VirtualBox

source: vbox/trunk/src/VBox/HostDrivers/Support/freebsd/SUPDrv-freebsd.c@ 19745

最後變更 在這個檔案從19745是 19745,由 vboxsync 提交於 16 年 前

Support,FreeBSD: HEAD needs D_NEEDMINOR flag for cloning
  • 屬性 svn:eol-style 設為 native
  • 屬性 svn:keywords 設為 Id
檔案大小: 18.2 KB
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1/* $Id: SUPDrv-freebsd.c 19745 2009-05-15 15:32:16Z vboxsync $ */
2/** @file
3 * VBoxDrv - The VirtualBox Support Driver - FreeBSD specifics.
4 */
5
6/*
7 * Copyright (c) 2007 knut st. osmundsen <[email protected]>
8 *
9 * Permission is hereby granted, free of charge, to any person
10 * obtaining a copy of this software and associated documentation
11 * files (the "Software"), to deal in the Software without
12 * restriction, including without limitation the rights to use,
13 * copy, modify, merge, publish, distribute, sublicense, and/or sell
14 * copies of the Software, and to permit persons to whom the
15 * Software is furnished to do so, subject to the following
16 * conditions:
17 *
18 * The above copyright notice and this permission notice shall be
19 * included in all copies or substantial portions of the Software.
20 *
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
23 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
25 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
26 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
28 * OTHER DEALINGS IN THE SOFTWARE.
29 */
30
31/*******************************************************************************
32* Header Files *
33*******************************************************************************/
34#define LOG_GROUP LOG_GROUP_SUP_DRV
35/* Deal with conflicts first. */
36#include <sys/param.h>
37#undef PVM
38#include <sys/types.h>
39#include <sys/module.h>
40#include <sys/systm.h>
41#include <sys/errno.h>
42#include <sys/kernel.h>
43#include <sys/fcntl.h>
44#include <sys/conf.h>
45#include <sys/uio.h>
46
47#include "../SUPDrvInternal.h"
48#include <VBox/version.h>
49#include <iprt/initterm.h>
50#include <iprt/string.h>
51#include <iprt/spinlock.h>
52#include <iprt/process.h>
53#include <iprt/assert.h>
54#include <iprt/uuid.h>
55#include <VBox/log.h>
56#include <iprt/alloc.h>
57#include <iprt/err.h>
58
59#ifdef VBOX_WITH_HARDENING
60# define VBOXDRV_PERM 0600
61#else
62# define VBOXDRV_PERM 0666
63#endif
64
65/*******************************************************************************
66* Internal Functions *
67*******************************************************************************/
68static int VBoxDrvFreeBSDModuleEvent(struct module *pMod, int enmEventType, void *pvArg);
69static int VBoxDrvFreeBSDLoad(void);
70static int VBoxDrvFreeBSDUnload(void);
71static void VBoxDrvFreeBSDClone(void *pvArg, struct ucred *pCred, char *pachName, int cchName, struct cdev **ppDev);
72
73static d_fdopen_t VBoxDrvFreeBSDOpen;
74static d_close_t VBoxDrvFreeBSDClose;
75static d_ioctl_t VBoxDrvFreeBSDIOCtl;
76static int VBoxDrvFreeBSDIOCtlSlow(PSUPDRVSESSION pSession, u_long ulCmd, caddr_t pvData, struct thread *pTd);
77
78
79/*******************************************************************************
80* Global Variables *
81*******************************************************************************/
82/**
83 * Module info structure used by the kernel.
84 */
85static moduledata_t g_VBoxDrvFreeBSDModule =
86{
87 "vboxdrv",
88 VBoxDrvFreeBSDModuleEvent,
89 NULL
90};
91
92/** Declare the module as a pseudo device. */
93DECLARE_MODULE(vboxdrv, g_VBoxDrvFreeBSDModule, SI_SUB_PSEUDO, SI_ORDER_ANY);
94MODULE_VERSION(vboxdrv, 1);
95
96/**
97 * The /dev/vboxdrv character device entry points.
98 */
99static struct cdevsw g_VBoxDrvFreeBSDChrDevSW =
100{
101 .d_version = D_VERSION,
102#if __FreeBSD_version > 800061
103 .d_flags = D_PSEUDO | D_TRACKCLOSE | D_NEEDMINOR,
104#else
105 .d_flags = D_PSEUDO | D_TRACKCLOSE,
106#endif
107 .d_fdopen = VBoxDrvFreeBSDOpen,
108 .d_close = VBoxDrvFreeBSDClose,
109 .d_ioctl = VBoxDrvFreeBSDIOCtl,
110 .d_name = "vboxdrv"
111};
112
113/** List of cloned device. Managed by the kernel. */
114static struct clonedevs *g_pVBoxDrvFreeBSDClones;
115/** The dev_clone event handler tag. */
116static eventhandler_tag g_VBoxDrvFreeBSDEHTag;
117/** Reference counter. */
118static volatile uint32_t g_cUsers;
119
120/** The device extention. */
121static SUPDRVDEVEXT g_VBoxDrvFreeBSDDevExt;
122
123/**
124 * Module event handler.
125 *
126 * @param pMod The module structure.
127 * @param enmEventType The event type (modeventtype_t).
128 * @param pvArg Module argument. NULL.
129 *
130 * @return 0 on success, errno.h status code on failure.
131 */
132static int VBoxDrvFreeBSDModuleEvent(struct module *pMod, int enmEventType, void *pvArg)
133{
134 int rc;
135 switch (enmEventType)
136 {
137 case MOD_LOAD:
138 rc = VBoxDrvFreeBSDLoad();
139 break;
140
141 case MOD_UNLOAD:
142 rc = VBoxDrvFreeBSDUnload();
143 break;
144
145 case MOD_SHUTDOWN:
146 case MOD_QUIESCE:
147 default:
148 return EOPNOTSUPP;
149 }
150
151 if (RT_SUCCESS(rc))
152 return 0;
153 return RTErrConvertToErrno(rc);
154}
155
156
157static int VBoxDrvFreeBSDLoad(void)
158{
159 dprintf(("VBoxDrvFreeBSDLoad:\n"));
160
161 g_cUsers = 0;
162
163 /*
164 * Initialize the runtime.
165 */
166 int rc = RTR0Init(0);
167 if (RT_SUCCESS(rc))
168 {
169 /*
170 * Initialize the device extension.
171 */
172 rc = supdrvInitDevExt(&g_VBoxDrvFreeBSDDevExt);
173 if (RT_SUCCESS(rc))
174 {
175 /*
176 * Configure device cloning.
177 */
178 clone_setup(&g_pVBoxDrvFreeBSDClones);
179 g_VBoxDrvFreeBSDEHTag = EVENTHANDLER_REGISTER(dev_clone, VBoxDrvFreeBSDClone, 0, 1000);
180 if (g_VBoxDrvFreeBSDEHTag)
181 {
182 dprintf(("VBoxDrvFreeBSDLoad: returns successfully\n"));
183 return VINF_SUCCESS;
184 }
185
186 printf("vboxdrv: EVENTHANDLER_REGISTER(dev_clone,,,) failed\n");
187 clone_cleanup(&g_pVBoxDrvFreeBSDClones);
188 rc = SUPDRV_ERR_ALREADY_LOADED;
189 supdrvDeleteDevExt(&g_VBoxDrvFreeBSDDevExt);
190 }
191 else
192 printf("vboxdrv: supdrvInitDevExt failed, rc=%d\n", rc);
193 RTR0Term();
194 }
195 else
196 printf("vboxdrv: RTR0Init failed, rc=%d\n", rc);
197 return rc;
198}
199
200static int VBoxDrvFreeBSDUnload(void)
201{
202 dprintf(("VBoxDrvFreeBSDUnload:\n"));
203
204 if (g_cUsers > 0)
205 return EBUSY;
206
207 /*
208 * Reserve what we did in VBoxDrvFreeBSDInit.
209 */
210 clone_cleanup(&g_pVBoxDrvFreeBSDClones);
211
212 supdrvDeleteDevExt(&g_VBoxDrvFreeBSDDevExt);
213
214 RTR0Term();
215
216 memset(&g_VBoxDrvFreeBSDDevExt, 0, sizeof(g_VBoxDrvFreeBSDDevExt));
217
218 dprintf(("VBoxDrvFreeBSDUnload: returns\n"));
219 return VINF_SUCCESS;
220}
221
222
223/**
224 * DEVFS event handler.
225 */
226static void VBoxDrvFreeBSDClone(void *pvArg, struct ucred *pCred, char *pszName, int cchName, struct cdev **ppDev)
227{
228 int iUnit;
229 int rc;
230
231 dprintf(("VBoxDrvFreeBSDClone: pszName=%s ppDev=%p\n", pszName, ppDev));
232
233 /*
234 * One device node per user, si_drv1 points to the session.
235 * /dev/vboxdrv<N> where N = {0...255}.
236 */
237 if (!ppDev)
238 return;
239 if (dev_stdclone(pszName, NULL, "vboxdrv", &iUnit) != 1)
240 return;
241 if (iUnit >= 256 || iUnit < 0)
242 {
243 dprintf(("VBoxDrvFreeBSDClone: iUnit=%d >= 256 - rejected\n", iUnit));
244 return;
245 }
246
247 dprintf(("VBoxDrvFreeBSDClone: pszName=%s iUnit=%d\n", pszName, iUnit));
248
249 rc = clone_create(&g_pVBoxDrvFreeBSDClones, &g_VBoxDrvFreeBSDChrDevSW, &iUnit, ppDev, 0);
250 dprintf(("VBoxDrvFreeBSDClone: clone_create -> %d; iUnit=%d\n", rc, iUnit));
251 if (rc)
252 {
253#if __FreeBSD_version > 800061
254 *ppDev = make_dev(&g_VBoxDrvFreeBSDChrDevSW, iUnit, UID_ROOT, GID_WHEEL, VBOXDRV_PERM, "vboxdrv%d", iUnit);
255#else
256 *ppDev = make_dev(&g_VBoxDrvFreeBSDChrDevSW, unit2minor(iUnit), UID_ROOT, GID_WHEEL, VBOXDRV_PERM, "vboxdrv%d", iUnit);
257#endif
258 if (*ppDev)
259 {
260 dev_ref(*ppDev);
261 (*ppDev)->si_flags |= SI_CHEAPCLONE;
262 dprintf(("VBoxDrvFreeBSDClone: Created *ppDev=%p iUnit=%d si_drv1=%p si_drv2=%p\n",
263 *ppDev, iUnit, (*ppDev)->si_drv1, (*ppDev)->si_drv2));
264 (*ppDev)->si_drv1 = (*ppDev)->si_drv2 = NULL;
265 }
266 else
267 OSDBGPRINT(("VBoxDrvFreeBSDClone: make_dev iUnit=%d failed\n", iUnit));
268 }
269 else
270 dprintf(("VBoxDrvFreeBSDClone: Existing *ppDev=%p iUnit=%d si_drv1=%p si_drv2=%p\n",
271 *ppDev, iUnit, (*ppDev)->si_drv1, (*ppDev)->si_drv2));
272}
273
274
275
276/**
277 *
278 * @returns 0 on success, errno on failure.
279 * EBUSY if the device is used by someone else.
280 * @param pDev The device node.
281 * @param fOpen The open flags.
282 * @param pTd The thread.
283 * @param pFd The file descriptor. FreeBSD 7.0 and later.
284 * @param iFd The file descriptor index(?). Pre FreeBSD 7.0.
285 */
286#if __FreeBSD__ >= 7
287static int VBoxDrvFreeBSDOpen(struct cdev *pDev, int fOpen, struct thread *pTd, struct file *pFd)
288#else
289static int VBoxDrvFreeBSDOpen(struct cdev *pDev, int fOpen, struct thread *pTd, int iFd)
290#endif
291{
292 PSUPDRVSESSION pSession;
293 int rc;
294
295#if __FreeBSD_version < 800062
296 dprintf(("VBoxDrvFreeBSDOpen: fOpen=%#x iUnit=%d\n", fOpen, minor2unit(minor(pDev))));
297#else
298 dprintf(("VBoxDrvFreeBSDOpen: fOpen=%#x iUnit=%d\n", fOpen, minor(pDev)));
299#endif
300
301 /*
302 * Let's be a bit picky about the flags...
303 */
304 if (fOpen != (FREAD|FWRITE /*=O_RDWR*/))
305 {
306 dprintf(("VBoxDrvFreeBSDOpen: fOpen=%#x expected %#x\n", fOpen, O_RDWR));
307 return EINVAL;
308 }
309
310 /*
311 * Try grab it (we don't grab the giant, remember).
312 */
313 if (!ASMAtomicCmpXchgPtr(&pDev->si_drv1, (void *)0x42, NULL))
314 return EBUSY;
315
316 /*
317 * Create a new session.
318 */
319 rc = supdrvCreateSession(&g_VBoxDrvFreeBSDDevExt, true /* fUser */, &pSession);
320 if (RT_SUCCESS(rc))
321 {
322 /** @todo get (r)uid and (r)gid.
323 pSession->Uid = stuff;
324 pSession->Gid = stuff; */
325 if (ASMAtomicCmpXchgPtr(&pDev->si_drv1, pSession, (void *)0x42))
326 {
327 ASMAtomicIncU32(&g_cUsers);
328 return 0;
329 }
330
331 OSDBGPRINT(("VBoxDrvFreeBSDOpen: si_drv1=%p, expected 0x42!\n", pDev->si_drv1));
332 supdrvCloseSession(&g_VBoxDrvFreeBSDDevExt, pSession);
333 }
334
335 return RTErrConvertToErrno(rc);
336}
337
338
339/**
340 * Close a file device previously opened by VBoxDrvFreeBSDOpen
341 *
342 * @returns 0 on success.
343 * @param pDev The device.
344 * @param fFile The file descriptor flags.
345 * @param DevType The device type (CHR.
346 * @param pTd The calling thread.
347 */
348static int VBoxDrvFreeBSDClose(struct cdev *pDev, int fFile, int DevType, struct thread *pTd)
349{
350 PSUPDRVSESSION pSession = (PSUPDRVSESSION)pDev->si_drv1;
351#if __FreeBSD_version < 800062
352 dprintf(("VBoxDrvFreeBSDClose: fFile=%#x iUnit=%d pSession=%p\n", fFile, minor2unit(minor(pDev)), pSession));
353#else
354 dprintf(("VBoxDrvFreeBSDClose: fFile=%#x iUnit=%d pSession=%p\n", fFile, minor(pDev), pSession));
355#endif
356
357 /*
358 * Close the session if it's still hanging on to the device...
359 */
360 if (VALID_PTR(pSession))
361 {
362 supdrvCloseSession(&g_VBoxDrvFreeBSDDevExt, pSession);
363 if (!ASMAtomicCmpXchgPtr(&pDev->si_drv1, NULL, pSession))
364 OSDBGPRINT(("VBoxDrvFreeBSDClose: si_drv1=%p expected %p!\n", pDev->si_drv1, pSession));
365 ASMAtomicDecU32(&g_cUsers);
366 /* Don't use destroy_dev here because it may sleep resulting in a hanging user process. */
367 destroy_dev_sched(pDev);
368 }
369 else
370 OSDBGPRINT(("VBoxDrvFreeBSDClose: si_drv1=%p!\n", pSession));
371 return 0;
372}
373
374
375/**
376 * I/O control request.
377 *
378 * @returns depends...
379 * @param pDev The device.
380 * @param ulCmd The command.
381 * @param pvData Pointer to the data.
382 * @param fFile The file descriptor flags.
383 * @param pTd The calling thread.
384 */
385static int VBoxDrvFreeBSDIOCtl(struct cdev *pDev, u_long ulCmd, caddr_t pvData, int fFile, struct thread *pTd)
386{
387 /*
388 * Validate the input.
389 */
390 PSUPDRVSESSION pSession = (PSUPDRVSESSION)pDev->si_drv1;
391 if (RT_UNLIKELY(!VALID_PTR(pSession)))
392 return EINVAL;
393
394 /*
395 * Deal with the fast ioctl path first.
396 */
397 if ( ulCmd == SUP_IOCTL_FAST_DO_RAW_RUN
398 || ulCmd == SUP_IOCTL_FAST_DO_HWACC_RUN
399 || ulCmd == SUP_IOCTL_FAST_DO_NOP)
400 return supdrvIOCtlFast(ulCmd, *(uint32_t *)pvData, &g_VBoxDrvFreeBSDDevExt, pSession);
401
402 return VBoxDrvFreeBSDIOCtlSlow(pSession, ulCmd, pvData, pTd);
403}
404
405
406/**
407 * Deal with the 'slow' I/O control requests.
408 *
409 * @returns 0 on success, appropriate errno on failure.
410 * @param pSession The session.
411 * @param ulCmd The command.
412 * @param pvData The request data.
413 * @param pTd The calling thread.
414 */
415static int VBoxDrvFreeBSDIOCtlSlow(PSUPDRVSESSION pSession, u_long ulCmd, caddr_t pvData, struct thread *pTd)
416{
417 PSUPREQHDR pHdr;
418 uint32_t cbReq = IOCPARM_LEN(ulCmd);
419 void *pvUser = NULL;
420
421 /*
422 * Buffered request?
423 */
424 if ((IOC_DIRMASK & ulCmd) == IOC_INOUT)
425 {
426 pHdr = (PSUPREQHDR)pvData;
427 if (RT_UNLIKELY(cbReq < sizeof(*pHdr)))
428 {
429 OSDBGPRINT(("VBoxDrvFreeBSDIOCtlSlow: cbReq=%#x < %#x; ulCmd=%#lx\n", cbReq, (int)sizeof(*pHdr), ulCmd));
430 return EINVAL;
431 }
432 if (RT_UNLIKELY((pHdr->fFlags & SUPREQHDR_FLAGS_MAGIC_MASK) != SUPREQHDR_FLAGS_MAGIC))
433 {
434 OSDBGPRINT(("VBoxDrvFreeBSDIOCtlSlow: bad magic fFlags=%#x; ulCmd=%#lx\n", pHdr->fFlags, ulCmd));
435 return EINVAL;
436 }
437 if (RT_UNLIKELY( RT_MAX(pHdr->cbIn, pHdr->cbOut) != cbReq
438 || pHdr->cbIn < sizeof(*pHdr)
439 || pHdr->cbOut < sizeof(*pHdr)))
440 {
441 OSDBGPRINT(("VBoxDrvFreeBSDIOCtlSlow: max(%#x,%#x) != %#x; ulCmd=%#lx\n", pHdr->cbIn, pHdr->cbOut, cbReq, ulCmd));
442 return EINVAL;
443 }
444 }
445 /*
446 * Big unbuffered request?
447 */
448 else if ((IOC_DIRMASK & ulCmd) == IOC_VOID && !cbReq)
449 {
450 /*
451 * Read the header, validate it and figure out how much that needs to be buffered.
452 */
453 SUPREQHDR Hdr;
454 pvUser = *(void **)pvData;
455 int rc = copyin(pvUser, &Hdr, sizeof(Hdr));
456 if (RT_UNLIKELY(rc))
457 {
458 OSDBGPRINT(("VBoxDrvFreeBSDIOCtlSlow: copyin(%p,Hdr,) -> %#x; ulCmd=%#lx\n", pvUser, rc, ulCmd));
459 return rc;
460 }
461 if (RT_UNLIKELY((Hdr.fFlags & SUPREQHDR_FLAGS_MAGIC_MASK) != SUPREQHDR_FLAGS_MAGIC))
462 {
463 OSDBGPRINT(("VBoxDrvFreeBSDIOCtlSlow: bad magic fFlags=%#x; ulCmd=%#lx\n", Hdr.fFlags, ulCmd));
464 return EINVAL;
465 }
466 cbReq = RT_MAX(Hdr.cbIn, Hdr.cbOut);
467 if (RT_UNLIKELY( Hdr.cbIn < sizeof(Hdr)
468 || Hdr.cbOut < sizeof(Hdr)
469 || cbReq > _1M*16))
470 {
471 OSDBGPRINT(("VBoxDrvFreeBSDIOCtlSlow: max(%#x,%#x); ulCmd=%#lx\n", Hdr.cbIn, Hdr.cbOut, ulCmd));
472 return EINVAL;
473 }
474
475 /*
476 * Allocate buffer and copy in the data.
477 */
478 pHdr = (PSUPREQHDR)RTMemTmpAlloc(cbReq);
479 if (RT_UNLIKELY(!pHdr))
480 {
481 OSDBGPRINT(("VBoxDrvFreeBSDIOCtlSlow: failed to allocate buffer of %d bytes; ulCmd=%#lx\n", cbReq, ulCmd));
482 return ENOMEM;
483 }
484 rc = copyin(pvUser, pHdr, Hdr.cbIn);
485 if (RT_UNLIKELY(rc))
486 {
487 OSDBGPRINT(("VBoxDrvFreeBSDIOCtlSlow: copyin(%p,%p,%#x) -> %#x; ulCmd=%#lx\n",
488 pvUser, pHdr, Hdr.cbIn, rc, ulCmd));
489 RTMemTmpFree(pHdr);
490 return rc;
491 }
492 }
493 else
494 {
495 dprintf(("VBoxDrvFreeBSDIOCtlSlow: huh? cbReq=%#x ulCmd=%#lx\n", cbReq, ulCmd));
496 return EINVAL;
497 }
498
499 /*
500 * Process the IOCtl.
501 */
502 int rc = supdrvIOCtl(ulCmd, &g_VBoxDrvFreeBSDDevExt, pSession, pHdr);
503 if (RT_LIKELY(!rc))
504 {
505 /*
506 * If unbuffered, copy back the result before returning.
507 */
508 if (pvUser)
509 {
510 uint32_t cbOut = pHdr->cbOut;
511 if (cbOut > cbReq)
512 {
513 OSDBGPRINT(("VBoxDrvFreeBSDIOCtlSlow: too much output! %#x > %#x; uCmd=%#lx!\n", cbOut, cbReq, ulCmd));
514 cbOut = cbReq;
515 }
516 rc = copyout(pHdr, pvUser, cbOut);
517 if (RT_UNLIKELY(rc))
518 OSDBGPRINT(("VBoxDrvFreeBSDIOCtlSlow: copyout(%p,%p,%#x) -> %d; uCmd=%#lx!\n", pHdr, pvUser, cbOut, rc, ulCmd));
519
520 dprintf(("VBoxDrvFreeBSDIOCtlSlow: returns %d / %d ulCmd=%lx\n", 0, pHdr->rc, ulCmd));
521
522 /* cleanup */
523 RTMemTmpFree(pHdr);
524 }
525 }
526 else
527 {
528 /*
529 * The request failed, just clean up.
530 */
531 if (pvUser)
532 RTMemTmpFree(pHdr);
533
534 dprintf(("VBoxDrvFreeBSDIOCtlSlow: ulCmd=%lx pData=%p failed, rc=%d\n", ulCmd, pvData, rc));
535 rc = EINVAL;
536 }
537
538 return rc;
539}
540
541
542/**
543 * The SUPDRV IDC entry point.
544 *
545 * @returns VBox status code, see supdrvIDC.
546 * @param iReq The request code.
547 * @param pReq The request.
548 */
549int VBOXCALL SUPDrvFreeBSDIDC(uint32_t uReq, PSUPDRVIDCREQHDR pReq)
550{
551 PSUPDRVSESSION pSession;
552
553 /*
554 * Some quick validations.
555 */
556 if (RT_UNLIKELY(!VALID_PTR(pReq)))
557 return VERR_INVALID_POINTER;
558
559 pSession = pReq->pSession;
560 if (pSession)
561 {
562 if (RT_UNLIKELY(!VALID_PTR(pReq->pSession)))
563 return VERR_INVALID_PARAMETER;
564 if (RT_UNLIKELY(pSession->pDevExt != &g_VBoxDrvFreeBSDDevExt))
565 return VERR_INVALID_PARAMETER;
566 }
567 else if (RT_UNLIKELY(uReq != SUPDRV_IDC_REQ_CONNECT))
568 return VERR_INVALID_PARAMETER;
569
570 /*
571 * Do the job.
572 */
573 return supdrvIDC(uReq, &g_VBoxDrvFreeBSDDevExt, pSession, pReq);
574}
575
576
577void VBOXCALL supdrvOSObjInitCreator(PSUPDRVOBJ pObj, PSUPDRVSESSION pSession)
578{
579 NOREF(pObj);
580 NOREF(pSession);
581}
582
583
584bool VBOXCALL supdrvOSObjCanAccess(PSUPDRVOBJ pObj, PSUPDRVSESSION pSession, const char *pszObjName, int *prc)
585{
586 NOREF(pObj);
587 NOREF(pSession);
588 NOREF(pszObjName);
589 NOREF(prc);
590 return false;
591}
592
593
594bool VBOXCALL supdrvOSGetForcedAsyncTscMode(PSUPDRVDEVEXT pDevExt)
595{
596 return false;
597}
598
599
600SUPR0DECL(int) SUPR0Printf(const char *pszFormat, ...)
601{
602 va_list va;
603 char szMsg[256];
604 int cch;
605
606 va_start(va, pszFormat);
607 cch = RTStrPrintfV(szMsg, sizeof(szMsg), pszFormat, va);
608 va_end(va);
609
610 printf("%s", szMsg);
611
612 return cch;
613}
614
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