TRPM.cpp@ 16774

Last change on this file since 16774 was 16478, checked in by vboxsync, 16 years ago
Disable usage of the 0x80 idt gate on 32 bits Windows too. (raw mode only)
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 72.7 KB

Line
1	/* $Id: TRPM.cpp 16478 2009-02-03 10:07:55Z 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 8
434
435
436	/*******************************************************************************
437	* Internal Functions *
438	*******************************************************************************/
439	static DECLCALLBACK(int) trpmR3Save(PVM pVM, PSSMHANDLE pSSM);
440	static DECLCALLBACK(int) trpmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version);
441	static DECLCALLBACK(int) trpmR3GuestIDTWriteHandler(PVM pVM, RTGCPTR GCPtr, void pvPtr, void pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser);
442
443
444	/**
445	* Initializes the Trap Manager
446	*
447	* @returns VBox status code.
448	* @param pVM The VM to operate on.
449	*/
450	VMMR3DECL(int) TRPMR3Init(PVM pVM)
451	{
452	LogFlow(("TRPMR3Init\n"));
453
454	/*
455	* Assert sizes and alignments.
456	*/
457	AssertRelease(!(RT_OFFSETOF(VM, trpm.s) & 31));
458	AssertRelease(!(RT_OFFSETOF(VM, trpm.s.aIdt) & 15));
459	AssertRelease(sizeof(pVM->trpm.s) <= sizeof(pVM->trpm.padding));
460	AssertRelease(RT_ELEMENTS(pVM->trpm.s.aGuestTrapHandler) == sizeof(pVM->trpm.s.au32IdtPatched)*8);
461
462	/*
463	* Initialize members.
464	*/
465	pVM->trpm.s.offVM = RT_OFFSETOF(VM, trpm);
466	pVM->trpm.s.uActiveVector = ~0;
467	pVM->trpm.s.GuestIdtr.pIdt = RTRCPTR_MAX;
468	pVM->trpm.s.pvMonShwIdtRC = RTRCPTR_MAX;
469	pVM->trpm.s.fDisableMonitoring = false;
470	pVM->trpm.s.fSafeToDropGuestIDTMonitoring = false;
471
472	/*
473	* Read the configuration (if any).
474	*/
475	PCFGMNODE pTRPMNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "TRPM");
476	if (pTRPMNode)
477	{
478	bool f;
479	int rc = CFGMR3QueryBool(pTRPMNode, "SafeToDropGuestIDTMonitoring", &f);
480	if (RT_SUCCESS(rc))
481	pVM->trpm.s.fSafeToDropGuestIDTMonitoring = f;
482	}
483
484	/* write config summary to log */
485	if (pVM->trpm.s.fSafeToDropGuestIDTMonitoring)
486	LogRel(("TRPM: Dropping Guest IDT Monitoring.\n"));
487
488	/*
489	* Initialize the IDT.
490	* The handler addresses will be set in the TRPMR3Relocate() function.
491	*/
492	Assert(sizeof(pVM->trpm.s.aIdt) == sizeof(g_aIdt));
493	memcpy(&pVM->trpm.s.aIdt[0], &g_aIdt[0], sizeof(pVM->trpm.s.aIdt));
494
495	/*
496	* Register the saved state data unit.
497	*/
498	int rc = SSMR3RegisterInternal(pVM, "trpm", 1, TRPM_SAVED_STATE_VERSION, sizeof(TRPM),
499	NULL, trpmR3Save, NULL,
500	NULL, trpmR3Load, NULL);
501	if (RT_FAILURE(rc))
502	return rc;
503
504	/*
505	* Statistics.
506	*/
507	STAM_REG(pVM, &pVM->trpm.s.StatRCWriteGuestIDTFault, STAMTYPE_COUNTER, "/TRPM/RC/IDTWritesFault", STAMUNIT_OCCURENCES, "Guest IDT writes the we returned to R3 to handle.");
508	STAM_REG(pVM, &pVM->trpm.s.StatRCWriteGuestIDTHandled, STAMTYPE_COUNTER, "/TRPM/RC/IDTWritesHandled", STAMUNIT_OCCURENCES, "Guest IDT writes that we handled successfully.");
509	STAM_REG(pVM, &pVM->trpm.s.StatSyncIDT, STAMTYPE_PROFILE, "/PROF/TRPM/SyncIDT", STAMUNIT_TICKS_PER_CALL, "Profiling of TRPMR3SyncIDT().");
510
511	/* traps */
512	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x00], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/00", STAMUNIT_TICKS_PER_CALL, "#DE - Divide error.");
513	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).");
514	//STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x02], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/02", STAMUNIT_TICKS_PER_CALL, "NMI");
515	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x03], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/03", STAMUNIT_TICKS_PER_CALL, "#BP - Breakpoint.");
516	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x04], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/04", STAMUNIT_TICKS_PER_CALL, "#OF - Overflow.");
517	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x05], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/05", STAMUNIT_TICKS_PER_CALL, "#BR - Bound range exceeded.");
518	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x06], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/06", STAMUNIT_TICKS_PER_CALL, "#UD - Undefined opcode.");
519	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x07], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/07", STAMUNIT_TICKS_PER_CALL, "#NM - Device not available (FPU).");
520	//STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x08], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/08", STAMUNIT_TICKS_PER_CALL, "#DF - Double fault.");
521	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x09], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/09", STAMUNIT_TICKS_PER_CALL, "#?? - Coprocessor segment overrun (obsolete).");
522	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0a], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0a", STAMUNIT_TICKS_PER_CALL, "#TS - Task switch fault.");
523	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0b], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0b", STAMUNIT_TICKS_PER_CALL, "#NP - Segemnt not present.");
524	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0c], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0c", STAMUNIT_TICKS_PER_CALL, "#SS - Stack segment fault.");
525	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0d], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0d", STAMUNIT_TICKS_PER_CALL, "#GP - General protection fault.");
526	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0e], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0e", STAMUNIT_TICKS_PER_CALL, "#PF - Page fault.");
527	//STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0f], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0f", STAMUNIT_TICKS_PER_CALL, "Reserved.");
528	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x10], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/10", STAMUNIT_TICKS_PER_CALL, "#MF - Math fault..");
529	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x11], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/11", STAMUNIT_TICKS_PER_CALL, "#AC - Alignment check.");
530	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x12], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/12", STAMUNIT_TICKS_PER_CALL, "#MC - Machine check.");
531	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x13], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/13", STAMUNIT_TICKS_PER_CALL, "#XF - SIMD Floating-Point Exception.");
532
533	#ifdef VBOX_WITH_STATISTICS
534	rc = MMHyperAlloc(pVM, sizeof(STAMCOUNTER) * 255, 8, MM_TAG_STAM, (void **)&pVM->trpm.s.paStatForwardedIRQR3);
535	AssertRCReturn(rc, rc);
536	pVM->trpm.s.paStatForwardedIRQRC = MMHyperR3ToRC(pVM, pVM->trpm.s.paStatForwardedIRQR3);
537	pVM->trpm.s.paStatForwardedIRQR0 = MMHyperR3ToR0(pVM, pVM->trpm.s.paStatForwardedIRQR3);
538	for (unsigned i = 0; i < 255; i++)
539	STAMR3RegisterF(pVM, &pVM->trpm.s.paStatForwardedIRQR3[i], STAMTYPE_COUNTER, STAMVISIBILITY_USED, STAMUNIT_OCCURENCES, "Forwarded interrupts.",
540	i < 0x20 ? "/TRPM/ForwardRaw/TRAP/%02X" : "/TRPM/ForwardRaw/IRQ/%02X", i);
541	#endif
542
543	STAM_REG(pVM, &pVM->trpm.s.StatForwardProfR3, STAMTYPE_PROFILE_ADV, "/TRPM/ForwardRaw/ProfR3", STAMUNIT_TICKS_PER_CALL, "Profiling TRPMForwardTrap.");
544	STAM_REG(pVM, &pVM->trpm.s.StatForwardProfRZ, STAMTYPE_PROFILE_ADV, "/TRPM/ForwardRaw/ProfRZ", STAMUNIT_TICKS_PER_CALL, "Profiling TRPMForwardTrap.");
545	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailNoHandler, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/FailNoHandler", STAMUNIT_OCCURENCES,"Failure to forward interrupt in raw mode.");
546	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailPatchAddr, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/FailPatchAddr", STAMUNIT_OCCURENCES,"Failure to forward interrupt in raw mode.");
547	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailR3, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/FailR3", STAMUNIT_OCCURENCES, "Failure to forward interrupt in raw mode.");
548	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailRZ, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/FailRZ", STAMUNIT_OCCURENCES, "Failure to forward interrupt in raw mode.");
549
550	STAM_REG(pVM, &pVM->trpm.s.StatTrap0dDisasm, STAMTYPE_PROFILE, "/TRPM/RC/Traps/0d/Disasm", STAMUNIT_TICKS_PER_CALL, "Profiling disassembly part of trpmGCTrap0dHandler.");
551	STAM_REG(pVM, &pVM->trpm.s.StatTrap0dRdTsc, STAMTYPE_COUNTER, "/TRPM/RC/Traps/0d/RdTsc", STAMUNIT_OCCURENCES, "Number of RDTSC #GPs.");
552
553	/*
554	* Default action when entering raw mode for the first time
555	*/
556	VM_FF_SET(pVM, VM_FF_TRPM_SYNC_IDT);
557	return 0;
558	}
559
560
561	/**
562	* Applies relocations to data and code managed by this component.
563	*
564	* This function will be called at init and whenever the VMM need
565	* to relocate itself inside the GC.
566	*
567	* @param pVM The VM handle.
568	* @param offDelta Relocation delta relative to old location.
569	*/
570	VMMR3DECL(void) TRPMR3Relocate(PVM pVM, RTGCINTPTR offDelta)
571	{
572	LogFlow(("TRPMR3Relocate\n"));
573	/*
574	* Get the trap handler addresses.
575	*
576	* If VMMGC.gc is screwed, so are we. We'll assert here since it elsewise
577	* would make init order impossible if we should assert the presence of these
578	* exports in TRPMR3Init().
579	*/
580	RTRCPTR aRCPtrs[TRPM_HANDLER_MAX] = {0};
581	int rc;
582	rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerInterupt", &aRCPtrs[TRPM_HANDLER_INT]);
583	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerInterupt in VMMGC.gc!\n"));
584
585	rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerGeneric", &aRCPtrs[TRPM_HANDLER_TRAP]);
586	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerGeneric in VMMGC.gc!\n"));
587
588	rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerTrap08", &aRCPtrs[TRPM_HANDLER_TRAP_08]);
589	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerTrap08 in VMMGC.gc!\n"));
590
591	rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerTrap12", &aRCPtrs[TRPM_HANDLER_TRAP_12]);
592	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerTrap12 in VMMGC.gc!\n"));
593
594	RTSEL SelCS = CPUMGetHyperCS(pVM);
595
596	/*
597	* Iterate the idt and set the addresses.
598	*/
599	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[0];
600	PVBOXIDTE_GENERIC pIdteTemplate = &g_aIdt[0];
601	for (unsigned i = 0; i < RT_ELEMENTS(pVM->trpm.s.aIdt); i++, pIdte++, pIdteTemplate++)
602	{
603	if ( pIdte->Gen.u1Present
604	&& !ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], i)
605	)
606	{
607	Assert(pIdteTemplate->u16OffsetLow < TRPM_HANDLER_MAX);
608	RTGCPTR Offset = aRCPtrs[pIdteTemplate->u16OffsetLow];
609	switch (pIdteTemplate->u16OffsetLow)
610	{
611	/*
612	* Generic handlers have different entrypoints for each possible
613	* vector number. These entrypoints makes a sort of an array with
614	* 8 byte entries where the vector number is the index.
615	* See TRPMGCHandlersA.asm for details.
616	*/
617	case TRPM_HANDLER_INT:
618	case TRPM_HANDLER_TRAP:
619	Offset += i * 8;
620	break;
621	case TRPM_HANDLER_TRAP_12:
622	break;
623	case TRPM_HANDLER_TRAP_08:
624	/* Handle #DF Task Gate in special way. */
625	pIdte->Gen.u16SegSel = SELMGetTrap8Selector(pVM);
626	pIdte->Gen.u16OffsetLow = 0;
627	pIdte->Gen.u16OffsetHigh = 0;
628	SELMSetTrap8EIP(pVM, Offset);
629	continue;
630	}
631	/* (non-task gates only ) */
632	pIdte->Gen.u16OffsetLow = Offset & 0xffff;
633	pIdte->Gen.u16OffsetHigh = Offset >> 16;
634	pIdte->Gen.u16SegSel = SelCS;
635	}
636	}
637
638	/*
639	* Update IDTR (limit is including!).
640	*/
641	CPUMSetHyperIDTR(pVM, VM_RC_ADDR(pVM, &pVM->trpm.s.aIdt[0]), sizeof(pVM->trpm.s.aIdt)-1);
642
643	if (!pVM->trpm.s.fDisableMonitoring)
644	{
645	#ifdef TRPM_TRACK_SHADOW_IDT_CHANGES
646	if (pVM->trpm.s.pvMonShwIdtRC != RTRCPTR_MAX)
647	{
648	rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.pvMonShwIdtRC);
649	AssertRC(rc);
650	}
651	pVM->trpm.s.pvMonShwIdtRC = VM_RC_ADDR(pVM, &pVM->trpm.s.aIdt[0]);
652	rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_HYPERVISOR, pVM->trpm.s.pvMonShwIdtRC, pVM->trpm.s.pvMonShwIdtRC + sizeof(pVM->trpm.s.aIdt) - 1,
653	0, 0, "trpmRCShadowIDTWriteHandler", 0, "Shadow IDT write access handler");
654	AssertRC(rc);
655	#endif
656	}
657
658	/* Relocate IDT handlers for forwarding guest traps/interrupts. */
659	for (uint32_t iTrap = 0; iTrap < RT_ELEMENTS(pVM->trpm.s.aGuestTrapHandler); iTrap++)
660	{
661	if (pVM->trpm.s.aGuestTrapHandler[iTrap] != TRPM_INVALID_HANDLER)
662	{
663	Log(("TRPMR3Relocate: iGate=%2X Handler %RRv -> %RRv\n", iTrap, pVM->trpm.s.aGuestTrapHandler[iTrap], pVM->trpm.s.aGuestTrapHandler[iTrap] + offDelta));
664	pVM->trpm.s.aGuestTrapHandler[iTrap] += offDelta;
665	}
666
667	if (ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], iTrap))
668	{
669	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
670	RTGCPTR pHandler = VBOXIDTE_OFFSET(*pIdte);
671
672	Log(("TRPMR3Relocate: *iGate=%2X Handler %RGv -> %RGv\n", iTrap, pHandler, pHandler + offDelta));
673	pHandler += offDelta;
674
675	pIdte->Gen.u16OffsetHigh = pHandler >> 16;
676	pIdte->Gen.u16OffsetLow = pHandler & 0xFFFF;
677
678	}
679	}
680
681	#ifdef VBOX_WITH_STATISTICS
682	pVM->trpm.s.paStatForwardedIRQRC += offDelta;
683	pVM->trpm.s.paStatForwardedIRQR0 = MMHyperR3ToR0(pVM, pVM->trpm.s.paStatForwardedIRQR3);
684	#endif
685	}
686
687
688	/**
689	* Terminates the Trap Manager
690	*
691	* @returns VBox status code.
692	* @param pVM The VM to operate on.
693	*/
694	VMMR3DECL(int) TRPMR3Term(PVM pVM)
695	{
696	NOREF(pVM);
697	return 0;
698	}
699
700
701	/**
702	* The VM is being reset.
703	*
704	* For the TRPM component this means that any IDT write monitors
705	* needs to be removed, any pending trap cleared, and the IDT reset.
706	*
707	* @param pVM VM handle.
708	*/
709	VMMR3DECL(void) TRPMR3Reset(PVM pVM)
710	{
711	/*
712	* Deregister any virtual handlers.
713	*/
714	#ifdef TRPM_TRACK_GUEST_IDT_CHANGES
715	if (pVM->trpm.s.GuestIdtr.pIdt != RTRCPTR_MAX)
716	{
717	if (!pVM->trpm.s.fSafeToDropGuestIDTMonitoring)
718	{
719	int rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GuestIdtr.pIdt);
720	AssertRC(rc);
721	}
722	pVM->trpm.s.GuestIdtr.pIdt = RTRCPTR_MAX;
723	}
724	pVM->trpm.s.GuestIdtr.cbIdt = 0;
725	#endif
726
727	/*
728	* Reinitialize other members calling the relocator to get things right.
729	*/
730	pVM->trpm.s.uActiveVector = ~0;
731	memcpy(&pVM->trpm.s.aIdt[0], &g_aIdt[0], sizeof(pVM->trpm.s.aIdt));
732	memset(pVM->trpm.s.aGuestTrapHandler, 0, sizeof(pVM->trpm.s.aGuestTrapHandler));
733	TRPMR3Relocate(pVM, 0);
734
735	/*
736	* Default action when entering raw mode for the first time
737	*/
738	VM_FF_SET(pVM, VM_FF_TRPM_SYNC_IDT);
739	}
740
741
742	/**
743	* Execute state save operation.
744	*
745	* @returns VBox status code.
746	* @param pVM VM Handle.
747	* @param pSSM SSM operation handle.
748	*/
749	static DECLCALLBACK(int) trpmR3Save(PVM pVM, PSSMHANDLE pSSM)
750	{
751	LogFlow(("trpmR3Save:\n"));
752
753	/*
754	* Active and saved traps.
755	*/
756	PTRPM pTrpm = &pVM->trpm.s;
757	SSMR3PutUInt(pSSM, pTrpm->uActiveVector);
758	SSMR3PutUInt(pSSM, pTrpm->enmActiveType);
759	SSMR3PutGCUInt(pSSM, pTrpm->uActiveErrorCode);
760	SSMR3PutGCUIntPtr(pSSM, pTrpm->uActiveCR2);
761	SSMR3PutGCUInt(pSSM, pTrpm->uSavedVector);
762	SSMR3PutUInt(pSSM, pTrpm->enmSavedType);
763	SSMR3PutGCUInt(pSSM, pTrpm->uSavedErrorCode);
764	SSMR3PutGCUIntPtr(pSSM, pTrpm->uSavedCR2);
765	SSMR3PutGCUInt(pSSM, pTrpm->uPrevVector);
766	#if 0 /** @todo Enable this (+ load change) on the next version change. */
767	SSMR3PutBool(pSSM, pTrpm->fDisableMonitoring);
768	#else
769	SSMR3PutGCUInt(pSSM, pTrpm->fDisableMonitoring);
770	#endif
771	SSMR3PutUInt(pSSM, VM_FF_ISSET(pVM, VM_FF_TRPM_SYNC_IDT));
772	SSMR3PutMem(pSSM, &pTrpm->au32IdtPatched[0], sizeof(pTrpm->au32IdtPatched));
773	SSMR3PutU32(pSSM, ~0); /* separator. */
774
775	/*
776	* Save any trampoline gates.
777	*/
778	for (uint32_t iTrap = 0; iTrap < RT_ELEMENTS(pTrpm->aGuestTrapHandler); iTrap++)
779	{
780	if (pTrpm->aGuestTrapHandler[iTrap])
781	{
782	SSMR3PutU32(pSSM, iTrap);
783	SSMR3PutGCPtr(pSSM, pTrpm->aGuestTrapHandler[iTrap]);
784	SSMR3PutMem(pSSM, &pTrpm->aIdt[iTrap], sizeof(pTrpm->aIdt[iTrap]));
785	}
786	}
787
788	return SSMR3PutU32(pSSM, ~0); /* terminator */
789	}
790
791
792	/**
793	* Execute state load operation.
794	*
795	* @returns VBox status code.
796	* @param pVM VM Handle.
797	* @param pSSM SSM operation handle.
798	* @param u32Version Data layout version.
799	*/
800	static DECLCALLBACK(int) trpmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version)
801	{
802	LogFlow(("trpmR3Load:\n"));
803
804	/*
805	* Validate version.
806	*/
807	if (u32Version != TRPM_SAVED_STATE_VERSION)
808	{
809	AssertMsgFailed(("trpmR3Load: Invalid version u32Version=%d!\n", u32Version));
810	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
811	}
812
813	/*
814	* Call the reset function to kick out any handled gates and other potential trouble.
815	*/
816	TRPMR3Reset(pVM);
817
818	/*
819	* Active and saved traps.
820	*/
821	PTRPM pTrpm = &pVM->trpm.s;
822	SSMR3GetUInt(pSSM, &pTrpm->uActiveVector);
823	SSMR3GetUInt(pSSM, (uint32_t *)&pTrpm->enmActiveType);
824	SSMR3GetGCUInt(pSSM, &pTrpm->uActiveErrorCode);
825	SSMR3GetGCUIntPtr(pSSM, &pTrpm->uActiveCR2);
826	SSMR3GetGCUInt(pSSM, &pTrpm->uSavedVector);
827	SSMR3GetUInt(pSSM, (uint32_t *)&pTrpm->enmSavedType);
828	SSMR3GetGCUInt(pSSM, &pTrpm->uSavedErrorCode);
829	SSMR3GetGCUIntPtr(pSSM, &pTrpm->uSavedCR2);
830	SSMR3GetGCUInt(pSSM, &pTrpm->uPrevVector);
831	#if 0 /** @todo Enable this + the corresponding save code on the next version change. */
832	SSMR3GetBool(pSSM, &pTrpm->fDisableMonitoring);
833	#else
834	RTGCUINT fDisableMonitoring;
835	SSMR3GetGCUInt(pSSM, &fDisableMonitoring);
836	pTrpm->fDisableMonitoring = !!fDisableMonitoring;
837	#endif
838
839	RTUINT fSyncIDT;
840	int rc = SSMR3GetUInt(pSSM, &fSyncIDT);
841	if (RT_FAILURE(rc))
842	return rc;
843	if (fSyncIDT & ~1)
844	{
845	AssertMsgFailed(("fSyncIDT=%#x\n", fSyncIDT));
846	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
847	}
848	if (fSyncIDT)
849	VM_FF_SET(pVM, VM_FF_TRPM_SYNC_IDT);
850	/* else: cleared by reset call above. */
851
852	SSMR3GetMem(pSSM, &pTrpm->au32IdtPatched[0], sizeof(pTrpm->au32IdtPatched));
853
854	/* check the separator */
855	uint32_t u32Sep;
856	rc = SSMR3GetU32(pSSM, &u32Sep);
857	if (RT_FAILURE(rc))
858	return rc;
859	if (u32Sep != (uint32_t)~0)
860	{
861	AssertMsgFailed(("u32Sep=%#x (first)\n", u32Sep));
862	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
863	}
864
865	/*
866	* Restore any trampoline gates.
867	*/
868	for (;;)
869	{
870	/* gate number / terminator */
871	uint32_t iTrap;
872	rc = SSMR3GetU32(pSSM, &iTrap);
873	if (RT_FAILURE(rc))
874	return rc;
875	if (iTrap == (uint32_t)~0)
876	break;
877	if ( iTrap >= RT_ELEMENTS(pTrpm->aIdt)
878	\|\| pTrpm->aGuestTrapHandler[iTrap])
879	{
880	AssertMsgFailed(("iTrap=%#x\n", iTrap));
881	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
882	}
883
884	/* restore the IDT entry. */
885	RTGCPTR GCPtrHandler;
886	SSMR3GetGCPtr(pSSM, &GCPtrHandler);
887	VBOXIDTE Idte;
888	rc = SSMR3GetMem(pSSM, &Idte, sizeof(Idte));
889	if (RT_FAILURE(rc))
890	return rc;
891	Assert(GCPtrHandler);
892	pTrpm->aIdt[iTrap] = Idte;
893	}
894
895	return VINF_SUCCESS;
896	}
897
898
899	/**
900	* Check if gate handlers were updated
901	* (callback for the VM_FF_TRPM_SYNC_IDT forced action).
902	*
903	* @returns VBox status code.
904	* @param pVM The VM handle.
905	*/
906	VMMR3DECL(int) TRPMR3SyncIDT(PVM pVM)
907	{
908	STAM_PROFILE_START(&pVM->trpm.s.StatSyncIDT, a);
909	const bool fRawRing0 = EMIsRawRing0Enabled(pVM);
910	int rc;
911
912	if (pVM->trpm.s.fDisableMonitoring)
913	{
914	VM_FF_CLEAR(pVM, VM_FF_TRPM_SYNC_IDT);
915	return VINF_SUCCESS; /* Nothing to do */
916	}
917
918	if (fRawRing0 && CSAMIsEnabled(pVM))
919	{
920	/* Clear all handlers */
921	Log(("TRPMR3SyncIDT: Clear all trap handlers.\n"));
922	/** @todo inefficient, but simple */
923	for (unsigned iGate = 0; iGate < 256; iGate++)
924	trpmClearGuestTrapHandler(pVM, iGate);
925
926	/* Scan them all (only the first time) */
927	CSAMR3CheckGates(pVM, 0, 256);
928	}
929
930	/*
931	* Get the IDTR.
932	*/
933	VBOXIDTR IDTR;
934	IDTR.pIdt = CPUMGetGuestIDTR(pVM, &IDTR.cbIdt);
935	if (!IDTR.cbIdt)
936	{
937	Log(("No IDT entries...\n"));
938	return DBGFSTOP(pVM);
939	}
940
941	#ifdef TRPM_TRACK_GUEST_IDT_CHANGES
942	/*
943	* Check if Guest's IDTR has changed.
944	*/
945	if ( IDTR.pIdt != pVM->trpm.s.GuestIdtr.pIdt
946	\|\| IDTR.cbIdt != pVM->trpm.s.GuestIdtr.cbIdt)
947	{
948	Log(("TRPMR3UpdateFromCPUM: Guest's IDT is changed to pIdt=%08X cbIdt=%08X\n", IDTR.pIdt, IDTR.cbIdt));
949	if (!pVM->trpm.s.fSafeToDropGuestIDTMonitoring)
950	{
951	/*
952	* [Re]Register write virtual handler for guest's IDT.
953	*/
954	if (pVM->trpm.s.GuestIdtr.pIdt != RTRCPTR_MAX)
955	{
956	rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GuestIdtr.pIdt);
957	AssertRCReturn(rc, rc);
958	}
959	/* limit is including */
960	rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_WRITE, IDTR.pIdt, IDTR.pIdt + IDTR.cbIdt /* already inclusive */,
961	0, trpmR3GuestIDTWriteHandler, "trpmRCGuestIDTWriteHandler", 0, "Guest IDT write access handler");
962
963	if (rc == VERR_PGM_HANDLER_VIRTUAL_CONFLICT)
964	{
965	/* Could be a conflict with CSAM */
966	CSAMR3RemovePage(pVM, IDTR.pIdt);
967	if (PAGE_ADDRESS(IDTR.pIdt) != PAGE_ADDRESS(IDTR.pIdt + IDTR.cbIdt))
968	CSAMR3RemovePage(pVM, IDTR.pIdt + IDTR.cbIdt);
969
970	rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_WRITE, IDTR.pIdt, IDTR.pIdt + IDTR.cbIdt /* already inclusive */,
971	0, trpmR3GuestIDTWriteHandler, "trpmRCGuestIDTWriteHandler", 0, "Guest IDT write access handler");
972	}
973
974	AssertRCReturn(rc, rc);
975	}
976
977	/* Update saved Guest IDTR. */
978	pVM->trpm.s.GuestIdtr = IDTR;
979	}
980	#endif
981
982	/*
983	* Sync the interrupt gate.
984	* Should probably check/sync the others too, but for now we'll handle that in #GP.
985	*/
986	X86DESC Idte3;
987	rc = PGMPhysSimpleReadGCPtr(pVM, &Idte3, IDTR.pIdt + sizeof(Idte3) * 3, sizeof(Idte3));
988	if (RT_FAILURE(rc))
989	{
990	AssertMsgRC(rc, ("Failed to read IDT[3]! rc=%Rrc\n", rc));
991	return DBGFSTOP(pVM);
992	}
993	AssertRCReturn(rc, rc);
994	if (fRawRing0)
995	pVM->trpm.s.aIdt[3].Gen.u2DPL = RT_MAX(Idte3.Gen.u2Dpl, 1);
996	else
997	pVM->trpm.s.aIdt[3].Gen.u2DPL = Idte3.Gen.u2Dpl;
998
999	/*
1000	* Clear the FF and we're done.
1001	*/
1002	VM_FF_CLEAR(pVM, VM_FF_TRPM_SYNC_IDT);
1003	STAM_PROFILE_STOP(&pVM->trpm.s.StatSyncIDT, a);
1004	return VINF_SUCCESS;
1005	}
1006
1007
1008	/**
1009	* Disable IDT monitoring and syncing
1010	*
1011	* @param pVM The VM to operate on.
1012	*/
1013	VMMR3DECL(void) TRPMR3DisableMonitoring(PVM pVM)
1014	{
1015	/*
1016	* Deregister any virtual handlers.
1017	*/
1018	#ifdef TRPM_TRACK_GUEST_IDT_CHANGES
1019	if (pVM->trpm.s.GuestIdtr.pIdt != RTRCPTR_MAX)
1020	{
1021	if (!pVM->trpm.s.fSafeToDropGuestIDTMonitoring)
1022	{
1023	int rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GuestIdtr.pIdt);
1024	AssertRC(rc);
1025	}
1026	pVM->trpm.s.GuestIdtr.pIdt = RTRCPTR_MAX;
1027	}
1028	pVM->trpm.s.GuestIdtr.cbIdt = 0;
1029	#endif
1030
1031	#ifdef TRPM_TRACK_SHADOW_IDT_CHANGES
1032	if (pVM->trpm.s.pvMonShwIdtRC != RTRCPTR_MAX)
1033	{
1034	int rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.pvMonShwIdtRC);
1035	AssertRC(rc);
1036	pVM->trpm.s.pvMonShwIdtRC = RTRCPTR_MAX;
1037	}
1038	#endif
1039
1040	VM_FF_CLEAR(pVM, VM_FF_TRPM_SYNC_IDT);
1041
1042	pVM->trpm.s.fDisableMonitoring = true;
1043	}
1044
1045
1046	/**
1047	* \#PF Handler callback for virtual access handler ranges.
1048	*
1049	* Important to realize that a physical page in a range can have aliases, and
1050	* for ALL and WRITE handlers these will also trigger.
1051	*
1052	* @returns VINF_SUCCESS if the handler have carried out the operation.
1053	* @returns VINF_PGM_HANDLER_DO_DEFAULT if the caller should carry out the access operation.
1054	* @param pVM VM Handle.
1055	* @param GCPtr The virtual address the guest is writing to. (not correct if it's an alias!)
1056	* @param pvPtr The HC mapping of that address.
1057	* @param pvBuf What the guest is reading/writing.
1058	* @param cbBuf How much it's reading/writing.
1059	* @param enmAccessType The access type.
1060	* @param pvUser User argument.
1061	*/
1062	static DECLCALLBACK(int) trpmR3GuestIDTWriteHandler(PVM pVM, RTGCPTR GCPtr, void pvPtr, void pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser)
1063	{
1064	Assert(enmAccessType == PGMACCESSTYPE_WRITE);
1065	Log(("trpmR3GuestIDTWriteHandler: write to %RGv size %d\n", GCPtr, cbBuf));
1066	VM_FF_SET(pVM, VM_FF_TRPM_SYNC_IDT);
1067	return VINF_PGM_HANDLER_DO_DEFAULT;
1068	}
1069
1070
1071	/**
1072	* Clear passthrough interrupt gate handler (reset to default handler)
1073	*
1074	* @returns VBox status code.
1075	* @param pVM The VM to operate on.
1076	* @param iTrap Trap/interrupt gate number.
1077	*/
1078	VMMR3DECL(int) trpmR3ClearPassThroughHandler(PVM pVM, unsigned iTrap)
1079	{
1080	/** @todo cleanup trpmR3ClearPassThroughHandler()! */
1081	RTRCPTR aGCPtrs[TRPM_HANDLER_MAX];
1082	int rc;
1083
1084	memset(aGCPtrs, 0, sizeof(aGCPtrs));
1085
1086	rc = PDMR3LdrGetSymbolRC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerInterupt", &aGCPtrs[TRPM_HANDLER_INT]);
1087	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerInterupt in VMMGC.gc!\n"));
1088
1089	if ( iTrap < TRPM_HANDLER_INT_BASE
1090	\|\| iTrap >= RT_ELEMENTS(pVM->trpm.s.aIdt))
1091	{
1092	AssertMsg(iTrap < TRPM_HANDLER_INT_BASE, ("Illegal gate number %#x!\n", iTrap));
1093	return VERR_INVALID_PARAMETER;
1094	}
1095	memcpy(&pVM->trpm.s.aIdt[iTrap], &g_aIdt[iTrap], sizeof(pVM->trpm.s.aIdt[0]));
1096
1097	/* Unmark it for relocation purposes. */
1098	ASMBitClear(&pVM->trpm.s.au32IdtPatched[0], iTrap);
1099
1100	RTSEL SelCS = CPUMGetHyperCS(pVM);
1101	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
1102	PVBOXIDTE_GENERIC pIdteTemplate = &g_aIdt[iTrap];
1103	if (pIdte->Gen.u1Present)
1104	{
1105	Assert(pIdteTemplate->u16OffsetLow == TRPM_HANDLER_INT);
1106	Assert(sizeof(RTRCPTR) == sizeof(aGCPtrs[0]));
1107	RTRCPTR Offset = (RTRCPTR)aGCPtrs[pIdteTemplate->u16OffsetLow];
1108
1109	/*
1110	* Generic handlers have different entrypoints for each possible
1111	* vector number. These entrypoints make a sort of an array with
1112	* 8 byte entries where the vector number is the index.
1113	* See TRPMGCHandlersA.asm for details.
1114	*/
1115	Offset += iTrap * 8;
1116
1117	if (pIdte->Gen.u5Type2 != VBOX_IDTE_TYPE2_TASK)
1118	{
1119	pIdte->Gen.u16OffsetLow = Offset & 0xffff;
1120	pIdte->Gen.u16OffsetHigh = Offset >> 16;
1121	pIdte->Gen.u16SegSel = SelCS;
1122	}
1123	}
1124
1125	return VINF_SUCCESS;
1126	}
1127
1128
1129	/**
1130	* Check if address is a gate handler (interrupt or trap).
1131	*
1132	* @returns gate nr or ~0 is not found
1133	*
1134	* @param pVM VM handle.
1135	* @param GCPtr GC address to check.
1136	*/
1137	VMMR3DECL(uint32_t) TRPMR3QueryGateByHandler(PVM pVM, RTRCPTR GCPtr)
1138	{
1139	for (uint32_t iTrap = 0; iTrap < RT_ELEMENTS(pVM->trpm.s.aGuestTrapHandler); iTrap++)
1140	{
1141	if (pVM->trpm.s.aGuestTrapHandler[iTrap] == GCPtr)
1142	return iTrap;
1143
1144	/* redundant */
1145	if (ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], iTrap))
1146	{
1147	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
1148	RTGCPTR pHandler = VBOXIDTE_OFFSET(*pIdte);
1149
1150	if (pHandler == GCPtr)
1151	return iTrap;
1152	}
1153	}
1154	return ~0;
1155	}
1156
1157
1158	/**
1159	* Get guest trap/interrupt gate handler
1160	*
1161	* @returns Guest trap handler address or TRPM_INVALID_HANDLER if none installed
1162	* @param pVM The VM to operate on.
1163	* @param iTrap Interrupt/trap number.
1164	*/
1165	VMMR3DECL(RTRCPTR) TRPMR3GetGuestTrapHandler(PVM pVM, unsigned iTrap)
1166	{
1167	AssertReturn(iTrap < RT_ELEMENTS(pVM->trpm.s.aIdt), TRPM_INVALID_HANDLER);
1168
1169	return pVM->trpm.s.aGuestTrapHandler[iTrap];
1170	}
1171
1172
1173	/**
1174	* Set guest trap/interrupt gate handler
1175	* Used for setting up trap gates used for kernel calls.
1176	*
1177	* @returns VBox status code.
1178	* @param pVM The VM to operate on.
1179	* @param iTrap Interrupt/trap number.
1180	* @param pHandler GC handler pointer
1181	*/
1182	VMMR3DECL(int) TRPMR3SetGuestTrapHandler(PVM pVM, unsigned iTrap, RTRCPTR pHandler)
1183	{
1184	/*
1185	* Validate.
1186	*/
1187	if (iTrap >= RT_ELEMENTS(pVM->trpm.s.aIdt))
1188	{
1189	AssertMsg(iTrap < TRPM_HANDLER_INT_BASE, ("Illegal gate number %d!\n", iTrap));
1190	return VERR_INVALID_PARAMETER;
1191	}
1192
1193	AssertReturn(pHandler == TRPM_INVALID_HANDLER \|\| PATMIsPatchGCAddr(pVM, pHandler), VERR_INVALID_PARAMETER);
1194
1195	uint16_t cbIDT;
1196	RTGCPTR GCPtrIDT = CPUMGetGuestIDTR(pVM, &cbIDT);
1197	if (iTrap * sizeof(VBOXIDTE) >= cbIDT)
1198	return VERR_INVALID_PARAMETER; /* Silently ignore out of range requests. */
1199
1200	if (pHandler == TRPM_INVALID_HANDLER)
1201	{
1202	/* clear trap handler */
1203	Log(("TRPMR3SetGuestTrapHandler: clear handler %x\n", iTrap));
1204	return trpmClearGuestTrapHandler(pVM, iTrap);
1205	}
1206
1207	/*
1208	* Read the guest IDT entry.
1209	*/
1210	VBOXIDTE GuestIdte;
1211	int rc = PGMPhysSimpleReadGCPtr(pVM, &GuestIdte, GCPtrIDT + iTrap * sizeof(GuestIdte), sizeof(GuestIdte));
1212	if (RT_FAILURE(rc))
1213	{
1214	AssertMsgRC(rc, ("Failed to read IDTE! rc=%Rrc\n", rc));
1215	return rc;
1216	}
1217
1218	if (EMIsRawRing0Enabled(pVM))
1219	{
1220	/*
1221	* Only replace handlers for which we are 100% certain there won't be
1222	* any host interrupts.
1223	*
1224	* 0x2E is safe on Windows because it's the system service interrupt gate. Not
1225	* quite certain if this is safe or not on 64-bit Vista, it probably is.
1226	*
1227	* 0x80 is safe on Linux because it's the syscall vector and is part of the
1228	* 32-bit usermode ABI. 64-bit Linux (usually) supports 32-bit processes
1229	* and will therefor never assign hardware interrupts to 0x80.
1230	*
1231	* Exactly why 0x80 is safe on 32-bit Windows is a bit hazy, but it seems
1232	* to work ok... However on 64-bit Vista (SMP?) is doesn't work reliably.
1233	* Booting Linux/BSD guest will cause system lockups on most of the computers.
1234	* -> Update: It seems gate 0x80 is not safe on 32-bits Windows either. See
1235	* defect #3604.
1236	*
1237	* PORTME - Check if your host keeps any of these gates free from hw ints.
1238	*
1239	* Note! SELMR3SyncTSS also has code related to this interrupt handler replacing.
1240	*/
1241	/** @todo handle those dependencies better! */
1242	/** @todo Solve this in a proper manner. see defect #1186 */
1243	#if defined(RT_OS_WINDOWS) && defined(RT_ARCH_X86)
1244	if (iTrap == 0x2E)
1245	#elif defined(RT_OS_LINUX)
1246	if (iTrap == 0x80)
1247	#else
1248	if (0)
1249	#endif
1250	{
1251	if ( GuestIdte.Gen.u1Present
1252	&& ( GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_TRAP_32
1253	\|\| GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32)
1254	&& GuestIdte.Gen.u2DPL == 3)
1255	{
1256	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
1257
1258	GuestIdte.Gen.u5Type2 = VBOX_IDTE_TYPE2_TRAP_32;
1259	GuestIdte.Gen.u16OffsetHigh = pHandler >> 16;
1260	GuestIdte.Gen.u16OffsetLow = pHandler & 0xFFFF;
1261	GuestIdte.Gen.u16SegSel \|= 1; //ring 1
1262	*pIdte = GuestIdte;
1263
1264	/* Mark it for relocation purposes. */
1265	ASMBitSet(&pVM->trpm.s.au32IdtPatched[0], iTrap);
1266
1267	/* Also store it in our guest trap array. */
1268	pVM->trpm.s.aGuestTrapHandler[iTrap] = pHandler;
1269
1270	Log(("Setting trap handler %x to %08X (direct)\n", iTrap, pHandler));
1271	return VINF_SUCCESS;
1272	}
1273	/* ok, let's try to install a trampoline handler then. */
1274	}
1275	}
1276
1277	if ( GuestIdte.Gen.u1Present
1278	&& ( GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_TRAP_32
1279	\|\| GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32)
1280	&& (GuestIdte.Gen.u2DPL == 3 \|\| GuestIdte.Gen.u2DPL == 0))
1281	{
1282	/*
1283	* Save handler which can be used for a trampoline call inside the GC
1284	*/
1285	Log(("Setting trap handler %x to %08X\n", iTrap, pHandler));
1286	pVM->trpm.s.aGuestTrapHandler[iTrap] = pHandler;
1287	return VINF_SUCCESS;
1288	}
1289	return VERR_INVALID_PARAMETER;
1290	}
1291
1292
1293	/**
1294	* Check if address is a gate handler (interrupt/trap/task/anything).
1295	*
1296	* @returns True is gate handler, false if not.
1297	*
1298	* @param pVM VM handle.
1299	* @param GCPtr GC address to check.
1300	*/
1301	VMMR3DECL(bool) TRPMR3IsGateHandler(PVM pVM, RTRCPTR GCPtr)
1302	{
1303	/*
1304	* Read IDTR and calc last entry.
1305	*/
1306	uint16_t cbIDT;
1307	RTGCPTR GCPtrIDTE = CPUMGetGuestIDTR(pVM, &cbIDT);
1308	unsigned cEntries = (cbIDT + 1) / sizeof(VBOXIDTE);
1309	if (!cEntries)
1310	return false;
1311	RTGCPTR GCPtrIDTELast = GCPtrIDTE + (cEntries - 1) * sizeof(VBOXIDTE);
1312
1313	/*
1314	* Outer loop: interate pages.
1315	*/
1316	while (GCPtrIDTE <= GCPtrIDTELast)
1317	{
1318	/*
1319	* Convert this page to a HC address.
1320	* (This function checks for not-present pages.)
1321	*/
1322	PVBOXIDTE pIDTE;
1323	int rc = PGMPhysGCPtr2R3Ptr(pVM, GCPtrIDTE, (void **)&pIDTE);
1324	if (RT_SUCCESS(rc))
1325	{
1326	/*
1327	* Inner Loop: Iterate the data on this page looking for an entry equal to GCPtr.
1328	* N.B. Member of the Flat Earth Society...
1329	*/
1330	while (GCPtrIDTE <= GCPtrIDTELast)
1331	{
1332	if (pIDTE->Gen.u1Present)
1333	{
1334	RTRCPTR GCPtrHandler = VBOXIDTE_OFFSET(*pIDTE);
1335	if (GCPtr == GCPtrHandler)
1336	return true;
1337	}
1338
1339	/* next entry */
1340	if ((GCPtrIDTE & PAGE_OFFSET_MASK) + sizeof(VBOXIDTE) >= PAGE_SIZE)
1341	{
1342	AssertMsg(!(GCPtrIDTE & (sizeof(VBOXIDTE) - 1)),
1343	("IDT is crossing pages and it's not aligned! GCPtrIDTE=%#x cbIDT=%#x\n", GCPtrIDTE, cbIDT));
1344	GCPtrIDTE += sizeof(VBOXIDTE);
1345	break;
1346	}
1347	GCPtrIDTE += sizeof(VBOXIDTE);
1348	pIDTE++;
1349	}
1350	}
1351	else
1352	{
1353	/* Skip to the next page (if any). Take care not to wrap around the address space. */
1354	if ((GCPtrIDTELast >> PAGE_SHIFT) == (GCPtrIDTE >> PAGE_SHIFT))
1355	return false;
1356	GCPtrIDTE = RT_ALIGN_T(GCPtrIDTE, PAGE_SIZE, RTGCPTR) + PAGE_SIZE + (GCPtrIDTE & (sizeof(VBOXIDTE) - 1));
1357	}
1358	}
1359	return false;
1360	}
1361
1362
1363	/**
1364	* Inject event (such as external irq or trap)
1365	*
1366	* @returns VBox status code.
1367	* @param pVM The VM to operate on.
1368	* @param enmEvent Trpm event type
1369	*/
1370	VMMR3DECL(int) TRPMR3InjectEvent(PVM pVM, TRPMEVENT enmEvent)
1371	{
1372	PCPUMCTX pCtx;
1373	int rc;
1374
1375	pCtx = CPUMQueryGuestCtxPtr(pVM);
1376	Assert(!PATMIsPatchGCAddr(pVM, (RTGCPTR)pCtx->eip));
1377	Assert(!VM_FF_ISSET(pVM, VM_FF_INHIBIT_INTERRUPTS));
1378
1379	/* Currently only useful for external hardware interrupts. */
1380	Assert(enmEvent == TRPM_HARDWARE_INT);
1381
1382	if (REMR3QueryPendingInterrupt(pVM) == REM_NO_PENDING_IRQ)
1383	{
1384	#ifdef TRPM_FORWARD_TRAPS_IN_GC
1385
1386	# ifdef LOG_ENABLED
1387	DBGFR3InfoLog(pVM, "cpumguest", "TRPMInject");
1388	DBGFR3DisasInstrCurrentLog(pVM, "TRPMInject");
1389	# endif
1390
1391	uint8_t u8Interrupt;
1392	rc = PDMGetInterrupt(pVM, &u8Interrupt);
1393	Log(("TRPMR3InjectEvent: u8Interrupt=%d (%#x) rc=%Rrc\n", u8Interrupt, u8Interrupt, rc));
1394	if (RT_SUCCESS(rc))
1395	{
1396	if (HWACCMR3IsActive(pVM))
1397	{
1398	rc = TRPMAssertTrap(pVM, u8Interrupt, enmEvent);
1399	AssertRC(rc);
1400	STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1401	return VINF_EM_RESCHEDULE_HWACC;
1402	}
1403	/* If the guest gate is not patched, then we will check (again) if we can patch it. */
1404	if (pVM->trpm.s.aGuestTrapHandler[u8Interrupt] == TRPM_INVALID_HANDLER)
1405	{
1406	CSAMR3CheckGates(pVM, u8Interrupt, 1);
1407	Log(("TRPMR3InjectEvent: recheck gate %x -> valid=%d\n", u8Interrupt, TRPMR3GetGuestTrapHandler(pVM, u8Interrupt) != TRPM_INVALID_HANDLER));
1408	}
1409
1410	if (pVM->trpm.s.aGuestTrapHandler[u8Interrupt] != TRPM_INVALID_HANDLER)
1411	{
1412	/* Must check pending forced actions as our IDT or GDT might be out of sync */
1413	EMR3CheckRawForcedActions(pVM);
1414
1415	/* There's a handler -> let's execute it in raw mode */
1416	rc = TRPMForwardTrap(pVM, CPUMCTX2CORE(pCtx), u8Interrupt, 0, TRPM_TRAP_NO_ERRORCODE, enmEvent, -1);
1417	if (rc == VINF_SUCCESS /* Don't use RT_SUCCESS */)
1418	{
1419	Assert(!VM_FF_ISPENDING(pVM, VM_FF_SELM_SYNC_GDT \| VM_FF_SELM_SYNC_LDT \| VM_FF_TRPM_SYNC_IDT \| VM_FF_SELM_SYNC_TSS));
1420
1421	STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1422	return VINF_EM_RESCHEDULE_RAW;
1423	}
1424	}
1425	else
1426	STAM_COUNTER_INC(&pVM->trpm.s.StatForwardFailNoHandler);
1427	REMR3NotifyPendingInterrupt(pVM, u8Interrupt);
1428	}
1429	else
1430	AssertRC(rc);
1431	#else
1432	if (HWACCMR3IsActive(pVM))
1433	{
1434	uint8_t u8Interrupt;
1435	rc = PDMGetInterrupt(pVM, &u8Interrupt);
1436	Log(("TRPMR3InjectEvent: u8Interrupt=%d (%#x) rc=%Rrc\n", u8Interrupt, u8Interrupt, rc));
1437	if (RT_SUCCESS(rc))
1438	{
1439	rc = TRPMAssertTrap(pVM, u8Interrupt, TRPM_HARDWARE_INT);
1440	AssertRC(rc);
1441	STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1442	return VINF_EM_RESCHEDULE_HWACC;
1443	}
1444	}
1445	else
1446	AssertRC(rc);
1447	#endif
1448	}
1449	/** @todo check if it's safe to translate the patch address to the original guest address.
1450	* this implies a safe state in translated instructions and should take sti successors into account (instruction fusing)
1451	*/
1452	/* Note: if it's a PATM address, then we'll go back to raw mode regardless of the return code below. */
1453
1454	/* Fall back to the recompiler */
1455	return VINF_EM_RESCHEDULE_REM; /* (Heed the halted state if this is changed!) */
1456	}
1457

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source: vbox/trunk/src/VBox/VMM/TRPM.cpp@ 16774

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