TRPM.cpp@ 3696

Last change on this file since 3696 was 3696, checked in by vboxsync, 17 years ago
double underscore cleanup.
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 69.6 KB

Line
1	/* $Id: TRPM.cpp 3696 2007-07-18 17:00:33Z vboxsync $ */
2	/** @file
3	* TRPM - The Trap Monitor
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 innotek GmbH
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 as published by the Free Software Foundation,
13	* in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
14	* distribution. VirtualBox OSE is distributed in the hope that it will
15	* be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* If you received this file as part of a commercial VirtualBox
18	* distribution, then only the terms of your commercial VirtualBox
19	* license agreement apply instead of the previous paragraph.
20	*/
21
22
23	/** @page pg_trpm TRPM - The Trap Monitor
24	*
25	* The Trap Monitor (TRPM) is responsible for all trap and interrupt
26	* handling in the VMM.
27	*
28	* Interrupts occuring in GC will be routed to the HC and reassert there. TRPM
29	* makes the assumption that the VMM or Guest will not cause hardware
30	* interrupts to occur.
31	*
32	* Traps will be passed to a list of registered trap handlers which will
33	* check and see if they are the responsible part for the trap. If no handler
34	* was found the default action is to pass the trap on the Guest OS. Trap
35	* handlers may raise a Guest OS trap as a result of the trap handling.
36	* Statistics will be maintained so the trap handler list can be resorted
37	* every now and then to examin handlers in the optimal order.
38	*
39	* If a trap happens inside the VMM (Guest Context) the TRPM will take the
40	* shortest path back to Ring-3 Host Context and brutally destroy the VM.
41	*
42	* The TRPM will have interfaces to enable devices to assert interrupts
43	* in the guest, these interfaces are multithreaded and availble from
44	* all contexts. This is to allow devices to have use worker threads.
45	*
46	*/
47
48
49
50	/*******************************************************************************
51	* Header Files *
52	*******************************************************************************/
53	#define LOG_GROUP LOG_GROUP_TRPM
54	#include <VBox/trpm.h>
55	#include <VBox/cpum.h>
56	#include <VBox/selm.h>
57	#include <VBox/pdm.h>
58	#include <VBox/pgm.h>
59	#include <VBox/mm.h>
60	#include <VBox/stam.h>
61	#include <VBox/csam.h>
62	#include <VBox/patm.h>
63	#include "TRPMInternal.h"
64	#include <VBox/vm.h>
65	#include <VBox/em.h>
66	#include <VBox/rem.h>
67	#include <VBox/hwaccm.h>
68
69	#include <VBox/err.h>
70	#include <VBox/param.h>
71	#include <VBox/log.h>
72	#include <iprt/assert.h>
73	#include <iprt/asm.h>
74	#include <iprt/string.h>
75	#include <iprt/alloc.h>
76
77
78	/*******************************************************************************
79	* Structures and Typedefs *
80	*******************************************************************************/
81	/**
82	* Trap handler function.
83	* @todo need to specialize this as we go along.
84	*/
85	typedef enum TRPMHANDLER
86	{
87	/** Generic Interrupt handler. */
88	TRPM_HANDLER_INT = 0,
89	/** Generic Trap handler. */
90	TRPM_HANDLER_TRAP,
91	/** Trap 8 (\#DF) handler. */
92	TRPM_HANDLER_TRAP_08,
93	/** Trap 12 (\#MC) handler. */
94	TRPM_HANDLER_TRAP_12,
95	/** Max. */
96	TRPM_HANDLER_MAX
97	} TRPMHANDLER, *PTRPMHANDLER;
98
99
100	/*******************************************************************************
101	* Global Variables *
102	*******************************************************************************/
103	/** Preinitialized IDT.
104	* The u16OffsetLow is a value of the TRPMHANDLER enum which TRPMR3Relocate()
105	* will use to pick the right address. The u16SegSel is always VMM CS.
106	*/
107	static VBOXIDTE_GENERIC g_aIdt[256] =
108	{
109	/* special trap handler - still, this is an interrupt gate not a trap gate... */
110	#define IDTE_TRAP(enm) { (unsigned)enm, 0, 0, VBOX_IDTE_TYPE1, VBOX_IDTE_TYPE2_INT_32, 0, 1, 0 }
111	/* generic trap handler. */
112	#define IDTE_TRAP_GEN() IDTE_TRAP(TRPM_HANDLER_TRAP)
113	/* special interrupt handler. */
114	#define IDTE_INT(enm) { (unsigned)enm, 0, 0, VBOX_IDTE_TYPE1, VBOX_IDTE_TYPE2_INT_32, 0, 1, 0 }
115	/* generic interrupt handler. */
116	#define IDTE_INT_GEN() IDTE_INT(TRPM_HANDLER_INT)
117	/* special task gate IDT entry (for critical exceptions like #DF). */
118	#define IDTE_TASK(enm) { (unsigned)enm, 0, 0, VBOX_IDTE_TYPE1, VBOX_IDTE_TYPE2_TASK, 0, 1, 0 }
119	/* draft, fixme later when the handler is written. */
120	#define IDTE_RESERVED() { 0, 0, 0, 0, 0, 0, 0, 0 }
121
122	/* N - M M - T - C - D i */
123	/* o - n o - y - o - e p */
124	/* - e n - p - d - s t */
125	/* - i - e - e - c . */
126	/* - c - - - r */
127	/* ============================================================= */
128	IDTE_TRAP_GEN(), /* 0 - #DE - F - N - Divide error */
129	IDTE_TRAP_GEN(), /* 1 - #DB - F/T - N - Single step, INT 1 instruction */
130	#ifdef VBOX_WITH_NMI
131	IDTE_TRAP_GEN(), /* 2 - - I - N - Non-Maskable Interrupt (NMI) */
132	#else
133	IDTE_INT_GEN(), /* 2 - - I - N - Non-Maskable Interrupt (NMI) */
134	#endif
135	IDTE_TRAP_GEN(), /* 3 - #BP - T - N - Breakpoint, INT 3 instruction. */
136	IDTE_TRAP_GEN(), /* 4 - #OF - T - N - Overflow, INTO instruction. */
137	IDTE_TRAP_GEN(), /* 5 - #BR - F - N - BOUND Range Exceeded, BOUND instruction. */
138	IDTE_TRAP_GEN(), /* 6 - #UD - F - N - Undefined(/Invalid) Opcode. */
139	IDTE_TRAP_GEN(), /* 7 - #NM - F - N - Device not available, FP or (F)WAIT instruction. */
140	IDTE_TASK(TRPM_HANDLER_TRAP_08), /* 8 - #DF - A - 0 - Double fault. */
141	IDTE_TRAP_GEN(), /* 9 - - F - N - Coprocessor Segment Overrun (obsolete). */
142	IDTE_TRAP_GEN(), /* a - #TS - F - Y - Invalid TSS, Taskswitch or TSS access. */
143	IDTE_TRAP_GEN(), /* b - #NP - F - Y - Segment not present. */
144	IDTE_TRAP_GEN(), /* c - #SS - F - Y - Stack-Segment fault. */
145	IDTE_TRAP_GEN(), /* d - #GP - F - Y - General protection fault. */
146	IDTE_TRAP_GEN(), /* e - #PF - F - Y - Page fault. - interrupt gate!!! */
147	IDTE_RESERVED(), /* f - - - - Intel Reserved. Do not use. */
148	IDTE_TRAP_GEN(), /* 10 - #MF - F - N - x86 FPU Floating-Point Error (Math fault), FP or (F)WAIT instruction. */
149	IDTE_TRAP_GEN(), /* 11 - #AC - F - 0 - Alignment Check. */
150	IDTE_TRAP(TRPM_HANDLER_TRAP_12), /* 12 - #MC - A - N - Machine Check. */
151	IDTE_TRAP_GEN(), /* 13 - #XF - F - N - SIMD Floating-Point Exception. */
152	IDTE_RESERVED(), /* 14 - - - - Intel Reserved. Do not use. */
153	IDTE_RESERVED(), /* 15 - - - - Intel Reserved. Do not use. */
154	IDTE_RESERVED(), /* 16 - - - - Intel Reserved. Do not use. */
155	IDTE_RESERVED(), /* 17 - - - - Intel Reserved. Do not use. */
156	IDTE_RESERVED(), /* 18 - - - - Intel Reserved. Do not use. */
157	IDTE_RESERVED(), /* 19 - - - - Intel Reserved. Do not use. */
158	IDTE_RESERVED(), /* 1a - - - - Intel Reserved. Do not use. */
159	IDTE_RESERVED(), /* 1b - - - - Intel Reserved. Do not use. */
160	IDTE_RESERVED(), /* 1c - - - - Intel Reserved. Do not use. */
161	IDTE_RESERVED(), /* 1d - - - - Intel Reserved. Do not use. */
162	IDTE_RESERVED(), /* 1e - - - - Intel Reserved. Do not use. */
163	IDTE_RESERVED(), /* 1f - - - - Intel Reserved. Do not use. */
164	IDTE_INT_GEN(), /* 20 - - I - - User defined Interrupts, external of INT n. */
165	IDTE_INT_GEN(), /* 21 - - I - - User defined Interrupts, external of INT n. */
166	IDTE_INT_GEN(), /* 22 - - I - - User defined Interrupts, external of INT n. */
167	IDTE_INT_GEN(), /* 23 - - I - - User defined Interrupts, external of INT n. */
168	IDTE_INT_GEN(), /* 24 - - I - - User defined Interrupts, external of INT n. */
169	IDTE_INT_GEN(), /* 25 - - I - - User defined Interrupts, external of INT n. */
170	IDTE_INT_GEN(), /* 26 - - I - - User defined Interrupts, external of INT n. */
171	IDTE_INT_GEN(), /* 27 - - I - - User defined Interrupts, external of INT n. */
172	IDTE_INT_GEN(), /* 28 - - I - - User defined Interrupts, external of INT n. */
173	IDTE_INT_GEN(), /* 29 - - I - - User defined Interrupts, external of INT n. */
174	IDTE_INT_GEN(), /* 2a - - I - - User defined Interrupts, external of INT n. */
175	IDTE_INT_GEN(), /* 2b - - I - - User defined Interrupts, external of INT n. */
176	IDTE_INT_GEN(), /* 2c - - I - - User defined Interrupts, external of INT n. */
177	IDTE_INT_GEN(), /* 2d - - I - - User defined Interrupts, external of INT n. */
178	IDTE_INT_GEN(), /* 2e - - I - - User defined Interrupts, external of INT n. */
179	IDTE_INT_GEN(), /* 2f - - I - - User defined Interrupts, external of INT n. */
180	IDTE_INT_GEN(), /* 30 - - I - - User defined Interrupts, external of INT n. */
181	IDTE_INT_GEN(), /* 31 - - I - - User defined Interrupts, external of INT n. */
182	IDTE_INT_GEN(), /* 32 - - I - - User defined Interrupts, external of INT n. */
183	IDTE_INT_GEN(), /* 33 - - I - - User defined Interrupts, external of INT n. */
184	IDTE_INT_GEN(), /* 34 - - I - - User defined Interrupts, external of INT n. */
185	IDTE_INT_GEN(), /* 35 - - I - - User defined Interrupts, external of INT n. */
186	IDTE_INT_GEN(), /* 36 - - I - - User defined Interrupts, external of INT n. */
187	IDTE_INT_GEN(), /* 37 - - I - - User defined Interrupts, external of INT n. */
188	IDTE_INT_GEN(), /* 38 - - I - - User defined Interrupts, external of INT n. */
189	IDTE_INT_GEN(), /* 39 - - I - - User defined Interrupts, external of INT n. */
190	IDTE_INT_GEN(), /* 3a - - I - - User defined Interrupts, external of INT n. */
191	IDTE_INT_GEN(), /* 3b - - I - - User defined Interrupts, external of INT n. */
192	IDTE_INT_GEN(), /* 3c - - I - - User defined Interrupts, external of INT n. */
193	IDTE_INT_GEN(), /* 3d - - I - - User defined Interrupts, external of INT n. */
194	IDTE_INT_GEN(), /* 3e - - I - - User defined Interrupts, external of INT n. */
195	IDTE_INT_GEN(), /* 3f - - I - - User defined Interrupts, external of INT n. */
196	IDTE_INT_GEN(), /* 40 - - I - - User defined Interrupts, external of INT n. */
197	IDTE_INT_GEN(), /* 41 - - I - - User defined Interrupts, external of INT n. */
198	IDTE_INT_GEN(), /* 42 - - I - - User defined Interrupts, external of INT n. */
199	IDTE_INT_GEN(), /* 43 - - I - - User defined Interrupts, external of INT n. */
200	IDTE_INT_GEN(), /* 44 - - I - - User defined Interrupts, external of INT n. */
201	IDTE_INT_GEN(), /* 45 - - I - - User defined Interrupts, external of INT n. */
202	IDTE_INT_GEN(), /* 46 - - I - - User defined Interrupts, external of INT n. */
203	IDTE_INT_GEN(), /* 47 - - I - - User defined Interrupts, external of INT n. */
204	IDTE_INT_GEN(), /* 48 - - I - - User defined Interrupts, external of INT n. */
205	IDTE_INT_GEN(), /* 49 - - I - - User defined Interrupts, external of INT n. */
206	IDTE_INT_GEN(), /* 4a - - I - - User defined Interrupts, external of INT n. */
207	IDTE_INT_GEN(), /* 4b - - I - - User defined Interrupts, external of INT n. */
208	IDTE_INT_GEN(), /* 4c - - I - - User defined Interrupts, external of INT n. */
209	IDTE_INT_GEN(), /* 4d - - I - - User defined Interrupts, external of INT n. */
210	IDTE_INT_GEN(), /* 4e - - I - - User defined Interrupts, external of INT n. */
211	IDTE_INT_GEN(), /* 4f - - I - - User defined Interrupts, external of INT n. */
212	IDTE_INT_GEN(), /* 50 - - I - - User defined Interrupts, external of INT n. */
213	IDTE_INT_GEN(), /* 51 - - I - - User defined Interrupts, external of INT n. */
214	IDTE_INT_GEN(), /* 52 - - I - - User defined Interrupts, external of INT n. */
215	IDTE_INT_GEN(), /* 53 - - I - - User defined Interrupts, external of INT n. */
216	IDTE_INT_GEN(), /* 54 - - I - - User defined Interrupts, external of INT n. */
217	IDTE_INT_GEN(), /* 55 - - I - - User defined Interrupts, external of INT n. */
218	IDTE_INT_GEN(), /* 56 - - I - - User defined Interrupts, external of INT n. */
219	IDTE_INT_GEN(), /* 57 - - I - - User defined Interrupts, external of INT n. */
220	IDTE_INT_GEN(), /* 58 - - I - - User defined Interrupts, external of INT n. */
221	IDTE_INT_GEN(), /* 59 - - I - - User defined Interrupts, external of INT n. */
222	IDTE_INT_GEN(), /* 5a - - I - - User defined Interrupts, external of INT n. */
223	IDTE_INT_GEN(), /* 5b - - I - - User defined Interrupts, external of INT n. */
224	IDTE_INT_GEN(), /* 5c - - I - - User defined Interrupts, external of INT n. */
225	IDTE_INT_GEN(), /* 5d - - I - - User defined Interrupts, external of INT n. */
226	IDTE_INT_GEN(), /* 5e - - I - - User defined Interrupts, external of INT n. */
227	IDTE_INT_GEN(), /* 5f - - I - - User defined Interrupts, external of INT n. */
228	IDTE_INT_GEN(), /* 60 - - I - - User defined Interrupts, external of INT n. */
229	IDTE_INT_GEN(), /* 61 - - I - - User defined Interrupts, external of INT n. */
230	IDTE_INT_GEN(), /* 62 - - I - - User defined Interrupts, external of INT n. */
231	IDTE_INT_GEN(), /* 63 - - I - - User defined Interrupts, external of INT n. */
232	IDTE_INT_GEN(), /* 64 - - I - - User defined Interrupts, external of INT n. */
233	IDTE_INT_GEN(), /* 65 - - I - - User defined Interrupts, external of INT n. */
234	IDTE_INT_GEN(), /* 66 - - I - - User defined Interrupts, external of INT n. */
235	IDTE_INT_GEN(), /* 67 - - I - - User defined Interrupts, external of INT n. */
236	IDTE_INT_GEN(), /* 68 - - I - - User defined Interrupts, external of INT n. */
237	IDTE_INT_GEN(), /* 69 - - I - - User defined Interrupts, external of INT n. */
238	IDTE_INT_GEN(), /* 6a - - I - - User defined Interrupts, external of INT n. */
239	IDTE_INT_GEN(), /* 6b - - I - - User defined Interrupts, external of INT n. */
240	IDTE_INT_GEN(), /* 6c - - I - - User defined Interrupts, external of INT n. */
241	IDTE_INT_GEN(), /* 6d - - I - - User defined Interrupts, external of INT n. */
242	IDTE_INT_GEN(), /* 6e - - I - - User defined Interrupts, external of INT n. */
243	IDTE_INT_GEN(), /* 6f - - I - - User defined Interrupts, external of INT n. */
244	IDTE_INT_GEN(), /* 70 - - I - - User defined Interrupts, external of INT n. */
245	IDTE_INT_GEN(), /* 71 - - I - - User defined Interrupts, external of INT n. */
246	IDTE_INT_GEN(), /* 72 - - I - - User defined Interrupts, external of INT n. */
247	IDTE_INT_GEN(), /* 73 - - I - - User defined Interrupts, external of INT n. */
248	IDTE_INT_GEN(), /* 74 - - I - - User defined Interrupts, external of INT n. */
249	IDTE_INT_GEN(), /* 75 - - I - - User defined Interrupts, external of INT n. */
250	IDTE_INT_GEN(), /* 76 - - I - - User defined Interrupts, external of INT n. */
251	IDTE_INT_GEN(), /* 77 - - I - - User defined Interrupts, external of INT n. */
252	IDTE_INT_GEN(), /* 78 - - I - - User defined Interrupts, external of INT n. */
253	IDTE_INT_GEN(), /* 79 - - I - - User defined Interrupts, external of INT n. */
254	IDTE_INT_GEN(), /* 7a - - I - - User defined Interrupts, external of INT n. */
255	IDTE_INT_GEN(), /* 7b - - I - - User defined Interrupts, external of INT n. */
256	IDTE_INT_GEN(), /* 7c - - I - - User defined Interrupts, external of INT n. */
257	IDTE_INT_GEN(), /* 7d - - I - - User defined Interrupts, external of INT n. */
258	IDTE_INT_GEN(), /* 7e - - I - - User defined Interrupts, external of INT n. */
259	IDTE_INT_GEN(), /* 7f - - I - - User defined Interrupts, external of INT n. */
260	IDTE_INT_GEN(), /* 80 - - I - - User defined Interrupts, external of INT n. */
261	IDTE_INT_GEN(), /* 81 - - I - - User defined Interrupts, external of INT n. */
262	IDTE_INT_GEN(), /* 82 - - I - - User defined Interrupts, external of INT n. */
263	IDTE_INT_GEN(), /* 83 - - I - - User defined Interrupts, external of INT n. */
264	IDTE_INT_GEN(), /* 84 - - I - - User defined Interrupts, external of INT n. */
265	IDTE_INT_GEN(), /* 85 - - I - - User defined Interrupts, external of INT n. */
266	IDTE_INT_GEN(), /* 86 - - I - - User defined Interrupts, external of INT n. */
267	IDTE_INT_GEN(), /* 87 - - I - - User defined Interrupts, external of INT n. */
268	IDTE_INT_GEN(), /* 88 - - I - - User defined Interrupts, external of INT n. */
269	IDTE_INT_GEN(), /* 89 - - I - - User defined Interrupts, external of INT n. */
270	IDTE_INT_GEN(), /* 8a - - I - - User defined Interrupts, external of INT n. */
271	IDTE_INT_GEN(), /* 8b - - I - - User defined Interrupts, external of INT n. */
272	IDTE_INT_GEN(), /* 8c - - I - - User defined Interrupts, external of INT n. */
273	IDTE_INT_GEN(), /* 8d - - I - - User defined Interrupts, external of INT n. */
274	IDTE_INT_GEN(), /* 8e - - I - - User defined Interrupts, external of INT n. */
275	IDTE_INT_GEN(), /* 8f - - I - - User defined Interrupts, external of INT n. */
276	IDTE_INT_GEN(), /* 90 - - I - - User defined Interrupts, external of INT n. */
277	IDTE_INT_GEN(), /* 91 - - I - - User defined Interrupts, external of INT n. */
278	IDTE_INT_GEN(), /* 92 - - I - - User defined Interrupts, external of INT n. */
279	IDTE_INT_GEN(), /* 93 - - I - - User defined Interrupts, external of INT n. */
280	IDTE_INT_GEN(), /* 94 - - I - - User defined Interrupts, external of INT n. */
281	IDTE_INT_GEN(), /* 95 - - I - - User defined Interrupts, external of INT n. */
282	IDTE_INT_GEN(), /* 96 - - I - - User defined Interrupts, external of INT n. */
283	IDTE_INT_GEN(), /* 97 - - I - - User defined Interrupts, external of INT n. */
284	IDTE_INT_GEN(), /* 98 - - I - - User defined Interrupts, external of INT n. */
285	IDTE_INT_GEN(), /* 99 - - I - - User defined Interrupts, external of INT n. */
286	IDTE_INT_GEN(), /* 9a - - I - - User defined Interrupts, external of INT n. */
287	IDTE_INT_GEN(), /* 9b - - I - - User defined Interrupts, external of INT n. */
288	IDTE_INT_GEN(), /* 9c - - I - - User defined Interrupts, external of INT n. */
289	IDTE_INT_GEN(), /* 9d - - I - - User defined Interrupts, external of INT n. */
290	IDTE_INT_GEN(), /* 9e - - I - - User defined Interrupts, external of INT n. */
291	IDTE_INT_GEN(), /* 9f - - I - - User defined Interrupts, external of INT n. */
292	IDTE_INT_GEN(), /* a0 - - I - - User defined Interrupts, external of INT n. */
293	IDTE_INT_GEN(), /* a1 - - I - - User defined Interrupts, external of INT n. */
294	IDTE_INT_GEN(), /* a2 - - I - - User defined Interrupts, external of INT n. */
295	IDTE_INT_GEN(), /* a3 - - I - - User defined Interrupts, external of INT n. */
296	IDTE_INT_GEN(), /* a4 - - I - - User defined Interrupts, external of INT n. */
297	IDTE_INT_GEN(), /* a5 - - I - - User defined Interrupts, external of INT n. */
298	IDTE_INT_GEN(), /* a6 - - I - - User defined Interrupts, external of INT n. */
299	IDTE_INT_GEN(), /* a7 - - I - - User defined Interrupts, external of INT n. */
300	IDTE_INT_GEN(), /* a8 - - I - - User defined Interrupts, external of INT n. */
301	IDTE_INT_GEN(), /* a9 - - I - - User defined Interrupts, external of INT n. */
302	IDTE_INT_GEN(), /* aa - - I - - User defined Interrupts, external of INT n. */
303	IDTE_INT_GEN(), /* ab - - I - - User defined Interrupts, external of INT n. */
304	IDTE_INT_GEN(), /* ac - - I - - User defined Interrupts, external of INT n. */
305	IDTE_INT_GEN(), /* ad - - I - - User defined Interrupts, external of INT n. */
306	IDTE_INT_GEN(), /* ae - - I - - User defined Interrupts, external of INT n. */
307	IDTE_INT_GEN(), /* af - - I - - User defined Interrupts, external of INT n. */
308	IDTE_INT_GEN(), /* b0 - - I - - User defined Interrupts, external of INT n. */
309	IDTE_INT_GEN(), /* b1 - - I - - User defined Interrupts, external of INT n. */
310	IDTE_INT_GEN(), /* b2 - - I - - User defined Interrupts, external of INT n. */
311	IDTE_INT_GEN(), /* b3 - - I - - User defined Interrupts, external of INT n. */
312	IDTE_INT_GEN(), /* b4 - - I - - User defined Interrupts, external of INT n. */
313	IDTE_INT_GEN(), /* b5 - - I - - User defined Interrupts, external of INT n. */
314	IDTE_INT_GEN(), /* b6 - - I - - User defined Interrupts, external of INT n. */
315	IDTE_INT_GEN(), /* b7 - - I - - User defined Interrupts, external of INT n. */
316	IDTE_INT_GEN(), /* b8 - - I - - User defined Interrupts, external of INT n. */
317	IDTE_INT_GEN(), /* b9 - - I - - User defined Interrupts, external of INT n. */
318	IDTE_INT_GEN(), /* ba - - I - - User defined Interrupts, external of INT n. */
319	IDTE_INT_GEN(), /* bb - - I - - User defined Interrupts, external of INT n. */
320	IDTE_INT_GEN(), /* bc - - I - - User defined Interrupts, external of INT n. */
321	IDTE_INT_GEN(), /* bd - - I - - User defined Interrupts, external of INT n. */
322	IDTE_INT_GEN(), /* be - - I - - User defined Interrupts, external of INT n. */
323	IDTE_INT_GEN(), /* bf - - I - - User defined Interrupts, external of INT n. */
324	IDTE_INT_GEN(), /* c0 - - I - - User defined Interrupts, external of INT n. */
325	IDTE_INT_GEN(), /* c1 - - I - - User defined Interrupts, external of INT n. */
326	IDTE_INT_GEN(), /* c2 - - I - - User defined Interrupts, external of INT n. */
327	IDTE_INT_GEN(), /* c3 - - I - - User defined Interrupts, external of INT n. */
328	IDTE_INT_GEN(), /* c4 - - I - - User defined Interrupts, external of INT n. */
329	IDTE_INT_GEN(), /* c5 - - I - - User defined Interrupts, external of INT n. */
330	IDTE_INT_GEN(), /* c6 - - I - - User defined Interrupts, external of INT n. */
331	IDTE_INT_GEN(), /* c7 - - I - - User defined Interrupts, external of INT n. */
332	IDTE_INT_GEN(), /* c8 - - I - - User defined Interrupts, external of INT n. */
333	IDTE_INT_GEN(), /* c9 - - I - - User defined Interrupts, external of INT n. */
334	IDTE_INT_GEN(), /* ca - - I - - User defined Interrupts, external of INT n. */
335	IDTE_INT_GEN(), /* cb - - I - - User defined Interrupts, external of INT n. */
336	IDTE_INT_GEN(), /* cc - - I - - User defined Interrupts, external of INT n. */
337	IDTE_INT_GEN(), /* cd - - I - - User defined Interrupts, external of INT n. */
338	IDTE_INT_GEN(), /* ce - - I - - User defined Interrupts, external of INT n. */
339	IDTE_INT_GEN(), /* cf - - I - - User defined Interrupts, external of INT n. */
340	IDTE_INT_GEN(), /* d0 - - I - - User defined Interrupts, external of INT n. */
341	IDTE_INT_GEN(), /* d1 - - I - - User defined Interrupts, external of INT n. */
342	IDTE_INT_GEN(), /* d2 - - I - - User defined Interrupts, external of INT n. */
343	IDTE_INT_GEN(), /* d3 - - I - - User defined Interrupts, external of INT n. */
344	IDTE_INT_GEN(), /* d4 - - I - - User defined Interrupts, external of INT n. */
345	IDTE_INT_GEN(), /* d5 - - I - - User defined Interrupts, external of INT n. */
346	IDTE_INT_GEN(), /* d6 - - I - - User defined Interrupts, external of INT n. */
347	IDTE_INT_GEN(), /* d7 - - I - - User defined Interrupts, external of INT n. */
348	IDTE_INT_GEN(), /* d8 - - I - - User defined Interrupts, external of INT n. */
349	IDTE_INT_GEN(), /* d9 - - I - - User defined Interrupts, external of INT n. */
350	IDTE_INT_GEN(), /* da - - I - - User defined Interrupts, external of INT n. */
351	IDTE_INT_GEN(), /* db - - I - - User defined Interrupts, external of INT n. */
352	IDTE_INT_GEN(), /* dc - - I - - User defined Interrupts, external of INT n. */
353	IDTE_INT_GEN(), /* dd - - I - - User defined Interrupts, external of INT n. */
354	IDTE_INT_GEN(), /* de - - I - - User defined Interrupts, external of INT n. */
355	IDTE_INT_GEN(), /* df - - I - - User defined Interrupts, external of INT n. */
356	IDTE_INT_GEN(), /* e0 - - I - - User defined Interrupts, external of INT n. */
357	IDTE_INT_GEN(), /* e1 - - I - - User defined Interrupts, external of INT n. */
358	IDTE_INT_GEN(), /* e2 - - I - - User defined Interrupts, external of INT n. */
359	IDTE_INT_GEN(), /* e3 - - I - - User defined Interrupts, external of INT n. */
360	IDTE_INT_GEN(), /* e4 - - I - - User defined Interrupts, external of INT n. */
361	IDTE_INT_GEN(), /* e5 - - I - - User defined Interrupts, external of INT n. */
362	IDTE_INT_GEN(), /* e6 - - I - - User defined Interrupts, external of INT n. */
363	IDTE_INT_GEN(), /* e7 - - I - - User defined Interrupts, external of INT n. */
364	IDTE_INT_GEN(), /* e8 - - I - - User defined Interrupts, external of INT n. */
365	IDTE_INT_GEN(), /* e9 - - I - - User defined Interrupts, external of INT n. */
366	IDTE_INT_GEN(), /* ea - - I - - User defined Interrupts, external of INT n. */
367	IDTE_INT_GEN(), /* eb - - I - - User defined Interrupts, external of INT n. */
368	IDTE_INT_GEN(), /* ec - - I - - User defined Interrupts, external of INT n. */
369	IDTE_INT_GEN(), /* ed - - I - - User defined Interrupts, external of INT n. */
370	IDTE_INT_GEN(), /* ee - - I - - User defined Interrupts, external of INT n. */
371	IDTE_INT_GEN(), /* ef - - I - - User defined Interrupts, external of INT n. */
372	IDTE_INT_GEN(), /* f0 - - I - - User defined Interrupts, external of INT n. */
373	IDTE_INT_GEN(), /* f1 - - I - - User defined Interrupts, external of INT n. */
374	IDTE_INT_GEN(), /* f2 - - I - - User defined Interrupts, external of INT n. */
375	IDTE_INT_GEN(), /* f3 - - I - - User defined Interrupts, external of INT n. */
376	IDTE_INT_GEN(), /* f4 - - I - - User defined Interrupts, external of INT n. */
377	IDTE_INT_GEN(), /* f5 - - I - - User defined Interrupts, external of INT n. */
378	IDTE_INT_GEN(), /* f6 - - I - - User defined Interrupts, external of INT n. */
379	IDTE_INT_GEN(), /* f7 - - I - - User defined Interrupts, external of INT n. */
380	IDTE_INT_GEN(), /* f8 - - I - - User defined Interrupts, external of INT n. */
381	IDTE_INT_GEN(), /* f9 - - I - - User defined Interrupts, external of INT n. */
382	IDTE_INT_GEN(), /* fa - - I - - User defined Interrupts, external of INT n. */
383	IDTE_INT_GEN(), /* fb - - I - - User defined Interrupts, external of INT n. */
384	IDTE_INT_GEN(), /* fc - - I - - User defined Interrupts, external of INT n. */
385	IDTE_INT_GEN(), /* fd - - I - - User defined Interrupts, external of INT n. */
386	IDTE_INT_GEN(), /* fe - - I - - User defined Interrupts, external of INT n. */
387	IDTE_INT_GEN(), /* ff - - I - - User defined Interrupts, external of INT n. */
388	#undef IDTE_TRAP
389	#undef IDTE_TRAP_GEN
390	#undef IDTE_INT
391	#undef IDTE_INT_GEN
392	#undef IDTE_TASK
393	#undef IDTE_UNUSED
394	#undef IDTE_RESERVED
395	};
396
397
398	/**
399	* Enable or disable tracking of Guest's IDT.
400	* @{
401	*/
402	#define TRPM_TRACK_GUEST_IDT_CHANGES
403	/** @} */
404
405	/**
406	* Enable or disable tracking of Shadow IDT.
407	* @{
408	*/
409	#define TRPM_TRACK_SHADOW_IDT_CHANGES
410	/** @} */
411
412	/** TRPM saved state version. */
413	#define TRPM_SAVED_STATE_VERSION 8
414
415
416	/*******************************************************************************
417	* Internal Functions *
418	*******************************************************************************/
419	static DECLCALLBACK(int) trpmR3Save(PVM pVM, PSSMHANDLE pSSM);
420	static DECLCALLBACK(int) trpmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version);
421	static DECLCALLBACK(int) trpmGuestIDTWriteHandler(PVM pVM, RTGCPTR GCPtr, void pvPtr, void pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser);
422
423
424	/**
425	* Initializes the Trap Manager
426	*
427	* @returns VBox status code.
428	* @param pVM The VM to operate on.
429	*/
430	TRPMR3DECL(int) TRPMR3Init(PVM pVM)
431	{
432	LogFlow(("TRPMR3Init\n"));
433	/*
434	* Assert sizes and alignments.
435	*/
436	AssertRelease(!(RT_OFFSETOF(VM, trpm.s) & 31));
437	AssertRelease(!(RT_OFFSETOF(VM, trpm.s.aIdt) & 15));
438	AssertRelease(sizeof(pVM->trpm.s) <= sizeof(pVM->trpm.padding));
439	AssertRelease(ELEMENTS(pVM->trpm.s.aGuestTrapHandler) == sizeof(pVM->trpm.s.au32IdtPatched)*8);
440
441	/*
442	* Initialize members.
443	*/
444	pVM->trpm.s.offVM = RT_OFFSETOF(VM, trpm);
445	pVM->trpm.s.uActiveVector = ~0;
446	pVM->trpm.s.GuestIdtr.pIdt = ~0;
447	pVM->trpm.s.GCPtrIdt = ~0;
448	pVM->trpm.s.fDisableMonitoring = false;
449
450	/*
451	* Initialize the IDT.
452	* The handler addresses will be set in the TRPMR3Relocate() function.
453	*/
454	Assert(sizeof(pVM->trpm.s.aIdt) == sizeof(g_aIdt));
455	memcpy(&pVM->trpm.s.aIdt[0], &g_aIdt[0], sizeof(pVM->trpm.s.aIdt));
456
457	/*
458	* Register the saved state data unit.
459	*/
460	int rc = SSMR3RegisterInternal(pVM, "trpm", 1, TRPM_SAVED_STATE_VERSION, sizeof(TRPM),
461	NULL, trpmR3Save, NULL,
462	NULL, trpmR3Load, NULL);
463	if (VBOX_FAILURE(rc))
464	return rc;
465
466	/*
467	* Statistics.
468	*/
469	STAM_REG(pVM, &pVM->trpm.s.StatGCWriteGuestIDTFault, STAMTYPE_COUNTER, "/TRPM/GC/Write/IDT/Fault", STAMUNIT_OCCURENCES, "The number of writes to the Guest IDT.");
470	STAM_REG(pVM, &pVM->trpm.s.StatGCWriteGuestIDTHandled, STAMTYPE_COUNTER, "/TRPM/GC/Write/IDT/Handled", STAMUNIT_OCCURENCES, "The number of writes to the Guest IDT.");
471
472	STAM_REG(pVM, &pVM->trpm.s.StatSyncIDT, STAMTYPE_PROFILE, "/PROF/TRPM/SyncIDT", STAMUNIT_TICKS_PER_CALL, "Profiling of TRPMR3SyncIDT().");
473
474	/* traps */
475	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x00], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/00", STAMUNIT_TICKS_PER_CALL, "#DE - Divide error.");
476	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).");
477	//STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x02], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/02", STAMUNIT_TICKS_PER_CALL, "NMI");
478	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x03], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/03", STAMUNIT_TICKS_PER_CALL, "#BP - Breakpoint.");
479	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x04], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/04", STAMUNIT_TICKS_PER_CALL, "#OF - Overflow.");
480	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x05], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/05", STAMUNIT_TICKS_PER_CALL, "#BR - Bound range exceeded.");
481	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x06], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/06", STAMUNIT_TICKS_PER_CALL, "#UD - Undefined opcode.");
482	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x07], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/07", STAMUNIT_TICKS_PER_CALL, "#NM - Device not available (FPU).");
483	//STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x08], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/08", STAMUNIT_TICKS_PER_CALL, "#DF - Double fault.");
484	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x09], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/09", STAMUNIT_TICKS_PER_CALL, "#?? - Coprocessor segment overrun (obsolete).");
485	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0a], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0a", STAMUNIT_TICKS_PER_CALL, "#TS - Task switch fault.");
486	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0b], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0b", STAMUNIT_TICKS_PER_CALL, "#NP - Segemnt not present.");
487	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0c], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0c", STAMUNIT_TICKS_PER_CALL, "#SS - Stack segment fault.");
488	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0d], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0d", STAMUNIT_TICKS_PER_CALL, "#GP - General protection fault.");
489	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0e], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0e", STAMUNIT_TICKS_PER_CALL, "#PF - Page fault.");
490	//STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0f], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0f", STAMUNIT_TICKS_PER_CALL, "Reserved.");
491	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x10], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/10", STAMUNIT_TICKS_PER_CALL, "#MF - Math fault..");
492	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x11], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/11", STAMUNIT_TICKS_PER_CALL, "#AC - Alignment check.");
493	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x12], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/12", STAMUNIT_TICKS_PER_CALL, "#MC - Machine check.");
494	STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x13], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/13", STAMUNIT_TICKS_PER_CALL, "#XF - SIMD Floating-Point Exception.");
495
496	#ifdef VBOX_WITH_STATISTICS
497	rc = MMHyperAlloc(pVM, sizeof(STAMCOUNTER) * 255, 8, MM_TAG_STAM, (void **)&pVM->trpm.s.paStatForwardedIRQR3);
498	AssertRCReturn(rc, rc);
499	pVM->trpm.s.paStatForwardedIRQGC = MMHyperR3ToGC(pVM, pVM->trpm.s.paStatForwardedIRQR3);
500	pVM->trpm.s.paStatForwardedIRQR0 = MMHyperR3ToR0(pVM, pVM->trpm.s.paStatForwardedIRQR3);
501	for (unsigned i = 0; i < 255; i++)
502	STAMR3RegisterF(pVM, &pVM->trpm.s.paStatForwardedIRQR3[i], STAMTYPE_COUNTER, STAMVISIBILITY_USED, STAMUNIT_OCCURENCES, "Forwarded interrupts.",
503	i < 0x20 ? "/TRPM/ForwardRaw/TRAP/%02X" : "/TRPM/ForwardRaw/IRQ/%02X", i);
504	#endif
505	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailNoHandler, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/Fail/NoHandler", STAMUNIT_OCCURENCES, "Failure to forward interrupt in raw mode.");
506	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailPatchAddr, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/Fail/PatchAddr", STAMUNIT_OCCURENCES, "Failure to forward interrupt in raw mode.");
507
508	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailGC, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/Fail/GC", STAMUNIT_OCCURENCES, "Failure to forward interrupt in raw mode.");
509	STAM_REG(pVM, &pVM->trpm.s.StatForwardFailHC, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/Fail/HC", STAMUNIT_OCCURENCES, "Failure to forward interrupt in raw mode.");
510	STAM_REG(pVM, &pVM->trpm.s.StatForwardProfGC, STAMTYPE_PROFILE_ADV, "/TRPM/ForwardRaw/Prof/GC", STAMUNIT_TICKS_PER_CALL, "Profiling TRPMForwardTrap.");
511	STAM_REG(pVM, &pVM->trpm.s.StatForwardProfHC, STAMTYPE_PROFILE_ADV, "/TRPM/ForwardRaw/Prof/HC", STAMUNIT_TICKS_PER_CALL, "Profiling TRPMForwardTrap.");
512
513	STAM_REG(pVM, &pVM->trpm.s.StatTrap0dDisasm, STAMTYPE_PROFILE_ADV, "/TRPM/Trap0d/Prof/Disasm", STAMUNIT_TICKS_PER_CALL, "Profiling trpmGCTrap0dHandler.");
514
515	/*
516	* Default action when entering raw mode for the first time
517	*/
518	VM_FF_SET(pVM, VM_FF_TRPM_SYNC_IDT);
519	return 0;
520	}
521
522
523	/**
524	* Applies relocations to data and code managed by this component.
525	*
526	* This function will be called at init and whenever the VMM need
527	* to relocate itself inside the GC.
528	*
529	* @param pVM The VM handle.
530	* @param offDelta Relocation delta relative to old location.
531	*/
532	TRPMR3DECL(void) TRPMR3Relocate(PVM pVM, RTGCINTPTR offDelta)
533	{
534	LogFlow(("TRPMR3Relocate\n"));
535	/*
536	* Get the trap handler addresses.
537	*
538	* If VMMGC.gc is screwed, so are we. We'll assert here since it elsewise
539	* would make init order impossible if we should assert the presence of these
540	* exports in TRPMR3Init().
541	*/
542	RTGCPTR aGCPtrs[TRPM_HANDLER_MAX] = {0};
543	int rc;
544	rc = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerInterupt", &aGCPtrs[TRPM_HANDLER_INT]);
545	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerInterupt in VMMGC.gc!\n"));
546
547	rc = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerGeneric", &aGCPtrs[TRPM_HANDLER_TRAP]);
548	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerGeneric in VMMGC.gc!\n"));
549
550	rc = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerTrap08", &aGCPtrs[TRPM_HANDLER_TRAP_08]);
551	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerTrap08 in VMMGC.gc!\n"));
552
553	rc = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerTrap12", &aGCPtrs[TRPM_HANDLER_TRAP_12]);
554	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerTrap12 in VMMGC.gc!\n"));
555
556	RTSEL SelCS = CPUMGetHyperCS(pVM);
557
558	/*
559	* Iterate the idt and set the addresses.
560	*/
561	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[0];
562	PVBOXIDTE_GENERIC pIdteTemplate = &g_aIdt[0];
563	for (unsigned i = 0; i < ELEMENTS(pVM->trpm.s.aIdt); i++, pIdte++, pIdteTemplate++)
564	{
565	if ( pIdte->Gen.u1Present
566	&& !ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], i)
567	)
568	{
569	Assert(pIdteTemplate->u16OffsetLow < TRPM_HANDLER_MAX);
570	RTGCPTR Offset = aGCPtrs[pIdteTemplate->u16OffsetLow];
571	switch (pIdteTemplate->u16OffsetLow)
572	{
573	/*
574	* Generic handlers have different entrypoints for each possible
575	* vector number. These entrypoints makes a sort of an array with
576	* 8 byte entries where the vector number is the index.
577	* See TRPMGCHandlersA.asm for details.
578	*/
579	case TRPM_HANDLER_INT:
580	case TRPM_HANDLER_TRAP:
581	Offset += i * 8;
582	break;
583	case TRPM_HANDLER_TRAP_12:
584	break;
585	case TRPM_HANDLER_TRAP_08:
586	/* Handle #DF Task Gate in special way. */
587	pIdte->Gen.u16SegSel = SELMGetTrap8Selector(pVM);
588	pIdte->Gen.u16OffsetLow = 0;
589	pIdte->Gen.u16OffsetHigh = 0;
590	SELMSetTrap8EIP(pVM, Offset);
591	continue;
592	}
593	/* (non-task gates only ) */
594	pIdte->Gen.u16OffsetLow = Offset & 0xffff;
595	pIdte->Gen.u16OffsetHigh = Offset >> 16;
596	pIdte->Gen.u16SegSel = SelCS;
597	}
598	}
599
600	/*
601	* Update IDTR (limit is including!).
602	*/
603	CPUMSetHyperIDTR(pVM, VM_GUEST_ADDR(pVM, &pVM->trpm.s.aIdt[0]), sizeof(pVM->trpm.s.aIdt)-1);
604
605	if (!pVM->trpm.s.fDisableMonitoring)
606	{
607	#ifdef TRPM_TRACK_SHADOW_IDT_CHANGES
608	if (pVM->trpm.s.GCPtrIdt != ~0U)
609	{
610	rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GCPtrIdt);
611	AssertRC(rc);
612	}
613	pVM->trpm.s.GCPtrIdt = VM_GUEST_ADDR(pVM, &pVM->trpm.s.aIdt[0]);
614	rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_HYPERVISOR, pVM->trpm.s.GCPtrIdt, pVM->trpm.s.GCPtrIdt + sizeof(pVM->trpm.s.aIdt) - 1,
615	0, 0, "trpmgcShadowIDTWriteHandler", 0, "Shadow IDT write access handler");
616	AssertRC(rc);
617	#endif
618	}
619
620	/* Relocate IDT handlers for forwarding guest traps/interrupts. */
621	for (uint32_t iTrap = 0; iTrap < ELEMENTS(pVM->trpm.s.aGuestTrapHandler); iTrap++)
622	{
623	if (pVM->trpm.s.aGuestTrapHandler[iTrap] != TRPM_INVALID_HANDLER)
624	{
625	Log(("TRPMR3Relocate: iGate=%2X Handler %VGv -> %VGv\n", iTrap, pVM->trpm.s.aGuestTrapHandler[iTrap], pVM->trpm.s.aGuestTrapHandler[iTrap] + offDelta));
626	pVM->trpm.s.aGuestTrapHandler[iTrap] += offDelta;
627	}
628
629	if (ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], iTrap))
630	{
631	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
632	RTGCPTR pHandler = (pIdte->Gen.u16OffsetHigh << 16) \| pIdte->Gen.u16OffsetLow;
633
634	Log(("TRPMR3Relocate: *iGate=%2X Handler %VGv -> %VGv\n", iTrap, pHandler, pHandler + offDelta));
635	pHandler += offDelta;
636
637	pIdte->Gen.u16OffsetHigh = pHandler >> 16;
638	pIdte->Gen.u16OffsetLow = pHandler & 0xFFFF;
639
640	}
641	}
642
643	pVM->trpm.s.paStatForwardedIRQGC += offDelta;
644	pVM->trpm.s.paStatForwardedIRQR0 = MMHyperR3ToR0(pVM, pVM->trpm.s.paStatForwardedIRQR3);
645	}
646
647
648	/**
649	* Terminates the Trap Manager
650	*
651	* @returns VBox status code.
652	* @param pVM The VM to operate on.
653	*/
654	TRPMR3DECL(int) TRPMR3Term(PVM pVM)
655	{
656	NOREF(pVM);
657	return 0;
658	}
659
660
661	/**
662	* The VM is being reset.
663	*
664	* For the TRPM component this means that any IDT write monitors
665	* needs to be removed, any pending trap cleared, and the IDT reset.
666	*
667	* @param pVM VM handle.
668	*/
669	TRPMR3DECL(void) TRPMR3Reset(PVM pVM)
670	{
671	/*
672	* Deregister any virtual handlers.
673	*/
674	#ifdef TRPM_TRACK_GUEST_IDT_CHANGES
675	if (pVM->trpm.s.GuestIdtr.pIdt != ~0U)
676	{
677	int rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GuestIdtr.pIdt);
678	AssertRC(rc);
679	pVM->trpm.s.GuestIdtr.pIdt = ~0U;
680	}
681	pVM->trpm.s.GuestIdtr.cbIdt = 0;
682	#endif
683
684	/*
685	* Reinitialize other members calling the relocator to get things right.
686	*/
687	pVM->trpm.s.uActiveVector = ~0;
688	memcpy(&pVM->trpm.s.aIdt[0], &g_aIdt[0], sizeof(pVM->trpm.s.aIdt));
689	memset(pVM->trpm.s.aGuestTrapHandler, 0, sizeof(pVM->trpm.s.aGuestTrapHandler));
690	TRPMR3Relocate(pVM, 0);
691
692	/*
693	* Default action when entering raw mode for the first time
694	*/
695	VM_FF_SET(pVM, VM_FF_TRPM_SYNC_IDT);
696	}
697
698
699	/**
700	* Execute state save operation.
701	*
702	* @returns VBox status code.
703	* @param pVM VM Handle.
704	* @param pSSM SSM operation handle.
705	*/
706	static DECLCALLBACK(int) trpmR3Save(PVM pVM, PSSMHANDLE pSSM)
707	{
708	LogFlow(("trpmR3Save:\n"));
709
710	/*
711	* Active and saved traps.
712	*/
713	PTRPM pTrpm = &pVM->trpm.s;
714	SSMR3PutUInt(pSSM, pTrpm->uActiveVector);
715	SSMR3PutUInt(pSSM, pTrpm->enmActiveType);
716	SSMR3PutGCUInt(pSSM, pTrpm->uActiveErrorCode);
717	SSMR3PutGCUIntPtr(pSSM, pTrpm->uActiveCR2);
718	SSMR3PutGCUInt(pSSM, pTrpm->uSavedVector);
719	SSMR3PutUInt(pSSM, pTrpm->enmSavedType);
720	SSMR3PutGCUInt(pSSM, pTrpm->uSavedErrorCode);
721	SSMR3PutGCUIntPtr(pSSM, pTrpm->uSavedCR2);
722	SSMR3PutGCUInt(pSSM, pTrpm->uPrevVector);
723	SSMR3PutGCUInt(pSSM, pTrpm->fDisableMonitoring);
724	SSMR3PutUInt(pSSM, VM_FF_ISSET(pVM, VM_FF_TRPM_SYNC_IDT));
725	SSMR3PutMem(pSSM, &pTrpm->au32IdtPatched[0], sizeof(pTrpm->au32IdtPatched));
726	SSMR3PutU32(pSSM, ~0); /* separator. */
727
728	/*
729	* Save any trampoline gates.
730	*/
731	for (uint32_t iTrap = 0; iTrap < ELEMENTS(pTrpm->aGuestTrapHandler); iTrap++)
732	{
733	if (pTrpm->aGuestTrapHandler[iTrap])
734	{
735	SSMR3PutU32(pSSM, iTrap);
736	SSMR3PutGCPtr(pSSM, pTrpm->aGuestTrapHandler[iTrap]);
737	SSMR3PutMem(pSSM, &pTrpm->aIdt[iTrap], sizeof(pTrpm->aIdt[iTrap]));
738	}
739	}
740
741	return SSMR3PutU32(pSSM, ~0); /* terminator */
742	}
743
744
745	/**
746	* Execute state load operation.
747	*
748	* @returns VBox status code.
749	* @param pVM VM Handle.
750	* @param pSSM SSM operation handle.
751	* @param u32Version Data layout version.
752	*/
753	static DECLCALLBACK(int) trpmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version)
754	{
755	LogFlow(("trpmR3Load:\n"));
756
757	/*
758	* Validate version.
759	*/
760	if (u32Version != TRPM_SAVED_STATE_VERSION)
761	{
762	Log(("trpmR3Load: Invalid version u32Version=%d!\n", u32Version));
763	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
764	}
765
766	/*
767	* Call the reset function to kick out any handled gates and other potential trouble.
768	*/
769	TRPMR3Reset(pVM);
770
771	/*
772	* Active and saved traps.
773	*/
774	PTRPM pTrpm = &pVM->trpm.s;
775	SSMR3GetUInt(pSSM, &pTrpm->uActiveVector);
776	SSMR3GetUInt(pSSM, (uint32_t *)&pTrpm->enmActiveType);
777	SSMR3GetGCUInt(pSSM, &pTrpm->uActiveErrorCode);
778	SSMR3GetGCUIntPtr(pSSM, &pTrpm->uActiveCR2);
779	SSMR3GetGCUInt(pSSM, &pTrpm->uSavedVector);
780	SSMR3GetUInt(pSSM, (uint32_t *)&pTrpm->enmSavedType);
781	SSMR3GetGCUInt(pSSM, &pTrpm->uSavedErrorCode);
782	SSMR3GetGCUIntPtr(pSSM, &pTrpm->uSavedCR2);
783	SSMR3GetGCUInt(pSSM, &pTrpm->uPrevVector);
784	SSMR3GetGCUInt(pSSM, &pTrpm->fDisableMonitoring);
785
786	RTUINT fSyncIDT;
787	int rc = SSMR3GetUInt(pSSM, &fSyncIDT);
788	if (VBOX_FAILURE(rc))
789	return rc;
790	if (fSyncIDT & ~1)
791	{
792	AssertMsgFailed(("fSyncIDT=%#x\n", fSyncIDT));
793	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
794	}
795	if (fSyncIDT)
796	VM_FF_SET(pVM, VM_FF_TRPM_SYNC_IDT);
797	/* else: cleared by reset call above. */
798
799	SSMR3GetMem(pSSM, &pTrpm->au32IdtPatched[0], sizeof(pTrpm->au32IdtPatched));
800
801	/* check the separator */
802	uint32_t u32Sep;
803	rc = SSMR3GetU32(pSSM, &u32Sep);
804	if (VBOX_FAILURE(rc))
805	return rc;
806	if (u32Sep != (uint32_t)~0)
807	{
808	AssertMsgFailed(("u32Sep=%#x (first)\n", u32Sep));
809	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
810	}
811
812	/*
813	* Restore any trampoline gates.
814	*/
815	for (;;)
816	{
817	/* gate number / terminator */
818	uint32_t iTrap;
819	rc = SSMR3GetU32(pSSM, &iTrap);
820	if (VBOX_FAILURE(rc))
821	return rc;
822	if (iTrap == (uint32_t)~0)
823	break;
824	if ( iTrap >= ELEMENTS(pTrpm->aIdt)
825	\|\| pTrpm->aGuestTrapHandler[iTrap])
826	{
827	AssertMsgFailed(("iTrap=%#x\n", iTrap));
828	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
829	}
830
831	/* restore the IDT entry. */
832	RTGCPTR GCPtrHandler;
833	SSMR3GetGCPtr(pSSM, &GCPtrHandler);
834	VBOXIDTE Idte;
835	rc = SSMR3GetMem(pSSM, &Idte, sizeof(Idte));
836	if (VBOX_FAILURE(rc))
837	return rc;
838	Assert(GCPtrHandler);
839	pTrpm->aIdt[iTrap] = Idte;
840	}
841
842	return VINF_SUCCESS;
843	}
844
845
846	/**
847	* Check if gate handlers were updated
848	* (callback for the VM_FF_TRPM_SYNC_IDT forced action).
849	*
850	* @returns VBox status code.
851	* @param pVM The VM handle.
852	*/
853	TRPMR3DECL(int) TRPMR3SyncIDT(PVM pVM)
854	{
855	STAM_PROFILE_START(&pVM->trpm.s.StatSyncIDT, a);
856	const bool fRawRing0 = EMIsRawRing0Enabled(pVM);
857	int rc;
858
859	if (pVM->trpm.s.fDisableMonitoring)
860	{
861	VM_FF_CLEAR(pVM, VM_FF_TRPM_SYNC_IDT);
862	return VINF_SUCCESS; /* Nothing to do */
863	}
864
865	if (fRawRing0 && CSAMIsEnabled(pVM))
866	{
867	/* Clear all handlers */
868	Log(("TRPMR3SyncIDT: Clear all trap handlers.\n"));
869	/** @todo inefficient, but simple */
870	for (unsigned iGate = 0; iGate < 256; iGate++)
871	trpmClearGuestTrapHandler(pVM, iGate);
872
873	/* Scan them all (only the first time) */
874	CSAMR3CheckGates(pVM, 0, 256);
875	}
876
877	/*
878	* Get the IDTR.
879	*/
880	VBOXIDTR IDTR;
881	IDTR.pIdt = CPUMGetGuestIDTR(pVM, &IDTR.cbIdt);
882	if (!IDTR.cbIdt)
883	{
884	Log(("No IDT entries...\n"));
885	return DBGFSTOP(pVM);
886	}
887
888	#ifdef TRPM_TRACK_GUEST_IDT_CHANGES
889	/*
890	* Check if Guest's IDTR has changed.
891	*/
892	if ( IDTR.pIdt != pVM->trpm.s.GuestIdtr.pIdt
893	\|\| IDTR.cbIdt != pVM->trpm.s.GuestIdtr.cbIdt)
894	{
895	Log(("TRPMR3UpdateFromCPUM: Guest's IDT is changed to pIdt=%08X cbIdt=%08X\n", IDTR.pIdt, IDTR.cbIdt));
896
897	/*
898	* [Re]Register write virtual handler for guest's IDT.
899	*/
900	if (pVM->trpm.s.GuestIdtr.pIdt != ~0U)
901	{
902	rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GuestIdtr.pIdt);
903	AssertRCReturn(rc, rc);
904	}
905	/* limit is including */
906	rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_WRITE, IDTR.pIdt, IDTR.pIdt + IDTR.cbIdt /* already inclusive */,
907	0, trpmGuestIDTWriteHandler, "trpmgcGuestIDTWriteHandler", 0, "Guest IDT write access handler");
908
909	if (rc == VERR_PGM_HANDLER_VIRTUAL_CONFLICT)
910	{
911	/* Could be a conflict with CSAM */
912	CSAMR3RemovePage(pVM, IDTR.pIdt);
913	if (PAGE_ADDRESS(IDTR.pIdt) != PAGE_ADDRESS(IDTR.pIdt + IDTR.cbIdt))
914	CSAMR3RemovePage(pVM, IDTR.pIdt + IDTR.cbIdt);
915
916	rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_WRITE, IDTR.pIdt, IDTR.pIdt + IDTR.cbIdt /* already inclusive */,
917	0, trpmGuestIDTWriteHandler, "trpmgcGuestIDTWriteHandler", 0, "Guest IDT write access handler");
918	}
919
920	AssertRCReturn(rc, rc);
921
922	/* Update saved Guest IDTR. */
923	pVM->trpm.s.GuestIdtr = IDTR;
924	}
925	#endif
926
927	/*
928	* Sync the interrupt gate.
929	* Should probably check/sync the others too, but for now we'll handle that in #GP.
930	*/
931	X86DESC Idte3;
932	rc = PGMPhysReadGCPtr(pVM, &Idte3, IDTR.pIdt + sizeof(Idte3) * 3, sizeof(Idte3));
933	if (VBOX_FAILURE(rc))
934	{
935	AssertMsgRC(rc, ("Failed to read IDT[3]! rc=%Vrc\n", rc));
936	return DBGFSTOP(pVM);
937	}
938	AssertRCReturn(rc, rc);
939	if (fRawRing0)
940	pVM->trpm.s.aIdt[3].Gen.u2DPL = RT_MAX(Idte3.Gen.u2Dpl, 1);
941	else
942	pVM->trpm.s.aIdt[3].Gen.u2DPL = Idte3.Gen.u2Dpl;
943
944	/*
945	* Clear the FF and we're done.
946	*/
947	VM_FF_CLEAR(pVM, VM_FF_TRPM_SYNC_IDT);
948	STAM_PROFILE_STOP(&pVM->trpm.s.StatSyncIDT, a);
949	return VINF_SUCCESS;
950	}
951
952
953	/**
954	* Disable IDT monitoring and syncing
955	*
956	* @param pVM The VM to operate on.
957	*/
958	TRPMR3DECL(void) TRPMR3DisableMonitoring(PVM pVM)
959	{
960	/*
961	* Deregister any virtual handlers.
962	*/
963	#ifdef TRPM_TRACK_GUEST_IDT_CHANGES
964	if (pVM->trpm.s.GuestIdtr.pIdt != ~0U)
965	{
966	int rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GuestIdtr.pIdt);
967	AssertRC(rc);
968	pVM->trpm.s.GuestIdtr.pIdt = ~0U;
969	}
970	pVM->trpm.s.GuestIdtr.cbIdt = 0;
971	#endif
972
973	#ifdef TRPM_TRACK_SHADOW_IDT_CHANGES
974	if (pVM->trpm.s.GCPtrIdt != ~0U)
975	{
976	int rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GCPtrIdt);
977	AssertRC(rc);
978	pVM->trpm.s.GCPtrIdt = ~0U;
979	}
980	#endif
981
982	VM_FF_CLEAR(pVM, VM_FF_TRPM_SYNC_IDT);
983
984	pVM->trpm.s.fDisableMonitoring = true;
985	}
986
987
988	/**
989	* \#PF Handler callback for virtual access handler ranges.
990	*
991	* Important to realize that a physical page in a range can have aliases, and
992	* for ALL and WRITE handlers these will also trigger.
993	*
994	* @returns VINF_SUCCESS if the handler have carried out the operation.
995	* @returns VINF_PGM_HANDLER_DO_DEFAULT if the caller should carry out the access operation.
996	* @param pVM VM Handle.
997	* @param GCPtr The virtual address the guest is writing to. (not correct if it's an alias!)
998	* @param pvPtr The HC mapping of that address.
999	* @param pvBuf What the guest is reading/writing.
1000	* @param cbBuf How much it's reading/writing.
1001	* @param enmAccessType The access type.
1002	* @param pvUser User argument.
1003	*/
1004	static DECLCALLBACK(int) trpmGuestIDTWriteHandler(PVM pVM, RTGCPTR GCPtr, void pvPtr, void pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser)
1005	{
1006	Assert(enmAccessType == PGMACCESSTYPE_WRITE);
1007	Log(("trpmGuestIDTWriteHandler: write to %VGv size %d\n", GCPtr, cbBuf));
1008	VM_FF_SET(pVM, VM_FF_TRPM_SYNC_IDT);
1009	return VINF_PGM_HANDLER_DO_DEFAULT;
1010	}
1011
1012
1013	/**
1014	* Clear passthrough interrupt gate handler (reset to default handler)
1015	*
1016	* @returns VBox status code.
1017	* @param pVM The VM to operate on.
1018	* @param iTrap Trap/interrupt gate number.
1019	*/
1020	TRPMR3DECL(int) trpmR3ClearPassThroughHandler(PVM pVM, unsigned iTrap)
1021	{
1022	/** @todo cleanup trpmR3ClearPassThroughHandler()! */
1023	RTGCPTR aGCPtrs[TRPM_HANDLER_MAX];
1024	int rc;
1025
1026	memset(aGCPtrs, 0, sizeof(aGCPtrs));
1027
1028	rc = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerInterupt", &aGCPtrs[TRPM_HANDLER_INT]);
1029	AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerInterupt in VMMGC.gc!\n"));
1030
1031	if ( iTrap < TRPM_HANDLER_INT_BASE
1032	\|\| iTrap >= ELEMENTS(pVM->trpm.s.aIdt))
1033	{
1034	AssertMsg(iTrap < TRPM_HANDLER_INT_BASE, ("Illegal gate number %#x!\n", iTrap));
1035	return VERR_INVALID_PARAMETER;
1036	}
1037	memcpy(&pVM->trpm.s.aIdt[iTrap], &g_aIdt[iTrap], sizeof(pVM->trpm.s.aIdt[0]));
1038
1039	/* Unmark it for relocation purposes. */
1040	ASMBitClear(&pVM->trpm.s.au32IdtPatched[0], iTrap);
1041
1042	RTSEL SelCS = CPUMGetHyperCS(pVM);
1043	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
1044	PVBOXIDTE_GENERIC pIdteTemplate = &g_aIdt[iTrap];
1045	if (pIdte->Gen.u1Present)
1046	{
1047	Assert(pIdteTemplate->u16OffsetLow == TRPM_HANDLER_INT);
1048	Assert(sizeof(RTGCPTR) <= sizeof(aGCPtrs[0]));
1049	RTGCPTR Offset = (RTGCPTR)aGCPtrs[pIdteTemplate->u16OffsetLow];
1050
1051	/*
1052	* Generic handlers have different entrypoints for each possible
1053	* vector number. These entrypoints make a sort of an array with
1054	* 8 byte entries where the vector number is the index.
1055	* See TRPMGCHandlersA.asm for details.
1056	*/
1057	Offset += iTrap * 8;
1058
1059	if (pIdte->Gen.u5Type2 != VBOX_IDTE_TYPE2_TASK)
1060	{
1061	pIdte->Gen.u16OffsetLow = Offset & 0xffff;
1062	pIdte->Gen.u16OffsetHigh = Offset >> 16;
1063	pIdte->Gen.u16SegSel = SelCS;
1064	}
1065	}
1066
1067	return VINF_SUCCESS;
1068	}
1069
1070
1071	/**
1072	* Check if address is a gate handler (interrupt or trap).
1073	*
1074	* @returns gate nr or ~0 is not found
1075	*
1076	* @param pVM VM handle.
1077	* @param GCPtr GC address to check.
1078	*/
1079	TRPMR3DECL(uint32_t) TRPMR3QueryGateByHandler(PVM pVM, RTGCPTR GCPtr)
1080	{
1081	for (uint32_t iTrap = 0; iTrap < ELEMENTS(pVM->trpm.s.aGuestTrapHandler); iTrap++)
1082	{
1083	if (pVM->trpm.s.aGuestTrapHandler[iTrap] == GCPtr)
1084	return iTrap;
1085
1086	/* redundant */
1087	if (ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], iTrap))
1088	{
1089	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
1090	RTGCPTR pHandler = (pIdte->Gen.u16OffsetHigh << 16) \| pIdte->Gen.u16OffsetLow;
1091
1092	if (pHandler == GCPtr)
1093	return iTrap;
1094	}
1095	}
1096	return ~0;
1097	}
1098
1099
1100	/**
1101	* Get guest trap/interrupt gate handler
1102	*
1103	* @returns Guest trap handler address or TRPM_INVALID_HANDLER if none installed
1104	* @param pVM The VM to operate on.
1105	* @param iTrap Interrupt/trap number.
1106	*/
1107	TRPMR3DECL(RTGCPTR) TRPMR3GetGuestTrapHandler(PVM pVM, unsigned iTrap)
1108	{
1109	AssertReturn(iTrap < ELEMENTS(pVM->trpm.s.aIdt), TRPM_INVALID_HANDLER);
1110
1111	return pVM->trpm.s.aGuestTrapHandler[iTrap];
1112	}
1113
1114
1115	/**
1116	* Set guest trap/interrupt gate handler
1117	* Used for setting up trap gates used for kernel calls.
1118	*
1119	* @returns VBox status code.
1120	* @param pVM The VM to operate on.
1121	* @param iTrap Interrupt/trap number.
1122	* @param pHandler GC handler pointer
1123	*/
1124	TRPMR3DECL(int) TRPMR3SetGuestTrapHandler(PVM pVM, unsigned iTrap, RTGCPTR pHandler)
1125	{
1126	/*
1127	* Validate.
1128	*/
1129	if (iTrap >= ELEMENTS(pVM->trpm.s.aIdt))
1130	{
1131	AssertMsg(iTrap < TRPM_HANDLER_INT_BASE, ("Illegal gate number %d!\n", iTrap));
1132	return VERR_INVALID_PARAMETER;
1133	}
1134
1135	AssertReturn(pHandler == TRPM_INVALID_HANDLER \|\| PATMIsPatchGCAddr(pVM, pHandler), VERR_INVALID_PARAMETER);
1136
1137	uint16_t cbIDT;
1138	RTGCPTR GCPtrIDT = CPUMGetGuestIDTR(pVM, &cbIDT);
1139	if (iTrap * sizeof(VBOXIDTE) >= cbIDT)
1140	return VERR_INVALID_PARAMETER; /* Silently ignore out of range requests. */
1141
1142	if (pHandler == TRPM_INVALID_HANDLER)
1143	{
1144	/* clear trap handler */
1145	Log(("TRPMR3SetGuestTrapHandler: clear handler %x\n", iTrap));
1146	return trpmClearGuestTrapHandler(pVM, iTrap);
1147	}
1148
1149	/*
1150	* Read the guest IDT entry.
1151	*/
1152	VBOXIDTE GuestIdte;
1153	int rc = PGMPhysReadGCPtr(pVM, &GuestIdte, GCPtrIDT + iTrap * sizeof(GuestIdte), sizeof(GuestIdte));
1154	if (VBOX_FAILURE(rc))
1155	{
1156	AssertMsgRC(rc, ("Failed to read IDTE! rc=%Vrc\n", rc));
1157	return rc;
1158	}
1159
1160	if (EMIsRawRing0Enabled(pVM))
1161	{
1162	/*
1163	* Only replace handlers for which we are 100% certain there won't be
1164	* any host interrupts.
1165	*
1166	* 0x2E is safe on Windows because it's the system service interrupt gate. Not
1167	* quite certain if this is safe or not on 64-bit Vista, it probably is.
1168	*
1169	* 0x80 is safe on Linux because it's the syscall vector and is part of the
1170	* 32-bit usermode ABI. 64-bit Linux (usually) supports 32-bit processes
1171	* and will therefor never assign hardware interrupts to 0x80.
1172	*
1173	* Exactly why 0x80 is safe on 32-bit Windows is a bit hazy, but it seems
1174	* to work ok... However on 64-bit Vista (SMP?) is doesn't work reliably.
1175	* Booting Linux/BSD guest will cause system lockups on most of the computers.
1176	*
1177	* PORTME - Check if your host keeps any of these gates free from hw ints.
1178	*
1179	* Note! SELMR3SyncTSS also has code related to this interrupt handler replacing.
1180	*/
1181	/** @todo handle those dependencies better! */
1182	/** @todo Solve this in a proper manner. see defect #1186 */
1183	#if defined(RT_OS_WINDOWS) && defined(RT_ARCH_X86)
1184	if (iTrap == 0x2E \|\| iTrap == 0x80)
1185	#elif defined(RT_OS_LINUX)
1186	if (iTrap == 0x80)
1187	#else
1188	if (0)
1189	#endif
1190	{
1191	if ( GuestIdte.Gen.u1Present
1192	&& ( GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_TRAP_32
1193	\|\| GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32)
1194	&& GuestIdte.Gen.u2DPL == 3)
1195	{
1196	PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
1197
1198	GuestIdte.Gen.u5Type2 = VBOX_IDTE_TYPE2_TRAP_32;
1199	GuestIdte.Gen.u16OffsetHigh = pHandler >> 16;
1200	GuestIdte.Gen.u16OffsetLow = pHandler & 0xFFFF;
1201	GuestIdte.Gen.u16SegSel \|= 1; //ring 1
1202	*pIdte = GuestIdte;
1203
1204	/* Mark it for relocation purposes. */
1205	ASMBitSet(&pVM->trpm.s.au32IdtPatched[0], iTrap);
1206
1207	/* Also store it in our guest trap array. */
1208	pVM->trpm.s.aGuestTrapHandler[iTrap] = pHandler;
1209
1210	Log(("Setting trap handler %x to %08X (direct)\n", iTrap, pHandler));
1211	return VINF_SUCCESS;
1212	}
1213	/* ok, let's try to install a trampoline handler then. */
1214	}
1215	}
1216
1217	if ( GuestIdte.Gen.u1Present
1218	&& ( GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_TRAP_32
1219	\|\| GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32)
1220	&& (GuestIdte.Gen.u2DPL == 3 \|\| GuestIdte.Gen.u2DPL == 0))
1221	{
1222	/*
1223	* Save handler which can be used for a trampoline call inside the GC
1224	*/
1225	Log(("Setting trap handler %x to %08X\n", iTrap, pHandler));
1226	pVM->trpm.s.aGuestTrapHandler[iTrap] = pHandler;
1227	return VINF_SUCCESS;
1228	}
1229	return VERR_INVALID_PARAMETER;
1230	}
1231
1232
1233	/**
1234	* Check if address is a gate handler (interrupt/trap/task/anything).
1235	*
1236	* @returns True is gate handler, false if not.
1237	*
1238	* @param pVM VM handle.
1239	* @param GCPtr GC address to check.
1240	*/
1241	TRPMR3DECL(bool) TRPMR3IsGateHandler(PVM pVM, RTGCPTR GCPtr)
1242	{
1243	/*
1244	* Read IDTR and calc last entry.
1245	*/
1246	uint16_t cbIDT;
1247	RTGCPTR GCPtrIDTE = CPUMGetGuestIDTR(pVM, &cbIDT);
1248	unsigned cEntries = (cbIDT + 1) / sizeof(VBOXIDTE);
1249	if (!cEntries)
1250	return false;
1251	RTGCPTR GCPtrIDTELast = GCPtrIDTE + (cEntries - 1) * sizeof(VBOXIDTE);
1252
1253	/*
1254	* Outer loop: interate pages.
1255	*/
1256	while (GCPtrIDTE <= GCPtrIDTELast)
1257	{
1258	/*
1259	* Convert this page to a HC address.
1260	* (This function checks for not-present pages.)
1261	*/
1262	PVBOXIDTE pIDTE;
1263	int rc = PGMPhysGCPtr2HCPtr(pVM, GCPtrIDTE, (void **)&pIDTE);
1264	if (VBOX_SUCCESS(rc))
1265	{
1266	/*
1267	* Inner Loop: Iterate the data on this page looking for an entry equal to GCPtr.
1268	* N.B. Member of the Flat Earth Society...
1269	*/
1270	while (GCPtrIDTE <= GCPtrIDTELast)
1271	{
1272	if (pIDTE->Gen.u1Present)
1273	{
1274	RTGCPTR GCPtrHandler = (pIDTE->Gen.u16OffsetHigh << 16) \| pIDTE->Gen.u16OffsetLow;
1275	if (GCPtr == GCPtrHandler)
1276	return true;
1277	}
1278
1279	/* next entry */
1280	if ((GCPtrIDTE & PAGE_OFFSET_MASK) + sizeof(VBOXIDTE) >= PAGE_SIZE)
1281	{
1282	AssertMsg(!(GCPtrIDTE & (sizeof(VBOXIDTE) - 1)),
1283	("IDT is crossing pages and it's not aligned! GCPtrIDTE=%#x cbIDT=%#x\n", GCPtrIDTE, cbIDT));
1284	GCPtrIDTE += sizeof(VBOXIDTE);
1285	break;
1286	}
1287	GCPtrIDTE += sizeof(VBOXIDTE);
1288	pIDTE++;
1289	}
1290	}
1291	else
1292	{
1293	/* Skip to the next page (if any). Take care not to wrap around the address space. */
1294	if ((GCPtrIDTELast >> PAGE_SHIFT) == (GCPtrIDTE >> PAGE_SHIFT))
1295	return false;
1296	GCPtrIDTE = RT_ALIGN_T(GCPtrIDTE, PAGE_SIZE, RTGCPTR) + PAGE_SIZE + (GCPtrIDTE & (sizeof(VBOXIDTE) - 1));
1297	}
1298	}
1299	return false;
1300	}
1301
1302
1303	/**
1304	* Inject event (such as external irq or trap)
1305	*
1306	* @returns VBox status code.
1307	* @param pVM The VM to operate on.
1308	* @param enmEvent Trpm event type
1309	*/
1310	TRPMR3DECL(int) TRPMR3InjectEvent(PVM pVM, TRPMEVENT enmEvent)
1311	{
1312	PCPUMCTX pCtx;
1313	int rc;
1314
1315	rc = CPUMQueryGuestCtxPtr(pVM, &pCtx);
1316	AssertRC(rc);
1317	Assert(!PATMIsPatchGCAddr(pVM, (RTGCPTR)pCtx->eip));
1318	Assert(!VM_FF_ISSET(pVM, VM_FF_INHIBIT_INTERRUPTS));
1319
1320	/* Currently only useful for external hardware interrupts. */
1321	Assert(enmEvent == TRPM_HARDWARE_INT);
1322
1323	if (REMR3QueryPendingInterrupt(pVM) == REM_NO_PENDING_IRQ)
1324	{
1325	#ifdef TRPM_FORWARD_TRAPS_IN_GC
1326
1327	# ifdef LOG_ENABLED
1328	DBGFR3InfoLog(pVM, "cpumguest", "TRPMInject");
1329	DBGFR3DisasInstrCurrentLog(pVM, "TRPMInject");
1330	# endif
1331
1332	uint8_t u8Interrupt;
1333	rc = PDMGetInterrupt(pVM, &u8Interrupt);
1334	Log(("TRPMR3InjectEvent: u8Interrupt=%d (%#x) rc=%Vrc\n", u8Interrupt, u8Interrupt, rc));
1335	if (VBOX_SUCCESS(rc))
1336	{
1337	if (HWACCMR3IsActive(pVM))
1338	{
1339	rc = TRPMAssertTrap(pVM, u8Interrupt, enmEvent);
1340	AssertRC(rc);
1341	STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1342	return VINF_EM_RESCHEDULE_HWACC;
1343	}
1344	/* If the guest gate is not patched, then we will check (again) if we can patch it. */
1345	if (pVM->trpm.s.aGuestTrapHandler[u8Interrupt] == TRPM_INVALID_HANDLER)
1346	{
1347	CSAMR3CheckGates(pVM, u8Interrupt, 1);
1348	Log(("TRPMR3InjectEvent: recheck gate %x -> valid=%d\n", u8Interrupt, TRPMR3GetGuestTrapHandler(pVM, u8Interrupt) != TRPM_INVALID_HANDLER));
1349	}
1350
1351	if (pVM->trpm.s.aGuestTrapHandler[u8Interrupt] != TRPM_INVALID_HANDLER)
1352	{
1353	/* Must check pending forced actions as our IDT or GDT might be out of sync */
1354	EMR3CheckRawForcedActions(pVM);
1355
1356	/* There's a handler -> let's execute it in raw mode */
1357	rc = TRPMForwardTrap(pVM, CPUMCTX2CORE(pCtx), u8Interrupt, 0, TRPM_TRAP_NO_ERRORCODE, enmEvent);
1358	if (rc == VINF_SUCCESS /* Don't use VBOX_SUCCESS */)
1359	{
1360	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));
1361
1362	STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1363	return VINF_EM_RESCHEDULE_RAW;
1364	}
1365	}
1366	else
1367	STAM_COUNTER_INC(&pVM->trpm.s.StatForwardFailNoHandler);
1368	REMR3NotifyPendingInterrupt(pVM, u8Interrupt);
1369	}
1370	else
1371	AssertRC(rc);
1372	#else
1373	if (HWACCMR3IsActive(pVM))
1374	{
1375	uint8_t u8Interrupt;
1376	rc = PDMGetInterrupt(pVM, &u8Interrupt);
1377	Log(("TRPMR3InjectEvent: u8Interrupt=%d (%#x) rc=%Vrc\n", u8Interrupt, u8Interrupt, rc));
1378	if (VBOX_SUCCESS(rc))
1379	{
1380	rc = TRPMAssertTrap(pVM, u8Interrupt, false);
1381	AssertRC(rc);
1382	STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1383	return VINF_EM_RESCHEDULE_HWACC;
1384	}
1385	}
1386	else
1387	AssertRC(rc);
1388	#endif
1389	}
1390	/** @todo check if it's safe to translate the patch address to the original guest address.
1391	* this implies a safe state in translated instructions and should take sti successors into account (instruction fusing)
1392	*/
1393	/* Note: if it's a PATM address, then we'll go back to raw mode regardless of the return code below. */
1394
1395	/* Fall back to the recompiler */
1396	return VINF_EM_RESCHEDULE_REM; /* (Heed the halted state if this is changed!) */
1397	}
1398

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source: vbox/trunk/src/VBox/VMM/TRPM.cpp@ 3696

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