VirtualBox

source: vbox/trunk/src/VBox/VMM/TRPM.cpp@ 1129

Last change on this file since 1129 was 716, checked in by vboxsync, 18 years ago

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1/* $Id: TRPM.cpp 716 2007-02-06 15:56:35Z 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 */
85typedef 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/** First interrupt handler. Used for validating input. */
100#define TRPM_HANDLER_INT_BASE 0x20
101
102
103/*******************************************************************************
104* Global Variables *
105*******************************************************************************/
106/** Preinitialized IDT.
107 * The u16OffsetLow is a value of the TRPMHANDLER enum which TRPMR3Relocate()
108 * will use to pick the right address. The u16SegSel is always VMM CS.
109 */
110static VBOXIDTE_GENERIC g_aIdt[256] =
111{
112/* special trap handler - still, this is an interrupt gate not a trap gate... */
113#define IDTE_TRAP(enm) { (unsigned)enm, 0, 0, VBOX_IDTE_TYPE1, VBOX_IDTE_TYPE2_INT_32, 0, 1, 0 }
114/* generic trap handler. */
115#define IDTE_TRAP_GEN() IDTE_TRAP(TRPM_HANDLER_TRAP)
116/* special interrupt handler. */
117#define IDTE_INT(enm) { (unsigned)enm, 0, 0, VBOX_IDTE_TYPE1, VBOX_IDTE_TYPE2_INT_32, 0, 1, 0 }
118/* generic interrupt handler. */
119#define IDTE_INT_GEN() IDTE_INT(TRPM_HANDLER_INT)
120/* special task gate IDT entry (for critical exceptions like #DF). */
121#define IDTE_TASK(enm) { (unsigned)enm, 0, 0, VBOX_IDTE_TYPE1, VBOX_IDTE_TYPE2_TASK, 0, 1, 0 }
122/* draft, fixme later when the handler is written. */
123#define IDTE_RESERVED() { 0, 0, 0, 0, 0, 0, 0, 0 }
124
125 /* N - M M - T - C - D i */
126 /* o - n o - y - o - e p */
127 /* - e n - p - d - s t */
128 /* - i - e - e - c . */
129 /* - c - - - r */
130 /* ============================================================= */
131 IDTE_TRAP_GEN(), /* 0 - #DE - F - N - Divide error */
132 IDTE_TRAP_GEN(), /* 1 - #DB - F/T - N - Single step, INT 1 instruction */
133#ifdef VBOX_WITH_NMI
134 IDTE_TRAP_GEN(), /* 2 - - I - N - Non-Maskable Interrupt (NMI) */
135#else
136 IDTE_INT_GEN(), /* 2 - - I - N - Non-Maskable Interrupt (NMI) */
137#endif
138 IDTE_TRAP_GEN(), /* 3 - #BP - T - N - Breakpoint, INT 3 instruction. */
139 IDTE_TRAP_GEN(), /* 4 - #OF - T - N - Overflow, INTO instruction. */
140 IDTE_TRAP_GEN(), /* 5 - #BR - F - N - BOUND Range Exceeded, BOUND instruction. */
141 IDTE_TRAP_GEN(), /* 6 - #UD - F - N - Undefined(/Invalid) Opcode. */
142 IDTE_TRAP_GEN(), /* 7 - #NM - F - N - Device not available, FP or (F)WAIT instruction. */
143 IDTE_TASK(TRPM_HANDLER_TRAP_08), /* 8 - #DF - A - 0 - Double fault. */
144 IDTE_TRAP_GEN(), /* 9 - - F - N - Coprocessor Segment Overrun (obsolete). */
145 IDTE_TRAP_GEN(), /* a - #TS - F - Y - Invalid TSS, Taskswitch or TSS access. */
146 IDTE_TRAP_GEN(), /* b - #NP - F - Y - Segment not present. */
147 IDTE_TRAP_GEN(), /* c - #SS - F - Y - Stack-Segment fault. */
148 IDTE_TRAP_GEN(), /* d - #GP - F - Y - General protection fault. */
149 IDTE_TRAP_GEN(), /* e - #PF - F - Y - Page fault. - interrupt gate!!! */
150 IDTE_RESERVED(), /* f - - - - Intel Reserved. Do not use. */
151 IDTE_TRAP_GEN(), /* 10 - #MF - F - N - x86 FPU Floating-Point Error (Math fault), FP or (F)WAIT instruction. */
152 IDTE_TRAP_GEN(), /* 11 - #AC - F - 0 - Alignment Check. */
153 IDTE_TRAP(TRPM_HANDLER_TRAP_12), /* 12 - #MC - A - N - Machine Check. */
154 IDTE_TRAP_GEN(), /* 13 - #XF - F - N - SIMD Floating-Point Exception. */
155 IDTE_RESERVED(), /* 14 - - - - Intel Reserved. Do not use. */
156 IDTE_RESERVED(), /* 15 - - - - Intel Reserved. Do not use. */
157 IDTE_RESERVED(), /* 16 - - - - Intel Reserved. Do not use. */
158 IDTE_RESERVED(), /* 17 - - - - Intel Reserved. Do not use. */
159 IDTE_RESERVED(), /* 18 - - - - Intel Reserved. Do not use. */
160 IDTE_RESERVED(), /* 19 - - - - Intel Reserved. Do not use. */
161 IDTE_RESERVED(), /* 1a - - - - Intel Reserved. Do not use. */
162 IDTE_RESERVED(), /* 1b - - - - Intel Reserved. Do not use. */
163 IDTE_RESERVED(), /* 1c - - - - Intel Reserved. Do not use. */
164 IDTE_RESERVED(), /* 1d - - - - Intel Reserved. Do not use. */
165 IDTE_RESERVED(), /* 1e - - - - Intel Reserved. Do not use. */
166 IDTE_RESERVED(), /* 1f - - - - Intel Reserved. Do not use. */
167 IDTE_INT_GEN(), /* 20 - - I - - User defined Interrupts, external of INT n. */
168 IDTE_INT_GEN(), /* 21 - - I - - User defined Interrupts, external of INT n. */
169 IDTE_INT_GEN(), /* 22 - - I - - User defined Interrupts, external of INT n. */
170 IDTE_INT_GEN(), /* 23 - - I - - User defined Interrupts, external of INT n. */
171 IDTE_INT_GEN(), /* 24 - - I - - User defined Interrupts, external of INT n. */
172 IDTE_INT_GEN(), /* 25 - - I - - User defined Interrupts, external of INT n. */
173 IDTE_INT_GEN(), /* 26 - - I - - User defined Interrupts, external of INT n. */
174 IDTE_INT_GEN(), /* 27 - - I - - User defined Interrupts, external of INT n. */
175 IDTE_INT_GEN(), /* 28 - - I - - User defined Interrupts, external of INT n. */
176 IDTE_INT_GEN(), /* 29 - - I - - User defined Interrupts, external of INT n. */
177 IDTE_INT_GEN(), /* 2a - - I - - User defined Interrupts, external of INT n. */
178 IDTE_INT_GEN(), /* 2b - - I - - User defined Interrupts, external of INT n. */
179 IDTE_INT_GEN(), /* 2c - - I - - User defined Interrupts, external of INT n. */
180 IDTE_INT_GEN(), /* 2d - - I - - User defined Interrupts, external of INT n. */
181 IDTE_INT_GEN(), /* 2e - - I - - User defined Interrupts, external of INT n. */
182 IDTE_INT_GEN(), /* 2f - - I - - User defined Interrupts, external of INT n. */
183 IDTE_INT_GEN(), /* 30 - - I - - User defined Interrupts, external of INT n. */
184 IDTE_INT_GEN(), /* 31 - - I - - User defined Interrupts, external of INT n. */
185 IDTE_INT_GEN(), /* 32 - - I - - User defined Interrupts, external of INT n. */
186 IDTE_INT_GEN(), /* 33 - - I - - User defined Interrupts, external of INT n. */
187 IDTE_INT_GEN(), /* 34 - - I - - User defined Interrupts, external of INT n. */
188 IDTE_INT_GEN(), /* 35 - - I - - User defined Interrupts, external of INT n. */
189 IDTE_INT_GEN(), /* 36 - - I - - User defined Interrupts, external of INT n. */
190 IDTE_INT_GEN(), /* 37 - - I - - User defined Interrupts, external of INT n. */
191 IDTE_INT_GEN(), /* 38 - - I - - User defined Interrupts, external of INT n. */
192 IDTE_INT_GEN(), /* 39 - - I - - User defined Interrupts, external of INT n. */
193 IDTE_INT_GEN(), /* 3a - - I - - User defined Interrupts, external of INT n. */
194 IDTE_INT_GEN(), /* 3b - - I - - User defined Interrupts, external of INT n. */
195 IDTE_INT_GEN(), /* 3c - - I - - User defined Interrupts, external of INT n. */
196 IDTE_INT_GEN(), /* 3d - - I - - User defined Interrupts, external of INT n. */
197 IDTE_INT_GEN(), /* 3e - - I - - User defined Interrupts, external of INT n. */
198 IDTE_INT_GEN(), /* 3f - - I - - User defined Interrupts, external of INT n. */
199 IDTE_INT_GEN(), /* 40 - - I - - User defined Interrupts, external of INT n. */
200 IDTE_INT_GEN(), /* 41 - - I - - User defined Interrupts, external of INT n. */
201 IDTE_INT_GEN(), /* 42 - - I - - User defined Interrupts, external of INT n. */
202 IDTE_INT_GEN(), /* 43 - - I - - User defined Interrupts, external of INT n. */
203 IDTE_INT_GEN(), /* 44 - - I - - User defined Interrupts, external of INT n. */
204 IDTE_INT_GEN(), /* 45 - - I - - User defined Interrupts, external of INT n. */
205 IDTE_INT_GEN(), /* 46 - - I - - User defined Interrupts, external of INT n. */
206 IDTE_INT_GEN(), /* 47 - - I - - User defined Interrupts, external of INT n. */
207 IDTE_INT_GEN(), /* 48 - - I - - User defined Interrupts, external of INT n. */
208 IDTE_INT_GEN(), /* 49 - - I - - User defined Interrupts, external of INT n. */
209 IDTE_INT_GEN(), /* 4a - - I - - User defined Interrupts, external of INT n. */
210 IDTE_INT_GEN(), /* 4b - - I - - User defined Interrupts, external of INT n. */
211 IDTE_INT_GEN(), /* 4c - - I - - User defined Interrupts, external of INT n. */
212 IDTE_INT_GEN(), /* 4d - - I - - User defined Interrupts, external of INT n. */
213 IDTE_INT_GEN(), /* 4e - - I - - User defined Interrupts, external of INT n. */
214 IDTE_INT_GEN(), /* 4f - - I - - User defined Interrupts, external of INT n. */
215 IDTE_INT_GEN(), /* 50 - - I - - User defined Interrupts, external of INT n. */
216 IDTE_INT_GEN(), /* 51 - - I - - User defined Interrupts, external of INT n. */
217 IDTE_INT_GEN(), /* 52 - - I - - User defined Interrupts, external of INT n. */
218 IDTE_INT_GEN(), /* 53 - - I - - User defined Interrupts, external of INT n. */
219 IDTE_INT_GEN(), /* 54 - - I - - User defined Interrupts, external of INT n. */
220 IDTE_INT_GEN(), /* 55 - - I - - User defined Interrupts, external of INT n. */
221 IDTE_INT_GEN(), /* 56 - - I - - User defined Interrupts, external of INT n. */
222 IDTE_INT_GEN(), /* 57 - - I - - User defined Interrupts, external of INT n. */
223 IDTE_INT_GEN(), /* 58 - - I - - User defined Interrupts, external of INT n. */
224 IDTE_INT_GEN(), /* 59 - - I - - User defined Interrupts, external of INT n. */
225 IDTE_INT_GEN(), /* 5a - - I - - User defined Interrupts, external of INT n. */
226 IDTE_INT_GEN(), /* 5b - - I - - User defined Interrupts, external of INT n. */
227 IDTE_INT_GEN(), /* 5c - - I - - User defined Interrupts, external of INT n. */
228 IDTE_INT_GEN(), /* 5d - - I - - User defined Interrupts, external of INT n. */
229 IDTE_INT_GEN(), /* 5e - - I - - User defined Interrupts, external of INT n. */
230 IDTE_INT_GEN(), /* 5f - - I - - User defined Interrupts, external of INT n. */
231 IDTE_INT_GEN(), /* 60 - - I - - User defined Interrupts, external of INT n. */
232 IDTE_INT_GEN(), /* 61 - - I - - User defined Interrupts, external of INT n. */
233 IDTE_INT_GEN(), /* 62 - - I - - User defined Interrupts, external of INT n. */
234 IDTE_INT_GEN(), /* 63 - - I - - User defined Interrupts, external of INT n. */
235 IDTE_INT_GEN(), /* 64 - - I - - User defined Interrupts, external of INT n. */
236 IDTE_INT_GEN(), /* 65 - - I - - User defined Interrupts, external of INT n. */
237 IDTE_INT_GEN(), /* 66 - - I - - User defined Interrupts, external of INT n. */
238 IDTE_INT_GEN(), /* 67 - - I - - User defined Interrupts, external of INT n. */
239 IDTE_INT_GEN(), /* 68 - - I - - User defined Interrupts, external of INT n. */
240 IDTE_INT_GEN(), /* 69 - - I - - User defined Interrupts, external of INT n. */
241 IDTE_INT_GEN(), /* 6a - - I - - User defined Interrupts, external of INT n. */
242 IDTE_INT_GEN(), /* 6b - - I - - User defined Interrupts, external of INT n. */
243 IDTE_INT_GEN(), /* 6c - - I - - User defined Interrupts, external of INT n. */
244 IDTE_INT_GEN(), /* 6d - - I - - User defined Interrupts, external of INT n. */
245 IDTE_INT_GEN(), /* 6e - - I - - User defined Interrupts, external of INT n. */
246 IDTE_INT_GEN(), /* 6f - - I - - User defined Interrupts, external of INT n. */
247 IDTE_INT_GEN(), /* 70 - - I - - User defined Interrupts, external of INT n. */
248 IDTE_INT_GEN(), /* 71 - - I - - User defined Interrupts, external of INT n. */
249 IDTE_INT_GEN(), /* 72 - - I - - User defined Interrupts, external of INT n. */
250 IDTE_INT_GEN(), /* 73 - - I - - User defined Interrupts, external of INT n. */
251 IDTE_INT_GEN(), /* 74 - - I - - User defined Interrupts, external of INT n. */
252 IDTE_INT_GEN(), /* 75 - - I - - User defined Interrupts, external of INT n. */
253 IDTE_INT_GEN(), /* 76 - - I - - User defined Interrupts, external of INT n. */
254 IDTE_INT_GEN(), /* 77 - - I - - User defined Interrupts, external of INT n. */
255 IDTE_INT_GEN(), /* 78 - - I - - User defined Interrupts, external of INT n. */
256 IDTE_INT_GEN(), /* 79 - - I - - User defined Interrupts, external of INT n. */
257 IDTE_INT_GEN(), /* 7a - - I - - User defined Interrupts, external of INT n. */
258 IDTE_INT_GEN(), /* 7b - - I - - User defined Interrupts, external of INT n. */
259 IDTE_INT_GEN(), /* 7c - - I - - User defined Interrupts, external of INT n. */
260 IDTE_INT_GEN(), /* 7d - - I - - User defined Interrupts, external of INT n. */
261 IDTE_INT_GEN(), /* 7e - - I - - User defined Interrupts, external of INT n. */
262 IDTE_INT_GEN(), /* 7f - - I - - User defined Interrupts, external of INT n. */
263 IDTE_INT_GEN(), /* 80 - - I - - User defined Interrupts, external of INT n. */
264 IDTE_INT_GEN(), /* 81 - - I - - User defined Interrupts, external of INT n. */
265 IDTE_INT_GEN(), /* 82 - - I - - User defined Interrupts, external of INT n. */
266 IDTE_INT_GEN(), /* 83 - - I - - User defined Interrupts, external of INT n. */
267 IDTE_INT_GEN(), /* 84 - - I - - User defined Interrupts, external of INT n. */
268 IDTE_INT_GEN(), /* 85 - - I - - User defined Interrupts, external of INT n. */
269 IDTE_INT_GEN(), /* 86 - - I - - User defined Interrupts, external of INT n. */
270 IDTE_INT_GEN(), /* 87 - - I - - User defined Interrupts, external of INT n. */
271 IDTE_INT_GEN(), /* 88 - - I - - User defined Interrupts, external of INT n. */
272 IDTE_INT_GEN(), /* 89 - - I - - User defined Interrupts, external of INT n. */
273 IDTE_INT_GEN(), /* 8a - - I - - User defined Interrupts, external of INT n. */
274 IDTE_INT_GEN(), /* 8b - - I - - User defined Interrupts, external of INT n. */
275 IDTE_INT_GEN(), /* 8c - - I - - User defined Interrupts, external of INT n. */
276 IDTE_INT_GEN(), /* 8d - - I - - User defined Interrupts, external of INT n. */
277 IDTE_INT_GEN(), /* 8e - - I - - User defined Interrupts, external of INT n. */
278 IDTE_INT_GEN(), /* 8f - - I - - User defined Interrupts, external of INT n. */
279 IDTE_INT_GEN(), /* 90 - - I - - User defined Interrupts, external of INT n. */
280 IDTE_INT_GEN(), /* 91 - - I - - User defined Interrupts, external of INT n. */
281 IDTE_INT_GEN(), /* 92 - - I - - User defined Interrupts, external of INT n. */
282 IDTE_INT_GEN(), /* 93 - - I - - User defined Interrupts, external of INT n. */
283 IDTE_INT_GEN(), /* 94 - - I - - User defined Interrupts, external of INT n. */
284 IDTE_INT_GEN(), /* 95 - - I - - User defined Interrupts, external of INT n. */
285 IDTE_INT_GEN(), /* 96 - - I - - User defined Interrupts, external of INT n. */
286 IDTE_INT_GEN(), /* 97 - - I - - User defined Interrupts, external of INT n. */
287 IDTE_INT_GEN(), /* 98 - - I - - User defined Interrupts, external of INT n. */
288 IDTE_INT_GEN(), /* 99 - - I - - User defined Interrupts, external of INT n. */
289 IDTE_INT_GEN(), /* 9a - - I - - User defined Interrupts, external of INT n. */
290 IDTE_INT_GEN(), /* 9b - - I - - User defined Interrupts, external of INT n. */
291 IDTE_INT_GEN(), /* 9c - - I - - User defined Interrupts, external of INT n. */
292 IDTE_INT_GEN(), /* 9d - - I - - User defined Interrupts, external of INT n. */
293 IDTE_INT_GEN(), /* 9e - - I - - User defined Interrupts, external of INT n. */
294 IDTE_INT_GEN(), /* 9f - - I - - User defined Interrupts, external of INT n. */
295 IDTE_INT_GEN(), /* a0 - - I - - User defined Interrupts, external of INT n. */
296 IDTE_INT_GEN(), /* a1 - - I - - User defined Interrupts, external of INT n. */
297 IDTE_INT_GEN(), /* a2 - - I - - User defined Interrupts, external of INT n. */
298 IDTE_INT_GEN(), /* a3 - - I - - User defined Interrupts, external of INT n. */
299 IDTE_INT_GEN(), /* a4 - - I - - User defined Interrupts, external of INT n. */
300 IDTE_INT_GEN(), /* a5 - - I - - User defined Interrupts, external of INT n. */
301 IDTE_INT_GEN(), /* a6 - - I - - User defined Interrupts, external of INT n. */
302 IDTE_INT_GEN(), /* a7 - - I - - User defined Interrupts, external of INT n. */
303 IDTE_INT_GEN(), /* a8 - - I - - User defined Interrupts, external of INT n. */
304 IDTE_INT_GEN(), /* a9 - - I - - User defined Interrupts, external of INT n. */
305 IDTE_INT_GEN(), /* aa - - I - - User defined Interrupts, external of INT n. */
306 IDTE_INT_GEN(), /* ab - - I - - User defined Interrupts, external of INT n. */
307 IDTE_INT_GEN(), /* ac - - I - - User defined Interrupts, external of INT n. */
308 IDTE_INT_GEN(), /* ad - - I - - User defined Interrupts, external of INT n. */
309 IDTE_INT_GEN(), /* ae - - I - - User defined Interrupts, external of INT n. */
310 IDTE_INT_GEN(), /* af - - I - - User defined Interrupts, external of INT n. */
311 IDTE_INT_GEN(), /* b0 - - I - - User defined Interrupts, external of INT n. */
312 IDTE_INT_GEN(), /* b1 - - I - - User defined Interrupts, external of INT n. */
313 IDTE_INT_GEN(), /* b2 - - I - - User defined Interrupts, external of INT n. */
314 IDTE_INT_GEN(), /* b3 - - I - - User defined Interrupts, external of INT n. */
315 IDTE_INT_GEN(), /* b4 - - I - - User defined Interrupts, external of INT n. */
316 IDTE_INT_GEN(), /* b5 - - I - - User defined Interrupts, external of INT n. */
317 IDTE_INT_GEN(), /* b6 - - I - - User defined Interrupts, external of INT n. */
318 IDTE_INT_GEN(), /* b7 - - I - - User defined Interrupts, external of INT n. */
319 IDTE_INT_GEN(), /* b8 - - I - - User defined Interrupts, external of INT n. */
320 IDTE_INT_GEN(), /* b9 - - I - - User defined Interrupts, external of INT n. */
321 IDTE_INT_GEN(), /* ba - - I - - User defined Interrupts, external of INT n. */
322 IDTE_INT_GEN(), /* bb - - I - - User defined Interrupts, external of INT n. */
323 IDTE_INT_GEN(), /* bc - - I - - User defined Interrupts, external of INT n. */
324 IDTE_INT_GEN(), /* bd - - I - - User defined Interrupts, external of INT n. */
325 IDTE_INT_GEN(), /* be - - I - - User defined Interrupts, external of INT n. */
326 IDTE_INT_GEN(), /* bf - - I - - User defined Interrupts, external of INT n. */
327 IDTE_INT_GEN(), /* c0 - - I - - User defined Interrupts, external of INT n. */
328 IDTE_INT_GEN(), /* c1 - - I - - User defined Interrupts, external of INT n. */
329 IDTE_INT_GEN(), /* c2 - - I - - User defined Interrupts, external of INT n. */
330 IDTE_INT_GEN(), /* c3 - - I - - User defined Interrupts, external of INT n. */
331 IDTE_INT_GEN(), /* c4 - - I - - User defined Interrupts, external of INT n. */
332 IDTE_INT_GEN(), /* c5 - - I - - User defined Interrupts, external of INT n. */
333 IDTE_INT_GEN(), /* c6 - - I - - User defined Interrupts, external of INT n. */
334 IDTE_INT_GEN(), /* c7 - - I - - User defined Interrupts, external of INT n. */
335 IDTE_INT_GEN(), /* c8 - - I - - User defined Interrupts, external of INT n. */
336 IDTE_INT_GEN(), /* c9 - - I - - User defined Interrupts, external of INT n. */
337 IDTE_INT_GEN(), /* ca - - I - - User defined Interrupts, external of INT n. */
338 IDTE_INT_GEN(), /* cb - - I - - User defined Interrupts, external of INT n. */
339 IDTE_INT_GEN(), /* cc - - I - - User defined Interrupts, external of INT n. */
340 IDTE_INT_GEN(), /* cd - - I - - User defined Interrupts, external of INT n. */
341 IDTE_INT_GEN(), /* ce - - I - - User defined Interrupts, external of INT n. */
342 IDTE_INT_GEN(), /* cf - - I - - User defined Interrupts, external of INT n. */
343 IDTE_INT_GEN(), /* d0 - - I - - User defined Interrupts, external of INT n. */
344 IDTE_INT_GEN(), /* d1 - - I - - User defined Interrupts, external of INT n. */
345 IDTE_INT_GEN(), /* d2 - - I - - User defined Interrupts, external of INT n. */
346 IDTE_INT_GEN(), /* d3 - - I - - User defined Interrupts, external of INT n. */
347 IDTE_INT_GEN(), /* d4 - - I - - User defined Interrupts, external of INT n. */
348 IDTE_INT_GEN(), /* d5 - - I - - User defined Interrupts, external of INT n. */
349 IDTE_INT_GEN(), /* d6 - - I - - User defined Interrupts, external of INT n. */
350 IDTE_INT_GEN(), /* d7 - - I - - User defined Interrupts, external of INT n. */
351 IDTE_INT_GEN(), /* d8 - - I - - User defined Interrupts, external of INT n. */
352 IDTE_INT_GEN(), /* d9 - - I - - User defined Interrupts, external of INT n. */
353 IDTE_INT_GEN(), /* da - - I - - User defined Interrupts, external of INT n. */
354 IDTE_INT_GEN(), /* db - - I - - User defined Interrupts, external of INT n. */
355 IDTE_INT_GEN(), /* dc - - I - - User defined Interrupts, external of INT n. */
356 IDTE_INT_GEN(), /* dd - - I - - User defined Interrupts, external of INT n. */
357 IDTE_INT_GEN(), /* de - - I - - User defined Interrupts, external of INT n. */
358 IDTE_INT_GEN(), /* df - - I - - User defined Interrupts, external of INT n. */
359 IDTE_INT_GEN(), /* e0 - - I - - User defined Interrupts, external of INT n. */
360 IDTE_INT_GEN(), /* e1 - - I - - User defined Interrupts, external of INT n. */
361 IDTE_INT_GEN(), /* e2 - - I - - User defined Interrupts, external of INT n. */
362 IDTE_INT_GEN(), /* e3 - - I - - User defined Interrupts, external of INT n. */
363 IDTE_INT_GEN(), /* e4 - - I - - User defined Interrupts, external of INT n. */
364 IDTE_INT_GEN(), /* e5 - - I - - User defined Interrupts, external of INT n. */
365 IDTE_INT_GEN(), /* e6 - - I - - User defined Interrupts, external of INT n. */
366 IDTE_INT_GEN(), /* e7 - - I - - User defined Interrupts, external of INT n. */
367 IDTE_INT_GEN(), /* e8 - - I - - User defined Interrupts, external of INT n. */
368 IDTE_INT_GEN(), /* e9 - - I - - User defined Interrupts, external of INT n. */
369 IDTE_INT_GEN(), /* ea - - I - - User defined Interrupts, external of INT n. */
370 IDTE_INT_GEN(), /* eb - - I - - User defined Interrupts, external of INT n. */
371 IDTE_INT_GEN(), /* ec - - I - - User defined Interrupts, external of INT n. */
372 IDTE_INT_GEN(), /* ed - - I - - User defined Interrupts, external of INT n. */
373 IDTE_INT_GEN(), /* ee - - I - - User defined Interrupts, external of INT n. */
374 IDTE_INT_GEN(), /* ef - - I - - User defined Interrupts, external of INT n. */
375 IDTE_INT_GEN(), /* f0 - - I - - User defined Interrupts, external of INT n. */
376 IDTE_INT_GEN(), /* f1 - - I - - User defined Interrupts, external of INT n. */
377 IDTE_INT_GEN(), /* f2 - - I - - User defined Interrupts, external of INT n. */
378 IDTE_INT_GEN(), /* f3 - - I - - User defined Interrupts, external of INT n. */
379 IDTE_INT_GEN(), /* f4 - - I - - User defined Interrupts, external of INT n. */
380 IDTE_INT_GEN(), /* f5 - - I - - User defined Interrupts, external of INT n. */
381 IDTE_INT_GEN(), /* f6 - - I - - User defined Interrupts, external of INT n. */
382 IDTE_INT_GEN(), /* f7 - - I - - User defined Interrupts, external of INT n. */
383 IDTE_INT_GEN(), /* f8 - - I - - User defined Interrupts, external of INT n. */
384 IDTE_INT_GEN(), /* f9 - - I - - User defined Interrupts, external of INT n. */
385 IDTE_INT_GEN(), /* fa - - I - - User defined Interrupts, external of INT n. */
386 IDTE_INT_GEN(), /* fb - - I - - User defined Interrupts, external of INT n. */
387 IDTE_INT_GEN(), /* fc - - I - - User defined Interrupts, external of INT n. */
388 IDTE_INT_GEN(), /* fd - - I - - User defined Interrupts, external of INT n. */
389 IDTE_INT_GEN(), /* fe - - I - - User defined Interrupts, external of INT n. */
390 IDTE_INT_GEN(), /* ff - - I - - User defined Interrupts, external of INT n. */
391#undef IDTE_TRAP
392#undef IDTE_TRAP_GEN
393#undef IDTE_INT
394#undef IDTE_INT_GEN
395#undef IDTE_TASK
396#undef IDTE_UNUSED
397#undef IDTE_RESERVED
398};
399
400
401/**
402 * Enable or disable tracking of Guest's IDT.
403 * @{
404 */
405#define TRPM_TRACK_GUEST_IDT_CHANGES
406/** @} */
407
408/**
409 * Enable or disable tracking of Shadow IDT.
410 * @{
411 */
412#define TRPM_TRACK_SHADOW_IDT_CHANGES
413/** @} */
414
415/** TRPM saved state version. */
416#define TRPM_SAVED_STATE_VERSION 7
417
418
419/*******************************************************************************
420* Internal Functions *
421*******************************************************************************/
422static DECLCALLBACK(int) trpmR3Save(PVM pVM, PSSMHANDLE pSSM);
423static DECLCALLBACK(int) trpmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version);
424static DECLCALLBACK(int) trpmGuestIDTWriteHandler(PVM pVM, RTGCPTR GCPtr, void *pvPtr, void *pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser);
425
426
427/**
428 * Initializes the Trap Manager
429 *
430 * @returns VBox status code.
431 * @param pVM The VM to operate on.
432 */
433TRPMR3DECL(int) TRPMR3Init(PVM pVM)
434{
435 LogFlow(("TRPMR3Init\n"));
436 /*
437 * Assert sizes and alignments.
438 */
439 AssertRelease(!(RT_OFFSETOF(VM, trpm.s) & 31));
440 AssertRelease(!(RT_OFFSETOF(VM, trpm.s.aIdt) & 15));
441 AssertRelease(sizeof(pVM->trpm.s) <= sizeof(pVM->trpm.padding));
442 AssertRelease(ELEMENTS(pVM->trpm.s.aGuestTrapHandler) == sizeof(pVM->trpm.s.au32IdtPatched)*8);
443
444 /*
445 * Initialize members.
446 */
447 pVM->trpm.s.offVM = RT_OFFSETOF(VM, trpm);
448 pVM->trpm.s.uActiveVector = ~0;
449 pVM->trpm.s.GuestIdtr.pIdt = ~0;
450 pVM->trpm.s.GCPtrIdt = ~0;
451 pVM->trpm.s.fDisableMonitoring = false;
452
453 /*
454 * Initialize the IDT.
455 * The handler addresses will be set in the TRPMR3Relocate() function.
456 */
457 Assert(sizeof(pVM->trpm.s.aIdt) == sizeof(g_aIdt));
458 memcpy(&pVM->trpm.s.aIdt[0], &g_aIdt[0], sizeof(pVM->trpm.s.aIdt));
459
460 /*
461 * Register the saved state data unit.
462 */
463 int rc = SSMR3RegisterInternal(pVM, "trpm", 1, TRPM_SAVED_STATE_VERSION, sizeof(TRPM),
464 NULL, trpmR3Save, NULL,
465 NULL, trpmR3Load, NULL);
466 if (VBOX_FAILURE(rc))
467 return rc;
468
469 /*
470 * Statistics.
471 */
472 STAM_REG(pVM, &pVM->trpm.s.StatGCWriteGuestIDT, STAMTYPE_COUNTER, "/TRPM/GC/Write/Guest/IDT", STAMUNIT_OCCURENCES, "The number of writes to the Guest IDT.");
473
474 STAM_REG(pVM, &pVM->trpm.s.StatSyncIDT, STAMTYPE_PROFILE, "/PROF/TRPM/SyncIDT", STAMUNIT_TICKS_PER_CALL, "Profiling of TRPMR3SyncIDT().");
475
476 /* traps */
477 STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x00], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/00", STAMUNIT_TICKS_PER_CALL, "#DE - Divide error.");
478 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).");
479 //STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x02], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/02", STAMUNIT_TICKS_PER_CALL, "NMI");
480 STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x03], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/03", STAMUNIT_TICKS_PER_CALL, "#BP - Breakpoint.");
481 STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x04], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/04", STAMUNIT_TICKS_PER_CALL, "#OF - Overflow.");
482 STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x05], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/05", STAMUNIT_TICKS_PER_CALL, "#BR - Bound range exceeded.");
483 STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x06], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/06", STAMUNIT_TICKS_PER_CALL, "#UD - Undefined opcode.");
484 STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x07], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/07", STAMUNIT_TICKS_PER_CALL, "#NM - Device not available (FPU).");
485 //STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x08], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/08", STAMUNIT_TICKS_PER_CALL, "#DF - Double fault.");
486 STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x09], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/09", STAMUNIT_TICKS_PER_CALL, "#?? - Coprocessor segment overrun (obsolete).");
487 STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0a], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0a", STAMUNIT_TICKS_PER_CALL, "#TS - Task switch fault.");
488 STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0b], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0b", STAMUNIT_TICKS_PER_CALL, "#NP - Segemnt not present.");
489 STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0c], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0c", STAMUNIT_TICKS_PER_CALL, "#SS - Stack segment fault.");
490 STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0d], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0d", STAMUNIT_TICKS_PER_CALL, "#GP - General protection fault.");
491 STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0e], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0e", STAMUNIT_TICKS_PER_CALL, "#PF - Page fault.");
492 //STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x0f], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/0f", STAMUNIT_TICKS_PER_CALL, "Reserved.");
493 STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x10], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/10", STAMUNIT_TICKS_PER_CALL, "#MF - Math fault..");
494 STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x11], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/11", STAMUNIT_TICKS_PER_CALL, "#AC - Alignment check.");
495 STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x12], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/12", STAMUNIT_TICKS_PER_CALL, "#MC - Machine check.");
496 STAM_REG(pVM, &pVM->trpm.s.aStatGCTraps[0x13], STAMTYPE_PROFILE_ADV, "/TRPM/GC/Traps/13", STAMUNIT_TICKS_PER_CALL, "#XF - SIMD Floating-Point Exception.");
497
498#ifdef VBOX_WITH_STATISTICS
499 rc = MMHyperAlloc(pVM, sizeof(STAMCOUNTER) * 255, 8, MM_TAG_STAM, (void **)&pVM->trpm.s.paStatForwardedIRQR3);
500 AssertRCReturn(rc, rc);
501 pVM->trpm.s.paStatForwardedIRQGC = MMHyperR3ToGC(pVM, pVM->trpm.s.paStatForwardedIRQR3);
502 pVM->trpm.s.paStatForwardedIRQR0 = MMHyperR3ToR0(pVM, pVM->trpm.s.paStatForwardedIRQR3);
503 for (unsigned i = 0; i < 255; i++)
504 STAMR3RegisterF(pVM, &pVM->trpm.s.paStatForwardedIRQR3[i], STAMTYPE_COUNTER, STAMVISIBILITY_USED, STAMUNIT_OCCURENCES, "Forwarded interrupts.",
505 i < 0x20 ? "/TRPM/ForwardRaw/TRAP/%02X" : "/TRPM/ForwardRaw/IRQ/%02X", i);
506#endif
507 STAM_REG(pVM, &pVM->trpm.s.StatForwardFailNoHandler, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/Fail/NoHandler", STAMUNIT_OCCURENCES, "Failure to forward interrupt in raw mode.");
508 STAM_REG(pVM, &pVM->trpm.s.StatForwardFailPatchAddr, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/Fail/PatchAddr", STAMUNIT_OCCURENCES, "Failure to forward interrupt in raw mode.");
509
510 STAM_REG(pVM, &pVM->trpm.s.StatForwardFailGC, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/Fail/GC", STAMUNIT_OCCURENCES, "Failure to forward interrupt in raw mode.");
511 STAM_REG(pVM, &pVM->trpm.s.StatForwardFailHC, STAMTYPE_COUNTER, "/TRPM/ForwardRaw/Fail/HC", STAMUNIT_OCCURENCES, "Failure to forward interrupt in raw mode.");
512 STAM_REG(pVM, &pVM->trpm.s.StatForwardProfGC, STAMTYPE_PROFILE_ADV, "/TRPM/ForwardRaw/Prof/GC", STAMUNIT_TICKS_PER_CALL, "Profiling TRPMForwardTrap.");
513 STAM_REG(pVM, &pVM->trpm.s.StatForwardProfHC, STAMTYPE_PROFILE_ADV, "/TRPM/ForwardRaw/Prof/HC", STAMUNIT_TICKS_PER_CALL, "Profiling TRPMForwardTrap.");
514
515 STAM_REG(pVM, &pVM->trpm.s.StatTrap0dDisasm, STAMTYPE_PROFILE_ADV, "/TRPM/Trap0d/Prof/Disasm", STAMUNIT_TICKS_PER_CALL, "Profiling trpmGCTrap0dHandler.");
516
517 /*
518 * Default action when entering raw mode for the first time
519 */
520 VM_FF_SET(pVM, VM_FF_TRPM_SYNC_IDT);
521 return 0;
522}
523
524
525/**
526 * Applies relocations to data and code managed by this component.
527 *
528 * This function will be called at init and whenever the VMM need
529 * to relocate itself inside the GC.
530 *
531 * @param pVM The VM handle.
532 * @param offDelta Relocation delta relative to old location.
533 */
534TRPMR3DECL(void) TRPMR3Relocate(PVM pVM, RTGCINTPTR offDelta)
535{
536 LogFlow(("TRPMR3Relocate\n"));
537 /*
538 * Get the trap handler addresses.
539 *
540 * If VMMGC.gc is screwed, so are we. We'll assert here since it elsewise
541 * would make init order impossible if we should assert the presence of these
542 * exports in TRPMR3Init().
543 */
544 RTGCPTR aGCPtrs[TRPM_HANDLER_MAX] = {0};
545 int rc;
546 rc = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerInterupt", &aGCPtrs[TRPM_HANDLER_INT]);
547 AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerInterupt in VMMGC.gc!\n"));
548
549 rc = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerGeneric", &aGCPtrs[TRPM_HANDLER_TRAP]);
550 AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerGeneric in VMMGC.gc!\n"));
551
552 rc = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerTrap08", &aGCPtrs[TRPM_HANDLER_TRAP_08]);
553 AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerTrap08 in VMMGC.gc!\n"));
554
555 rc = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerTrap12", &aGCPtrs[TRPM_HANDLER_TRAP_12]);
556 AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerTrap12 in VMMGC.gc!\n"));
557
558 RTSEL SelCS = CPUMGetHyperCS(pVM);
559
560 /*
561 * Iterate the idt and set the addresses.
562 */
563 PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[0];
564 PVBOXIDTE_GENERIC pIdteTemplate = &g_aIdt[0];
565 for (unsigned i = 0; i < ELEMENTS(pVM->trpm.s.aIdt); i++, pIdte++, pIdteTemplate++)
566 {
567 if ( pIdte->Gen.u1Present
568 && !ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], i)
569 )
570 {
571 Assert(pIdteTemplate->u16OffsetLow < TRPM_HANDLER_MAX);
572 RTGCPTR Offset = aGCPtrs[pIdteTemplate->u16OffsetLow];
573 switch (pIdteTemplate->u16OffsetLow)
574 {
575 /*
576 * Generic handlers have different entrypoints for each possible
577 * vector number. These entrypoints makes a sort of an array with
578 * 8 byte entries where the vector number is the index.
579 * See TRPMGCHandlersA.asm for details.
580 */
581 case TRPM_HANDLER_INT:
582 case TRPM_HANDLER_TRAP:
583 Offset += i * 8;
584 break;
585 case TRPM_HANDLER_TRAP_12:
586 break;
587 case TRPM_HANDLER_TRAP_08:
588 /* Handle #DF Task Gate in special way. */
589 pIdte->Gen.u16SegSel = SELMGetTrap8Selector(pVM);
590 pIdte->Gen.u16OffsetLow = 0;
591 pIdte->Gen.u16OffsetHigh = 0;
592 SELMSetTrap8EIP(pVM, Offset);
593 continue;
594 }
595 /* (non-task gates only ) */
596 pIdte->Gen.u16OffsetLow = Offset & 0xffff;
597 pIdte->Gen.u16OffsetHigh = Offset >> 16;
598 pIdte->Gen.u16SegSel = SelCS;
599 }
600 }
601
602 /*
603 * Update IDTR (limit is including!).
604 */
605 CPUMSetHyperIDTR(pVM, VM_GUEST_ADDR(pVM, &pVM->trpm.s.aIdt[0]), sizeof(pVM->trpm.s.aIdt)-1);
606
607 if (!pVM->trpm.s.fDisableMonitoring)
608 {
609#ifdef TRPM_TRACK_SHADOW_IDT_CHANGES
610 if (pVM->trpm.s.GCPtrIdt != ~0U)
611 {
612 rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GCPtrIdt);
613 AssertRC(rc);
614 }
615 pVM->trpm.s.GCPtrIdt = VM_GUEST_ADDR(pVM, &pVM->trpm.s.aIdt[0]);
616 rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_HYPERVISOR, pVM->trpm.s.GCPtrIdt, pVM->trpm.s.GCPtrIdt + sizeof(pVM->trpm.s.aIdt) - 1,
617 0, 0, "trpmgcShadowIDTWriteHandler", 0, "Shadow IDT write access handler");
618 AssertRC(rc);
619#endif
620 }
621
622 /* Relocate IDT handlers for forwarding guest traps/interrupts. */
623 for (uint32_t iTrap = 0; iTrap < ELEMENTS(pVM->trpm.s.aGuestTrapHandler); iTrap++)
624 {
625 if (pVM->trpm.s.aGuestTrapHandler[iTrap])
626 {
627 Log(("TRPMR3Relocate: iGate=%2X Handler %VGv -> %VGv\n", iTrap, pVM->trpm.s.aGuestTrapHandler[iTrap], pVM->trpm.s.aGuestTrapHandler[iTrap] + offDelta));
628 pVM->trpm.s.aGuestTrapHandler[iTrap] += offDelta;
629 }
630
631 if (ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], iTrap))
632 {
633 PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
634 RTGCPTR pHandler = (pIdte->Gen.u16OffsetHigh << 16) | pIdte->Gen.u16OffsetLow;
635
636 Log(("TRPMR3Relocate: *iGate=%2X Handler %VGv -> %VGv\n", iTrap, pHandler, pHandler + offDelta));
637 pHandler += offDelta;
638
639 pIdte->Gen.u16OffsetHigh = pHandler >> 16;
640 pIdte->Gen.u16OffsetLow = pHandler & 0xFFFF;
641
642 }
643 }
644
645 pVM->trpm.s.paStatForwardedIRQGC += offDelta;
646 pVM->trpm.s.paStatForwardedIRQR0 = MMHyperR3ToR0(pVM, pVM->trpm.s.paStatForwardedIRQR3);
647}
648
649
650/**
651 * Terminates the Trap Manager
652 *
653 * @returns VBox status code.
654 * @param pVM The VM to operate on.
655 */
656TRPMR3DECL(int) TRPMR3Term(PVM pVM)
657{
658 NOREF(pVM);
659 return 0;
660}
661
662
663/**
664 * The VM is being reset.
665 *
666 * For the TRPM component this means that any IDT write monitors
667 * needs to be removed, any pending trap cleared, and the IDT reset.
668 *
669 * @param pVM VM handle.
670 */
671TRPMR3DECL(void) TRPMR3Reset(PVM pVM)
672{
673 /*
674 * Deregister any virtual handlers.
675 */
676#ifdef TRPM_TRACK_GUEST_IDT_CHANGES
677 if (pVM->trpm.s.GuestIdtr.pIdt != ~0U)
678 {
679 int rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GuestIdtr.pIdt);
680 AssertRC(rc);
681 pVM->trpm.s.GuestIdtr.pIdt = ~0U;
682 }
683 pVM->trpm.s.GuestIdtr.cbIdt = 0;
684#endif
685
686 /*
687 * Reinitialize other members calling the relocator to get things right.
688 */
689 pVM->trpm.s.uActiveVector = ~0;
690 memcpy(&pVM->trpm.s.aIdt[0], &g_aIdt[0], sizeof(pVM->trpm.s.aIdt));
691 memset(pVM->trpm.s.aGuestTrapHandler, 0, sizeof(pVM->trpm.s.aGuestTrapHandler));
692 TRPMR3Relocate(pVM, 0);
693
694 /*
695 * Default action when entering raw mode for the first time
696 */
697 VM_FF_SET(pVM, VM_FF_TRPM_SYNC_IDT);
698}
699
700
701/**
702 * Execute state save operation.
703 *
704 * @returns VBox status code.
705 * @param pVM VM Handle.
706 * @param pSSM SSM operation handle.
707 */
708static DECLCALLBACK(int) trpmR3Save(PVM pVM, PSSMHANDLE pSSM)
709{
710 LogFlow(("trpmR3Save:\n"));
711
712 /*
713 * Active and saved traps.
714 */
715 PTRPM pTrpm = &pVM->trpm.s;
716 SSMR3PutUInt(pSSM, pTrpm->uActiveVector);
717 SSMR3PutUInt(pSSM, pTrpm->fActiveSoftwareInterrupt);
718 SSMR3PutGCUInt(pSSM, pTrpm->uActiveErrorCode);
719 SSMR3PutGCUIntPtr(pSSM, pTrpm->uActiveCR2);
720 SSMR3PutGCUInt(pSSM, pTrpm->uSavedVector);
721 SSMR3PutUInt(pSSM, pTrpm->fSavedSoftwareInterrupt);
722 SSMR3PutGCUInt(pSSM, pTrpm->uSavedErrorCode);
723 SSMR3PutGCUIntPtr(pSSM, pTrpm->uSavedCR2);
724 SSMR3PutGCUInt(pSSM, pTrpm->uPrevVector);
725 SSMR3PutGCUInt(pSSM, pTrpm->fDisableMonitoring);
726 SSMR3PutUInt(pSSM, VM_FF_ISSET(pVM, VM_FF_TRPM_SYNC_IDT));
727 SSMR3PutMem(pSSM, &pTrpm->au32IdtPatched[0], sizeof(pTrpm->au32IdtPatched));
728 SSMR3PutU32(pSSM, ~0); /* separator. */
729
730 /*
731 * Save any trampoline gates.
732 */
733 for (uint32_t iTrap = 0; iTrap < ELEMENTS(pTrpm->aGuestTrapHandler); iTrap++)
734 {
735 if (pTrpm->aGuestTrapHandler[iTrap])
736 {
737 SSMR3PutU32(pSSM, iTrap);
738 SSMR3PutGCPtr(pSSM, pTrpm->aGuestTrapHandler[iTrap]);
739 SSMR3PutMem(pSSM, &pTrpm->aIdt[iTrap], sizeof(pTrpm->aIdt[iTrap]));
740 }
741 }
742
743 return SSMR3PutU32(pSSM, ~0); /* terminator */
744}
745
746
747/**
748 * Execute state load operation.
749 *
750 * @returns VBox status code.
751 * @param pVM VM Handle.
752 * @param pSSM SSM operation handle.
753 * @param u32Version Data layout version.
754 */
755static DECLCALLBACK(int) trpmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version)
756{
757 LogFlow(("trpmR3Load:\n"));
758
759 /*
760 * Validate version.
761 */
762 if (u32Version != TRPM_SAVED_STATE_VERSION)
763 {
764 Log(("trpmR3Load: Invalid version u32Version=%d!\n", u32Version));
765 return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
766 }
767
768 /*
769 * Call the reset function to kick out any handled gates and other potential trouble.
770 */
771 TRPMR3Reset(pVM);
772
773 /*
774 * Active and saved traps.
775 */
776 PTRPM pTrpm = &pVM->trpm.s;
777 SSMR3GetUInt(pSSM, &pTrpm->uActiveVector);
778 SSMR3GetUInt(pSSM, &pTrpm->fActiveSoftwareInterrupt);
779 SSMR3GetGCUInt(pSSM, &pTrpm->uActiveErrorCode);
780 SSMR3GetGCUIntPtr(pSSM, &pTrpm->uActiveCR2);
781 SSMR3GetGCUInt(pSSM, &pTrpm->uSavedVector);
782 SSMR3GetUInt(pSSM, &pTrpm->fSavedSoftwareInterrupt);
783 SSMR3GetGCUInt(pSSM, &pTrpm->uSavedErrorCode);
784 SSMR3GetGCUIntPtr(pSSM, &pTrpm->uSavedCR2);
785 SSMR3GetGCUInt(pSSM, &pTrpm->uPrevVector);
786 SSMR3GetGCUInt(pSSM, &pTrpm->fDisableMonitoring);
787
788 RTUINT fSyncIDT;
789 int rc = SSMR3GetUInt(pSSM, &fSyncIDT);
790 if (VBOX_FAILURE(rc))
791 return rc;
792 if (fSyncIDT & ~1)
793 {
794 AssertMsgFailed(("fSyncIDT=%#x\n", fSyncIDT));
795 return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
796 }
797 if (fSyncIDT)
798 VM_FF_SET(pVM, VM_FF_TRPM_SYNC_IDT);
799 /* else: cleared by reset call above. */
800
801 SSMR3GetMem(pSSM, &pTrpm->au32IdtPatched[0], sizeof(pTrpm->au32IdtPatched));
802
803 /* check the separator */
804 uint32_t u32Sep;
805 rc = SSMR3GetU32(pSSM, &u32Sep);
806 if (VBOX_FAILURE(rc))
807 return rc;
808 if (u32Sep != (uint32_t)~0)
809 {
810 AssertMsgFailed(("u32Sep=%#x (first)\n", u32Sep));
811 return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
812 }
813
814 /*
815 * Restore any trampoline gates.
816 */
817 for (;;)
818 {
819 /* gate number / terminator */
820 uint32_t iTrap;
821 rc = SSMR3GetU32(pSSM, &iTrap);
822 if (VBOX_FAILURE(rc))
823 return rc;
824 if (iTrap == (uint32_t)~0)
825 break;
826 if ( iTrap >= ELEMENTS(pTrpm->aIdt)
827 || pTrpm->aGuestTrapHandler[iTrap])
828 {
829 AssertMsgFailed(("iTrap=%#x\n", iTrap));
830 return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
831 }
832
833 /* restore the IDT entry. */
834 RTGCPTR GCPtrHandler;
835 SSMR3GetGCPtr(pSSM, &GCPtrHandler);
836 VBOXIDTE Idte;
837 rc = SSMR3GetMem(pSSM, &Idte, sizeof(Idte));
838 if (VBOX_FAILURE(rc))
839 return rc;
840 Assert(GCPtrHandler);
841 pTrpm->aIdt[iTrap] = Idte;
842 }
843
844 return VINF_SUCCESS;
845}
846
847
848/**
849 * Check if gate handlers were updated
850 * (callback for the VM_FF_TRPM_SYNC_IDT forced action).
851 *
852 * @returns VBox status code.
853 * @param pVM The VM handle.
854 */
855TRPMR3DECL(int) TRPMR3SyncIDT(PVM pVM)
856{
857 STAM_PROFILE_START(&pVM->trpm.s.StatSyncIDT, a);
858 const bool fRawRing0 = EMIsRawRing0Enabled(pVM);
859 int rc;
860
861 if (pVM->trpm.s.fDisableMonitoring)
862 {
863 VM_FF_CLEAR(pVM, VM_FF_TRPM_SYNC_IDT);
864 return VINF_SUCCESS; /* Nothing to do */
865 }
866
867 if (fRawRing0 && CSAMIsEnabled(pVM))
868 {
869 /* Clear all handlers */
870 /** @todo inefficient, but simple */
871 for (unsigned iGate=0;iGate<256;iGate++)
872 TRPMR3SetGuestTrapHandler(pVM, iGate, TRPM_INVALID_HANDLER);
873
874 /* Scan them all (only the first time) */
875 CSAMR3CheckGates(pVM, 0, 256);
876 }
877
878 /*
879 * Get the IDTR.
880 */
881 VBOXIDTR IDTR;
882 IDTR.pIdt = CPUMGetGuestIDTR(pVM, &IDTR.cbIdt);
883 if (!IDTR.cbIdt)
884 {
885 Log(("No IDT entries...\n"));
886 return DBGFSTOP(pVM);
887 }
888
889#ifdef TRPM_TRACK_GUEST_IDT_CHANGES
890 /*
891 * Check if Guest's IDTR has changed.
892 */
893 if ( IDTR.pIdt != pVM->trpm.s.GuestIdtr.pIdt
894 || IDTR.cbIdt != pVM->trpm.s.GuestIdtr.cbIdt)
895 {
896 Log(("TRPMR3UpdateFromCPUM: Guest's IDT is changed to pIdt=%08X cbIdt=%08X\n", IDTR.pIdt, IDTR.cbIdt));
897
898 /*
899 * [Re]Register write virtual handler for guest's IDT.
900 */
901 if (pVM->trpm.s.GuestIdtr.pIdt != ~0U)
902 {
903 rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GuestIdtr.pIdt);
904 AssertRCReturn(rc, rc);
905 }
906 /* limit is including */
907 rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_WRITE, IDTR.pIdt, IDTR.pIdt + IDTR.cbIdt /* already inclusive */,
908 0, trpmGuestIDTWriteHandler, "trpmgcGuestIDTWriteHandler", 0, "Guest IDT write access handler");
909 AssertRCReturn(rc, rc);
910
911 /* Update saved Guest IDTR. */
912 pVM->trpm.s.GuestIdtr = IDTR;
913 }
914#endif
915
916 /*
917 * Sync the interrupt gate.
918 * Should probably check/sync the others too, but for now we'll handle that in #GP.
919 */
920 X86DESC Idte3;
921 rc = PGMPhysReadGCPtr(pVM, &Idte3, IDTR.pIdt + sizeof(Idte3) * 3, sizeof(Idte3));
922 if (VBOX_FAILURE(rc))
923 {
924 AssertMsgRC(rc, ("Failed to read IDT[3]! rc=%Vrc\n", rc));
925 return DBGFSTOP(pVM);
926 }
927 AssertRCReturn(rc, rc);
928 if (fRawRing0)
929 pVM->trpm.s.aIdt[3].Gen.u2DPL = RT_MAX(Idte3.Gen.u2Dpl, 1);
930 else
931 pVM->trpm.s.aIdt[3].Gen.u2DPL = Idte3.Gen.u2Dpl;
932
933 /*
934 * Clear the FF and we're done.
935 */
936 VM_FF_CLEAR(pVM, VM_FF_TRPM_SYNC_IDT);
937 STAM_PROFILE_STOP(&pVM->trpm.s.StatSyncIDT, a);
938 return VINF_SUCCESS;
939}
940
941
942/**
943 * Disable IDT monitoring and syncing
944 *
945 * @param pVM The VM to operate on.
946 */
947TRPMR3DECL(void) TRPMR3DisableMonitoring(PVM pVM)
948{
949 /*
950 * Deregister any virtual handlers.
951 */
952#ifdef TRPM_TRACK_GUEST_IDT_CHANGES
953 if (pVM->trpm.s.GuestIdtr.pIdt != ~0U)
954 {
955 int rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GuestIdtr.pIdt);
956 AssertRC(rc);
957 pVM->trpm.s.GuestIdtr.pIdt = ~0U;
958 }
959 pVM->trpm.s.GuestIdtr.cbIdt = 0;
960#endif
961
962#ifdef TRPM_TRACK_SHADOW_IDT_CHANGES
963 if (pVM->trpm.s.GCPtrIdt != ~0U)
964 {
965 int rc = PGMHandlerVirtualDeregister(pVM, pVM->trpm.s.GCPtrIdt);
966 AssertRC(rc);
967 pVM->trpm.s.GCPtrIdt = ~0U;
968 }
969#endif
970
971 VM_FF_CLEAR(pVM, VM_FF_TRPM_SYNC_IDT);
972
973 pVM->trpm.s.fDisableMonitoring = true;
974}
975
976
977/**
978 * \#PF Handler callback for virtual access handler ranges.
979 *
980 * Important to realize that a physical page in a range can have aliases, and
981 * for ALL and WRITE handlers these will also trigger.
982 *
983 * @returns VINF_SUCCESS if the handler have carried out the operation.
984 * @returns VINF_PGM_HANDLER_DO_DEFAULT if the caller should carry out the access operation.
985 * @param pVM VM Handle.
986 * @param GCPtr The virtual address the guest is writing to. (not correct if it's an alias!)
987 * @param pvPtr The HC mapping of that address.
988 * @param pvBuf What the guest is reading/writing.
989 * @param cbBuf How much it's reading/writing.
990 * @param enmAccessType The access type.
991 * @param pvUser User argument.
992 */
993static DECLCALLBACK(int) trpmGuestIDTWriteHandler(PVM pVM, RTGCPTR GCPtr, void *pvPtr, void *pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser)
994{
995 Assert(enmAccessType == PGMACCESSTYPE_WRITE);
996 Log(("trpmGuestIDTWriteHandler: write to %VGv size %d\n", GCPtr, cbBuf));
997 VM_FF_SET(pVM, VM_FF_TRPM_SYNC_IDT);
998 return VINF_PGM_HANDLER_DO_DEFAULT;
999}
1000
1001
1002/**
1003 * Clear passthrough interrupt gate handler (reset to default handler)
1004 *
1005 * @returns VBox status code.
1006 * @param pVM The VM to operate on.
1007 * @param iTrap Trap/interrupt gate number.
1008 */
1009TRPMR3DECL(int) trpmR3ClearPassThroughHandler(PVM pVM, unsigned iTrap)
1010{
1011 /** @todo cleanup trpmR3ClearPassThroughHandler()! */
1012 RTGCPTR aGCPtrs[TRPM_HANDLER_MAX];
1013 int rc;
1014
1015 memset(aGCPtrs, 0, sizeof(aGCPtrs));
1016
1017 rc = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, "TRPMGCHandlerInterupt", &aGCPtrs[TRPM_HANDLER_INT]);
1018 AssertReleaseMsgRC(rc, ("Couldn't find TRPMGCHandlerInterupt in VMMGC.gc!\n"));
1019
1020 if ( iTrap < TRPM_HANDLER_INT_BASE
1021 || iTrap >= ELEMENTS(pVM->trpm.s.aIdt))
1022 {
1023 AssertMsg(iTrap < TRPM_HANDLER_INT_BASE, ("Illegal gate number %#x!\n", iTrap));
1024 return VERR_INVALID_PARAMETER;
1025 }
1026 memcpy(&pVM->trpm.s.aIdt[iTrap], &g_aIdt[iTrap], sizeof(pVM->trpm.s.aIdt[0]));
1027
1028 /* Unmark it for relocation purposes. */
1029 ASMBitClear(&pVM->trpm.s.au32IdtPatched[0], iTrap);
1030
1031 RTSEL SelCS = CPUMGetHyperCS(pVM);
1032 PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
1033 PVBOXIDTE_GENERIC pIdteTemplate = &g_aIdt[iTrap];
1034 if (pIdte->Gen.u1Present)
1035 {
1036 Assert(pIdteTemplate->u16OffsetLow == TRPM_HANDLER_INT);
1037 Assert(sizeof(RTGCPTR) <= sizeof(aGCPtrs[0]));
1038 RTGCPTR Offset = (RTGCPTR)aGCPtrs[pIdteTemplate->u16OffsetLow];
1039
1040 /*
1041 * Generic handlers have different entrypoints for each possible
1042 * vector number. These entrypoints make a sort of an array with
1043 * 8 byte entries where the vector number is the index.
1044 * See TRPMGCHandlersA.asm for details.
1045 */
1046 Offset += iTrap * 8;
1047
1048 if (pIdte->Gen.u5Type2 != VBOX_IDTE_TYPE2_TASK)
1049 {
1050 pIdte->Gen.u16OffsetLow = Offset & 0xffff;
1051 pIdte->Gen.u16OffsetHigh = Offset >> 16;
1052 pIdte->Gen.u16SegSel = SelCS;
1053 }
1054 }
1055
1056 return VINF_SUCCESS;
1057}
1058
1059
1060/**
1061 * Check if address is a gate handler (interrupt or trap).
1062 *
1063 * @returns gate nr or ~0 is not found
1064 *
1065 * @param pVM VM handle.
1066 * @param GCPtr GC address to check.
1067 */
1068TRPMR3DECL(uint32_t) TRPMR3QueryGateByHandler(PVM pVM, RTGCPTR GCPtr)
1069{
1070 for (uint32_t iTrap = 0; iTrap < ELEMENTS(pVM->trpm.s.aGuestTrapHandler); iTrap++)
1071 {
1072 if (pVM->trpm.s.aGuestTrapHandler[iTrap] == GCPtr)
1073 return iTrap;
1074
1075 /* redundant */
1076 if (ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], iTrap))
1077 {
1078 PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
1079 RTGCPTR pHandler = (pIdte->Gen.u16OffsetHigh << 16) | pIdte->Gen.u16OffsetLow;
1080
1081 if (pHandler == GCPtr)
1082 return iTrap;
1083 }
1084 }
1085 return ~0;
1086}
1087
1088
1089/**
1090 * Get guest trap/interrupt gate handler
1091 *
1092 * @returns Guest trap handler address or TRPM_INVALID_HANDLER if none installed
1093 * @param pVM The VM to operate on.
1094 * @param iTrap Interrupt/trap number.
1095 */
1096TRPMR3DECL(RTGCPTR) TRPMR3GetGuestTrapHandler(PVM pVM, unsigned iTrap)
1097{
1098 AssertReturn(iTrap < ELEMENTS(pVM->trpm.s.aIdt), TRPM_INVALID_HANDLER);
1099
1100 return pVM->trpm.s.aGuestTrapHandler[iTrap];
1101}
1102
1103
1104/**
1105 * Set guest trap/interrupt gate handler
1106 * Used for setting up trap gates used for kernel calls.
1107 *
1108 * @returns VBox status code.
1109 * @param pVM The VM to operate on.
1110 * @param iTrap Interrupt/trap number.
1111 * @param pHandler GC handler pointer
1112 */
1113TRPMR3DECL(int) TRPMR3SetGuestTrapHandler(PVM pVM, unsigned iTrap, RTGCPTR pHandler)
1114{
1115 /*
1116 * Validate.
1117 */
1118 if (iTrap >= ELEMENTS(pVM->trpm.s.aIdt))
1119 {
1120 AssertMsg(iTrap < TRPM_HANDLER_INT_BASE, ("Illegal gate number %d!\n", iTrap));
1121 return VERR_INVALID_PARAMETER;
1122 }
1123
1124 AssertReturn(pHandler == TRPM_INVALID_HANDLER || PATMIsPatchGCAddr(pVM, pHandler), VERR_INVALID_PARAMETER);
1125
1126 uint16_t cbIDT;
1127 RTGCPTR GCPtrIDT = CPUMGetGuestIDTR(pVM, &cbIDT);
1128 if (iTrap * sizeof(VBOXIDTE) >= cbIDT)
1129 return VERR_INVALID_PARAMETER; /* Silently ignore out of range requests. */
1130
1131 if (pHandler == TRPM_INVALID_HANDLER)
1132 {
1133 /* clear trap handler */
1134 Log(("TRPMR3SetGuestTrapHandler: clear handler %x\n", iTrap));
1135
1136 if (ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], iTrap))
1137 trpmR3ClearPassThroughHandler(pVM, iTrap);
1138
1139 pVM->trpm.s.aGuestTrapHandler[iTrap] = TRPM_INVALID_HANDLER;
1140 return VINF_SUCCESS;
1141 }
1142
1143 /*
1144 * Read the guest IDT entry.
1145 */
1146 VBOXIDTE GuestIdte;
1147 int rc = PGMPhysReadGCPtr(pVM, &GuestIdte, GCPtrIDT + iTrap * sizeof(GuestIdte), sizeof(GuestIdte));
1148 if (VBOX_FAILURE(rc))
1149 {
1150 AssertMsgRC(rc, ("Failed to read IDTE! rc=%Vrc\n", rc));
1151 return rc;
1152 }
1153
1154 if (EMIsRawRing0Enabled(pVM))
1155 {
1156 /*
1157 * Only replace the 0x2E handler; others need to be called indirectly via a trampoline in our GC handlers
1158 */
1159 /** @note dependencies on trap gate numbers in SELMR3SyncTSS */
1160 /** @todo handle those dependencies better! */
1161# ifdef _WIN32 /** @todo Solve this in a proper manner. see defect #1186 */
1162 if (iTrap == 0x2E || iTrap == 0x80)
1163# else
1164 if (iTrap == 0x80)
1165# endif
1166 {
1167 if ( GuestIdte.Gen.u1Present
1168 && ( GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_TRAP_32
1169 || GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32)
1170 && GuestIdte.Gen.u2DPL == 3)
1171 {
1172 PVBOXIDTE pIdte = &pVM->trpm.s.aIdt[iTrap];
1173
1174 GuestIdte.Gen.u5Type2 = VBOX_IDTE_TYPE2_TRAP_32;
1175 GuestIdte.Gen.u16OffsetHigh = pHandler >> 16;
1176 GuestIdte.Gen.u16OffsetLow = pHandler & 0xFFFF;
1177 GuestIdte.Gen.u16SegSel |= 1; //ring 1
1178 *pIdte = GuestIdte;
1179
1180 /* Mark it for relocation purposes. */
1181 ASMBitSet(&pVM->trpm.s.au32IdtPatched[0], iTrap);
1182
1183 /* Also store it in our guest trap array. */
1184 pVM->trpm.s.aGuestTrapHandler[iTrap] = pHandler;
1185
1186 Log(("Setting trap handler %x to %08X (direct)\n", iTrap, pHandler));
1187 return VINF_SUCCESS;
1188 }
1189 /* ok, let's try to install a trampoline handler then. */
1190 }
1191 }
1192
1193 if ( GuestIdte.Gen.u1Present
1194 && ( GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_TRAP_32
1195 || GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32)
1196 && (GuestIdte.Gen.u2DPL == 3 || GuestIdte.Gen.u2DPL == 0))
1197 {
1198 /*
1199 * Save handler which can be used for a trampoline call inside the GC
1200 */
1201 Log(("Setting trap handler %x to %08X\n", iTrap, pHandler));
1202 pVM->trpm.s.aGuestTrapHandler[iTrap] = pHandler;
1203 return VINF_SUCCESS;
1204 }
1205 return VERR_INVALID_PARAMETER;
1206}
1207
1208
1209/**
1210 * Check if address is a gate handler (interrupt/trap/task/anything).
1211 *
1212 * @returns True is gate handler, false if not.
1213 *
1214 * @param pVM VM handle.
1215 * @param GCPtr GC address to check.
1216 */
1217TRPMR3DECL(bool) TRPMR3IsGateHandler(PVM pVM, RTGCPTR GCPtr)
1218{
1219 /*
1220 * Read IDTR and calc last entry.
1221 */
1222 uint16_t cbIDT;
1223 RTGCPTR GCPtrIDTE = CPUMGetGuestIDTR(pVM, &cbIDT);
1224 unsigned cEntries = (cbIDT + 1) / sizeof(VBOXIDTE);
1225 if (!cEntries)
1226 return false;
1227 RTGCPTR GCPtrIDTELast = GCPtrIDTE + (cEntries - 1) * sizeof(VBOXIDTE);
1228
1229 /*
1230 * Outer loop: interate pages.
1231 */
1232 while (GCPtrIDTE <= GCPtrIDTELast)
1233 {
1234 /*
1235 * Convert this page to a HC address.
1236 * (This function checks for not-present pages.)
1237 */
1238 PVBOXIDTE pIDTE;
1239 int rc = PGMPhysGCPtr2HCPtr(pVM, GCPtrIDTE, (void **)&pIDTE);
1240 if (VBOX_SUCCESS(rc))
1241 {
1242 /*
1243 * Inner Loop: Iterate the data on this page looking for an entry equal to GCPtr.
1244 * N.B. Member of the Flat Earth Society...
1245 */
1246 while (GCPtrIDTE <= GCPtrIDTELast)
1247 {
1248 if (pIDTE->Gen.u1Present)
1249 {
1250 RTGCPTR GCPtrHandler = (pIDTE->Gen.u16OffsetHigh << 16) | pIDTE->Gen.u16OffsetLow;
1251 if (GCPtr == GCPtrHandler)
1252 return true;
1253 }
1254
1255 /* next entry */
1256 if ((GCPtrIDTE & PAGE_OFFSET_MASK) + sizeof(VBOXIDTE) >= PAGE_SIZE)
1257 {
1258 AssertMsg(!(GCPtrIDTE & (sizeof(VBOXIDTE) - 1)),
1259 ("IDT is crossing pages and it's not aligned! GCPtrIDTE=%#x cbIDT=%#x\n", GCPtrIDTE, cbIDT));
1260 GCPtrIDTE += sizeof(VBOXIDTE);
1261 break;
1262 }
1263 GCPtrIDTE += sizeof(VBOXIDTE);
1264 pIDTE++;
1265 }
1266 }
1267 else
1268 {
1269 /* Skip to the next page (if any). Take care not to wrap around the address space. */
1270 if ((GCPtrIDTELast >> PAGE_SHIFT) == (GCPtrIDTE >> PAGE_SHIFT))
1271 return false;
1272 GCPtrIDTE = RT_ALIGN_T(GCPtrIDTE, PAGE_SIZE, RTGCPTR) + PAGE_SIZE + (GCPtrIDTE & (sizeof(VBOXIDTE) - 1));
1273 }
1274 }
1275 return false;
1276}
1277
1278
1279/**
1280 * Inject event (such as external irq or trap)
1281 *
1282 * @returns VBox status code.
1283 * @param pVM The VM to operate on.
1284 * @param enmEvent Trpm event type
1285 */
1286TRPMR3DECL(int) TRPMR3InjectEvent(PVM pVM, TRPMEVENT enmEvent)
1287{
1288 PCPUMCTX pCtx;
1289 int rc;
1290
1291 rc = CPUMQueryGuestCtxPtr(pVM, &pCtx);
1292 AssertRC(rc);
1293 Assert(!PATMIsPatchGCAddr(pVM, (RTGCPTR)pCtx->eip));
1294 Assert(!VM_FF_ISSET(pVM, VM_FF_INHIBIT_INTERRUPTS));
1295
1296 /* Currently only useful for external hardware interrupts. */
1297 Assert(enmEvent == TRPM_HARDWARE_INT);
1298
1299 if (REMR3QueryPendingInterrupt(pVM) == REM_NO_PENDING_IRQ)
1300 {
1301#ifdef TRPM_FORWARD_TRAPS_IN_GC
1302
1303# ifdef LOG_ENABLED
1304 DBGFR3InfoLog(pVM, "cpumguest", "TRPMInject");
1305 DBGFR3DisasInstrCurrentLog(pVM, "TRPMInject");
1306# endif
1307
1308 uint8_t u8Interrupt;
1309 rc = PDMGetInterrupt(pVM, &u8Interrupt);
1310 Log(("TRPMR3InjectEvent: u8Interrupt=%d (%#x) rc=%Vrc\n", u8Interrupt, u8Interrupt, rc));
1311 if (VBOX_SUCCESS(rc))
1312 {
1313 if (HWACCMR3IsActive(pVM))
1314 {
1315 rc = TRPMAssertTrap(pVM, u8Interrupt, false);
1316 AssertRC(rc);
1317 STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1318 return VINF_EM_RESCHEDULE_HWACC;
1319 }
1320 /* If the guest gate is not patched, then we will check (again) if we can patch it. */
1321 if (pVM->trpm.s.aGuestTrapHandler[u8Interrupt] == TRPM_INVALID_HANDLER)
1322 {
1323 CSAMR3CheckGates(pVM, u8Interrupt, 1);
1324 Log(("TRPMR3InjectEvent: recheck gate %x -> valid=%d\n", u8Interrupt, TRPMR3GetGuestTrapHandler(pVM, u8Interrupt) != TRPM_INVALID_HANDLER));
1325 }
1326
1327 if (pVM->trpm.s.aGuestTrapHandler[u8Interrupt] != TRPM_INVALID_HANDLER)
1328 {
1329 /* There's a handler -> let's execute it in raw mode */
1330 rc = TRPMForwardTrap(pVM, CPUMCTX2CORE(pCtx), u8Interrupt, 0, TRPM_TRAP_NO_ERRORCODE, enmEvent);
1331 if (rc == VINF_SUCCESS /* Don't use VBOX_SUCCESS */)
1332 {
1333 STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1334 return VINF_EM_RESCHEDULE_RAW;
1335 }
1336 }
1337 else
1338 STAM_COUNTER_INC(&pVM->trpm.s.StatForwardFailNoHandler);
1339 REMR3NotifyPendingInterrupt(pVM, u8Interrupt);
1340 }
1341 else
1342 AssertRC(rc);
1343#else
1344 if (HWACCMR3IsActive(pVM))
1345 {
1346 uint8_t u8Interrupt;
1347 rc = PDMGetInterrupt(pVM, &u8Interrupt);
1348 Log(("TRPMR3InjectEvent: u8Interrupt=%d (%#x) rc=%Vrc\n", u8Interrupt, u8Interrupt, rc));
1349 if (VBOX_SUCCESS(rc))
1350 {
1351 rc = TRPMAssertTrap(pVM, u8Interrupt, false);
1352 AssertRC(rc);
1353 STAM_COUNTER_INC(&pVM->trpm.s.paStatForwardedIRQR3[u8Interrupt]);
1354 return VINF_EM_RESCHEDULE_HWACC;
1355 }
1356 }
1357 else
1358 AssertRC(rc);
1359#endif
1360 }
1361 /** @todo check if it's safe to translate the patch address to the original guest address.
1362 * this implies a safe state in translated instructions and should take sti successors into account (instruction fusing)
1363 */
1364 /* Note: if it's a PATM address, then we'll go back to raw mode regardless of the return code below. */
1365
1366 /* Fall back to the recompiler */
1367 return VINF_EM_RESCHEDULE_REM; /* (Heed the halted state if this is changed!) */
1368}
1369
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