HGCMInternal.cpp@ 35517

Last change on this file since 35517 was 33540, checked in by vboxsync, 14 years ago
*: spelling fixes, thanks Timeless!
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1	/* $Revision: 33540 $ */
2	/** @file
3	* VBoxGuestLib - Host-Guest Communication Manager internal functions, implemented by VBoxGuest
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	/* Entire file is ifdef'ed with VBGL_VBOXGUEST */
28	#ifdef VBGL_VBOXGUEST
29
30	/*******************************************************************************
31	* Header Files *
32	*******************************************************************************/
33	#include "VBGLInternal.h"
34	#include <iprt/alloca.h>
35	#include <iprt/asm.h>
36	#include <iprt/assert.h>
37	#include <iprt/mem.h>
38	#include <iprt/memobj.h>
39	#include <iprt/string.h>
40	#include <iprt/thread.h>
41	#include <iprt/time.h>
42
43
44	/*******************************************************************************
45	* Defined Constants And Macros *
46	*******************************************************************************/
47	/** The max parameter buffer size for a user request. */
48	#define VBGLR0_MAX_HGCM_USER_PARM (24*_1M)
49	/** The max parameter buffer size for a kernel request. */
50	#define VBGLR0_MAX_HGCM_KERNEL_PARM (16*_1M)
51	#ifdef RT_OS_LINUX
52	/** Linux needs to use bounce buffers since RTR0MemObjLockUser has unwanted
53	* side effects. */
54	# define USE_BOUNCE_BUFFERS
55	#endif
56
57
58	/*******************************************************************************
59	* Structures and Typedefs *
60	*******************************************************************************/
61	/**
62	* Lock info structure used by VbglR0HGCMInternalCall and its helpers.
63	*/
64	struct VbglR0ParmInfo
65	{
66	uint32_t cLockBufs;
67	struct
68	{
69	uint32_t iParm;
70	RTR0MEMOBJ hObj;
71	#ifdef USE_BOUNCE_BUFFERS
72	void *pvSmallBuf;
73	#endif
74	} aLockBufs[10];
75	};
76
77
78
79	/* These functions can be only used by VBoxGuest. */
80
81	DECLVBGL(int) VbglR0HGCMInternalConnect (VBoxGuestHGCMConnectInfo *pConnectInfo,
82	PFNVBGLHGCMCALLBACK pfnAsyncCallback, void *pvAsyncData, uint32_t u32AsyncData)
83	{
84	VMMDevHGCMConnect *pHGCMConnect;
85	int rc;
86
87	if (!pConnectInfo \|\| !pfnAsyncCallback)
88	return VERR_INVALID_PARAMETER;
89
90	pHGCMConnect = NULL;
91
92	/* Allocate request */
93	rc = VbglGRAlloc ((VMMDevRequestHeader **)&pHGCMConnect, sizeof (VMMDevHGCMConnect), VMMDevReq_HGCMConnect);
94
95	if (RT_SUCCESS(rc))
96	{
97	/* Initialize request memory */
98	pHGCMConnect->header.fu32Flags = 0;
99
100	memcpy (&pHGCMConnect->loc, &pConnectInfo->Loc, sizeof (HGCMServiceLocation));
101	pHGCMConnect->u32ClientID = 0;
102
103	/* Issue request */
104	rc = VbglGRPerform (&pHGCMConnect->header.header);
105
106	if (RT_SUCCESS(rc))
107	{
108	/* Check if host decides to process the request asynchronously. */
109	if (rc == VINF_HGCM_ASYNC_EXECUTE)
110	{
111	/* Wait for request completion interrupt notification from host */
112	pfnAsyncCallback (&pHGCMConnect->header, pvAsyncData, u32AsyncData);
113	}
114
115	pConnectInfo->result = pHGCMConnect->header.result;
116
117	if (RT_SUCCESS (pConnectInfo->result))
118	pConnectInfo->u32ClientID = pHGCMConnect->u32ClientID;
119	}
120
121	VbglGRFree (&pHGCMConnect->header.header);
122	}
123
124	return rc;
125	}
126
127
128	DECLR0VBGL(int) VbglR0HGCMInternalDisconnect (VBoxGuestHGCMDisconnectInfo *pDisconnectInfo,
129	PFNVBGLHGCMCALLBACK pfnAsyncCallback, void *pvAsyncData, uint32_t u32AsyncData)
130	{
131	VMMDevHGCMDisconnect *pHGCMDisconnect;
132	int rc;
133
134	if (!pDisconnectInfo \|\| !pfnAsyncCallback)
135	return VERR_INVALID_PARAMETER;
136
137	pHGCMDisconnect = NULL;
138
139	/* Allocate request */
140	rc = VbglGRAlloc ((VMMDevRequestHeader **)&pHGCMDisconnect, sizeof (VMMDevHGCMDisconnect), VMMDevReq_HGCMDisconnect);
141
142	if (RT_SUCCESS(rc))
143	{
144	/* Initialize request memory */
145	pHGCMDisconnect->header.fu32Flags = 0;
146
147	pHGCMDisconnect->u32ClientID = pDisconnectInfo->u32ClientID;
148
149	/* Issue request */
150	rc = VbglGRPerform (&pHGCMDisconnect->header.header);
151
152	if (RT_SUCCESS(rc))
153	{
154	/* Check if host decides to process the request asynchronously. */
155	if (rc == VINF_HGCM_ASYNC_EXECUTE)
156	{
157	/* Wait for request completion interrupt notification from host */
158	pfnAsyncCallback (&pHGCMDisconnect->header, pvAsyncData, u32AsyncData);
159	}
160
161	pDisconnectInfo->result = pHGCMDisconnect->header.result;
162	}
163
164	VbglGRFree (&pHGCMDisconnect->header.header);
165	}
166
167	return rc;
168	}
169
170
171	/**
172	* Preprocesses the HGCM call, validating and locking/buffering parameters.
173	*
174	* @returns VBox status code.
175	*
176	* @param pCallInfo The call info.
177	* @param cbCallInfo The size of the call info structure.
178	* @param fIsUser Is it a user request or kernel request.
179	* @param pcbExtra Where to return the extra request space needed for
180	* physical page lists.
181	*/
182	static int vbglR0HGCMInternalPreprocessCall(VBoxGuestHGCMCallInfo const *pCallInfo, uint32_t cbCallInfo,
183	bool fIsUser, struct VbglR0ParmInfo pParmInfo, size_t pcbExtra)
184	{
185	HGCMFunctionParameter const *pSrcParm = VBOXGUEST_HGCM_CALL_PARMS(pCallInfo);
186	uint32_t cParms = pCallInfo->cParms;
187	uint32_t iParm;
188	uint32_t cb;
189
190	/*
191	* Lock down the any linear buffers so we can get their addresses
192	* and figure out how much extra storage we need for page lists.
193	*
194	* Note! With kernel mode users we can be assertive. For user mode users
195	* we should just (debug) log it and fail without any fanfare.
196	*/
197	*pcbExtra = 0;
198	pParmInfo->cLockBufs = 0;
199	for (iParm = 0; iParm < cParms; iParm++, pSrcParm++)
200	{
201	switch (pSrcParm->type)
202	{
203	case VMMDevHGCMParmType_32bit:
204	Log4(("GstHGCMCall: parm=%u type=32bit: %#010x\n", iParm, pSrcParm->u.value32));
205	break;
206
207	case VMMDevHGCMParmType_64bit:
208	Log4(("GstHGCMCall: parm=%u type=64bit: %#018x\n", iParm, pSrcParm->u.value64));
209	break;
210
211	case VMMDevHGCMParmType_PageList:
212	if (fIsUser)
213	return VERR_INVALID_PARAMETER;
214	cb = pSrcParm->u.PageList.size;
215	if (cb)
216	{
217	uint32_t off = pSrcParm->u.PageList.offset;
218	HGCMPageListInfo *pPgLst;
219	uint32_t cPages;
220	uint32_t u32;
221
222	AssertMsgReturn(cb <= VBGLR0_MAX_HGCM_KERNEL_PARM, ("%#x > %#x\n", cb, VBGLR0_MAX_HGCM_KERNEL_PARM),
223	VERR_OUT_OF_RANGE);
224	AssertMsgReturn( off >= pCallInfo->cParms * sizeof(HGCMFunctionParameter)
225	&& off <= cbCallInfo - sizeof(HGCMPageListInfo),
226	("offset=%#x cParms=%#x cbCallInfo=%#x\n", off, pCallInfo->cParms, cbCallInfo),
227	VERR_INVALID_PARAMETER);
228
229	pPgLst = (HGCMPageListInfo )((uint8_t )pCallInfo + off);
230	cPages = pPgLst->cPages;
231	u32 = RT_OFFSETOF(HGCMPageListInfo, aPages[cPages]) + off;
232	AssertMsgReturn(u32 <= cbCallInfo,
233	("u32=%#x (cPages=%#x offset=%#x) cbCallInfo=%#x\n", u32, cPages, off, cbCallInfo),
234	VERR_INVALID_PARAMETER);
235	AssertMsgReturn(pPgLst->offFirstPage < PAGE_SIZE, ("#x\n", pPgLst->offFirstPage), VERR_INVALID_PARAMETER);
236	u32 = RT_ALIGN_32(pPgLst->offFirstPage + cb, PAGE_SIZE) >> PAGE_SHIFT;
237	AssertMsgReturn(cPages == u32, ("cPages=%#x u32=%#x\n", cPages, u32), VERR_INVALID_PARAMETER);
238	AssertMsgReturn(VBOX_HGCM_F_PARM_ARE_VALID(pPgLst->flags), ("%#x\n", pPgLst->flags), VERR_INVALID_PARAMETER);
239	Log4(("GstHGCMCall: parm=%u type=pglst: cb=%#010x cPgs=%u offPg0=%#x flags=%#x\n",
240	iParm, cb, cPages, pPgLst->offFirstPage, pPgLst->flags));
241	u32 = cPages;
242	while (u32-- > 0)
243	{
244	Log4(("GstHGCMCall: pg#%u=%RHp\n", u32, pPgLst->aPages[u32]));
245	AssertMsgReturn(!(pPgLst->aPages[u32] & (PAGE_OFFSET_MASK \| UINT64_C(0xfff0000000000000))),
246	("pg#%u=%RHp\n", u32, pPgLst->aPages[u32]),
247	VERR_INVALID_PARAMETER);
248	}
249
250	*pcbExtra += RT_OFFSETOF(HGCMPageListInfo, aPages[pPgLst->cPages]);
251	}
252	else
253	Log4(("GstHGCMCall: parm=%u type=pglst: cb=0\n", iParm));
254	break;
255
256	case VMMDevHGCMParmType_LinAddr_Locked_In:
257	case VMMDevHGCMParmType_LinAddr_Locked_Out:
258	case VMMDevHGCMParmType_LinAddr_Locked:
259	if (fIsUser)
260	return VERR_INVALID_PARAMETER;
261	if (!VBGLR0_CAN_USE_PHYS_PAGE_LIST())
262	{
263	cb = pSrcParm->u.Pointer.size;
264	AssertMsgReturn(cb <= VBGLR0_MAX_HGCM_KERNEL_PARM, ("%#x > %#x\n", cb, VBGLR0_MAX_HGCM_KERNEL_PARM),
265	VERR_OUT_OF_RANGE);
266	if (cb != 0)
267	Log4(("GstHGCMCall: parm=%u type=%#x: cb=%#010x pv=%p\n",
268	iParm, pSrcParm->type, cb, pSrcParm->u.Pointer.u.linearAddr));
269	else
270	Log4(("GstHGCMCall: parm=%u type=%#x: cb=0\n", iParm, pSrcParm->type));
271	break;
272	}
273	/* fall thru */
274
275	case VMMDevHGCMParmType_LinAddr_In:
276	case VMMDevHGCMParmType_LinAddr_Out:
277	case VMMDevHGCMParmType_LinAddr:
278	cb = pSrcParm->u.Pointer.size;
279	if (cb != 0)
280	{
281	#ifdef USE_BOUNCE_BUFFERS
282	void *pvSmallBuf = NULL;
283	#endif
284	uint32_t iLockBuf = pParmInfo->cLockBufs;
285	RTR0MEMOBJ hObj;
286	int rc;
287	uint32_t fAccess = pSrcParm->type == VMMDevHGCMParmType_LinAddr_In
288	\|\| pSrcParm->type == VMMDevHGCMParmType_LinAddr_Locked_In
289	? RTMEM_PROT_READ
290	: RTMEM_PROT_READ \| RTMEM_PROT_WRITE;
291
292	AssertReturn(iLockBuf < RT_ELEMENTS(pParmInfo->aLockBufs), VERR_INVALID_PARAMETER);
293	if (!fIsUser)
294	{
295	AssertMsgReturn(cb <= VBGLR0_MAX_HGCM_KERNEL_PARM, ("%#x > %#x\n", cb, VBGLR0_MAX_HGCM_KERNEL_PARM),
296	VERR_OUT_OF_RANGE);
297	rc = RTR0MemObjLockKernel(&hObj, (void *)pSrcParm->u.Pointer.u.linearAddr, cb, fAccess);
298	if (RT_FAILURE(rc))
299	{
300	Log(("GstHGCMCall: id=%#x fn=%u parm=%u RTR0MemObjLockKernel(,%p,%#x) -> %Rrc\n",
301	pCallInfo->u32ClientID, pCallInfo->u32Function, iParm, pSrcParm->u.Pointer.u.linearAddr, cb, rc));
302	return rc;
303	}
304	Log3(("GstHGCMCall: parm=%u type=%#x: cb=%#010x pv=%p locked kernel -> %p\n",
305	iParm, pSrcParm->type, cb, pSrcParm->u.Pointer.u.linearAddr, hObj));
306	}
307	else if (cb > VBGLR0_MAX_HGCM_USER_PARM)
308	{
309	Log(("GstHGCMCall: id=%#x fn=%u parm=%u pv=%p cb=%#x > %#x -> out of range\n",
310	pCallInfo->u32ClientID, pCallInfo->u32Function, iParm, pSrcParm->u.Pointer.u.linearAddr,
311	cb, VBGLR0_MAX_HGCM_USER_PARM));
312	return VERR_OUT_OF_RANGE;
313	}
314	else
315	{
316	#ifndef USE_BOUNCE_BUFFERS
317	rc = RTR0MemObjLockUser(&hObj, (RTR3PTR)pSrcParm->u.Pointer.u.linearAddr, cb, fAccess, NIL_RTR0PROCESS);
318	if (RT_FAILURE(rc))
319	{
320	Log(("GstHGCMCall: id=%#x fn=%u parm=%u RTR0MemObjLockUser(,%p,%#x,nil) -> %Rrc\n",
321	pCallInfo->u32ClientID, pCallInfo->u32Function, iParm, pSrcParm->u.Pointer.u.linearAddr, cb, rc));
322	return rc;
323	}
324	Log3(("GstHGCMCall: parm=%u type=%#x: cb=%#010x pv=%p locked user -> %p\n",
325	iParm, pSrcParm->type, cb, pSrcParm->u.Pointer.u.linearAddr, hObj));
326
327	#else /* USE_BOUNCE_BUFFERS */
328	/*
329	* This is a bit massive, but we don't want to waste a
330	* whole page for a 3 byte string buffer (guest props).
331	*
332	* The threshold is ASSUMING sizeof(RTMEMHDR) == 16 and
333	* the system is using some power of two allocator.
334	*/
335	/** @todo A more efficient strategy would be to combine buffers. However it
336	* is probably going to be more massive than the current code, so
337	* it can wait till later. */
338	bool fCopyIn = pSrcParm->type != VMMDevHGCMParmType_LinAddr_Out
339	&& pSrcParm->type != VMMDevHGCMParmType_LinAddr_Locked_Out;
340	if (cb <= PAGE_SIZE / 2 - 16)
341	{
342	pvSmallBuf = fCopyIn ? RTMemTmpAlloc(cb) : RTMemTmpAllocZ(cb);
343	if (RT_UNLIKELY(!pvSmallBuf))
344	return VERR_NO_MEMORY;
345	if (fCopyIn)
346	{
347	rc = RTR0MemUserCopyFrom(pvSmallBuf, pSrcParm->u.Pointer.u.linearAddr, cb);
348	if (RT_FAILURE(rc))
349	{
350	RTMemTmpFree(pvSmallBuf);
351	Log(("GstHGCMCall: id=%#x fn=%u parm=%u RTR0MemUserCopyFrom(,%p,%#x) -> %Rrc\n",
352	pCallInfo->u32ClientID, pCallInfo->u32Function, iParm,
353	pSrcParm->u.Pointer.u.linearAddr, cb, rc));
354	return rc;
355	}
356	}
357	rc = RTR0MemObjLockKernel(&hObj, pvSmallBuf, cb, fAccess);
358	if (RT_FAILURE(rc))
359	{
360	RTMemTmpFree(pvSmallBuf);
361	Log(("GstHGCMCall: RTR0MemObjLockKernel failed for small buffer: rc=%Rrc pvSmallBuf=%p cb=%#x\n",
362	rc, pvSmallBuf, cb));
363	return rc;
364	}
365	Log3(("GstHGCMCall: parm=%u type=%#x: cb=%#010x pv=%p small buffer %p -> %p\n",
366	iParm, pSrcParm->type, cb, pSrcParm->u.Pointer.u.linearAddr, pvSmallBuf, hObj));
367	}
368	else
369	{
370	rc = RTR0MemObjAllocPage(&hObj, cb, false /fExecutable/);
371	if (RT_FAILURE(rc))
372	return rc;
373	if (!fCopyIn)
374	memset(RTR0MemObjAddress(hObj), '\0', cb);
375	else
376	{
377	rc = RTR0MemUserCopyFrom(RTR0MemObjAddress(hObj), pSrcParm->u.Pointer.u.linearAddr, cb);
378	if (RT_FAILURE(rc))
379	{
380	RTR0MemObjFree(hObj, false /fFreeMappings/);
381	Log(("GstHGCMCall: id=%#x fn=%u parm=%u RTR0MemUserCopyFrom(,%p,%#x) -> %Rrc\n",
382	pCallInfo->u32ClientID, pCallInfo->u32Function, iParm,
383	pSrcParm->u.Pointer.u.linearAddr, cb, rc));
384	return rc;
385	}
386	}
387	Log3(("GstHGCMCall: parm=%u type=%#x: cb=%#010x pv=%p big buffer -> %p\n",
388	iParm, pSrcParm->type, cb, pSrcParm->u.Pointer.u.linearAddr, hObj));
389	}
390	#endif /* USE_BOUNCE_BUFFERS */
391	}
392
393	pParmInfo->aLockBufs[iLockBuf].iParm = iParm;
394	pParmInfo->aLockBufs[iLockBuf].hObj = hObj;
395	#ifdef USE_BOUNCE_BUFFERS
396	pParmInfo->aLockBufs[iLockBuf].pvSmallBuf = pvSmallBuf;
397	#endif
398	pParmInfo->cLockBufs = iLockBuf + 1;
399
400	if (VBGLR0_CAN_USE_PHYS_PAGE_LIST())
401	{
402	size_t cPages = RTR0MemObjSize(hObj);
403	*pcbExtra += RT_OFFSETOF(HGCMPageListInfo, aPages[cPages]);
404	}
405	}
406	else
407	Log4(("GstHGCMCall: parm=%u type=%#x: cb=0\n", iParm, pSrcParm->type));
408	break;
409
410	default:
411	return VERR_INVALID_PARAMETER;
412	}
413	}
414
415	return VINF_SUCCESS;
416	}
417
418
419	/**
420	* Translates locked linear address to the normal type.
421	* The locked types are only for the guest side and not handled by the host.
422	*
423	* @returns normal linear address type.
424	* @param enmType The type.
425	*/
426	static HGCMFunctionParameterType vbglR0HGCMInternalConvertLinAddrType(HGCMFunctionParameterType enmType)
427	{
428	switch (enmType)
429	{
430	case VMMDevHGCMParmType_LinAddr_Locked_In:
431	return VMMDevHGCMParmType_LinAddr_In;
432	case VMMDevHGCMParmType_LinAddr_Locked_Out:
433	return VMMDevHGCMParmType_LinAddr_Out;
434	case VMMDevHGCMParmType_LinAddr_Locked:
435	return VMMDevHGCMParmType_LinAddr;
436	default:
437	return enmType;
438	}
439	}
440
441
442	/**
443	* Translates linear address types to page list direction flags.
444	*
445	* @returns page list flags.
446	* @param enmType The type.
447	*/
448	static uint32_t vbglR0HGCMInternalLinAddrTypeToPageListFlags(HGCMFunctionParameterType enmType)
449	{
450	switch (enmType)
451	{
452	case VMMDevHGCMParmType_LinAddr_In:
453	case VMMDevHGCMParmType_LinAddr_Locked_In:
454	return VBOX_HGCM_F_PARM_DIRECTION_TO_HOST;
455
456	case VMMDevHGCMParmType_LinAddr_Out:
457	case VMMDevHGCMParmType_LinAddr_Locked_Out:
458	return VBOX_HGCM_F_PARM_DIRECTION_FROM_HOST;
459
460	default: AssertFailed();
461	case VMMDevHGCMParmType_LinAddr:
462	case VMMDevHGCMParmType_LinAddr_Locked:
463	return VBOX_HGCM_F_PARM_DIRECTION_BOTH;
464	}
465	}
466
467
468	/**
469	* Initializes the call request that we're sending to the host.
470	*
471	* @returns VBox status code.
472	*
473	* @param pCallInfo The call info.
474	* @param cbCallInfo The size of the call info structure.
475	* @param fIsUser Is it a user request or kernel request.
476	* @param pcbExtra Where to return the extra request space needed for
477	* physical page lists.
478	*/
479	static void vbglR0HGCMInternalInitCall(VMMDevHGCMCall pHGCMCall, VBoxGuestHGCMCallInfo const pCallInfo,
480	uint32_t cbCallInfo, bool fIsUser, struct VbglR0ParmInfo *pParmInfo)
481	{
482	HGCMFunctionParameter const *pSrcParm = VBOXGUEST_HGCM_CALL_PARMS(pCallInfo);
483	HGCMFunctionParameter *pDstParm = VMMDEV_HGCM_CALL_PARMS(pHGCMCall);
484	uint32_t cParms = pCallInfo->cParms;
485	uint32_t offExtra = (uintptr_t)(pDstParm + cParms) - (uintptr_t)pHGCMCall;
486	uint32_t iLockBuf = 0;
487	uint32_t iParm;
488
489
490	/*
491	* The call request headers.
492	*/
493	pHGCMCall->header.fu32Flags = 0;
494	pHGCMCall->header.result = VINF_SUCCESS;
495
496	pHGCMCall->u32ClientID = pCallInfo->u32ClientID;
497	pHGCMCall->u32Function = pCallInfo->u32Function;
498	pHGCMCall->cParms = cParms;
499
500	/*
501	* The parameters.
502	*/
503	for (iParm = 0; iParm < pCallInfo->cParms; iParm++, pSrcParm++, pDstParm++)
504	{
505	switch (pSrcParm->type)
506	{
507	case VMMDevHGCMParmType_32bit:
508	case VMMDevHGCMParmType_64bit:
509	pDstParm = pSrcParm;
510	break;
511
512	case VMMDevHGCMParmType_PageList:
513	pDstParm->type = VMMDevHGCMParmType_PageList;
514	pDstParm->u.PageList.size = pSrcParm->u.PageList.size;
515	if (pSrcParm->u.PageList.size)
516	{
517	HGCMPageListInfo const pSrcPgLst = (HGCMPageListInfo )((uint8_t *)pCallInfo + pSrcParm->u.PageList.offset);
518	HGCMPageListInfo pDstPgLst = (HGCMPageListInfo )((uint8_t *)pHGCMCall + offExtra);
519	uint32_t const cPages = pSrcPgLst->cPages;
520	uint32_t iPage;
521
522	pDstParm->u.PageList.offset = offExtra;
523	pDstPgLst->flags = pSrcPgLst->flags;
524	pDstPgLst->offFirstPage = pSrcPgLst->offFirstPage;
525	pDstPgLst->cPages = cPages;
526	for (iPage = 0; iPage < cPages; iPage++)
527	pDstPgLst->aPages[iPage] = pSrcPgLst->aPages[iPage];
528
529	offExtra += RT_OFFSETOF(HGCMPageListInfo, aPages[cPages]);
530	}
531	else
532	pDstParm->u.PageList.offset = 0;
533	break;
534
535	case VMMDevHGCMParmType_LinAddr_Locked_In:
536	case VMMDevHGCMParmType_LinAddr_Locked_Out:
537	case VMMDevHGCMParmType_LinAddr_Locked:
538	if (!VBGLR0_CAN_USE_PHYS_PAGE_LIST())
539	{
540	pDstParm = pSrcParm;
541	pDstParm->type = vbglR0HGCMInternalConvertLinAddrType(pSrcParm->type);
542	break;
543	}
544	/* fall thru */
545
546	case VMMDevHGCMParmType_LinAddr_In:
547	case VMMDevHGCMParmType_LinAddr_Out:
548	case VMMDevHGCMParmType_LinAddr:
549	if (pSrcParm->u.Pointer.size != 0)
550	{
551	#ifdef USE_BOUNCE_BUFFERS
552	void *pvSmallBuf = pParmInfo->aLockBufs[iLockBuf].pvSmallBuf;
553	#endif
554	RTR0MEMOBJ hObj = pParmInfo->aLockBufs[iLockBuf].hObj;
555	Assert(iParm == pParmInfo->aLockBufs[iLockBuf].iParm);
556
557	if (VBGLR0_CAN_USE_PHYS_PAGE_LIST())
558	{
559	HGCMPageListInfo pDstPgLst = (HGCMPageListInfo )((uint8_t *)pHGCMCall + offExtra);
560	size_t const cPages = RTR0MemObjSize(hObj) >> PAGE_SHIFT;
561	size_t iPage;
562
563	pDstParm->type = VMMDevHGCMParmType_PageList;
564	pDstParm->u.PageList.size = pSrcParm->u.Pointer.size;
565	pDstParm->u.PageList.offset = offExtra;
566	pDstPgLst->flags = vbglR0HGCMInternalLinAddrTypeToPageListFlags(pSrcParm->type);
567	#ifdef USE_BOUNCE_BUFFERS
568	if (fIsUser)
569	pDstPgLst->offFirstPage = (uintptr_t)pvSmallBuf & PAGE_OFFSET_MASK;
570	else
571	#endif
572	pDstPgLst->offFirstPage = pSrcParm->u.Pointer.u.linearAddr & PAGE_OFFSET_MASK;
573	pDstPgLst->cPages = cPages; Assert(pDstPgLst->cPages == cPages);
574	for (iPage = 0; iPage < cPages; iPage++)
575	{
576	pDstPgLst->aPages[iPage] = RTR0MemObjGetPagePhysAddr(hObj, iPage);
577	Assert(pDstPgLst->aPages[iPage] != NIL_RTHCPHYS);
578	}
579
580	offExtra += RT_OFFSETOF(HGCMPageListInfo, aPages[cPages]);
581	}
582	else
583	{
584	pDstParm->type = vbglR0HGCMInternalConvertLinAddrType(pSrcParm->type);
585	pDstParm->u.Pointer.size = pSrcParm->u.Pointer.size;
586	#ifdef USE_BOUNCE_BUFFERS
587	if (fIsUser)
588	pDstParm->u.Pointer.u.linearAddr = pvSmallBuf
589	? (uintptr_t)pvSmallBuf
590	: (uintptr_t)RTR0MemObjAddress(hObj);
591	else
592	#endif
593	pDstParm->u.Pointer.u.linearAddr = pSrcParm->u.Pointer.u.linearAddr;
594	}
595	iLockBuf++;
596	}
597	else
598	{
599	pDstParm->type = vbglR0HGCMInternalConvertLinAddrType(pSrcParm->type);
600	pDstParm->u.Pointer.size = 0;
601	pDstParm->u.Pointer.u.linearAddr = 0;
602	}
603	break;
604
605	default:
606	AssertFailed();
607	pDstParm->type = VMMDevHGCMParmType_Invalid;
608	break;
609	}
610	}
611	}
612
613
614	/**
615	* Performs the call and completion wait.
616	*
617	* @returns VBox status code of this operation, not necessarily the call.
618	*
619	* @param pHGCMCall The HGCM call info.
620	* @param pfnAsyncCallback The async callback that will wait for the call
621	* to complete.
622	* @param pvAsyncData Argument for the callback.
623	* @param u32AsyncData Argument for the callback.
624	* @param pfLeakIt Where to return the leak it / free it,
625	* indicator. Cancellation fun.
626	*/
627	static int vbglR0HGCMInternalDoCall(VMMDevHGCMCall *pHGCMCall, PFNVBGLHGCMCALLBACK pfnAsyncCallback,
628	void pvAsyncData, uint32_t u32AsyncData, bool pfLeakIt)
629	{
630	int rc;
631
632	Log(("calling VbglGRPerform\n"));
633	rc = VbglGRPerform(&pHGCMCall->header.header);
634	Log(("VbglGRPerform rc = %Rrc (header rc=%d)\n", rc, pHGCMCall->header.result));
635
636	/*
637	* If the call failed, but as a result of the request itself, then pretend
638	* success. Upper layers will interpret the result code in the packet.
639	*/
640	if ( RT_FAILURE(rc)
641	&& rc == pHGCMCall->header.result)
642	{
643	Assert(pHGCMCall->header.fu32Flags & VBOX_HGCM_REQ_DONE);
644	rc = VINF_SUCCESS;
645	}
646
647	/*
648	* Check if host decides to process the request asynchronously,
649	* if so, we wait for it to complete using the caller supplied callback.
650	*/
651	*pfLeakIt = false;
652	if (rc == VINF_HGCM_ASYNC_EXECUTE)
653	{
654	Log(("Processing HGCM call asynchronously\n"));
655	rc = pfnAsyncCallback(&pHGCMCall->header, pvAsyncData, u32AsyncData);
656	if (pHGCMCall->header.fu32Flags & VBOX_HGCM_REQ_DONE)
657	{
658	Assert(!(pHGCMCall->header.fu32Flags & VBOX_HGCM_REQ_CANCELLED));
659	rc = VINF_SUCCESS;
660	}
661	else
662	{
663	/*
664	* The request didn't complete in time or the call was interrupted,
665	* the RC from the callback indicates which. Try cancel the request.
666	*
667	* This is a bit messy because we're racing request completion. Sorry.
668	*/
669	/** @todo It would be nice if we could use the waiter callback to do further
670	* waiting in case of a completion race. If it wasn't for WINNT having its own
671	* version of all that stuff, I would've done it already. */
672	VMMDevHGCMCancel2 *pCancelReq;
673	int rc2 = VbglGRAlloc((VMMDevRequestHeader *)&pCancelReq, sizeof(pCancelReq), VMMDevReq_HGCMCancel2);
674	if (RT_SUCCESS(rc2))
675	{
676	pCancelReq->physReqToCancel = VbglPhysHeapGetPhysAddr(pHGCMCall);
677	rc2 = VbglGRPerform(&pCancelReq->header);
678	VbglGRFree(&pCancelReq->header);
679	}
680	#if 1 /** @todo ADDVER: Remove this on next minor version change. */
681	if (rc2 == VERR_NOT_IMPLEMENTED)
682	{
683	/* host is too old, or we're out of heap. */
684	pHGCMCall->header.fu32Flags \|= VBOX_HGCM_REQ_CANCELLED;
685	pHGCMCall->header.header.requestType = VMMDevReq_HGCMCancel;
686	rc2 = VbglGRPerform(&pHGCMCall->header.header);
687	if (rc2 == VERR_INVALID_PARAMETER)
688	rc2 = VERR_NOT_FOUND;
689	else if (RT_SUCCESS(rc))
690	RTThreadSleep(1);
691	}
692	#endif
693	if (RT_SUCCESS(rc)) rc = VERR_INTERRUPTED; /** @todo weed this out from the WINNT VBoxGuest code. */
694	if (RT_SUCCESS(rc2))
695	{
696	Log(("vbglR0HGCMInternalDoCall: successfully cancelled\n"));
697	pHGCMCall->header.fu32Flags \|= VBOX_HGCM_REQ_CANCELLED;
698	}
699	else
700	{
701	/*
702	* Wait for a bit while the host (hopefully) completes it.
703	*/
704	uint64_t u64Start = RTTimeSystemMilliTS();
705	uint32_t cMilliesToWait = rc2 == VERR_NOT_FOUND \|\| rc2 == VERR_SEM_DESTROYED ? 500 : 2000;
706	uint64_t cElapsed = 0;
707	if (rc2 != VERR_NOT_FOUND)
708	{
709	static unsigned s_cErrors = 0;
710	if (s_cErrors++ < 32)
711	LogRel(("vbglR0HGCMInternalDoCall: Failed to cancel the HGCM call on %Rrc: rc2=%Rrc\n", rc, rc2));
712	}
713	else
714	Log(("vbglR0HGCMInternalDoCall: Cancel race rc=%Rrc rc2=%Rrc\n", rc, rc2));
715
716	do
717	{
718	ASMCompilerBarrier(); /* paranoia */
719	if (pHGCMCall->header.fu32Flags & VBOX_HGCM_REQ_DONE)
720	break;
721	RTThreadSleep(1);
722	cElapsed = RTTimeSystemMilliTS() - u64Start;
723	} while (cElapsed < cMilliesToWait);
724
725	ASMCompilerBarrier(); /* paranoia^2 */
726	if (pHGCMCall->header.fu32Flags & VBOX_HGCM_REQ_DONE)
727	rc = VINF_SUCCESS;
728	else
729	{
730	LogRel(("vbglR0HGCMInternalDoCall: Leaking %u bytes. Pending call to %u with %u parms. (rc2=%Rrc)\n",
731	pHGCMCall->header.header.size, pHGCMCall->u32Function, pHGCMCall->cParms, rc2));
732	*pfLeakIt = true;
733	}
734	Log(("vbglR0HGCMInternalDoCall: Cancel race ended with rc=%Rrc (rc2=%Rrc) after %llu ms\n", rc, rc2, cElapsed));
735	}
736	}
737	}
738
739	Log(("GstHGCMCall: rc=%Rrc result=%Rrc fu32Flags=%#x fLeakIt=%d\n",
740	rc, pHGCMCall->header.result, pHGCMCall->header.fu32Flags, *pfLeakIt));
741	return rc;
742	}
743
744
745	/**
746	* Copies the result of the call back to the caller info structure and user
747	* buffers (if using bounce buffers).
748	*
749	* @returns rc, unless RTR0MemUserCopyTo fails.
750	* @param pCallInfo Call info structure to update.
751	* @param pHGCMCall HGCM call request.
752	* @param pParmInfo Parameter locking/buffering info.
753	* @param fIsUser Is it a user (true) or kernel request.
754	* @param rc The current result code. Passed along to
755	* preserve informational status codes.
756	*/
757	static int vbglR0HGCMInternalCopyBackResult(VBoxGuestHGCMCallInfo pCallInfo, VMMDevHGCMCall const pHGCMCall,
758	struct VbglR0ParmInfo *pParmInfo, bool fIsUser, int rc)
759	{
760	HGCMFunctionParameter const *pSrcParm = VMMDEV_HGCM_CALL_PARMS(pHGCMCall);
761	HGCMFunctionParameter *pDstParm = VBOXGUEST_HGCM_CALL_PARMS(pCallInfo);
762	uint32_t cParms = pCallInfo->cParms;
763	#ifdef USE_BOUNCE_BUFFERS
764	uint32_t iLockBuf = 0;
765	#endif
766	uint32_t iParm;
767
768	/*
769	* The call result.
770	*/
771	pCallInfo->result = pHGCMCall->header.result;
772
773	/*
774	* Copy back parameters.
775	*/
776	for (iParm = 0; iParm < cParms; iParm++, pSrcParm++, pDstParm++)
777	{
778	switch (pDstParm->type)
779	{
780	case VMMDevHGCMParmType_32bit:
781	case VMMDevHGCMParmType_64bit:
782	pDstParm = pSrcParm;
783	break;
784
785	case VMMDevHGCMParmType_PageList:
786	pDstParm->u.PageList.size = pSrcParm->u.PageList.size;
787	break;
788
789	case VMMDevHGCMParmType_LinAddr_Locked_In:
790	case VMMDevHGCMParmType_LinAddr_In:
791	#ifdef USE_BOUNCE_BUFFERS
792	if ( fIsUser
793	&& iLockBuf < pParmInfo->cLockBufs
794	&& iParm == pParmInfo->aLockBufs[iLockBuf].iParm)
795	iLockBuf++;
796	#endif
797	pDstParm->u.Pointer.size = pSrcParm->u.Pointer.size;
798	break;
799
800	case VMMDevHGCMParmType_LinAddr_Locked_Out:
801	case VMMDevHGCMParmType_LinAddr_Locked:
802	if (!VBGLR0_CAN_USE_PHYS_PAGE_LIST())
803	{
804	pDstParm->u.Pointer.size = pSrcParm->u.Pointer.size;
805	break;
806	}
807	/* fall thru */
808
809	case VMMDevHGCMParmType_LinAddr_Out:
810	case VMMDevHGCMParmType_LinAddr:
811	{
812	#ifdef USE_BOUNCE_BUFFERS
813	if (fIsUser)
814	{
815	size_t cbOut = RT_MIN(pSrcParm->u.Pointer.size, pDstParm->u.Pointer.size);
816	if (cbOut)
817	{
818	int rc2;
819	Assert(pParmInfo->aLockBufs[iLockBuf].iParm == iParm);
820	rc2 = RTR0MemUserCopyTo((RTR3PTR)pDstParm->u.Pointer.u.linearAddr,
821	pParmInfo->aLockBufs[iLockBuf].pvSmallBuf
822	? pParmInfo->aLockBufs[iLockBuf].pvSmallBuf
823	: RTR0MemObjAddress(pParmInfo->aLockBufs[iLockBuf].hObj),
824	cbOut);
825	if (RT_FAILURE(rc2))
826	return rc2;
827	iLockBuf++;
828	}
829	else if ( iLockBuf < pParmInfo->cLockBufs
830	&& iParm == pParmInfo->aLockBufs[iLockBuf].iParm)
831	iLockBuf++;
832	}
833	#endif
834	pDstParm->u.Pointer.size = pSrcParm->u.Pointer.size;
835	break;
836	}
837
838	default:
839	AssertFailed();
840	rc = VERR_INTERNAL_ERROR_4;
841	break;
842	}
843	}
844
845	#ifdef USE_BOUNCE_BUFFERS
846	Assert(!fIsUser \|\| pParmInfo->cLockBufs == iLockBuf);
847	#endif
848	return rc;
849	}
850
851
852	DECLR0VBGL(int) VbglR0HGCMInternalCall(VBoxGuestHGCMCallInfo *pCallInfo, uint32_t cbCallInfo, uint32_t fFlags,
853	PFNVBGLHGCMCALLBACK pfnAsyncCallback, void *pvAsyncData, uint32_t u32AsyncData)
854	{
855	bool fIsUser = (fFlags & VBGLR0_HGCMCALL_F_MODE_MASK) == VBGLR0_HGCMCALL_F_USER;
856	struct VbglR0ParmInfo ParmInfo;
857	size_t cbExtra;
858	int rc;
859
860	/*
861	* Basic validation.
862	*/
863	AssertMsgReturn( !pCallInfo
864	\|\| !pfnAsyncCallback
865	\|\| pCallInfo->cParms > VBOX_HGCM_MAX_PARMS
866	\|\| !(fFlags & ~VBGLR0_HGCMCALL_F_MODE_MASK),
867	("pCallInfo=%p pfnAsyncCallback=%p fFlags=%#x\n", pCallInfo, pfnAsyncCallback, fFlags),
868	VERR_INVALID_PARAMETER);
869	AssertReturn( cbCallInfo >= sizeof(VBoxGuestHGCMCallInfo)
870	\|\| cbCallInfo >= pCallInfo->cParms * sizeof(HGCMFunctionParameter),
871	VERR_INVALID_PARAMETER);
872
873	Log(("GstHGCMCall: u32ClientID=%#x u32Function=%u cParms=%u cbCallInfo=%#x fFlags=%#x\n",
874	pCallInfo->u32ClientID, pCallInfo->u32ClientID, pCallInfo->u32Function, pCallInfo->cParms, cbCallInfo, fFlags));
875
876	/*
877	* Validate, lock and buffer the parameters for the call.
878	* This will calculate the amount of extra space for physical page list.
879	*/
880	rc = vbglR0HGCMInternalPreprocessCall(pCallInfo, cbCallInfo, fIsUser, &ParmInfo, &cbExtra);
881	if (RT_SUCCESS(rc))
882	{
883	/*
884	* Allocate the request buffer and recreate the call request.
885	*/
886	VMMDevHGCMCall *pHGCMCall;
887	rc = VbglGRAlloc((VMMDevRequestHeader **)&pHGCMCall,
888	sizeof(VMMDevHGCMCall) + pCallInfo->cParms * sizeof(HGCMFunctionParameter) + cbExtra,
889	VMMDevReq_HGCMCall);
890	if (RT_SUCCESS(rc))
891	{
892	bool fLeakIt;
893	vbglR0HGCMInternalInitCall(pHGCMCall, pCallInfo, cbCallInfo, fIsUser, &ParmInfo);
894
895	/*
896	* Perform the call.
897	*/
898	rc = vbglR0HGCMInternalDoCall(pHGCMCall, pfnAsyncCallback, pvAsyncData, u32AsyncData, &fLeakIt);
899	if (RT_SUCCESS(rc))
900	{
901	/*
902	* Copy back the result (parameters and buffers that changed).
903	*/
904	rc = vbglR0HGCMInternalCopyBackResult(pCallInfo, pHGCMCall, &ParmInfo, fIsUser, rc);
905	}
906	else
907	{
908	if ( rc != VERR_INTERRUPTED
909	&& rc != VERR_TIMEOUT)
910	{
911	static unsigned s_cErrors = 0;
912	if (s_cErrors++ < 32)
913	LogRel(("VbglR0HGCMInternalCall: vbglR0HGCMInternalDoCall failed. rc=%Rrc\n", rc));
914	}
915	}
916
917	if (!fLeakIt)
918	VbglGRFree(&pHGCMCall->header.header);
919	}
920	}
921	else
922	LogRel(("VbglR0HGCMInternalCall: vbglR0HGCMInternalPreprocessCall failed. rc=%Rrc\n", rc));
923
924	/*
925	* Release locks and free bounce buffers.
926	*/
927	if (ParmInfo.cLockBufs)
928	while (ParmInfo.cLockBufs-- > 0)
929	{
930	RTR0MemObjFree(ParmInfo.aLockBufs[ParmInfo.cLockBufs].hObj, false /fFreeMappings/);
931	#ifdef USE_BOUNCE_BUFFERS
932	RTMemTmpFree(ParmInfo.aLockBufs[ParmInfo.cLockBufs].pvSmallBuf);
933	#endif
934	}
935
936	return rc;
937	}
938
939
940	#if ARCH_BITS == 64
941	DECLR0VBGL(int) VbglR0HGCMInternalCall32(VBoxGuestHGCMCallInfo *pCallInfo, uint32_t cbCallInfo, uint32_t fFlags,
942	PFNVBGLHGCMCALLBACK pfnAsyncCallback, void *pvAsyncData, uint32_t u32AsyncData)
943	{
944	VBoxGuestHGCMCallInfo *pCallInfo64 = NULL;
945	HGCMFunctionParameter *pParm64 = NULL;
946	HGCMFunctionParameter32 *pParm32 = NULL;
947	uint32_t cParms = 0;
948	uint32_t iParm = 0;
949	int rc = VINF_SUCCESS;
950
951	/*
952	* Input validation.
953	*/
954	AssertMsgReturn( !pCallInfo
955	\|\| !pfnAsyncCallback
956	\|\| pCallInfo->cParms > VBOX_HGCM_MAX_PARMS
957	\|\| !(fFlags & ~VBGLR0_HGCMCALL_F_MODE_MASK),
958	("pCallInfo=%p pfnAsyncCallback=%p fFlags=%#x\n", pCallInfo, pfnAsyncCallback, fFlags),
959	VERR_INVALID_PARAMETER);
960	AssertReturn( cbCallInfo >= sizeof(VBoxGuestHGCMCallInfo)
961	\|\| cbCallInfo >= pCallInfo->cParms * sizeof(HGCMFunctionParameter32),
962	VERR_INVALID_PARAMETER);
963
964	/* This Assert does not work on Solaris/Windows 64/32 mixed mode, not sure why, skipping for now */
965	#if !defined(RT_OS_SOLARIS) && !defined(RT_OS_WINDOWS)
966	AssertReturn((fFlags & VBGLR0_HGCMCALL_F_MODE_MASK) == VBGLR0_HGCMCALL_F_KERNEL, VERR_WRONG_ORDER);
967	#endif
968
969	cParms = pCallInfo->cParms;
970	Log(("VbglR0HGCMInternalCall32: cParms=%d, u32Function=%d, fFlags=%#x\n", cParms, pCallInfo->u32Function, fFlags));
971
972	/*
973	* The simple approach, allocate a temporary request and convert the parameters.
974	*/
975	pCallInfo64 = (VBoxGuestHGCMCallInfo )RTMemTmpAllocZ(sizeof(pCallInfo64) + cParms * sizeof(HGCMFunctionParameter));
976	if (!pCallInfo64)
977	return VERR_NO_TMP_MEMORY;
978
979	pCallInfo64 = pCallInfo;
980	pParm32 = VBOXGUEST_HGCM_CALL_PARMS32(pCallInfo);
981	pParm64 = VBOXGUEST_HGCM_CALL_PARMS(pCallInfo64);
982	for (iParm = 0; iParm < cParms; iParm++, pParm32++, pParm64++)
983	{
984	switch (pParm32->type)
985	{
986	case VMMDevHGCMParmType_32bit:
987	pParm64->type = VMMDevHGCMParmType_32bit;
988	pParm64->u.value32 = pParm32->u.value32;
989	break;
990
991	case VMMDevHGCMParmType_64bit:
992	pParm64->type = VMMDevHGCMParmType_64bit;
993	pParm64->u.value64 = pParm32->u.value64;
994	break;
995
996	case VMMDevHGCMParmType_LinAddr_Out:
997	case VMMDevHGCMParmType_LinAddr:
998	case VMMDevHGCMParmType_LinAddr_In:
999	pParm64->type = pParm32->type;
1000	pParm64->u.Pointer.size = pParm32->u.Pointer.size;
1001	pParm64->u.Pointer.u.linearAddr = pParm32->u.Pointer.u.linearAddr;
1002	break;
1003
1004	default:
1005	rc = VERR_INVALID_PARAMETER;
1006	LogRel(("VbglR0HGCMInternalCall32: pParm32 type %#x invalid.\n", pParm32->type));
1007	break;
1008	}
1009	if (RT_FAILURE(rc))
1010	break;
1011	}
1012	if (RT_SUCCESS(rc))
1013	{
1014	rc = VbglR0HGCMInternalCall(pCallInfo64, sizeof(pCallInfo64) + cParms sizeof(HGCMFunctionParameter), fFlags,
1015	pfnAsyncCallback, pvAsyncData, u32AsyncData);
1016
1017	if (RT_SUCCESS(rc))
1018	{
1019	pCallInfo = pCallInfo64;
1020
1021	/*
1022	* Copy back.
1023	*/
1024	pParm32 = VBOXGUEST_HGCM_CALL_PARMS32(pCallInfo);
1025	pParm64 = VBOXGUEST_HGCM_CALL_PARMS(pCallInfo64);
1026	for (iParm = 0; iParm < cParms; iParm++, pParm32++, pParm64++)
1027	{
1028	switch (pParm64->type)
1029	{
1030	case VMMDevHGCMParmType_32bit:
1031	pParm32->u.value32 = pParm64->u.value32;
1032	break;
1033
1034	case VMMDevHGCMParmType_64bit:
1035	pParm32->u.value64 = pParm64->u.value64;
1036	break;
1037
1038	case VMMDevHGCMParmType_LinAddr_Out:
1039	case VMMDevHGCMParmType_LinAddr:
1040	case VMMDevHGCMParmType_LinAddr_In:
1041	pParm32->u.Pointer.size = pParm64->u.Pointer.size;
1042	break;
1043
1044	default:
1045	LogRel(("VbglR0HGCMInternalCall32: failed invalid pParm32 type %d\n", pParm32->type));
1046	rc = VERR_INTERNAL_ERROR_3;
1047	break;
1048	}
1049	}
1050	}
1051	else
1052	{
1053	static unsigned s_cErrors = 0;
1054	if (s_cErrors++ < 32)
1055	LogRel(("VbglR0HGCMInternalCall32: VbglR0HGCMInternalCall failed. rc=%Rrc\n", rc));
1056	}
1057	}
1058	else
1059	{
1060	static unsigned s_cErrors = 0;
1061	if (s_cErrors++ < 32)
1062	LogRel(("VbglR0HGCMInternalCall32: failed. rc=%Rrc\n", rc));
1063	}
1064
1065	RTMemTmpFree(pCallInfo64);
1066	return rc;
1067	}
1068	#endif /* ARCH_BITS == 64 */
1069
1070	#endif /* VBGL_VBOXGUEST */
1071

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source: vbox/trunk/src/VBox/Additions/common/VBoxGuestLib/HGCMInternal.cpp@ 35517

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