SUPDrv-solaris.c@ 54300

Last change on this file since 54300 was 53396, checked in by vboxsync, 10 years ago
HostDrivers/Support: Don't try measuring TSC deltas on OSes that normalizes TSC-deltas themselves, currently only Windows.
Property svn:eol-style set to `native` Property svn:keywords set to `Id Revision`
File size: 38.3 KB

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1	/* $Id: SUPDrv-solaris.c 53396 2014-11-25 15:01:59Z vboxsync $ */
2	/** @file
3	* VBoxDrv - The VirtualBox Support Driver - Solaris specifics.
4	*/
5
6	/*
7	* Copyright (C) 2006-2014 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	/*******************************************************************************
28	* Header Files *
29	*******************************************************************************/
30	#define LOG_GROUP LOG_GROUP_SUP_DRV
31	#ifdef DEBUG_ramshankar
32	# define LOG_ENABLED
33	# define LOG_INSTANCE RTLogRelDefaultInstance()
34	#endif
35	#include <sys/types.h>
36	#include <sys/param.h>
37	#include <sys/errno.h>
38	#include <sys/uio.h>
39	#include <sys/buf.h>
40	#include <sys/modctl.h>
41	#include <sys/kobj.h>
42	#include <sys/kobj_impl.h>
43	#include <sys/open.h>
44	#include <sys/conf.h>
45	#include <sys/cmn_err.h>
46	#include <sys/stat.h>
47	#include <sys/ddi.h>
48	#include <sys/sunddi.h>
49	#include <sys/file.h>
50	#include <sys/priv_names.h>
51	#undef u /* /usr/include/sys/user.h:249:1 is where this is defined to (curproc->p_user). very cool. */
52
53	#include "../SUPDrvInternal.h"
54	#include <VBox/log.h>
55	#include <VBox/version.h>
56	#include <iprt/semaphore.h>
57	#include <iprt/spinlock.h>
58	#include <iprt/mp.h>
59	#include <iprt/path.h>
60	#include <iprt/power.h>
61	#include <iprt/process.h>
62	#include <iprt/thread.h>
63	#include <iprt/initterm.h>
64	#include <iprt/alloc.h>
65	#include <iprt/string.h>
66	#include <iprt/err.h>
67
68	#include "dtrace/SUPDrv.h"
69
70
71	/*******************************************************************************
72	* Defined Constants And Macros *
73	*******************************************************************************/
74	/** The system device name. */
75	#define DEVICE_NAME_SYS "vboxdrv"
76	/** The user device name. */
77	#define DEVICE_NAME_USR "vboxdrvu"
78	/** The module description as seen in 'modinfo'. */
79	#define DEVICE_DESC "VirtualBox HostDrv"
80	/** Maximum number of driver instances. */
81	#define DEVICE_MAXINSTANCES 16
82
83
84	/*******************************************************************************
85	* Internal Functions *
86	*******************************************************************************/
87	static int VBoxDrvSolarisOpen(dev_t pDev, int fFlag, int fType, cred_t pCred);
88	static int VBoxDrvSolarisClose(dev_t Dev, int fFlag, int fType, cred_t *pCred);
89	static int VBoxDrvSolarisRead(dev_t Dev, struct uio pUio, cred_t pCred);
90	static int VBoxDrvSolarisWrite(dev_t Dev, struct uio pUio, cred_t pCred);
91	static int VBoxDrvSolarisIOCtl(dev_t Dev, int Cmd, intptr_t pArgs, int mode, cred_t pCred, int pVal);
92
93	static int VBoxDrvSolarisAttach(dev_info_t *pDip, ddi_attach_cmd_t Cmd);
94	static int VBoxDrvSolarisDetach(dev_info_t *pDip, ddi_detach_cmd_t Cmd);
95	static int VBoxDrvSolarisQuiesceNotNeeded(dev_info_t *pDip);
96
97	static int VBoxSupDrvErr2SolarisErr(int rc);
98	static int VBoxDrvSolarisIOCtlSlow(PSUPDRVSESSION pSession, int Cmd, int Mode, intptr_t pArgs);
99
100
101	/*******************************************************************************
102	* Global Variables *
103	*******************************************************************************/
104	/**
105	* cb_ops: for drivers that support char/block entry points
106	*/
107	static struct cb_ops g_VBoxDrvSolarisCbOps =
108	{
109	VBoxDrvSolarisOpen,
110	VBoxDrvSolarisClose,
111	nodev, /* b strategy */
112	nodev, /* b dump */
113	nodev, /* b print */
114	VBoxDrvSolarisRead,
115	VBoxDrvSolarisWrite,
116	VBoxDrvSolarisIOCtl,
117	nodev, /* c devmap */
118	nodev, /* c mmap */
119	nodev, /* c segmap */
120	nochpoll, /* c poll */
121	ddi_prop_op, /* property ops */
122	NULL, /* streamtab */
123	D_NEW \| D_MP, /* compat. flag */
124	CB_REV /* revision */
125	};
126
127	/**
128	* dev_ops: for driver device operations
129	*/
130	static struct dev_ops g_VBoxDrvSolarisDevOps =
131	{
132	DEVO_REV, /* driver build revision */
133	0, /* ref count */
134	nulldev, /* get info */
135	nulldev, /* identify */
136	nulldev, /* probe */
137	VBoxDrvSolarisAttach,
138	VBoxDrvSolarisDetach,
139	nodev, /* reset */
140	&g_VBoxDrvSolarisCbOps,
141	(struct bus_ops *)0,
142	nodev, /* power */
143	VBoxDrvSolarisQuiesceNotNeeded
144	};
145
146	/**
147	* modldrv: export driver specifics to the kernel
148	*/
149	static struct modldrv g_VBoxDrvSolarisModule =
150	{
151	&mod_driverops, /* extern from kernel */
152	DEVICE_DESC " " VBOX_VERSION_STRING "r" RT_XSTR(VBOX_SVN_REV),
153	&g_VBoxDrvSolarisDevOps
154	};
155
156	/**
157	* modlinkage: export install/remove/info to the kernel
158	*/
159	static struct modlinkage g_VBoxDrvSolarisModLinkage =
160	{
161	MODREV_1, /* loadable module system revision */
162	{
163	&g_VBoxDrvSolarisModule,
164	NULL /* terminate array of linkage structures */
165	}
166	};
167
168	#ifndef USE_SESSION_HASH
169	/**
170	* State info for each open file handle.
171	*/
172	typedef struct
173	{
174	/*< Pointer to the session data. /
175	PSUPDRVSESSION pSession;
176	} vbox_devstate_t;
177	#else
178	/** State info. for each driver instance. */
179	typedef struct
180	{
181	dev_info_t pDip; / Device handle */
182	} vbox_devstate_t;
183	#endif
184
185	/** Opaque pointer to list of state */
186	static void *g_pVBoxDrvSolarisState;
187
188	/** Device extention & session data association structure */
189	static SUPDRVDEVEXT g_DevExt;
190
191	/** Hash table */
192	static PSUPDRVSESSION g_apSessionHashTab[19];
193	/** Spinlock protecting g_apSessionHashTab. */
194	static RTSPINLOCK g_Spinlock = NIL_RTSPINLOCK;
195	/** Calculates bucket index into g_apSessionHashTab.*/
196	#define SESSION_HASH(sfn) ((sfn) % RT_ELEMENTS(g_apSessionHashTab))
197
198	/**
199	* Kernel entry points
200	*/
201	int _init(void)
202	{
203	#if 0 /* No IPRT logging before RTR0Init() is done! */
204	LogFlowFunc(("vboxdrv:_init\n"));
205	#endif
206
207	/*
208	* Prevent module autounloading.
209	*/
210	modctl_t *pModCtl = mod_getctl(&g_VBoxDrvSolarisModLinkage);
211	if (pModCtl)
212	pModCtl->mod_loadflags \|= MOD_NOAUTOUNLOAD;
213	else
214	cmn_err(CE_NOTE, "vboxdrv: failed to disable autounloading!\n");
215
216	/*
217	* Initialize IPRT R0 driver, which internally calls OS-specific r0 init.
218	*/
219	int rc = RTR0Init(0);
220	if (RT_SUCCESS(rc))
221	{
222	/*
223	* Initialize the device extension
224	*/
225	rc = supdrvInitDevExt(&g_DevExt, sizeof(SUPDRVSESSION));
226	if (RT_SUCCESS(rc))
227	{
228	cmn_err(CE_CONT, "!tsc::mode %s @ tentative %lu Hz\n", SUPGetGIPModeName(g_DevExt.pGip), g_DevExt.pGip->u64CpuHz);
229
230	/*
231	* Initialize the session hash table.
232	*/
233	memset(g_apSessionHashTab, 0, sizeof(g_apSessionHashTab));
234	rc = RTSpinlockCreate(&g_Spinlock, RTSPINLOCK_FLAGS_INTERRUPT_SAFE, "VBoxDrvSol");
235	if (RT_SUCCESS(rc))
236	{
237	rc = ddi_soft_state_init(&g_pVBoxDrvSolarisState, sizeof(vbox_devstate_t), 8);
238	if (!rc)
239	{
240	rc = mod_install(&g_VBoxDrvSolarisModLinkage);
241	if (!rc)
242	return rc; /* success */
243
244	ddi_soft_state_fini(&g_pVBoxDrvSolarisState);
245	LogRel(("vboxdrv: mod_install failed! rc=%d\n", rc));
246	}
247	else
248	LogRel(("vboxdrv: failed to initialize soft state.\n"));
249
250	RTSpinlockDestroy(g_Spinlock);
251	g_Spinlock = NIL_RTSPINLOCK;
252	}
253	else
254	{
255	LogRel(("VBoxDrvSolarisAttach: RTSpinlockCreate failed\n"));
256	rc = RTErrConvertToErrno(rc);
257	}
258	supdrvDeleteDevExt(&g_DevExt);
259	}
260	else
261	{
262	LogRel(("VBoxDrvSolarisAttach: supdrvInitDevExt failed\n"));
263	rc = EINVAL;
264	}
265	RTR0TermForced();
266	}
267	else
268	{
269	LogRel(("VBoxDrvSolarisAttach: failed to init R0Drv\n"));
270	rc = RTErrConvertToErrno(rc);
271	}
272	memset(&g_DevExt, 0, sizeof(g_DevExt));
273
274	return rc;
275	}
276
277
278	int _fini(void)
279	{
280	LogFlowFunc(("vboxdrv:_fini\n"));
281
282	/*
283	* Undo the work we did at start (in the reverse order).
284	*/
285	int rc = mod_remove(&g_VBoxDrvSolarisModLinkage);
286	if (rc != 0)
287	return rc;
288
289	supdrvDeleteDevExt(&g_DevExt);
290
291	rc = RTSpinlockDestroy(g_Spinlock);
292	AssertRC(rc);
293	g_Spinlock = NIL_RTSPINLOCK;
294
295	RTR0TermForced();
296
297	memset(&g_DevExt, 0, sizeof(g_DevExt));
298
299	ddi_soft_state_fini(&g_pVBoxDrvSolarisState);
300	return 0;
301	}
302
303
304	int _info(struct modinfo *pModInfo)
305	{
306	#if 0 /* No IPRT logging before RTR0Init() is done! And yes this is called before _init()!*/
307	LogFlowFunc(("vboxdrv:_init\n"));
308	#endif
309	int e = mod_info(&g_VBoxDrvSolarisModLinkage, pModInfo);
310	return e;
311	}
312
313
314	/**
315	* Attach entry point, to attach a device to the system or resume it.
316	*
317	* @param pDip The module structure instance.
318	* @param enmCmd Operation type (attach/resume).
319	*
320	* @return corresponding solaris error code.
321	*/
322	static int VBoxDrvSolarisAttach(dev_info_t *pDip, ddi_attach_cmd_t enmCmd)
323	{
324	LogFlowFunc(("VBoxDrvSolarisAttach\n"));
325
326	switch (enmCmd)
327	{
328	case DDI_ATTACH:
329	{
330	int rc;
331	#ifdef USE_SESSION_HASH
332	int instance = ddi_get_instance(pDip);
333	vbox_devstate_t *pState;
334
335	if (ddi_soft_state_zalloc(g_pVBoxDrvSolarisState, instance) != DDI_SUCCESS)
336	{
337	LogRel(("VBoxDrvSolarisAttach: state alloc failed\n"));
338	return DDI_FAILURE;
339	}
340
341	pState = ddi_get_soft_state(g_pVBoxDrvSolarisState, instance);
342	#endif
343
344	/*
345	* Register for suspend/resume notifications
346	*/
347	rc = ddi_prop_create(DDI_DEV_T_NONE, pDip, DDI_PROP_CANSLEEP /* kmem alloc can sleep */,
348	"pm-hardware-state", "needs-suspend-resume", sizeof("needs-suspend-resume"));
349	if (rc != DDI_PROP_SUCCESS)
350	LogRel(("vboxdrv: Suspend/Resume notification registration failed.\n"));
351
352	/*
353	* Register ourselves as a character device, pseudo-driver
354	*/
355	#ifdef VBOX_WITH_HARDENING
356	rc = ddi_create_priv_minor_node(pDip, DEVICE_NAME_SYS, S_IFCHR, 0 /minor/, DDI_PSEUDO,
357	0, NULL, NULL, 0600);
358	#else
359	rc = ddi_create_priv_minor_node(pDip, DEVICE_NAME_SYS, S_IFCHR, 0 /minor/, DDI_PSEUDO,
360	0, "none", "none", 0666);
361	#endif
362	if (rc == DDI_SUCCESS)
363	{
364	rc = ddi_create_priv_minor_node(pDip, DEVICE_NAME_USR, S_IFCHR, 1 /minor/, DDI_PSEUDO,
365	0, "none", "none", 0666);
366	if (rc == DDI_SUCCESS)
367	{
368	#ifdef USE_SESSION_HASH
369	pState->pDip = pDip;
370	#endif
371	ddi_report_dev(pDip);
372	return DDI_SUCCESS;
373	}
374	ddi_remove_minor_node(pDip, NULL);
375	}
376
377	return DDI_FAILURE;
378	}
379
380	case DDI_RESUME:
381	{
382	#if 0
383	RTSemFastMutexRequest(g_DevExt.mtxGip);
384	if (g_DevExt.pGipTimer)
385	RTTimerStart(g_DevExt.pGipTimer, 0);
386
387	RTSemFastMutexRelease(g_DevExt.mtxGip);
388	#endif
389	RTPowerSignalEvent(RTPOWEREVENT_RESUME);
390	LogFlow(("vboxdrv: Awakened from suspend.\n"));
391	return DDI_SUCCESS;
392	}
393
394	default:
395	return DDI_FAILURE;
396	}
397
398	return DDI_FAILURE;
399	}
400
401
402	/**
403	* Detach entry point, to detach a device to the system or suspend it.
404	*
405	* @param pDip The module structure instance.
406	* @param enmCmd Operation type (detach/suspend).
407	*
408	* @return corresponding solaris error code.
409	*/
410	static int VBoxDrvSolarisDetach(dev_info_t *pDip, ddi_detach_cmd_t enmCmd)
411	{
412	LogFlowFunc(("VBoxDrvSolarisDetach\n"));
413	switch (enmCmd)
414	{
415	case DDI_DETACH:
416	{
417	#ifndef USE_SESSION_HASH
418	ddi_remove_minor_node(pDip, NULL);
419	#else
420	int instance = ddi_get_instance(pDip);
421	vbox_devstate_t *pState = ddi_get_soft_state(g_pVBoxDrvSolarisState, instance);
422	ddi_remove_minor_node(pDip, NULL);
423	ddi_soft_state_free(g_pVBoxDrvSolarisState, instance);
424	#endif
425	ddi_prop_remove_all(pDip);
426	return DDI_SUCCESS;
427	}
428
429	case DDI_SUSPEND:
430	{
431	#if 0
432	RTSemFastMutexRequest(g_DevExt.mtxGip);
433	if (g_DevExt.pGipTimer && g_DevExt.cGipUsers > 0)
434	RTTimerStop(g_DevExt.pGipTimer);
435
436	RTSemFastMutexRelease(g_DevExt.mtxGip);
437	#endif
438	RTPowerSignalEvent(RTPOWEREVENT_SUSPEND);
439	LogFlow(("vboxdrv: Falling to suspend mode.\n"));
440	return DDI_SUCCESS;
441
442	}
443
444	default:
445	return DDI_FAILURE;
446	}
447	}
448
449
450	/**
451	* Quiesce not-needed entry point, as Solaris 10 doesn't have any
452	* ddi_quiesce_not_needed() function.
453	*
454	* @param pDip The module structure instance.
455	*
456	* @return corresponding solaris error code.
457	*/
458	static int VBoxDrvSolarisQuiesceNotNeeded(dev_info_t *pDip)
459	{
460	return DDI_SUCCESS;
461	}
462
463
464	/**
465	* open() worker.
466	*/
467	static int VBoxDrvSolarisOpen(dev_t pDev, int fFlag, int fType, cred_t pCred)
468	{
469	const bool fUnrestricted = getminor(*pDev) == 0;
470	PSUPDRVSESSION pSession;
471	int rc;
472
473	LogFlowFunc(("VBoxDrvSolarisOpen: pDev=%p:%#x\n", pDev, *pDev));
474
475	/*
476	* Validate input
477	*/
478	if ( (getminor(pDev) != 0 && getminor(pDev) != 1)
479	\|\| fType != OTYP_CHR)
480	return EINVAL; /* See mmopen for precedent. */
481
482	#ifndef USE_SESSION_HASH
483	/*
484	* Locate a new device open instance.
485	*
486	* For each open call we'll allocate an item in the soft state of the device.
487	* The item index is stored in the dev_t. I hope this is ok...
488	*/
489	vbox_devstate_t *pState = NULL;
490	unsigned iOpenInstance;
491	for (iOpenInstance = 0; iOpenInstance < 4096; iOpenInstance++)
492	{
493	if ( !ddi_get_soft_state(g_pVBoxDrvSolarisState, iOpenInstance) /* faster */
494	&& ddi_soft_state_zalloc(g_pVBoxDrvSolarisState, iOpenInstance) == DDI_SUCCESS)
495	{
496	pState = ddi_get_soft_state(g_pVBoxDrvSolarisState, iOpenInstance);
497	break;
498	}
499	}
500	if (!pState)
501	{
502	LogRel(("VBoxDrvSolarisOpen: too many open instances.\n"));
503	return ENXIO;
504	}
505
506	/*
507	* Create a new session.
508	*/
509	rc = supdrvCreateSession(&g_DevExt, true /* fUser */, fUnrestricted, &pSession);
510	if (RT_SUCCESS(rc))
511	{
512	pSession->Uid = crgetruid(pCred);
513	pSession->Gid = crgetrgid(pCred);
514
515	pState->pSession = pSession;
516	pDev = makedevice(getmajor(pDev), iOpenInstance);
517	LogFlow(("VBoxDrvSolarisOpen: Dev=%#x pSession=%p pid=%d r0proc=%p thread=%p\n",
518	*pDev, pSession, RTProcSelf(), RTR0ProcHandleSelf(), RTThreadNativeSelf() ));
519	return 0;
520	}
521
522	/* failed - clean up */
523	ddi_soft_state_free(g_pVBoxDrvSolarisState, iOpenInstance);
524
525	#else
526	/*
527	* Create a new session.
528	* Sessions in Solaris driver are mostly useless. It's however needed
529	* in VBoxDrvSolarisIOCtlSlow() while calling supdrvIOCtl()
530	*/
531	rc = supdrvCreateSession(&g_DevExt, true /* fUser */, fUnrestricted, &pSession);
532	if (RT_SUCCESS(rc))
533	{
534	unsigned iHash;
535
536	pSession->Uid = crgetruid(pCred);
537	pSession->Gid = crgetrgid(pCred);
538
539	/*
540	* Insert it into the hash table.
541	*/
542	# error "Only one entry per process!"
543	iHash = SESSION_HASH(pSession->Process);
544	RTSpinlockAcquire(g_Spinlock);
545	pSession->pNextHash = g_apSessionHashTab[iHash];
546	g_apSessionHashTab[iHash] = pSession;
547	RTSpinlockRelease(g_Spinlock);
548	LogFlow(("VBoxDrvSolarisOpen success\n"));
549	}
550
551	int instance;
552	for (instance = 0; instance < DEVICE_MAXINSTANCES; instance++)
553	{
554	vbox_devstate_t *pState = ddi_get_soft_state(g_pVBoxDrvSolarisState, instance);
555	if (pState)
556	break;
557	}
558
559	if (instance >= DEVICE_MAXINSTANCES)
560	{
561	LogRel(("VBoxDrvSolarisOpen: All instances exhausted\n"));
562	return ENXIO;
563	}
564
565	pDev = makedevice(getmajor(pDev), instance);
566	#endif
567
568	return VBoxSupDrvErr2SolarisErr(rc);
569	}
570
571
572	static int VBoxDrvSolarisClose(dev_t Dev, int flag, int otyp, cred_t *cred)
573	{
574	LogFlowFunc(("VBoxDrvSolarisClose: Dev=%#x\n", Dev));
575
576	#ifndef USE_SESSION_HASH
577	/*
578	* Get the session and free the soft state item.
579	*/
580	vbox_devstate_t *pState = ddi_get_soft_state(g_pVBoxDrvSolarisState, getminor(Dev));
581	if (!pState)
582	{
583	LogRel(("VBoxDrvSolarisClose: no state data for %#x (%d)\n", Dev, getminor(Dev)));
584	return EFAULT;
585	}
586
587	PSUPDRVSESSION pSession = pState->pSession;
588	pState->pSession = NULL;
589	ddi_soft_state_free(g_pVBoxDrvSolarisState, getminor(Dev));
590
591	if (!pSession)
592	{
593	LogRel(("VBoxDrvSolarisClose: no session in state data for %#x (%d)\n", Dev, getminor(Dev)));
594	return EFAULT;
595	}
596	LogFlow(("VBoxDrvSolarisClose: Dev=%#x pSession=%p pid=%d r0proc=%p thread=%p\n",
597	Dev, pSession, RTProcSelf(), RTR0ProcHandleSelf(), RTThreadNativeSelf() ));
598
599	#else
600	const RTPROCESS Process = RTProcSelf();
601	const unsigned iHash = SESSION_HASH(Process);
602	PSUPDRVSESSION pSession;
603
604	/*
605	* Remove from the hash table.
606	*/
607	RTSpinlockAcquire(g_Spinlock);
608	pSession = g_apSessionHashTab[iHash];
609	if (pSession)
610	{
611	if (pSession->Process == Process)
612	{
613	g_apSessionHashTab[iHash] = pSession->pNextHash;
614	pSession->pNextHash = NULL;
615	}
616	else
617	{
618	PSUPDRVSESSION pPrev = pSession;
619	pSession = pSession->pNextHash;
620	while (pSession)
621	{
622	if (pSession->Process == Process)
623	{
624	pPrev->pNextHash = pSession->pNextHash;
625	pSession->pNextHash = NULL;
626	break;
627	}
628
629	/* next */
630	pPrev = pSession;
631	pSession = pSession->pNextHash;
632	}
633	}
634	}
635	RTSpinlockRelease(g_Spinlock);
636	if (!pSession)
637	{
638	LogRel(("VBoxDrvSolarisClose: WHAT?!? pSession == NULL! This must be a mistake... pid=%d (close)\n", (int)Process));
639	return EFAULT;
640	}
641	#endif
642
643	/*
644	* Close the session.
645	*/
646	supdrvSessionRelease(pSession);
647	return 0;
648	}
649
650
651	static int VBoxDrvSolarisRead(dev_t Dev, struct uio pUio, cred_t pCred)
652	{
653	LogFlowFunc(("VBoxDrvSolarisRead"));
654	return 0;
655	}
656
657
658	static int VBoxDrvSolarisWrite(dev_t Dev, struct uio pUio, cred_t pCred)
659	{
660	LogFlowFunc(("VBoxDrvSolarisWrite"));
661	return 0;
662	}
663
664
665	/**
666	* Driver ioctl, an alternate entry point for this character driver.
667	*
668	* @param Dev Device number
669	* @param Cmd Operation identifier
670	* @param pArg Arguments from user to driver
671	* @param Mode Information bitfield (read/write, address space etc.)
672	* @param pCred User credentials
673	* @param pVal Return value for calling process.
674	*
675	* @return corresponding solaris error code.
676	*/
677	static int VBoxDrvSolarisIOCtl(dev_t Dev, int Cmd, intptr_t pArgs, int Mode, cred_t pCred, int pVal)
678	{
679	#ifndef USE_SESSION_HASH
680	/*
681	* Get the session from the soft state item.
682	*/
683	vbox_devstate_t *pState = ddi_get_soft_state(g_pVBoxDrvSolarisState, getminor(Dev));
684	if (!pState)
685	{
686	LogRel(("VBoxDrvSolarisIOCtl: no state data for %#x (%d)\n", Dev, getminor(Dev)));
687	return EINVAL;
688	}
689
690	PSUPDRVSESSION pSession = pState->pSession;
691	if (!pSession)
692	{
693	LogRel(("VBoxDrvSolarisIOCtl: no session in state data for %#x (%d)\n", Dev, getminor(Dev)));
694	return DDI_SUCCESS;
695	}
696	#else
697	const RTPROCESS Process = RTProcSelf();
698	const unsigned iHash = SESSION_HASH(Process);
699	PSUPDRVSESSION pSession;
700	const bool fUnrestricted = getminor(Dev) == 0;
701
702	/*
703	* Find the session.
704	*/
705	RTSpinlockAcquire(g_Spinlock);
706	pSession = g_apSessionHashTab[iHash];
707	while (pSession && pSession->Process != Process && pSession->fUnrestricted == fUnrestricted);
708	pSession = pSession->pNextHash;
709	RTSpinlockRelease(g_Spinlock);
710	if (!pSession)
711	{
712	LogRel(("VBoxSupDrvIOCtl: WHAT?!? pSession == NULL! This must be a mistake... pid=%d iCmd=%#x Dev=%#x\n",
713	(int)Process, Cmd, (int)Dev));
714	return EINVAL;
715	}
716	#endif
717
718	/*
719	* Deal with the two high-speed IOCtl that takes it's arguments from
720	* the session and iCmd, and only returns a VBox status code.
721	*/
722	if ( ( Cmd == SUP_IOCTL_FAST_DO_RAW_RUN
723	\|\| Cmd == SUP_IOCTL_FAST_DO_HM_RUN
724	\|\| Cmd == SUP_IOCTL_FAST_DO_NOP)
725	&& pSession->fUnrestricted)
726	{
727	*pVal = supdrvIOCtlFast(Cmd, pArgs, &g_DevExt, pSession);
728	return 0;
729	}
730
731	return VBoxDrvSolarisIOCtlSlow(pSession, Cmd, Mode, pArgs);
732	}
733
734
735	/** @def IOCPARM_LEN
736	* Gets the length from the ioctl number.
737	* This is normally defined by sys/ioccom.h on BSD systems...
738	*/
739	#ifndef IOCPARM_LEN
740	# define IOCPARM_LEN(x) ( ((x) >> 16) & IOCPARM_MASK )
741	#endif
742
743
744	/**
745	* Worker for VBoxSupDrvIOCtl that takes the slow IOCtl functions.
746	*
747	* @returns Solaris errno.
748	*
749	* @param pSession The session.
750	* @param Cmd The IOCtl command.
751	* @param Mode Information bitfield (for specifying ownership of data)
752	* @param iArg User space address of the request buffer.
753	*/
754	static int VBoxDrvSolarisIOCtlSlow(PSUPDRVSESSION pSession, int iCmd, int Mode, intptr_t iArg)
755	{
756	int rc;
757	uint32_t cbBuf = 0;
758	union
759	{
760	SUPREQHDR Hdr;
761	uint8_t abBuf[64];
762	} StackBuf;
763	PSUPREQHDR pHdr;
764
765
766	/*
767	* Read the header.
768	*/
769	if (RT_UNLIKELY(IOCPARM_LEN(iCmd) != sizeof(StackBuf.Hdr)))
770	{
771	LogRel(("VBoxDrvSolarisIOCtlSlow: iCmd=%#x len %d expected %d\n", iCmd, IOCPARM_LEN(iCmd), sizeof(StackBuf.Hdr)));
772	return EINVAL;
773	}
774	rc = ddi_copyin((void *)iArg, &StackBuf.Hdr, sizeof(StackBuf.Hdr), Mode);
775	if (RT_UNLIKELY(rc))
776	{
777	LogRel(("VBoxDrvSolarisIOCtlSlow: ddi_copyin(,%#lx,) failed; iCmd=%#x. rc=%d\n", iArg, iCmd, rc));
778	return EFAULT;
779	}
780	if (RT_UNLIKELY((StackBuf.Hdr.fFlags & SUPREQHDR_FLAGS_MAGIC_MASK) != SUPREQHDR_FLAGS_MAGIC))
781	{
782	LogRel(("VBoxDrvSolarisIOCtlSlow: bad header magic %#x; iCmd=%#x\n", StackBuf.Hdr.fFlags & SUPREQHDR_FLAGS_MAGIC_MASK, iCmd));
783	return EINVAL;
784	}
785	cbBuf = RT_MAX(StackBuf.Hdr.cbIn, StackBuf.Hdr.cbOut);
786	if (RT_UNLIKELY( StackBuf.Hdr.cbIn < sizeof(StackBuf.Hdr)
787	\|\| StackBuf.Hdr.cbOut < sizeof(StackBuf.Hdr)
788	\|\| cbBuf > _1M*16))
789	{
790	LogRel(("VBoxDrvSolarisIOCtlSlow: max(%#x,%#x); iCmd=%#x\n", StackBuf.Hdr.cbIn, StackBuf.Hdr.cbOut, iCmd));
791	return EINVAL;
792	}
793
794	/*
795	* Buffer the request.
796	*/
797	if (cbBuf <= sizeof(StackBuf))
798	pHdr = &StackBuf.Hdr;
799	else
800	{
801	pHdr = RTMemTmpAlloc(cbBuf);
802	if (RT_UNLIKELY(!pHdr))
803	{
804	LogRel(("VBoxDrvSolarisIOCtlSlow: failed to allocate buffer of %d bytes for iCmd=%#x.\n", cbBuf, iCmd));
805	return ENOMEM;
806	}
807	}
808	rc = ddi_copyin((void *)iArg, pHdr, cbBuf, Mode);
809	if (RT_UNLIKELY(rc))
810	{
811	LogRel(("VBoxDrvSolarisIOCtlSlow: copy_from_user(,%#lx, %#x) failed; iCmd=%#x. rc=%d\n", iArg, cbBuf, iCmd, rc));
812	if (pHdr != &StackBuf.Hdr)
813	RTMemFree(pHdr);
814	return EFAULT;
815	}
816
817	/*
818	* Process the IOCtl.
819	*/
820	rc = supdrvIOCtl(iCmd, &g_DevExt, pSession, pHdr, cbBuf);
821
822	/*
823	* Copy ioctl data and output buffer back to user space.
824	*/
825	if (RT_LIKELY(!rc))
826	{
827	uint32_t cbOut = pHdr->cbOut;
828	if (RT_UNLIKELY(cbOut > cbBuf))
829	{
830	LogRel(("VBoxDrvSolarisIOCtlSlow: too much output! %#x > %#x; iCmd=%#x!\n", cbOut, cbBuf, iCmd));
831	cbOut = cbBuf;
832	}
833	rc = ddi_copyout(pHdr, (void *)iArg, cbOut, Mode);
834	if (RT_UNLIKELY(rc != 0))
835	{
836	/* this is really bad */
837	LogRel(("VBoxDrvSolarisIOCtlSlow: ddi_copyout(,%p,%d) failed. rc=%d\n", (void *)iArg, cbBuf, rc));
838	rc = EFAULT;
839	}
840	}
841	else
842	rc = EINVAL;
843
844	if (pHdr != &StackBuf.Hdr)
845	RTMemTmpFree(pHdr);
846	return rc;
847	}
848
849
850	/**
851	* The SUPDRV IDC entry point.
852	*
853	* @returns VBox status code, see supdrvIDC.
854	* @param iReq The request code.
855	* @param pReq The request.
856	*/
857	int VBOXCALL SUPDrvSolarisIDC(uint32_t uReq, PSUPDRVIDCREQHDR pReq)
858	{
859	PSUPDRVSESSION pSession;
860
861	/*
862	* Some quick validations.
863	*/
864	if (RT_UNLIKELY(!VALID_PTR(pReq)))
865	return VERR_INVALID_POINTER;
866
867	pSession = pReq->pSession;
868	if (pSession)
869	{
870	if (RT_UNLIKELY(!VALID_PTR(pSession)))
871	return VERR_INVALID_PARAMETER;
872	if (RT_UNLIKELY(pSession->pDevExt != &g_DevExt))
873	return VERR_INVALID_PARAMETER;
874	}
875	else if (RT_UNLIKELY(uReq != SUPDRV_IDC_REQ_CONNECT))
876	return VERR_INVALID_PARAMETER;
877
878	/*
879	* Do the job.
880	*/
881	return supdrvIDC(uReq, &g_DevExt, pSession, pReq);
882	}
883
884
885	/**
886	* Converts an supdrv error code to a solaris error code.
887	*
888	* @returns corresponding solaris error code.
889	* @param rc IPRT status code.
890	*/
891	static int VBoxSupDrvErr2SolarisErr(int rc)
892	{
893	switch (rc)
894	{
895	case VINF_SUCCESS: return 0;
896	case VERR_GENERAL_FAILURE: return EACCES;
897	case VERR_INVALID_PARAMETER: return EINVAL;
898	case VERR_INVALID_MAGIC: return EILSEQ;
899	case VERR_INVALID_HANDLE: return ENXIO;
900	case VERR_INVALID_POINTER: return EFAULT;
901	case VERR_LOCK_FAILED: return ENOLCK;
902	case VERR_ALREADY_LOADED: return EEXIST;
903	case VERR_PERMISSION_DENIED: return EPERM;
904	case VERR_VERSION_MISMATCH: return ENOSYS;
905	}
906
907	return EPERM;
908	}
909
910
911	void VBOXCALL supdrvOSCleanupSession(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession)
912	{
913	NOREF(pDevExt);
914	NOREF(pSession);
915	}
916
917
918	void VBOXCALL supdrvOSSessionHashTabInserted(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, void *pvUser)
919	{
920	NOREF(pDevExt); NOREF(pSession); NOREF(pvUser);
921	}
922
923
924	void VBOXCALL supdrvOSSessionHashTabRemoved(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, void *pvUser)
925	{
926	NOREF(pDevExt); NOREF(pSession); NOREF(pvUser);
927	}
928
929
930	/**
931	* Initializes any OS specific object creator fields.
932	*/
933	void VBOXCALL supdrvOSObjInitCreator(PSUPDRVOBJ pObj, PSUPDRVSESSION pSession)
934	{
935	NOREF(pObj);
936	NOREF(pSession);
937	}
938
939
940	/**
941	* Checks if the session can access the object.
942	*
943	* @returns true if a decision has been made.
944	* @returns false if the default access policy should be applied.
945	*
946	* @param pObj The object in question.
947	* @param pSession The session wanting to access the object.
948	* @param pszObjName The object name, can be NULL.
949	* @param prc Where to store the result when returning true.
950	*/
951	bool VBOXCALL supdrvOSObjCanAccess(PSUPDRVOBJ pObj, PSUPDRVSESSION pSession, const char pszObjName, int prc)
952	{
953	NOREF(pObj);
954	NOREF(pSession);
955	NOREF(pszObjName);
956	NOREF(prc);
957	return false;
958	}
959
960
961	bool VBOXCALL supdrvOSGetForcedAsyncTscMode(PSUPDRVDEVEXT pDevExt)
962	{
963	return false;
964	}
965
966
967	bool VBOXCALL supdrvOSAreTscDeltasInSync(void)
968	{
969	return false;
970	}
971
972
973	#if defined(VBOX_WITH_NATIVE_SOLARIS_LOADING) \
974	&& !defined(VBOX_WITHOUT_NATIVE_R0_LOADER)
975
976	int VBOXCALL supdrvOSLdrOpen(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage, const char *pszFilename)
977	{
978	pImage->idSolMod = -1;
979	pImage->pSolModCtl = NULL;
980
981	# if 1 /* This approach requires _init/_fini/_info stubs. */
982	/*
983	* Construct a filename that escapes the module search path and let us
984	* specify a root path.
985	*/
986	/** @todo change this to use modctl and use_path=0. */
987	const char *pszName = RTPathFilename(pszFilename);
988	AssertReturn(pszName, VERR_INVALID_PARAMETER);
989	char pszSubDir = RTStrAPrintf2("../../../../../../../../../../..%.s", pszName - pszFilename - 1, pszFilename);
990	if (!pszSubDir)
991	return VERR_NO_STR_MEMORY;
992	int idMod = modload(pszSubDir, pszName);
993	if (idMod == -1)
994	{
995	/* This is an horrible hack for avoiding the mod-present check in
996	modrload on S10. Fortunately, nobody else seems to be using that
997	variable... */
998	extern int swaploaded;
999	int saved_swaploaded = swaploaded;
1000	swaploaded = 0;
1001	idMod = modload(pszSubDir, pszName);
1002	swaploaded = saved_swaploaded;
1003	}
1004	RTStrFree(pszSubDir);
1005	if (idMod == -1)
1006	{
1007	LogRel(("modload(,%s): failed, could be anything...\n", pszFilename));
1008	return VERR_LDR_GENERAL_FAILURE;
1009	}
1010
1011	modctl_t *pModCtl = mod_hold_by_id(idMod);
1012	if (!pModCtl)
1013	{
1014	LogRel(("mod_hold_by_id(,%s): failed, weird.\n", pszFilename));
1015	/* No point in calling modunload. */
1016	return VERR_LDR_GENERAL_FAILURE;
1017	}
1018	pModCtl->mod_loadflags \|= MOD_NOAUTOUNLOAD \| MOD_NOUNLOAD; /* paranoia */
1019
1020	# else
1021
1022	const int idMod = -1;
1023	modctl_t *pModCtl = mod_hold_by_name(pszFilename);
1024	if (!pModCtl)
1025	{
1026	LogRel(("mod_hold_by_name failed for '%s'\n", pszFilename));
1027	return VERR_LDR_GENERAL_FAILURE;
1028	}
1029
1030	int rc = kobj_load_module(pModCtl, 0 /use_path/);
1031	if (rc != 0)
1032	{
1033	LogRel(("kobj_load_module failed with rc=%d for '%s'\n", rc, pszFilename));
1034	mod_release_mod(pModCtl);
1035	return RTErrConvertFromErrno(rc);
1036	}
1037	# endif
1038
1039	/*
1040	* Get the module info.
1041	*
1042	* Note! The text section is actually not at mi_base, but and the next
1043	* alignment boundrary and there seems to be no easy way of
1044	* getting at this address. This sabotages supdrvOSLdrLoad.
1045	* Bastards!
1046	*/
1047	struct modinfo ModInfo;
1048	kobj_getmodinfo(pModCtl->mod_mp, &ModInfo);
1049	pImage->pvImage = ModInfo.mi_base;
1050	pImage->idSolMod = idMod;
1051	pImage->pSolModCtl = pModCtl;
1052
1053	mod_release_mod(pImage->pSolModCtl);
1054	LogRel(("supdrvOSLdrOpen: succeeded for '%s' (mi_base=%p mi_size=%#x), id=%d ctl=%p\n",
1055	pszFilename, ModInfo.mi_base, ModInfo.mi_size, idMod, pModCtl));
1056	return VINF_SUCCESS;
1057	}
1058
1059
1060	void VBOXCALL supdrvOSLdrNotifyOpened(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage)
1061	{
1062	NOREF(pDevExt); NOREF(pImage);
1063	}
1064
1065
1066	int VBOXCALL supdrvOSLdrValidatePointer(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage, void pv, const uint8_t pbImageBits)
1067	{
1068	NOREF(pDevExt); NOREF(pImage); NOREF(pv); NOREF(pbImageBits);
1069	if (kobj_addrcheck(pImage->pSolModCtl->mod_mp, pv))
1070	return VERR_INVALID_PARAMETER;
1071	return VINF_SUCCESS;
1072	}
1073
1074
1075	/**
1076	* Resolves a module entry point address.
1077	*
1078	* @returns VBox status code.
1079	* @param pImage The image.
1080	* @param pszSymbol The symbol name.
1081	* @param ppvValue Where to store the value. On input this holds
1082	* the symbol value SUPLib calculated.
1083	*/
1084	static int supdrvSolLdrResolvEp(PSUPDRVLDRIMAGE pImage, const char pszSymbol, void *ppvValue)
1085	{
1086	/* Don't try resolve symbols which, according to SUPLib, aren't there. */
1087	if (!*ppvValue)
1088	return VINF_SUCCESS;
1089
1090	uintptr_t uValue = modlookup_by_modctl(pImage->pSolModCtl, pszSymbol);
1091	if (!uValue)
1092	{
1093	LogRel(("supdrvOSLdrLoad on %s failed to resolve %s\n", pImage->szName, pszSymbol));
1094	return VERR_SYMBOL_NOT_FOUND;
1095	}
1096	ppvValue = (void )uValue;
1097	return VINF_SUCCESS;
1098	}
1099
1100
1101	int VBOXCALL supdrvOSLdrLoad(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage, const uint8_t *pbImageBits, PSUPLDRLOAD pReq)
1102	{
1103	#if 0 /* This doesn't work because of text alignment. */
1104	/*
1105	* Comparing is very very difficult since text and data may be allocated
1106	* separately.
1107	*/
1108	size_t cbCompare = RT_MIN(pImage->cbImageBits, 64);
1109	if (memcmp(pImage->pvImage, pbImageBits, cbCompare))
1110	{
1111	LogRel(("Image mismatch: %s (%p)\n", pImage->szName, pImage->pvImage));
1112	LogRel(("Native: %.*Rhxs\n", cbCompare, pImage->pvImage));
1113	LogRel(("SUPLib: %.*Rhxs\n", cbCompare, pbImageBits));
1114	return VERR_LDR_MISMATCH_NATIVE;
1115	}
1116	#endif
1117
1118	/*
1119	* Get the exported symbol addresses.
1120	*/
1121	int rc;
1122	modctl_t *pModCtl = mod_hold_by_id(pImage->idSolMod);
1123	if (pModCtl && pModCtl == pImage->pSolModCtl)
1124	{
1125	uint32_t iSym = pImage->cSymbols;
1126	while (iSym-- > 0)
1127	{
1128	const char *pszSymbol = &pImage->pachStrTab[pImage->paSymbols[iSym].offName];
1129	uintptr_t uValue = modlookup_by_modctl(pImage->pSolModCtl, pszSymbol);
1130	if (!uValue)
1131	{
1132	LogRel(("supdrvOSLdrLoad on %s failed to resolve the exported symbol: '%s'\n", pImage->szName, pszSymbol));
1133	break;
1134	}
1135	uintptr_t offSymbol = uValue - (uintptr_t)pImage->pvImage;
1136	pImage->paSymbols[iSym].offSymbol = offSymbol;
1137	if (pImage->paSymbols[iSym].offSymbol != (int32_t)offSymbol)
1138	{
1139	LogRel(("supdrvOSLdrLoad on %s symbol out of range: %p (%s) \n", pImage->szName, offSymbol, pszSymbol));
1140	break;
1141	}
1142	}
1143
1144	rc = iSym == UINT32_MAX ? VINF_SUCCESS : VERR_LDR_GENERAL_FAILURE;
1145
1146	/*
1147	* Get the standard module entry points.
1148	*/
1149	if (RT_SUCCESS(rc))
1150	{
1151	rc = supdrvSolLdrResolvEp(pImage, "ModuleInit", (void **)&pImage->pfnModuleInit);
1152	if (RT_SUCCESS(rc))
1153	rc = supdrvSolLdrResolvEp(pImage, "ModuleTerm", (void **)&pImage->pfnModuleTerm);
1154
1155	switch (pReq->u.In.eEPType)
1156	{
1157	case SUPLDRLOADEP_VMMR0:
1158	{
1159	if (RT_SUCCESS(rc))
1160	rc = supdrvSolLdrResolvEp(pImage, "VMMR0EntryInt", (void **)&pReq->u.In.EP.VMMR0.pvVMMR0EntryInt);
1161	if (RT_SUCCESS(rc))
1162	rc = supdrvSolLdrResolvEp(pImage, "VMMR0EntryFast", (void **)&pReq->u.In.EP.VMMR0.pvVMMR0EntryFast);
1163	if (RT_SUCCESS(rc))
1164	rc = supdrvSolLdrResolvEp(pImage, "VMMR0EntryEx", (void **)&pReq->u.In.EP.VMMR0.pvVMMR0EntryEx);
1165	break;
1166	}
1167
1168	case SUPLDRLOADEP_SERVICE:
1169	{
1170	/** @todo we need the name of the entry point. */
1171	return VERR_NOT_SUPPORTED;
1172	}
1173	}
1174	}
1175
1176	mod_release_mod(pImage->pSolModCtl);
1177	}
1178	else
1179	{
1180	LogRel(("mod_hold_by_id failed in supdrvOSLdrLoad on %s: %p\n", pImage->szName, pModCtl));
1181	rc = VERR_LDR_MISMATCH_NATIVE;
1182	}
1183	return rc;
1184	}
1185
1186
1187	void VBOXCALL supdrvOSLdrUnload(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage)
1188	{
1189	# if 1
1190	pImage->pSolModCtl->mod_loadflags &= ~MOD_NOUNLOAD;
1191	int rc = modunload(pImage->idSolMod);
1192	if (rc)
1193	LogRel(("modunload(%u (%s)) failed: %d\n", pImage->idSolMod, pImage->szName, rc));
1194	# else
1195	kobj_unload_module(pImage->pSolModCtl);
1196	# endif
1197	pImage->pSolModCtl = NULL;
1198	pImage->idSolMod = NULL;
1199	}
1200
1201	#else /* !VBOX_WITH_NATIVE_SOLARIS_LOADING */
1202
1203	int VBOXCALL supdrvOSLdrOpen(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage, const char *pszFilename)
1204	{
1205	NOREF(pDevExt); NOREF(pImage); NOREF(pszFilename);
1206	return VERR_NOT_SUPPORTED;
1207	}
1208
1209
1210	void VBOXCALL supdrvOSLdrNotifyOpened(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage)
1211	{
1212	NOREF(pDevExt); NOREF(pImage);
1213	}
1214
1215
1216	int VBOXCALL supdrvOSLdrValidatePointer(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage, void pv, const uint8_t pbImageBits)
1217	{
1218	NOREF(pDevExt); NOREF(pImage); NOREF(pv); NOREF(pbImageBits);
1219	return VERR_NOT_SUPPORTED;
1220	}
1221
1222
1223	int VBOXCALL supdrvOSLdrLoad(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage, const uint8_t *pbImageBits, PSUPLDRLOAD pReq)
1224	{
1225	NOREF(pDevExt); NOREF(pImage); NOREF(pbImageBits); NOREF(pReq);
1226	return VERR_NOT_SUPPORTED;
1227	}
1228
1229
1230	void VBOXCALL supdrvOSLdrUnload(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage)
1231	{
1232	NOREF(pDevExt); NOREF(pImage);
1233	}
1234
1235	#endif /* !VBOX_WITH_NATIVE_SOLARIS_LOADING */
1236
1237
1238	#ifdef SUPDRV_WITH_MSR_PROBER
1239
1240	int VBOXCALL supdrvOSMsrProberRead(uint32_t uMsr, RTCPUID idCpu, uint64_t *puValue)
1241	{
1242	/** @todo cmi_hdl_rdmsr can safely do this. there is also the on_trap() fun
1243	* for catching traps that could possibly be used directly. */
1244	NOREF(uMsr); NOREF(idCpu); NOREF(puValue);
1245	return VERR_NOT_SUPPORTED;
1246	}
1247
1248
1249	int VBOXCALL supdrvOSMsrProberWrite(uint32_t uMsr, RTCPUID idCpu, uint64_t uValue)
1250	{
1251	/** @todo cmi_hdl_wrmsr can safely do this. */
1252	NOREF(uMsr); NOREF(idCpu); NOREF(uValue);
1253	return VERR_NOT_SUPPORTED;
1254	}
1255
1256
1257	int VBOXCALL supdrvOSMsrProberModify(RTCPUID idCpu, PSUPMSRPROBER pReq)
1258	{
1259	NOREF(idCpu); NOREF(pReq);
1260	return VERR_NOT_SUPPORTED;
1261	}
1262
1263	#endif /* SUPDRV_WITH_MSR_PROBER */
1264
1265
1266	RTDECL(int) SUPR0Printf(const char *pszFormat, ...)
1267	{
1268	va_list args;
1269	char szMsg[512];
1270
1271	/* cmn_err() acquires adaptive mutexes. Not preemption safe, see @bugref{6657}. */
1272	if (!RTThreadPreemptIsEnabled(NIL_RTTHREAD))
1273	return 0;
1274
1275	va_start(args, pszFormat);
1276	RTStrPrintfV(szMsg, sizeof(szMsg) - 1, pszFormat, args);
1277	va_end(args);
1278
1279	szMsg[sizeof(szMsg) - 1] = '\0';
1280	cmn_err(CE_CONT, "%s", szMsg);
1281	return 0;
1282	}
1283
1284
1285	/**
1286	* Returns configuration flags of the host kernel.
1287	*/
1288	SUPR0DECL(uint32_t) SUPR0GetKernelFeatures(void)
1289	{
1290	return 0;
1291	}
1292

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source: vbox/trunk/src/VBox/HostDrivers/Support/solaris/SUPDrv-solaris.c@ 54300

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