TRPM.cpp@ 18617

Last change on this file since 18617 was 18617, checked in by vboxsync, 16 years ago
PGM,EM: Handle out of memory situations more gracefully - part 1. New debugger commands: .pgmerror and .pgmerroroff.
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 73.0 KB

Line
1	/* $Id: TRPM.cpp 18617 2009-04-01 22:11:29Z 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	PCVBOXIDTE pIDTE;
1323	PGMPAGEMAPLOCK Lock;
1324	int rc = PGMPhysGCPtr2CCPtrReadOnly(pVM, GCPtrIDTE, (const void **)&pIDTE, &Lock);
1325	if (RT_SUCCESS(rc))
1326	{
1327	/*
1328	* Inner Loop: Iterate the data on this page looking for an entry equal to GCPtr.
1329	* N.B. Member of the Flat Earth Society...
1330	*/
1331	while (GCPtrIDTE <= GCPtrIDTELast)
1332	{
1333	if (pIDTE->Gen.u1Present)
1334	{
1335	RTRCPTR GCPtrHandler = VBOXIDTE_OFFSET(*pIDTE);
1336	if (GCPtr == GCPtrHandler)
1337	{
1338	PGMPhysReleasePageMappingLock(pVM, &Lock);
1339	return true;
1340	}
1341	}
1342
1343	/* next entry */
1344	if ((GCPtrIDTE & PAGE_OFFSET_MASK) + sizeof(VBOXIDTE) >= PAGE_SIZE)
1345	{
1346	AssertMsg(!(GCPtrIDTE & (sizeof(VBOXIDTE) - 1)),
1347	("IDT is crossing pages and it's not aligned! GCPtrIDTE=%#x cbIDT=%#x\n", GCPtrIDTE, cbIDT));
1348	GCPtrIDTE += sizeof(VBOXIDTE);
1349	break;
1350	}
1351	GCPtrIDTE += sizeof(VBOXIDTE);
1352	pIDTE++;
1353	}
1354	PGMPhysReleasePageMappingLock(pVM, &Lock);
1355	}
1356	else
1357	{
1358	/* Skip to the next page (if any). Take care not to wrap around the address space. */
1359	if ((GCPtrIDTELast >> PAGE_SHIFT) == (GCPtrIDTE >> PAGE_SHIFT))
1360	return false;
1361	GCPtrIDTE = RT_ALIGN_T(GCPtrIDTE, PAGE_SIZE, RTGCPTR) + PAGE_SIZE + (GCPtrIDTE & (sizeof(VBOXIDTE) - 1));
1362	}
1363	}
1364	return false;
1365	}
1366
1367
1368	/**
1369	* Inject event (such as external irq or trap)
1370	*
1371	* @returns VBox status code.
1372	* @param pVM The VM to operate on.
1373	* @param enmEvent Trpm event type
1374	*/
1375	VMMR3DECL(int) TRPMR3InjectEvent(PVM pVM, TRPMEVENT enmEvent)
1376	{
1377	PCPUMCTX pCtx;
1378	int rc;
1379
1380	pCtx = CPUMQueryGuestCtxPtr(pVM);
1381	Assert(!PATMIsPatchGCAddr(pVM, (RTGCPTR)pCtx->eip));
1382	Assert(!VM_FF_ISSET(pVM, VM_FF_INHIBIT_INTERRUPTS));
1383
1384	/* Currently only useful for external hardware interrupts. */
1385	Assert(enmEvent == TRPM_HARDWARE_INT);
1386
1387	if (REMR3QueryPendingInterrupt(pVM) == REM_NO_PENDING_IRQ)
1388	{
1389	#ifdef TRPM_FORWARD_TRAPS_IN_GC
1390
1391	# ifdef LOG_ENABLED
1392	DBGFR3InfoLog(pVM, "cpumguest", "TRPMInject");
1393	DBGFR3DisasInstrCurrentLog(pVM, "TRPMInject");
1394	# endif
1395
1396	uint8_t u8Interrupt;
1397	rc = PDMGetInterrupt(pVM, &u8Interrupt);
1398	Log(("TRPMR3InjectEvent: u8Interrupt=%d (%#x) rc=%Rrc\n", u8Interrupt, u8Interrupt, rc));
1399	if (RT_SUCCESS(rc))
1400	{
1401	if (HWACCMR3IsActive(pVM))
1402	{
1403	rc = TRPMAssertTrap(pVM, u8Interrupt, enmEvent);
1404	AssertRC(rc);
1405	STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1406	return VINF_EM_RESCHEDULE_HWACC;
1407	}
1408	/* If the guest gate is not patched, then we will check (again) if we can patch it. */
1409	if (pVM->trpm.s.aGuestTrapHandler[u8Interrupt] == TRPM_INVALID_HANDLER)
1410	{
1411	CSAMR3CheckGates(pVM, u8Interrupt, 1);
1412	Log(("TRPMR3InjectEvent: recheck gate %x -> valid=%d\n", u8Interrupt, TRPMR3GetGuestTrapHandler(pVM, u8Interrupt) != TRPM_INVALID_HANDLER));
1413	}
1414
1415	if (pVM->trpm.s.aGuestTrapHandler[u8Interrupt] != TRPM_INVALID_HANDLER)
1416	{
1417	/* Must check pending forced actions as our IDT or GDT might be out of sync */
1418	rc = EMR3CheckRawForcedActions(pVM);
1419	if (rc == VINF_SUCCESS)
1420	{
1421	/* There's a handler -> let's execute it in raw mode */
1422	rc = TRPMForwardTrap(pVM, CPUMCTX2CORE(pCtx), u8Interrupt, 0, TRPM_TRAP_NO_ERRORCODE, enmEvent, -1);
1423	if (rc == VINF_SUCCESS /* Don't use RT_SUCCESS */)
1424	{
1425	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));
1426
1427	STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1428	return VINF_EM_RESCHEDULE_RAW;
1429	}
1430	}
1431	}
1432	else
1433	STAM_COUNTER_INC(&pVM->trpm.s.StatForwardFailNoHandler);
1434	REMR3NotifyPendingInterrupt(pVM, u8Interrupt);
1435	}
1436	else
1437	AssertRC(rc);
1438	#else
1439	if (HWACCMR3IsActive(pVM))
1440	{
1441	uint8_t u8Interrupt;
1442	rc = PDMGetInterrupt(pVM, &u8Interrupt);
1443	Log(("TRPMR3InjectEvent: u8Interrupt=%d (%#x) rc=%Rrc\n", u8Interrupt, u8Interrupt, rc));
1444	if (RT_SUCCESS(rc))
1445	{
1446	rc = TRPMAssertTrap(pVM, u8Interrupt, TRPM_HARDWARE_INT);
1447	AssertRC(rc);
1448	STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1449	return VINF_EM_RESCHEDULE_HWACC;
1450	}
1451	}
1452	else
1453	AssertRC(rc);
1454	#endif
1455	}
1456	/** @todo check if it's safe to translate the patch address to the original guest address.
1457	* this implies a safe state in translated instructions and should take sti successors into account (instruction fusing)
1458	*/
1459	/* Note: if it's a PATM address, then we'll go back to raw mode regardless of the return code below. */
1460
1461	/* Fall back to the recompiler */
1462	return VINF_EM_RESCHEDULE_REM; /* (Heed the halted state if this is changed!) */
1463	}
1464

Note: See TracBrowser for help on using the repository browser.

source: vbox/trunk/src/VBox/VMM/TRPM.cpp@ 18617

Download in other formats: