TRPM.cpp@ 2935

Last change on this file since 2935 was 2715, checked in by vboxsync, 18 years ago
One other case where we have to check for pending forced actions before forwarding a trap or interrupt.
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 69.6 KB

Line
1	/* $Id: TRPM.cpp 2715 2007-05-18 14:32:22Z vboxsync $ */
2	/** @file
3	* TRPM - The Trap Monitor
4	*/
5
6	/*
7	* Copyright (C) 2006 InnoTek Systemberatung 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(__WIN__) && defined(__X86__)
1184	if (iTrap == 0x2E \|\| iTrap == 0x80)
1185	#elif defined(__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@ 2935

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