtrIDTELast = GCPtrIDTE + (cEntries - 1) * sizeof(VBOXIDTE);
1371
1372	/*
1373	* Outer loop: interate pages.
1374	*/
1375	while (GCPtrIDTE <= GCPtrIDTELast)
1376	{
1377	/*
1378	* Convert this page to a HC address.
1379	* (This function checks for not-present pages.)
1380	*/
1381	PCVBOXIDTE pIDTE;
1382	PGMPAGEMAPLOCK Lock;
1383	int rc = PGMPhysGCPtr2CCPtrReadOnly(pVCpu, GCPtrIDTE, (const void **)&pIDTE, &Lock);
1384	if (RT_SUCCESS(rc))
1385	{
1386	/*
1387	* Inner Loop: Iterate the data on this page looking for an entry equal to GCPtr.
1388	* N.B. Member of the Flat Earth Society...
1389	*/
1390	while (GCPtrIDTE <= GCPtrIDTELast)
1391	{
1392	if (pIDTE->Gen.u1Present)
1393	{
1394	RTRCPTR GCPtrHandler = VBOXIDTE_OFFSET(*pIDTE);
1395	if (GCPtr == GCPtrHandler)
1396	{
1397	PGMPhysReleasePageMappingLock(pVM, &Lock);
1398	return true;
1399	}
1400	}
1401
1402	/* next entry */
1403	if ((GCPtrIDTE & PAGE_OFFSET_MASK) + sizeof(VBOXIDTE) >= PAGE_SIZE)
1404	{
1405	AssertMsg(!(GCPtrIDTE & (sizeof(VBOXIDTE) - 1)),
1406	("IDT is crossing pages and it's not aligned! GCPtrIDTE=%#x cbIDT=%#x\n", GCPtrIDTE, cbIDT));
1407	GCPtrIDTE += sizeof(VBOXIDTE);
1408	break;
1409	}
1410	GCPtrIDTE += sizeof(VBOXIDTE);
1411	pIDTE++;
1412	}
1413	PGMPhysReleasePageMappingLock(pVM, &Lock);
1414	}
1415	else
1416	{
1417	/* Skip to the next page (if any). Take care not to wrap around the address space. */
1418	if ((GCPtrIDTELast >> PAGE_SHIFT) == (GCPtrIDTE >> PAGE_SHIFT))
1419	return false;
1420	GCPtrIDTE = RT_ALIGN_T(GCPtrIDTE, PAGE_SIZE, RTGCPTR) + PAGE_SIZE + (GCPtrIDTE & (sizeof(VBOXIDTE) - 1));
1421	}
1422	}
1423	return false;
1424	}
1425
1426
1427	/**
1428	* Inject event (such as external irq or trap)
1429	*
1430	* @returns VBox status code.
1431	* @param pVM The VM to operate on.
1432	* @param pVCpu The VMCPU to operate on.
1433	* @param enmEvent Trpm event type
1434	*/
1435	VMMR3DECL(int) TRPMR3InjectEvent(PVM pVM, PVMCPU pVCpu, TRPMEVENT enmEvent)
1436	{
1437	PCPUMCTX pCtx;
1438	int rc;
1439
1440	pCtx = CPUMQueryGuestCtxPtr(pVCpu);
1441	Assert(!PATMIsPatchGCAddr(pVM, (RTGCPTR)pCtx->eip));
1442	Assert(!VMCPU_FF_ISSET(pVCpu, VMCPU_FF_INHIBIT_INTERRUPTS));
1443
1444	/* Currently only useful for external hardware interrupts. */
1445	Assert(enmEvent == TRPM_HARDWARE_INT);
1446
1447	if (REMR3QueryPendingInterrupt(pVM, pVCpu) == REM_NO_PENDING_IRQ)
1448	{
1449	#ifdef TRPM_FORWARD_TRAPS_IN_GC
1450
1451	# ifdef LOG_ENABLED
1452	DBGFR3InfoLog(pVM, "cpumguest", "TRPMInject");
1453	DBGFR3DisasInstrCurrentLog(pVCpu, "TRPMInject");
1454	# endif
1455
1456	uint8_t u8Interrupt;
1457	rc = PDMGetInterrupt(pVCpu, &u8Interrupt);
1458	Log(("TRPMR3InjectEvent: CPU%d u8Interrupt=%d (%#x) rc=%Rrc\n", pVCpu->idCpu, u8Interrupt, u8Interrupt, rc));
1459	if (RT_SUCCESS(rc))
1460	{
1461	if (HWACCMIsEnabled(pVM))
1462	{
1463	rc = TRPMAssertTrap(pVCpu, u8Interrupt, enmEvent);
1464	AssertRC(rc);
1465	STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1466	return HWACCMR3IsActive(pVCpu) ? VINF_EM_RESCHEDULE_HWACC : VINF_EM_RESCHEDULE_REM;
1467	}
1468	/* If the guest gate is not patched, then we will check (again) if we can patch it. */
1469	if (pVM->trpm.s.aGuestTrapHandler[u8Interrupt] == TRPM_INVALID_HANDLER)
1470	{
1471	CSAMR3CheckGates(pVM, u8Interrupt, 1);
1472	Log(("TRPMR3InjectEvent: recheck gate %x -> valid=%d\n", u8Interrupt, TRPMR3GetGuestTrapHandler(pVM, u8Interrupt) != TRPM_INVALID_HANDLER));
1473	}
1474
1475	if (pVM->trpm.s.aGuestTrapHandler[u8Interrupt] != TRPM_INVALID_HANDLER)
1476	{
1477	/* Must check pending forced actions as our IDT or GDT might be out of sync */
1478	rc = EMR3CheckRawForcedActions(pVM, pVCpu);
1479	if (rc == VINF_SUCCESS)
1480	{
1481	/* There's a handler -> let's execute it in raw mode */
1482	rc = TRPMForwardTrap(pVCpu, CPUMCTX2CORE(pCtx), u8Interrupt, 0, TRPM_TRAP_NO_ERRORCODE, enmEvent, -1);
1483	if (rc == VINF_SUCCESS /* Don't use RT_SUCCESS */)
1484	{
1485	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));
1486
1487	STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1488	return VINF_EM_RESCHEDULE_RAW;
1489	}
1490	}
1491	}
1492	else
1493	STAM_COUNTER_INC(&pVM->trpm.s.StatForwardFailNoHandler);
1494	REMR3NotifyPendingInterrupt(pVM, pVCpu, u8Interrupt);
1495	}
1496	else
1497	{
1498	AssertRC(rc);
1499	return HWACCMR3IsActive(pVCpu) ? VINF_EM_RESCHEDULE_HWACC : VINF_EM_RESCHEDULE_REM; /* (Heed the halted state if this is changed!) */
1500	}
1501	#else
1502	if (HWACCMR3IsActive(pVM))
1503	{
1504	uint8_t u8Interrupt;
1505	rc = PDMGetInterrupt(pVCpu, &u8Interrupt);
1506	Log(("TRPMR3InjectEvent: u8Interrupt=%d (%#x) rc=%Rrc\n", u8Interrupt, u8Interrupt, rc));
1507	if (RT_SUCCESS(rc))
1508	{
1509	rc = TRPMAssertTrap(pVM, u8Interrupt, TRPM_HARDWARE_INT);
1510	AssertRC(rc);
1511	STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1512	return VINF_EM_RESCHEDULE_HWACC;
1513	}
1514	}
1515	else
1516	AssertRC(rc);
1517	#endif
1518	}
1519	/** @todo check if it's safe to translate the patch address to the original guest address.
1520	* this implies a safe state in translated instructions and should take sti successors into account (instruction fusing)
1521	*/
1522	/* Note: if it's a PATM address, then we'll go back to raw mode regardless of the return code below. */
1523
1524	/* Fall back to the recompiler */
1525	return VINF_EM_RESCHEDULE_REM; /* (Heed the halted state if this is changed!) */
1526	}
1527

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source: vbox/trunk/src/VBox/VMM/TRPM.cpp@ 21895

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