VirtualBox

source: vbox/trunk/src/VBox/HostDrivers/Support/SUPDrvInternal.h@ 37219

Last change on this file since 37219 was 36191, checked in by vboxsync, 14 years ago

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1/* $Revision: 36191 $ */
2/** @file
3 * VirtualBox Support Driver - Internal header.
4 */
5
6/*
7 * Copyright (C) 2006-2007 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * The contents of this file may alternatively be used under the terms
18 * of the Common Development and Distribution License Version 1.0
19 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20 * VirtualBox OSE distribution, in which case the provisions of the
21 * CDDL are applicable instead of those of the GPL.
22 *
23 * You may elect to license modified versions of this file under the
24 * terms and conditions of either the GPL or the CDDL or both.
25 */
26
27#ifndef ___SUPDrvInternal_h
28#define ___SUPDrvInternal_h
29
30
31/*******************************************************************************
32* Header Files *
33*******************************************************************************/
34#include <VBox/cdefs.h>
35#include <VBox/types.h>
36#include <iprt/assert.h>
37#include <VBox/sup.h>
38#include <iprt/memobj.h>
39#include <iprt/time.h>
40#include <iprt/timer.h>
41#include <iprt/string.h>
42#include <iprt/err.h>
43
44#ifdef SUPDRV_AGNOSTIC
45/* do nothing */
46
47#elif defined(RT_OS_WINDOWS)
48 RT_C_DECLS_BEGIN
49# if (_MSC_VER >= 1400) && !defined(VBOX_WITH_PATCHED_DDK)
50# define _InterlockedExchange _InterlockedExchange_StupidDDKVsCompilerCrap
51# define _InterlockedExchangeAdd _InterlockedExchangeAdd_StupidDDKVsCompilerCrap
52# define _InterlockedCompareExchange _InterlockedCompareExchange_StupidDDKVsCompilerCrap
53# define _InterlockedAddLargeStatistic _InterlockedAddLargeStatistic_StupidDDKVsCompilerCrap
54# define _interlockedbittestandset _interlockedbittestandset_StupidDDKVsCompilerCrap
55# define _interlockedbittestandreset _interlockedbittestandreset_StupidDDKVsCompilerCrap
56# define _interlockedbittestandset64 _interlockedbittestandset64_StupidDDKVsCompilerCrap
57# define _interlockedbittestandreset64 _interlockedbittestandreset64_StupidDDKVsCompilerCrap
58# pragma warning(disable : 4163)
59# include <ntddk.h>
60# pragma warning(default : 4163)
61# undef _InterlockedExchange
62# undef _InterlockedExchangeAdd
63# undef _InterlockedCompareExchange
64# undef _InterlockedAddLargeStatistic
65# undef _interlockedbittestandset
66# undef _interlockedbittestandreset
67# undef _interlockedbittestandset64
68# undef _interlockedbittestandreset64
69# else
70# include <ntddk.h>
71# endif
72# include <memory.h>
73# define memcmp(a,b,c) mymemcmp(a,b,c)
74 int VBOXCALL mymemcmp(const void *, const void *, size_t);
75 RT_C_DECLS_END
76
77#elif defined(RT_OS_LINUX)
78# include <linux/version.h>
79# if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33)
80# include <generated/autoconf.h>
81# else
82# ifndef AUTOCONF_INCLUDED
83# include <linux/autoconf.h>
84# endif
85# endif
86# if defined(CONFIG_MODVERSIONS) && !defined(MODVERSIONS)
87# define MODVERSIONS
88# if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 71)
89# include <linux/modversions.h>
90# endif
91# endif
92# if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 0)
93# undef ALIGN
94# endif
95# ifndef KBUILD_STR
96# if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 16)
97# define KBUILD_STR(s) s
98# else
99# define KBUILD_STR(s) #s
100# endif
101# endif
102# include <linux/string.h>
103# include <linux/spinlock.h>
104# include <linux/slab.h>
105# if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
106# include <linux/semaphore.h>
107# else /* older kernels */
108# include <asm/semaphore.h>
109# endif /* older kernels */
110# include <linux/timer.h>
111
112#elif defined(RT_OS_DARWIN)
113# include <libkern/libkern.h>
114# include <iprt/string.h>
115
116#elif defined(RT_OS_OS2)
117
118#elif defined(RT_OS_FREEBSD)
119# define memset libkern_memset /** @todo these are just hacks to get it compiling, check out later. */
120# define memcmp libkern_memcmp
121# define strchr libkern_strchr
122# define strrchr libkern_strrchr
123# define ffsl libkern_ffsl
124# define fls libkern_fls
125# define flsl libkern_flsl
126# include <sys/libkern.h>
127# undef memset
128# undef memcmp
129# undef strchr
130# undef strrchr
131# undef ffs
132# undef ffsl
133# undef fls
134# undef flsl
135# include <iprt/string.h>
136
137#elif defined(RT_OS_SOLARIS)
138# include <sys/cmn_err.h>
139# include <iprt/string.h>
140
141#else
142# error "unsupported OS."
143#endif
144
145#include "SUPDrvIOC.h"
146#include "SUPDrvIDC.h"
147
148
149
150/*******************************************************************************
151* Defined Constants And Macros *
152*******************************************************************************/
153/*
154 * Hardcoded cookies.
155 */
156#define BIRD 0x64726962 /* 'bird' */
157#define BIRD_INV 0x62697264 /* 'drib' */
158
159
160#ifdef RT_OS_WINDOWS
161/** Use a normal mutex for the loader so we remain at the same IRQL after
162 * taking it.
163 * @todo fix the mutex implementation on linux and make this the default. */
164# define SUPDRV_USE_MUTEX_FOR_LDR
165
166/** Use a normal mutex for the GIP so we remain at the same IRQL after
167 * taking it.
168 * @todo fix the mutex implementation on linux and make this the default. */
169# define SUPDRV_USE_MUTEX_FOR_GIP
170#endif
171
172
173/**
174 * OS debug print macro.
175 */
176#define OSDBGPRINT(a) SUPR0Printf a
177
178
179/** @name Context values for the per-session handle tables.
180 * The context value is used to distinguish between the different kinds of
181 * handles, making the handle table API do all the work.
182 * @{ */
183/** Handle context value for single release event handles. */
184#define SUPDRV_HANDLE_CTX_EVENT ((void *)(uintptr_t)(SUPDRVOBJTYPE_SEM_EVENT))
185/** Handle context value for multiple release event handles. */
186#define SUPDRV_HANDLE_CTX_EVENT_MULTI ((void *)(uintptr_t)(SUPDRVOBJTYPE_SEM_EVENT_MULTI))
187/** @} */
188
189
190/**
191 * Validates a session pointer.
192 *
193 * @returns true/false accordingly.
194 * @param pSession The session.
195 */
196#define SUP_IS_SESSION_VALID(pSession) \
197 ( VALID_PTR(pSession) \
198 && pSession->u32Cookie == BIRD_INV)
199
200
201/*******************************************************************************
202* Structures and Typedefs *
203*******************************************************************************/
204/** Pointer to the device extension. */
205typedef struct SUPDRVDEVEXT *PSUPDRVDEVEXT;
206
207
208/**
209 * Memory reference types.
210 */
211typedef enum
212{
213 /** Unused entry */
214 MEMREF_TYPE_UNUSED = 0,
215 /** Locked memory (r3 mapping only). */
216 MEMREF_TYPE_LOCKED,
217 /** Continuous memory block (r3 and r0 mapping). */
218 MEMREF_TYPE_CONT,
219 /** Low memory block (r3 and r0 mapping). */
220 MEMREF_TYPE_LOW,
221 /** Memory block (r3 and r0 mapping). */
222 MEMREF_TYPE_MEM,
223 /** Locked memory (r3 mapping only) allocated by the support driver. */
224 MEMREF_TYPE_PAGE,
225 /** Blow the type up to 32-bit and mark the end. */
226 MEMREF_TYPE_32BIT_HACK = 0x7fffffff
227} SUPDRVMEMREFTYPE, *PSUPDRVMEMREFTYPE;
228
229
230/**
231 * Structure used for tracking memory a session
232 * references in one way or another.
233 */
234typedef struct SUPDRVMEMREF
235{
236 /** The memory object handle. */
237 RTR0MEMOBJ MemObj;
238 /** The ring-3 mapping memory object handle. */
239 RTR0MEMOBJ MapObjR3;
240 /** Type of memory. */
241 SUPDRVMEMREFTYPE eType;
242} SUPDRVMEMREF, *PSUPDRVMEMREF;
243
244
245/**
246 * Bundle of locked memory ranges.
247 */
248typedef struct SUPDRVBUNDLE
249{
250 /** Pointer to the next bundle. */
251 struct SUPDRVBUNDLE * volatile pNext;
252 /** Referenced memory. */
253 SUPDRVMEMREF aMem[64];
254 /** Number of entries used. */
255 uint32_t volatile cUsed;
256} SUPDRVBUNDLE, *PSUPDRVBUNDLE;
257
258
259/**
260 * Loaded image.
261 */
262typedef struct SUPDRVLDRIMAGE
263{
264 /** Next in chain. */
265 struct SUPDRVLDRIMAGE * volatile pNext;
266 /** Pointer to the image. */
267 void *pvImage;
268 /** Pointer to the allocated image buffer.
269 * pvImage is 32-byte aligned or it may governed by the native loader (this
270 * member is NULL then). */
271 void *pvImageAlloc;
272 /** Size of the image including the tables. This is mainly for verification
273 * of the load request. */
274 uint32_t cbImageWithTabs;
275 /** Size of the image. */
276 uint32_t cbImageBits;
277 /** The number of entries in the symbol table. */
278 uint32_t cSymbols;
279 /** Pointer to the symbol table. */
280 PSUPLDRSYM paSymbols;
281 /** The offset of the string table. */
282 char *pachStrTab;
283 /** Size of the string table. */
284 uint32_t cbStrTab;
285 /** Pointer to the optional module initialization callback. */
286 PFNR0MODULEINIT pfnModuleInit;
287 /** Pointer to the optional module termination callback. */
288 PFNR0MODULETERM pfnModuleTerm;
289 /** Service request handler. This is NULL for non-service modules. */
290 PFNSUPR0SERVICEREQHANDLER pfnServiceReqHandler;
291 /** The ldr image state. (IOCtl code of last operation.) */
292 uint32_t uState;
293 /** Usage count. */
294 uint32_t volatile cUsage;
295#ifdef RT_OS_WINDOWS
296 /** The section object for the loaded image (fNative=true). */
297 void *pvNtSectionObj;
298 /** Lock object. */
299 RTR0MEMOBJ hMemLock;
300#endif
301 /** Whether it's loaded by the native loader or not. */
302 bool fNative;
303 /** Image name. */
304 char szName[32];
305} SUPDRVLDRIMAGE, *PSUPDRVLDRIMAGE;
306
307
308/** Image usage record. */
309typedef struct SUPDRVLDRUSAGE
310{
311 /** Next in chain. */
312 struct SUPDRVLDRUSAGE * volatile pNext;
313 /** The image. */
314 PSUPDRVLDRIMAGE pImage;
315 /** Load count. */
316 uint32_t volatile cUsage;
317} SUPDRVLDRUSAGE, *PSUPDRVLDRUSAGE;
318
319
320/**
321 * Component factory registration record.
322 */
323typedef struct SUPDRVFACTORYREG
324{
325 /** Pointer to the next registration. */
326 struct SUPDRVFACTORYREG *pNext;
327 /** Pointer to the registered factory. */
328 PCSUPDRVFACTORY pFactory;
329 /** The session owning the factory.
330 * Used for deregistration and session cleanup. */
331 PSUPDRVSESSION pSession;
332 /** Length of the name. */
333 size_t cchName;
334} SUPDRVFACTORYREG;
335/** Pointer to a component factory registration record. */
336typedef SUPDRVFACTORYREG *PSUPDRVFACTORYREG;
337/** Pointer to a const component factory registration record. */
338typedef SUPDRVFACTORYREG const *PCSUPDRVFACTORYREG;
339
340
341/**
342 * Registered object.
343 * This takes care of reference counting and tracking data for access checks.
344 */
345typedef struct SUPDRVOBJ
346{
347 /** Magic value (SUPDRVOBJ_MAGIC). */
348 uint32_t u32Magic;
349 /** The object type. */
350 SUPDRVOBJTYPE enmType;
351 /** Pointer to the next in the global list. */
352 struct SUPDRVOBJ * volatile pNext;
353 /** Pointer to the object destructor.
354 * This may be set to NULL if the image containing the destructor get unloaded. */
355 PFNSUPDRVDESTRUCTOR pfnDestructor;
356 /** User argument 1. */
357 void *pvUser1;
358 /** User argument 2. */
359 void *pvUser2;
360 /** The total sum of all per-session usage. */
361 uint32_t volatile cUsage;
362 /** The creator user id. */
363 RTUID CreatorUid;
364 /** The creator group id. */
365 RTGID CreatorGid;
366 /** The creator process id. */
367 RTPROCESS CreatorProcess;
368} SUPDRVOBJ, *PSUPDRVOBJ;
369
370/** Magic number for SUPDRVOBJ::u32Magic. (Dame Agatha Mary Clarissa Christie). */
371#define SUPDRVOBJ_MAGIC 0x18900915
372/** Dead number magic for SUPDRVOBJ::u32Magic. */
373#define SUPDRVOBJ_MAGIC_DEAD 0x19760112
374
375/**
376 * The per-session object usage record.
377 */
378typedef struct SUPDRVUSAGE
379{
380 /** Pointer to the next in the list. */
381 struct SUPDRVUSAGE * volatile pNext;
382 /** Pointer to the object we're recording usage for. */
383 PSUPDRVOBJ pObj;
384 /** The usage count. */
385 uint32_t volatile cUsage;
386} SUPDRVUSAGE, *PSUPDRVUSAGE;
387
388
389/**
390 * Per session data.
391 * This is mainly for memory tracking.
392 */
393typedef struct SUPDRVSESSION
394{
395 /** Pointer to the device extension. */
396 PSUPDRVDEVEXT pDevExt;
397 /** Session Cookie. */
398 uint32_t u32Cookie;
399
400 /** The VM associated with the session. */
401 PVM pVM;
402 /** Handle table for IPRT semaphore wrapper APIs.
403 * Programmable from R0 and R3. */
404 RTHANDLETABLE hHandleTable;
405 /** Load usage records. (protected by SUPDRVDEVEXT::mtxLdr) */
406 PSUPDRVLDRUSAGE volatile pLdrUsage;
407
408 /** Spinlock protecting the bundles and the GIP members. */
409 RTSPINLOCK Spinlock;
410 /** The ring-3 mapping of the GIP (readonly). */
411 RTR0MEMOBJ GipMapObjR3;
412 /** Set if the session is using the GIP. */
413 uint32_t fGipReferenced;
414 /** Bundle of locked memory objects. */
415 SUPDRVBUNDLE Bundle;
416 /** List of generic usage records. (protected by SUPDRVDEVEXT::SpinLock) */
417 PSUPDRVUSAGE volatile pUsage;
418
419 /** The user id of the session. (Set by the OS part.) */
420 RTUID Uid;
421 /** The group id of the session. (Set by the OS part.) */
422 RTGID Gid;
423 /** The process (id) of the session. */
424 RTPROCESS Process;
425 /** Which process this session is associated with.
426 * This is NIL_RTR0PROCESS for kernel sessions and valid for user ones. */
427 RTR0PROCESS R0Process;
428#ifndef SUPDRV_AGNOSTIC
429# if defined(RT_OS_DARWIN)
430 /** Pointer to the associated org_virtualbox_SupDrvClient object. */
431 void *pvSupDrvClient;
432 /** Whether this session has been opened or not. */
433 bool fOpened;
434# endif
435# if defined(RT_OS_OS2)
436 /** The system file number of this session. */
437 uint16_t sfn;
438 uint16_t Alignment; /**< Alignment */
439# endif
440# if defined(RT_OS_DARWIN) || defined(RT_OS_OS2) || defined(RT_OS_SOLARIS)
441 /** Pointer to the next session with the same hash. */
442 PSUPDRVSESSION pNextHash;
443# endif
444#endif /* !SUPDRV_AGNOSTIC */
445} SUPDRVSESSION;
446
447
448/**
449 * Device extension.
450 */
451typedef struct SUPDRVDEVEXT
452{
453 /** Spinlock to serialize the initialization, usage counting and objects. */
454 RTSPINLOCK Spinlock;
455
456 /** List of registered objects. Protected by the spinlock. */
457 PSUPDRVOBJ volatile pObjs;
458 /** List of free object usage records. */
459 PSUPDRVUSAGE volatile pUsageFree;
460
461 /** Global cookie. */
462 uint32_t u32Cookie;
463 /** The actual size of SUPDRVSESSION. (SUPDRV_AGNOSTIC) */
464 uint32_t cbSession;
465
466 /** Loader mutex.
467 * This protects pvVMMR0, pvVMMR0Entry, pImages and SUPDRVSESSION::pLdrUsage. */
468#ifdef SUPDRV_USE_MUTEX_FOR_LDR
469 RTSEMMUTEX mtxLdr;
470#else
471 RTSEMFASTMUTEX mtxLdr;
472#endif
473
474 /** VMM Module 'handle'.
475 * 0 if the code VMM isn't loaded and Idt are nops. */
476 void * volatile pvVMMR0;
477 /** VMMR0EntryInt() pointer. */
478 DECLR0CALLBACKMEMBER(int, pfnVMMR0EntryInt, (PVM pVM, unsigned uOperation, void *pvArg));
479 /** VMMR0EntryFast() pointer. */
480 DECLR0CALLBACKMEMBER(void, pfnVMMR0EntryFast, (PVM pVM, VMCPUID idCpu, unsigned uOperation));
481 /** VMMR0EntryEx() pointer. */
482 DECLR0CALLBACKMEMBER(int, pfnVMMR0EntryEx, (PVM pVM, VMCPUID idCpu, unsigned uOperation, PSUPVMMR0REQHDR pReq, uint64_t u64Arg, PSUPDRVSESSION pSession));
483
484 /** Linked list of loaded code. */
485 PSUPDRVLDRIMAGE volatile pLdrImages;
486
487 /** GIP mutex.
488 * Any changes to any of the GIP members requires ownership of this mutex,
489 * except on driver init and termination. */
490#ifdef SUPDRV_USE_MUTEX_FOR_GIP
491 RTSEMMUTEX mtxGip;
492#else
493 RTSEMFASTMUTEX mtxGip;
494#endif
495 /** Pointer to the Global Info Page (GIP). */
496 PSUPGLOBALINFOPAGE pGip;
497 /** The physical address of the GIP. */
498 RTHCPHYS HCPhysGip;
499 /** Number of processes using the GIP.
500 * (The updates are suspend while cGipUsers is 0.)*/
501 uint32_t volatile cGipUsers;
502 /** The ring-0 memory object handle for the GIP page. */
503 RTR0MEMOBJ GipMemObj;
504 /** The GIP timer handle. */
505 PRTTIMER pGipTimer;
506 /** If non-zero we've successfully called RTTimerRequestSystemGranularity(). */
507 uint32_t u32SystemTimerGranularityGrant;
508 /** The CPU id of the GIP master.
509 * This CPU is responsible for the updating the common GIP data. */
510 RTCPUID volatile idGipMaster;
511
512 /** Component factory mutex.
513 * This protects pComponentFactoryHead and component factory querying. */
514 RTSEMFASTMUTEX mtxComponentFactory;
515 /** The head of the list of registered component factories. */
516 PSUPDRVFACTORYREG pComponentFactoryHead;
517
518#ifndef SUPDRV_AGNOSTIC
519# ifdef RT_OS_WINDOWS
520 /* Callback object returned by ExCreateCallback. */
521 PCALLBACK_OBJECT pObjPowerCallback;
522 /* Callback handle returned by ExRegisterCallback. */
523 PVOID hPowerCallback;
524# endif
525#endif
526} SUPDRVDEVEXT;
527
528
529RT_C_DECLS_BEGIN
530
531/*******************************************************************************
532* OS Specific Functions *
533*******************************************************************************/
534void VBOXCALL supdrvOSObjInitCreator(PSUPDRVOBJ pObj, PSUPDRVSESSION pSession);
535bool VBOXCALL supdrvOSObjCanAccess(PSUPDRVOBJ pObj, PSUPDRVSESSION pSession, const char *pszObjName, int *prc);
536bool VBOXCALL supdrvOSGetForcedAsyncTscMode(PSUPDRVDEVEXT pDevExt);
537int VBOXCALL supdrvOSEnableVTx(bool fEnabled);
538
539/**
540 * Try open the image using the native loader.
541 *
542 * @returns IPRT status code.
543 * @retval VERR_NOT_SUPPORTED if native loading isn't supported.
544 *
545 * @param pDevExt The device globals.
546 * @param pImage The image handle. pvImage should be set on
547 * success, pvImageAlloc can also be set if
548 * appropriate.
549 * @param pszFilename The file name - UTF-8, may containing UNIX
550 * slashes on non-UNIX systems.
551 */
552int VBOXCALL supdrvOSLdrOpen(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage, const char *pszFilename);
553
554/**
555 * Validates an entry point address.
556 *
557 * Called before supdrvOSLdrLoad.
558 *
559 * @returns IPRT status code.
560 * @param pDevExt The device globals.
561 * @param pImage The image data (still in the open state).
562 * @param pv The address within the image.
563 * @param pbImageBits The image bits as loaded by ring-3.
564 */
565int VBOXCALL supdrvOSLdrValidatePointer(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage,
566 void *pv, const uint8_t *pbImageBits);
567
568/**
569 * Load the image.
570 *
571 * @returns IPRT status code.
572 * @param pDevExt The device globals.
573 * @param pImage The image data (up to date except for some
574 * entry point pointers).
575 * @param pbImageBits The image bits as loaded by ring-3.
576 */
577int VBOXCALL supdrvOSLdrLoad(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage, const uint8_t *pbImageBits);
578
579
580/**
581 * Unload the image.
582 *
583 * @param pDevExt The device globals.
584 * @param pImage The image data (mostly still valid).
585 */
586void VBOXCALL supdrvOSLdrUnload(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage);
587
588
589/*******************************************************************************
590* Shared Functions *
591*******************************************************************************/
592/* SUPDrv.c */
593int VBOXCALL supdrvIOCtl(uintptr_t uIOCtl, PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, PSUPREQHDR pReqHdr);
594int VBOXCALL supdrvIOCtlFast(uintptr_t uIOCtl, VMCPUID idCpu, PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession);
595int VBOXCALL supdrvIDC(uintptr_t uIOCtl, PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, PSUPDRVIDCREQHDR pReqHdr);
596int VBOXCALL supdrvInitDevExt(PSUPDRVDEVEXT pDevExt, size_t cbSession);
597void VBOXCALL supdrvDeleteDevExt(PSUPDRVDEVEXT pDevExt);
598int VBOXCALL supdrvCreateSession(PSUPDRVDEVEXT pDevExt, bool fUser, PSUPDRVSESSION *ppSession);
599void VBOXCALL supdrvCloseSession(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession);
600void VBOXCALL supdrvCleanupSession(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession);
601
602RT_C_DECLS_END
603
604#endif
605
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