HGCMInternal.cpp@ 39693

Last change on this file since 39693 was 39693, checked in by vboxsync, 13 years ago
Additions/common/VBoxGuestLib: fixed LOG_GROUP define
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1	/* $Revision: 39693 $ */
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	#define LOG_GROUP LOG_GROUP_HGCM
34
35	#include "VBGLInternal.h"
36	#include <iprt/alloca.h>
37	#include <iprt/asm.h>
38	#include <iprt/assert.h>
39	#include <iprt/mem.h>
40	#include <iprt/memobj.h>
41	#include <iprt/string.h>
42	#include <iprt/thread.h>
43	#include <iprt/time.h>
44
45	/*******************************************************************************
46	* Defined Constants And Macros *
47	*******************************************************************************/
48	/** The max parameter buffer size for a user request. */
49	#define VBGLR0_MAX_HGCM_USER_PARM (24*_1M)
50	/** The max parameter buffer size for a kernel request. */
51	#define VBGLR0_MAX_HGCM_KERNEL_PARM (16*_1M)
52	#ifdef RT_OS_LINUX
53	/** Linux needs to use bounce buffers since RTR0MemObjLockUser has unwanted
54	* side effects. */
55	# define USE_BOUNCE_BUFFERS
56	#endif
57
58
59	/*******************************************************************************
60	* Structures and Typedefs *
61	*******************************************************************************/
62	/**
63	* Lock info structure used by VbglR0HGCMInternalCall and its helpers.
64	*/
65	struct VbglR0ParmInfo
66	{
67	uint32_t cLockBufs;
68	struct
69	{
70	uint32_t iParm;
71	RTR0MEMOBJ hObj;
72	#ifdef USE_BOUNCE_BUFFERS
73	void *pvSmallBuf;
74	#endif
75	} aLockBufs[10];
76	};
77
78
79
80	/* These functions can be only used by VBoxGuest. */
81
82	DECLVBGL(int) VbglR0HGCMInternalConnect (VBoxGuestHGCMConnectInfo *pConnectInfo,
83	PFNVBGLHGCMCALLBACK pfnAsyncCallback, void *pvAsyncData, uint32_t u32AsyncData)
84	{
85	VMMDevHGCMConnect *pHGCMConnect;
86	int rc;
87
88	if (!pConnectInfo \|\| !pfnAsyncCallback)
89	return VERR_INVALID_PARAMETER;
90
91	pHGCMConnect = NULL;
92
93	/* Allocate request */
94	rc = VbglGRAlloc ((VMMDevRequestHeader **)&pHGCMConnect, sizeof (VMMDevHGCMConnect), VMMDevReq_HGCMConnect);
95
96	if (RT_SUCCESS(rc))
97	{
98	/* Initialize request memory */
99	pHGCMConnect->header.fu32Flags = 0;
100
101	memcpy (&pHGCMConnect->loc, &pConnectInfo->Loc, sizeof (HGCMServiceLocation));
102	pHGCMConnect->u32ClientID = 0;
103
104	/* Issue request */
105	rc = VbglGRPerform (&pHGCMConnect->header.header);
106
107	if (RT_SUCCESS(rc))
108	{
109	/* Check if host decides to process the request asynchronously. */
110	if (rc == VINF_HGCM_ASYNC_EXECUTE)
111	{
112	/* Wait for request completion interrupt notification from host */
113	pfnAsyncCallback (&pHGCMConnect->header, pvAsyncData, u32AsyncData);
114	}
115
116	pConnectInfo->result = pHGCMConnect->header.result;
117
118	if (RT_SUCCESS (pConnectInfo->result))
119	pConnectInfo->u32ClientID = pHGCMConnect->u32ClientID;
120	}
121
122	VbglGRFree (&pHGCMConnect->header.header);
123	}
124
125	return rc;
126	}
127
128
129	DECLR0VBGL(int) VbglR0HGCMInternalDisconnect (VBoxGuestHGCMDisconnectInfo *pDisconnectInfo,
130	PFNVBGLHGCMCALLBACK pfnAsyncCallback, void *pvAsyncData, uint32_t u32AsyncData)
131	{
132	VMMDevHGCMDisconnect *pHGCMDisconnect;
133	int rc;
134
135	if (!pDisconnectInfo \|\| !pfnAsyncCallback)
136	return VERR_INVALID_PARAMETER;
137
138	pHGCMDisconnect = NULL;
139
140	/* Allocate request */
141	rc = VbglGRAlloc ((VMMDevRequestHeader **)&pHGCMDisconnect, sizeof (VMMDevHGCMDisconnect), VMMDevReq_HGCMDisconnect);
142
143	if (RT_SUCCESS(rc))
144	{
145	/* Initialize request memory */
146	pHGCMDisconnect->header.fu32Flags = 0;
147
148	pHGCMDisconnect->u32ClientID = pDisconnectInfo->u32ClientID;
149
150	/* Issue request */
151	rc = VbglGRPerform (&pHGCMDisconnect->header.header);
152
153	if (RT_SUCCESS(rc))
154	{
155	/* Check if host decides to process the request asynchronously. */
156	if (rc == VINF_HGCM_ASYNC_EXECUTE)
157	{
158	/* Wait for request completion interrupt notification from host */
159	pfnAsyncCallback (&pHGCMDisconnect->header, pvAsyncData, u32AsyncData);
160	}
161
162	pDisconnectInfo->result = pHGCMDisconnect->header.result;
163	}
164
165	VbglGRFree (&pHGCMDisconnect->header.header);
166	}
167
168	return rc;
169	}
170
171
172	/**
173	* Preprocesses the HGCM call, validating and locking/buffering parameters.
174	*
175	* @returns VBox status code.
176	*
177	* @param pCallInfo The call info.
178	* @param cbCallInfo The size of the call info structure.
179	* @param fIsUser Is it a user request or kernel request.
180	* @param pcbExtra Where to return the extra request space needed for
181	* physical page lists.
182	*/
183	static int vbglR0HGCMInternalPreprocessCall(VBoxGuestHGCMCallInfo const *pCallInfo, uint32_t cbCallInfo,
184	bool fIsUser, struct VbglR0ParmInfo pParmInfo, size_t pcbExtra)
185	{
186	HGCMFunctionParameter const *pSrcParm = VBOXGUEST_HGCM_CALL_PARMS(pCallInfo);
187	uint32_t cParms = pCallInfo->cParms;
188	uint32_t iParm;
189	uint32_t cb;
190
191	/*
192	* Lock down the any linear buffers so we can get their addresses
193	* and figure out how much extra storage we need for page lists.
194	*
195	* Note! With kernel mode users we can be assertive. For user mode users
196	* we should just (debug) log it and fail without any fanfare.
197	*/
198	*pcbExtra = 0;
199	pParmInfo->cLockBufs = 0;
200	for (iParm = 0; iParm < cParms; iParm++, pSrcParm++)
201	{
202	switch (pSrcParm->type)
203	{
204	case VMMDevHGCMParmType_32bit:
205	Log4(("GstHGCMCall: parm=%u type=32bit: %#010x\n", iParm, pSrcParm->u.value32));
206	break;
207
208	case VMMDevHGCMParmType_64bit:
209	Log4(("GstHGCMCall: parm=%u type=64bit: %#018x\n", iParm, pSrcParm->u.value64));
210	break;
211
212	case VMMDevHGCMParmType_PageList:
213	if (fIsUser)
214	return VERR_INVALID_PARAMETER;
215	cb = pSrcParm->u.PageList.size;
216	if (cb)
217	{
218	uint32_t off = pSrcParm->u.PageList.offset;
219	HGCMPageListInfo *pPgLst;
220	uint32_t cPages;
221	uint32_t u32;
222
223	AssertMsgReturn(cb <= VBGLR0_MAX_HGCM_KERNEL_PARM, ("%#x > %#x\n", cb, VBGLR0_MAX_HGCM_KERNEL_PARM),
224	VERR_OUT_OF_RANGE);
225	AssertMsgReturn( off >= pCallInfo->cParms * sizeof(HGCMFunctionParameter)
226	&& off <= cbCallInfo - sizeof(HGCMPageListInfo),
227	("offset=%#x cParms=%#x cbCallInfo=%#x\n", off, pCallInfo->cParms, cbCallInfo),
228	VERR_INVALID_PARAMETER);
229
230	pPgLst = (HGCMPageListInfo )((uint8_t )pCallInfo + off);
231	cPages = pPgLst->cPages;
232	u32 = RT_OFFSETOF(HGCMPageListInfo, aPages[cPages]) + off;
233	AssertMsgReturn(u32 <= cbCallInfo,
234	("u32=%#x (cPages=%#x offset=%#x) cbCallInfo=%#x\n", u32, cPages, off, cbCallInfo),
235	VERR_INVALID_PARAMETER);
236	AssertMsgReturn(pPgLst->offFirstPage < PAGE_SIZE, ("#x\n", pPgLst->offFirstPage), VERR_INVALID_PARAMETER);
237	u32 = RT_ALIGN_32(pPgLst->offFirstPage + cb, PAGE_SIZE) >> PAGE_SHIFT;
238	AssertMsgReturn(cPages == u32, ("cPages=%#x u32=%#x\n", cPages, u32), VERR_INVALID_PARAMETER);
239	AssertMsgReturn(VBOX_HGCM_F_PARM_ARE_VALID(pPgLst->flags), ("%#x\n", pPgLst->flags), VERR_INVALID_PARAMETER);
240	Log4(("GstHGCMCall: parm=%u type=pglst: cb=%#010x cPgs=%u offPg0=%#x flags=%#x\n",
241	iParm, cb, cPages, pPgLst->offFirstPage, pPgLst->flags));
242	u32 = cPages;
243	while (u32-- > 0)
244	{
245	Log4(("GstHGCMCall: pg#%u=%RHp\n", u32, pPgLst->aPages[u32]));
246	AssertMsgReturn(!(pPgLst->aPages[u32] & (PAGE_OFFSET_MASK \| UINT64_C(0xfff0000000000000))),
247	("pg#%u=%RHp\n", u32, pPgLst->aPages[u32]),
248	VERR_INVALID_PARAMETER);
249	}
250
251	*pcbExtra += RT_OFFSETOF(HGCMPageListInfo, aPages[pPgLst->cPages]);
252	}
253	else
254	Log4(("GstHGCMCall: parm=%u type=pglst: cb=0\n", iParm));
255	break;
256
257	case VMMDevHGCMParmType_LinAddr_Locked_In:
258	case VMMDevHGCMParmType_LinAddr_Locked_Out:
259	case VMMDevHGCMParmType_LinAddr_Locked:
260	if (fIsUser)
261	return VERR_INVALID_PARAMETER;
262	if (!VBGLR0_CAN_USE_PHYS_PAGE_LIST())
263	{
264	cb = pSrcParm->u.Pointer.size;
265	AssertMsgReturn(cb <= VBGLR0_MAX_HGCM_KERNEL_PARM, ("%#x > %#x\n", cb, VBGLR0_MAX_HGCM_KERNEL_PARM),
266	VERR_OUT_OF_RANGE);
267	if (cb != 0)
268	Log4(("GstHGCMCall: parm=%u type=%#x: cb=%#010x pv=%p\n",
269	iParm, pSrcParm->type, cb, pSrcParm->u.Pointer.u.linearAddr));
270	else
271	Log4(("GstHGCMCall: parm=%u type=%#x: cb=0\n", iParm, pSrcParm->type));
272	break;
273	}
274	/* fall thru */
275
276	case VMMDevHGCMParmType_LinAddr_In:
277	case VMMDevHGCMParmType_LinAddr_Out:
278	case VMMDevHGCMParmType_LinAddr:
279	cb = pSrcParm->u.Pointer.size;
280	if (cb != 0)
281	{
282	#ifdef USE_BOUNCE_BUFFERS
283	void *pvSmallBuf = NULL;
284	#endif
285	uint32_t iLockBuf = pParmInfo->cLockBufs;
286	RTR0MEMOBJ hObj;
287	int rc;
288	uint32_t fAccess = pSrcParm->type == VMMDevHGCMParmType_LinAddr_In
289	\|\| pSrcParm->type == VMMDevHGCMParmType_LinAddr_Locked_In
290	? RTMEM_PROT_READ
291	: RTMEM_PROT_READ \| RTMEM_PROT_WRITE;
292
293	AssertReturn(iLockBuf < RT_ELEMENTS(pParmInfo->aLockBufs), VERR_INVALID_PARAMETER);
294	if (!fIsUser)
295	{
296	AssertMsgReturn(cb <= VBGLR0_MAX_HGCM_KERNEL_PARM, ("%#x > %#x\n", cb, VBGLR0_MAX_HGCM_KERNEL_PARM),
297	VERR_OUT_OF_RANGE);
298	rc = RTR0MemObjLockKernel(&hObj, (void *)pSrcParm->u.Pointer.u.linearAddr, cb, fAccess);
299	if (RT_FAILURE(rc))
300	{
301	Log(("GstHGCMCall: id=%#x fn=%u parm=%u RTR0MemObjLockKernel(,%p,%#x) -> %Rrc\n",
302	pCallInfo->u32ClientID, pCallInfo->u32Function, iParm, pSrcParm->u.Pointer.u.linearAddr, cb, rc));
303	return rc;
304	}
305	Log3(("GstHGCMCall: parm=%u type=%#x: cb=%#010x pv=%p locked kernel -> %p\n",
306	iParm, pSrcParm->type, cb, pSrcParm->u.Pointer.u.linearAddr, hObj));
307	}
308	else if (cb > VBGLR0_MAX_HGCM_USER_PARM)
309	{
310	Log(("GstHGCMCall: id=%#x fn=%u parm=%u pv=%p cb=%#x > %#x -> out of range\n",
311	pCallInfo->u32ClientID, pCallInfo->u32Function, iParm, pSrcParm->u.Pointer.u.linearAddr,
312	cb, VBGLR0_MAX_HGCM_USER_PARM));
313	return VERR_OUT_OF_RANGE;
314	}
315	else
316	{
317	#ifndef USE_BOUNCE_BUFFERS
318	rc = RTR0MemObjLockUser(&hObj, (RTR3PTR)pSrcParm->u.Pointer.u.linearAddr, cb, fAccess, NIL_RTR0PROCESS);
319	if (RT_FAILURE(rc))
320	{
321	Log(("GstHGCMCall: id=%#x fn=%u parm=%u RTR0MemObjLockUser(,%p,%#x,nil) -> %Rrc\n",
322	pCallInfo->u32ClientID, pCallInfo->u32Function, iParm, pSrcParm->u.Pointer.u.linearAddr, cb, rc));
323	return rc;
324	}
325	Log3(("GstHGCMCall: parm=%u type=%#x: cb=%#010x pv=%p locked user -> %p\n",
326	iParm, pSrcParm->type, cb, pSrcParm->u.Pointer.u.linearAddr, hObj));
327
328	#else /* USE_BOUNCE_BUFFERS */
329	/*
330	* This is a bit massive, but we don't want to waste a
331	* whole page for a 3 byte string buffer (guest props).
332	*
333	* The threshold is ASSUMING sizeof(RTMEMHDR) == 16 and
334	* the system is using some power of two allocator.
335	*/
336	/** @todo A more efficient strategy would be to combine buffers. However it
337	* is probably going to be more massive than the current code, so
338	* it can wait till later. */
339	bool fCopyIn = pSrcParm->type != VMMDevHGCMParmType_LinAddr_Out
340	&& pSrcParm->type != VMMDevHGCMParmType_LinAddr_Locked_Out;
341	if (cb <= PAGE_SIZE / 2 - 16)
342	{
343	pvSmallBuf = fCopyIn ? RTMemTmpAlloc(cb) : RTMemTmpAllocZ(cb);
344	if (RT_UNLIKELY(!pvSmallBuf))
345	return VERR_NO_MEMORY;
346	if (fCopyIn)
347	{
348	rc = RTR0MemUserCopyFrom(pvSmallBuf, pSrcParm->u.Pointer.u.linearAddr, cb);
349	if (RT_FAILURE(rc))
350	{
351	RTMemTmpFree(pvSmallBuf);
352	Log(("GstHGCMCall: id=%#x fn=%u parm=%u RTR0MemUserCopyFrom(,%p,%#x) -> %Rrc\n",
353	pCallInfo->u32ClientID, pCallInfo->u32Function, iParm,
354	pSrcParm->u.Pointer.u.linearAddr, cb, rc));
355	return rc;
356	}
357	}
358	rc = RTR0MemObjLockKernel(&hObj, pvSmallBuf, cb, fAccess);
359	if (RT_FAILURE(rc))
360	{
361	RTMemTmpFree(pvSmallBuf);
362	Log(("GstHGCMCall: RTR0MemObjLockKernel failed for small buffer: rc=%Rrc pvSmallBuf=%p cb=%#x\n",
363	rc, pvSmallBuf, cb));
364	return rc;
365	}
366	Log3(("GstHGCMCall: parm=%u type=%#x: cb=%#010x pv=%p small buffer %p -> %p\n",
367	iParm, pSrcParm->type, cb, pSrcParm->u.Pointer.u.linearAddr, pvSmallBuf, hObj));
368	}
369	else
370	{
371	rc = RTR0MemObjAllocPage(&hObj, cb, false /fExecutable/);
372	if (RT_FAILURE(rc))
373	return rc;
374	if (!fCopyIn)
375	memset(RTR0MemObjAddress(hObj), '\0', cb);
376	else
377	{
378	rc = RTR0MemUserCopyFrom(RTR0MemObjAddress(hObj), pSrcParm->u.Pointer.u.linearAddr, cb);
379	if (RT_FAILURE(rc))
380	{
381	RTR0MemObjFree(hObj, false /fFreeMappings/);
382	Log(("GstHGCMCall: id=%#x fn=%u parm=%u RTR0MemUserCopyFrom(,%p,%#x) -> %Rrc\n",
383	pCallInfo->u32ClientID, pCallInfo->u32Function, iParm,
384	pSrcParm->u.Pointer.u.linearAddr, cb, rc));
385	return rc;
386	}
387	}
388	Log3(("GstHGCMCall: parm=%u type=%#x: cb=%#010x pv=%p big buffer -> %p\n",
389	iParm, pSrcParm->type, cb, pSrcParm->u.Pointer.u.linearAddr, hObj));
390	}
391	#endif /* USE_BOUNCE_BUFFERS */
392	}
393
394	pParmInfo->aLockBufs[iLockBuf].iParm = iParm;
395	pParmInfo->aLockBufs[iLockBuf].hObj = hObj;
396	#ifdef USE_BOUNCE_BUFFERS
397	pParmInfo->aLockBufs[iLockBuf].pvSmallBuf = pvSmallBuf;
398	#endif
399	pParmInfo->cLockBufs = iLockBuf + 1;
400
401	if (VBGLR0_CAN_USE_PHYS_PAGE_LIST())
402	{
403	size_t const cPages = RTR0MemObjSize(hObj) >> PAGE_SHIFT;
404	*pcbExtra += RT_OFFSETOF(HGCMPageListInfo, aPages[cPages]);
405	}
406	}
407	else
408	Log4(("GstHGCMCall: parm=%u type=%#x: cb=0\n", iParm, pSrcParm->type));
409	break;
410
411	default:
412	return VERR_INVALID_PARAMETER;
413	}
414	}
415
416	return VINF_SUCCESS;
417	}
418
419
420	/**
421	* Translates locked linear address to the normal type.
422	* The locked types are only for the guest side and not handled by the host.
423	*
424	* @returns normal linear address type.
425	* @param enmType The type.
426	*/
427	static HGCMFunctionParameterType vbglR0HGCMInternalConvertLinAddrType(HGCMFunctionParameterType enmType)
428	{
429	switch (enmType)
430	{
431	case VMMDevHGCMParmType_LinAddr_Locked_In:
432	return VMMDevHGCMParmType_LinAddr_In;
433	case VMMDevHGCMParmType_LinAddr_Locked_Out:
434	return VMMDevHGCMParmType_LinAddr_Out;
435	case VMMDevHGCMParmType_LinAddr_Locked:
436	return VMMDevHGCMParmType_LinAddr;
437	default:
438	return enmType;
439	}
440	}
441
442
443	/**
444	* Translates linear address types to page list direction flags.
445	*
446	* @returns page list flags.
447	* @param enmType The type.
448	*/
449	static uint32_t vbglR0HGCMInternalLinAddrTypeToPageListFlags(HGCMFunctionParameterType enmType)
450	{
451	switch (enmType)
452	{
453	case VMMDevHGCMParmType_LinAddr_In:
454	case VMMDevHGCMParmType_LinAddr_Locked_In:
455	return VBOX_HGCM_F_PARM_DIRECTION_TO_HOST;
456
457	case VMMDevHGCMParmType_LinAddr_Out:
458	case VMMDevHGCMParmType_LinAddr_Locked_Out:
459	return VBOX_HGCM_F_PARM_DIRECTION_FROM_HOST;
460
461	default: AssertFailed();
462	case VMMDevHGCMParmType_LinAddr:
463	case VMMDevHGCMParmType_LinAddr_Locked:
464	return VBOX_HGCM_F_PARM_DIRECTION_BOTH;
465	}
466	}
467
468
469	/**
470	* Initializes the call request that we're sending to the host.
471	*
472	* @returns VBox status code.
473	*
474	* @param pCallInfo The call info.
475	* @param cbCallInfo The size of the call info structure.
476	* @param fIsUser Is it a user request or kernel request.
477	* @param pcbExtra Where to return the extra request space needed for
478	* physical page lists.
479	*/
480	static void vbglR0HGCMInternalInitCall(VMMDevHGCMCall pHGCMCall, VBoxGuestHGCMCallInfo const pCallInfo,
481	uint32_t cbCallInfo, bool fIsUser, struct VbglR0ParmInfo *pParmInfo)
482	{
483	HGCMFunctionParameter const *pSrcParm = VBOXGUEST_HGCM_CALL_PARMS(pCallInfo);
484	HGCMFunctionParameter *pDstParm = VMMDEV_HGCM_CALL_PARMS(pHGCMCall);
485	uint32_t cParms = pCallInfo->cParms;
486	uint32_t offExtra = (uintptr_t)(pDstParm + cParms) - (uintptr_t)pHGCMCall;
487	uint32_t iLockBuf = 0;
488	uint32_t iParm;
489
490
491	/*
492	* The call request headers.
493	*/
494	pHGCMCall->header.fu32Flags = 0;
495	pHGCMCall->header.result = VINF_SUCCESS;
496
497	pHGCMCall->u32ClientID = pCallInfo->u32ClientID;
498	pHGCMCall->u32Function = pCallInfo->u32Function;
499	pHGCMCall->cParms = cParms;
500
501	/*
502	* The parameters.
503	*/
504	for (iParm = 0; iParm < pCallInfo->cParms; iParm++, pSrcParm++, pDstParm++)
505	{
506	switch (pSrcParm->type)
507	{
508	case VMMDevHGCMParmType_32bit:
509	case VMMDevHGCMParmType_64bit:
510	pDstParm = pSrcParm;
511	break;
512
513	case VMMDevHGCMParmType_PageList:
514	pDstParm->type = VMMDevHGCMParmType_PageList;
515	pDstParm->u.PageList.size = pSrcParm->u.PageList.size;
516	if (pSrcParm->u.PageList.size)
517	{
518	HGCMPageListInfo const pSrcPgLst = (HGCMPageListInfo )((uint8_t *)pCallInfo + pSrcParm->u.PageList.offset);
519	HGCMPageListInfo pDstPgLst = (HGCMPageListInfo )((uint8_t *)pHGCMCall + offExtra);
520	uint32_t const cPages = pSrcPgLst->cPages;
521	uint32_t iPage;
522
523	pDstParm->u.PageList.offset = offExtra;
524	pDstPgLst->flags = pSrcPgLst->flags;
525	pDstPgLst->offFirstPage = pSrcPgLst->offFirstPage;
526	pDstPgLst->cPages = cPages;
527	for (iPage = 0; iPage < cPages; iPage++)
528	pDstPgLst->aPages[iPage] = pSrcPgLst->aPages[iPage];
529
530	offExtra += RT_OFFSETOF(HGCMPageListInfo, aPages[cPages]);
531	}
532	else
533	pDstParm->u.PageList.offset = 0;
534	break;
535
536	case VMMDevHGCMParmType_LinAddr_Locked_In:
537	case VMMDevHGCMParmType_LinAddr_Locked_Out:
538	case VMMDevHGCMParmType_LinAddr_Locked:
539	if (!VBGLR0_CAN_USE_PHYS_PAGE_LIST())
540	{
541	pDstParm = pSrcParm;
542	pDstParm->type = vbglR0HGCMInternalConvertLinAddrType(pSrcParm->type);
543	break;
544	}
545	/* fall thru */
546
547	case VMMDevHGCMParmType_LinAddr_In:
548	case VMMDevHGCMParmType_LinAddr_Out:
549	case VMMDevHGCMParmType_LinAddr:
550	if (pSrcParm->u.Pointer.size != 0)
551	{
552	#ifdef USE_BOUNCE_BUFFERS
553	void *pvSmallBuf = pParmInfo->aLockBufs[iLockBuf].pvSmallBuf;
554	#endif
555	RTR0MEMOBJ hObj = pParmInfo->aLockBufs[iLockBuf].hObj;
556	Assert(iParm == pParmInfo->aLockBufs[iLockBuf].iParm);
557
558	if (VBGLR0_CAN_USE_PHYS_PAGE_LIST())
559	{
560	HGCMPageListInfo pDstPgLst = (HGCMPageListInfo )((uint8_t *)pHGCMCall + offExtra);
561	size_t const cPages = RTR0MemObjSize(hObj) >> PAGE_SHIFT;
562	size_t iPage;
563
564	pDstParm->type = VMMDevHGCMParmType_PageList;
565	pDstParm->u.PageList.size = pSrcParm->u.Pointer.size;
566	pDstParm->u.PageList.offset = offExtra;
567	pDstPgLst->flags = vbglR0HGCMInternalLinAddrTypeToPageListFlags(pSrcParm->type);
568	#ifdef USE_BOUNCE_BUFFERS
569	if (fIsUser)
570	pDstPgLst->offFirstPage = (uintptr_t)pvSmallBuf & PAGE_OFFSET_MASK;
571	else
572	#endif
573	pDstPgLst->offFirstPage = pSrcParm->u.Pointer.u.linearAddr & PAGE_OFFSET_MASK;
574	pDstPgLst->cPages = cPages; Assert(pDstPgLst->cPages == cPages);
575	for (iPage = 0; iPage < cPages; iPage++)
576	{
577	pDstPgLst->aPages[iPage] = RTR0MemObjGetPagePhysAddr(hObj, iPage);
578	Assert(pDstPgLst->aPages[iPage] != NIL_RTHCPHYS);
579	}
580
581	offExtra += RT_OFFSETOF(HGCMPageListInfo, aPages[cPages]);
582	}
583	else
584	{
585	pDstParm->type = vbglR0HGCMInternalConvertLinAddrType(pSrcParm->type);
586	pDstParm->u.Pointer.size = pSrcParm->u.Pointer.size;
587	#ifdef USE_BOUNCE_BUFFERS
588	if (fIsUser)
589	pDstParm->u.Pointer.u.linearAddr = pvSmallBuf
590	? (uintptr_t)pvSmallBuf
591	: (uintptr_t)RTR0MemObjAddress(hObj);
592	else
593	#endif
594	pDstParm->u.Pointer.u.linearAddr = pSrcParm->u.Pointer.u.linearAddr;
595	}
596	iLockBuf++;
597	}
598	else
599	{
600	pDstParm->type = vbglR0HGCMInternalConvertLinAddrType(pSrcParm->type);
601	pDstParm->u.Pointer.size = 0;
602	pDstParm->u.Pointer.u.linearAddr = 0;
603	}
604	break;
605
606	default:
607	AssertFailed();
608	pDstParm->type = VMMDevHGCMParmType_Invalid;
609	break;
610	}
611	}
612	}
613
614
615	/**
616	* Performs the call and completion wait.
617	*
618	* @returns VBox status code of this operation, not necessarily the call.
619	*
620	* @param pHGCMCall The HGCM call info.
621	* @param pfnAsyncCallback The async callback that will wait for the call
622	* to complete.
623	* @param pvAsyncData Argument for the callback.
624	* @param u32AsyncData Argument for the callback.
625	* @param pfLeakIt Where to return the leak it / free it,
626	* indicator. Cancellation fun.
627	*/
628	static int vbglR0HGCMInternalDoCall(VMMDevHGCMCall *pHGCMCall, PFNVBGLHGCMCALLBACK pfnAsyncCallback,
629	void pvAsyncData, uint32_t u32AsyncData, bool pfLeakIt)
630	{
631	int rc;
632
633	Log(("calling VbglGRPerform\n"));
634	rc = VbglGRPerform(&pHGCMCall->header.header);
635	Log(("VbglGRPerform rc = %Rrc (header rc=%d)\n", rc, pHGCMCall->header.result));
636
637	/*
638	* If the call failed, but as a result of the request itself, then pretend
639	* success. Upper layers will interpret the result code in the packet.
640	*/
641	if ( RT_FAILURE(rc)
642	&& rc == pHGCMCall->header.result)
643	{
644	Assert(pHGCMCall->header.fu32Flags & VBOX_HGCM_REQ_DONE);
645	rc = VINF_SUCCESS;
646	}
647
648	/*
649	* Check if host decides to process the request asynchronously,
650	* if so, we wait for it to complete using the caller supplied callback.
651	*/
652	*pfLeakIt = false;
653	if (rc == VINF_HGCM_ASYNC_EXECUTE)
654	{
655	Log(("Processing HGCM call asynchronously\n"));
656	rc = pfnAsyncCallback(&pHGCMCall->header, pvAsyncData, u32AsyncData);
657	if (pHGCMCall->header.fu32Flags & VBOX_HGCM_REQ_DONE)
658	{
659	Assert(!(pHGCMCall->header.fu32Flags & VBOX_HGCM_REQ_CANCELLED));
660	rc = VINF_SUCCESS;
661	}
662	else
663	{
664	/*
665	* The request didn't complete in time or the call was interrupted,
666	* the RC from the callback indicates which. Try cancel the request.
667	*
668	* This is a bit messy because we're racing request completion. Sorry.
669	*/
670	/** @todo It would be nice if we could use the waiter callback to do further
671	* waiting in case of a completion race. If it wasn't for WINNT having its own
672	* version of all that stuff, I would've done it already. */
673	VMMDevHGCMCancel2 *pCancelReq;
674	int rc2 = VbglGRAlloc((VMMDevRequestHeader *)&pCancelReq, sizeof(pCancelReq), VMMDevReq_HGCMCancel2);
675	if (RT_SUCCESS(rc2))
676	{
677	pCancelReq->physReqToCancel = VbglPhysHeapGetPhysAddr(pHGCMCall);
678	rc2 = VbglGRPerform(&pCancelReq->header);
679	VbglGRFree(&pCancelReq->header);
680	}
681	#if 1 /** @todo ADDVER: Remove this on next minor version change. */
682	if (rc2 == VERR_NOT_IMPLEMENTED)
683	{
684	/* host is too old, or we're out of heap. */
685	pHGCMCall->header.fu32Flags \|= VBOX_HGCM_REQ_CANCELLED;
686	pHGCMCall->header.header.requestType = VMMDevReq_HGCMCancel;
687	rc2 = VbglGRPerform(&pHGCMCall->header.header);
688	if (rc2 == VERR_INVALID_PARAMETER)
689	rc2 = VERR_NOT_FOUND;
690	else if (RT_SUCCESS(rc))
691	RTThreadSleep(1);
692	}
693	#endif
694	if (RT_SUCCESS(rc)) rc = VERR_INTERRUPTED; /** @todo weed this out from the WINNT VBoxGuest code. */
695	if (RT_SUCCESS(rc2))
696	{
697	Log(("vbglR0HGCMInternalDoCall: successfully cancelled\n"));
698	pHGCMCall->header.fu32Flags \|= VBOX_HGCM_REQ_CANCELLED;
699	}
700	else
701	{
702	/*
703	* Wait for a bit while the host (hopefully) completes it.
704	*/
705	uint64_t u64Start = RTTimeSystemMilliTS();
706	uint32_t cMilliesToWait = rc2 == VERR_NOT_FOUND \|\| rc2 == VERR_SEM_DESTROYED ? 500 : 2000;
707	uint64_t cElapsed = 0;
708	if (rc2 != VERR_NOT_FOUND)
709	{
710	static unsigned s_cErrors = 0;
711	if (s_cErrors++ < 32)
712	LogRel(("vbglR0HGCMInternalDoCall: Failed to cancel the HGCM call on %Rrc: rc2=%Rrc\n", rc, rc2));
713	}
714	else
715	Log(("vbglR0HGCMInternalDoCall: Cancel race rc=%Rrc rc2=%Rrc\n", rc, rc2));
716
717	do
718	{
719	ASMCompilerBarrier(); /* paranoia */
720	if (pHGCMCall->header.fu32Flags & VBOX_HGCM_REQ_DONE)
721	break;
722	RTThreadSleep(1);
723	cElapsed = RTTimeSystemMilliTS() - u64Start;
724	} while (cElapsed < cMilliesToWait);
725
726	ASMCompilerBarrier(); /* paranoia^2 */
727	if (pHGCMCall->header.fu32Flags & VBOX_HGCM_REQ_DONE)
728	rc = VINF_SUCCESS;
729	else
730	{
731	LogRel(("vbglR0HGCMInternalDoCall: Leaking %u bytes. Pending call to %u with %u parms. (rc2=%Rrc)\n",
732	pHGCMCall->header.header.size, pHGCMCall->u32Function, pHGCMCall->cParms, rc2));
733	*pfLeakIt = true;
734	}
735	Log(("vbglR0HGCMInternalDoCall: Cancel race ended with rc=%Rrc (rc2=%Rrc) after %llu ms\n", rc, rc2, cElapsed));
736	}
737	}
738	}
739
740	Log(("GstHGCMCall: rc=%Rrc result=%Rrc fu32Flags=%#x fLeakIt=%d\n",
741	rc, pHGCMCall->header.result, pHGCMCall->header.fu32Flags, *pfLeakIt));
742	return rc;
743	}
744
745
746	/**
747	* Copies the result of the call back to the caller info structure and user
748	* buffers (if using bounce buffers).
749	*
750	* @returns rc, unless RTR0MemUserCopyTo fails.
751	* @param pCallInfo Call info structure to update.
752	* @param pHGCMCall HGCM call request.
753	* @param pParmInfo Parameter locking/buffering info.
754	* @param fIsUser Is it a user (true) or kernel request.
755	* @param rc The current result code. Passed along to
756	* preserve informational status codes.
757	*/
758	static int vbglR0HGCMInternalCopyBackResult(VBoxGuestHGCMCallInfo pCallInfo, VMMDevHGCMCall const pHGCMCall,
759	struct VbglR0ParmInfo *pParmInfo, bool fIsUser, int rc)
760	{
761	HGCMFunctionParameter const *pSrcParm = VMMDEV_HGCM_CALL_PARMS(pHGCMCall);
762	HGCMFunctionParameter *pDstParm = VBOXGUEST_HGCM_CALL_PARMS(pCallInfo);
763	uint32_t cParms = pCallInfo->cParms;
764	#ifdef USE_BOUNCE_BUFFERS
765	uint32_t iLockBuf = 0;
766	#endif
767	uint32_t iParm;
768
769	/*
770	* The call result.
771	*/
772	pCallInfo->result = pHGCMCall->header.result;
773
774	/*
775	* Copy back parameters.
776	*/
777	for (iParm = 0; iParm < cParms; iParm++, pSrcParm++, pDstParm++)
778	{
779	switch (pDstParm->type)
780	{
781	case VMMDevHGCMParmType_32bit:
782	case VMMDevHGCMParmType_64bit:
783	pDstParm = pSrcParm;
784	break;
785
786	case VMMDevHGCMParmType_PageList:
787	pDstParm->u.PageList.size = pSrcParm->u.PageList.size;
788	break;
789
790	case VMMDevHGCMParmType_LinAddr_Locked_In:
791	case VMMDevHGCMParmType_LinAddr_In:
792	#ifdef USE_BOUNCE_BUFFERS
793	if ( fIsUser
794	&& iLockBuf < pParmInfo->cLockBufs
795	&& iParm == pParmInfo->aLockBufs[iLockBuf].iParm)
796	iLockBuf++;
797	#endif
798	pDstParm->u.Pointer.size = pSrcParm->u.Pointer.size;
799	break;
800
801	case VMMDevHGCMParmType_LinAddr_Locked_Out:
802	case VMMDevHGCMParmType_LinAddr_Locked:
803	if (!VBGLR0_CAN_USE_PHYS_PAGE_LIST())
804	{
805	pDstParm->u.Pointer.size = pSrcParm->u.Pointer.size;
806	break;
807	}
808	/* fall thru */
809
810	case VMMDevHGCMParmType_LinAddr_Out:
811	case VMMDevHGCMParmType_LinAddr:
812	{
813	#ifdef USE_BOUNCE_BUFFERS
814	if (fIsUser)
815	{
816	size_t cbOut = RT_MIN(pSrcParm->u.Pointer.size, pDstParm->u.Pointer.size);
817	if (cbOut)
818	{
819	int rc2;
820	Assert(pParmInfo->aLockBufs[iLockBuf].iParm == iParm);
821	rc2 = RTR0MemUserCopyTo((RTR3PTR)pDstParm->u.Pointer.u.linearAddr,
822	pParmInfo->aLockBufs[iLockBuf].pvSmallBuf
823	? pParmInfo->aLockBufs[iLockBuf].pvSmallBuf
824	: RTR0MemObjAddress(pParmInfo->aLockBufs[iLockBuf].hObj),
825	cbOut);
826	if (RT_FAILURE(rc2))
827	return rc2;
828	iLockBuf++;
829	}
830	else if ( iLockBuf < pParmInfo->cLockBufs
831	&& iParm == pParmInfo->aLockBufs[iLockBuf].iParm)
832	iLockBuf++;
833	}
834	#endif
835	pDstParm->u.Pointer.size = pSrcParm->u.Pointer.size;
836	break;
837	}
838
839	default:
840	AssertFailed();
841	rc = VERR_INTERNAL_ERROR_4;
842	break;
843	}
844	}
845
846	#ifdef USE_BOUNCE_BUFFERS
847	Assert(!fIsUser \|\| pParmInfo->cLockBufs == iLockBuf);
848	#endif
849	return rc;
850	}
851
852
853	DECLR0VBGL(int) VbglR0HGCMInternalCall(VBoxGuestHGCMCallInfo *pCallInfo, uint32_t cbCallInfo, uint32_t fFlags,
854	PFNVBGLHGCMCALLBACK pfnAsyncCallback, void *pvAsyncData, uint32_t u32AsyncData)
855	{
856	bool fIsUser = (fFlags & VBGLR0_HGCMCALL_F_MODE_MASK) == VBGLR0_HGCMCALL_F_USER;
857	struct VbglR0ParmInfo ParmInfo;
858	size_t cbExtra;
859	int rc;
860
861	/*
862	* Basic validation.
863	*/
864	AssertMsgReturn( !pCallInfo
865	\|\| !pfnAsyncCallback
866	\|\| pCallInfo->cParms > VBOX_HGCM_MAX_PARMS
867	\|\| !(fFlags & ~VBGLR0_HGCMCALL_F_MODE_MASK),
868	("pCallInfo=%p pfnAsyncCallback=%p fFlags=%#x\n", pCallInfo, pfnAsyncCallback, fFlags),
869	VERR_INVALID_PARAMETER);
870	AssertReturn( cbCallInfo >= sizeof(VBoxGuestHGCMCallInfo)
871	\|\| cbCallInfo >= pCallInfo->cParms * sizeof(HGCMFunctionParameter),
872	VERR_INVALID_PARAMETER);
873
874	Log(("GstHGCMCall: u32ClientID=%#x u32Function=%u cParms=%u cbCallInfo=%#x fFlags=%#x\n",
875	pCallInfo->u32ClientID, pCallInfo->u32ClientID, pCallInfo->u32Function, pCallInfo->cParms, cbCallInfo, fFlags));
876
877	/*
878	* Validate, lock and buffer the parameters for the call.
879	* This will calculate the amount of extra space for physical page list.
880	*/
881	rc = vbglR0HGCMInternalPreprocessCall(pCallInfo, cbCallInfo, fIsUser, &ParmInfo, &cbExtra);
882	if (RT_SUCCESS(rc))
883	{
884	/*
885	* Allocate the request buffer and recreate the call request.
886	*/
887	VMMDevHGCMCall *pHGCMCall;
888	rc = VbglGRAlloc((VMMDevRequestHeader **)&pHGCMCall,
889	sizeof(VMMDevHGCMCall) + pCallInfo->cParms * sizeof(HGCMFunctionParameter) + cbExtra,
890	VMMDevReq_HGCMCall);
891	if (RT_SUCCESS(rc))
892	{
893	bool fLeakIt;
894	vbglR0HGCMInternalInitCall(pHGCMCall, pCallInfo, cbCallInfo, fIsUser, &ParmInfo);
895
896	/*
897	* Perform the call.
898	*/
899	rc = vbglR0HGCMInternalDoCall(pHGCMCall, pfnAsyncCallback, pvAsyncData, u32AsyncData, &fLeakIt);
900	if (RT_SUCCESS(rc))
901	{
902	/*
903	* Copy back the result (parameters and buffers that changed).
904	*/
905	rc = vbglR0HGCMInternalCopyBackResult(pCallInfo, pHGCMCall, &ParmInfo, fIsUser, rc);
906	}
907	else
908	{
909	if ( rc != VERR_INTERRUPTED
910	&& rc != VERR_TIMEOUT)
911	{
912	static unsigned s_cErrors = 0;
913	if (s_cErrors++ < 32)
914	LogRel(("VbglR0HGCMInternalCall: vbglR0HGCMInternalDoCall failed. rc=%Rrc\n", rc));
915	}
916	}
917
918	if (!fLeakIt)
919	VbglGRFree(&pHGCMCall->header.header);
920	}
921	}
922	else
923	LogRel(("VbglR0HGCMInternalCall: vbglR0HGCMInternalPreprocessCall failed. rc=%Rrc\n", rc));
924
925	/*
926	* Release locks and free bounce buffers.
927	*/
928	if (ParmInfo.cLockBufs)
929	while (ParmInfo.cLockBufs-- > 0)
930	{
931	RTR0MemObjFree(ParmInfo.aLockBufs[ParmInfo.cLockBufs].hObj, false /fFreeMappings/);
932	#ifdef USE_BOUNCE_BUFFERS
933	RTMemTmpFree(ParmInfo.aLockBufs[ParmInfo.cLockBufs].pvSmallBuf);
934	#endif
935	}
936
937	return rc;
938	}
939
940
941	#if ARCH_BITS == 64
942	DECLR0VBGL(int) VbglR0HGCMInternalCall32(VBoxGuestHGCMCallInfo *pCallInfo, uint32_t cbCallInfo, uint32_t fFlags,
943	PFNVBGLHGCMCALLBACK pfnAsyncCallback, void *pvAsyncData, uint32_t u32AsyncData)
944	{
945	VBoxGuestHGCMCallInfo *pCallInfo64 = NULL;
946	HGCMFunctionParameter *pParm64 = NULL;
947	HGCMFunctionParameter32 *pParm32 = NULL;
948	uint32_t cParms = 0;
949	uint32_t iParm = 0;
950	int rc = VINF_SUCCESS;
951
952	/*
953	* Input validation.
954	*/
955	AssertMsgReturn( !pCallInfo
956	\|\| !pfnAsyncCallback
957	\|\| pCallInfo->cParms > VBOX_HGCM_MAX_PARMS
958	\|\| !(fFlags & ~VBGLR0_HGCMCALL_F_MODE_MASK),
959	("pCallInfo=%p pfnAsyncCallback=%p fFlags=%#x\n", pCallInfo, pfnAsyncCallback, fFlags),
960	VERR_INVALID_PARAMETER);
961	AssertReturn( cbCallInfo >= sizeof(VBoxGuestHGCMCallInfo)
962	\|\| cbCallInfo >= pCallInfo->cParms * sizeof(HGCMFunctionParameter32),
963	VERR_INVALID_PARAMETER);
964
965	/* This Assert does not work on Solaris/Windows 64/32 mixed mode, not sure why, skipping for now */
966	#if !defined(RT_OS_SOLARIS) && !defined(RT_OS_WINDOWS)
967	AssertReturn((fFlags & VBGLR0_HGCMCALL_F_MODE_MASK) == VBGLR0_HGCMCALL_F_KERNEL, VERR_WRONG_ORDER);
968	#endif
969
970	cParms = pCallInfo->cParms;
971	Log(("VbglR0HGCMInternalCall32: cParms=%d, u32Function=%d, fFlags=%#x\n", cParms, pCallInfo->u32Function, fFlags));
972
973	/*
974	* The simple approach, allocate a temporary request and convert the parameters.
975	*/
976	pCallInfo64 = (VBoxGuestHGCMCallInfo )RTMemTmpAllocZ(sizeof(pCallInfo64) + cParms * sizeof(HGCMFunctionParameter));
977	if (!pCallInfo64)
978	return VERR_NO_TMP_MEMORY;
979
980	pCallInfo64 = pCallInfo;
981	pParm32 = VBOXGUEST_HGCM_CALL_PARMS32(pCallInfo);
982	pParm64 = VBOXGUEST_HGCM_CALL_PARMS(pCallInfo64);
983	for (iParm = 0; iParm < cParms; iParm++, pParm32++, pParm64++)
984	{
985	switch (pParm32->type)
986	{
987	case VMMDevHGCMParmType_32bit:
988	pParm64->type = VMMDevHGCMParmType_32bit;
989	pParm64->u.value32 = pParm32->u.value32;
990	break;
991
992	case VMMDevHGCMParmType_64bit:
993	pParm64->type = VMMDevHGCMParmType_64bit;
994	pParm64->u.value64 = pParm32->u.value64;
995	break;
996
997	case VMMDevHGCMParmType_LinAddr_Out:
998	case VMMDevHGCMParmType_LinAddr:
999	case VMMDevHGCMParmType_LinAddr_In:
1000	pParm64->type = pParm32->type;
1001	pParm64->u.Pointer.size = pParm32->u.Pointer.size;
1002	pParm64->u.Pointer.u.linearAddr = pParm32->u.Pointer.u.linearAddr;
1003	break;
1004
1005	default:
1006	rc = VERR_INVALID_PARAMETER;
1007	LogRel(("VbglR0HGCMInternalCall32: pParm32 type %#x invalid.\n", pParm32->type));
1008	break;
1009	}
1010	if (RT_FAILURE(rc))
1011	break;
1012	}
1013	if (RT_SUCCESS(rc))
1014	{
1015	rc = VbglR0HGCMInternalCall(pCallInfo64, sizeof(pCallInfo64) + cParms sizeof(HGCMFunctionParameter), fFlags,
1016	pfnAsyncCallback, pvAsyncData, u32AsyncData);
1017
1018	if (RT_SUCCESS(rc))
1019	{
1020	pCallInfo = pCallInfo64;
1021
1022	/*
1023	* Copy back.
1024	*/
1025	pParm32 = VBOXGUEST_HGCM_CALL_PARMS32(pCallInfo);
1026	pParm64 = VBOXGUEST_HGCM_CALL_PARMS(pCallInfo64);
1027	for (iParm = 0; iParm < cParms; iParm++, pParm32++, pParm64++)
1028	{
1029	switch (pParm64->type)
1030	{
1031	case VMMDevHGCMParmType_32bit:
1032	pParm32->u.value32 = pParm64->u.value32;
1033	break;
1034
1035	case VMMDevHGCMParmType_64bit:
1036	pParm32->u.value64 = pParm64->u.value64;
1037	break;
1038
1039	case VMMDevHGCMParmType_LinAddr_Out:
1040	case VMMDevHGCMParmType_LinAddr:
1041	case VMMDevHGCMParmType_LinAddr_In:
1042	pParm32->u.Pointer.size = pParm64->u.Pointer.size;
1043	break;
1044
1045	default:
1046	LogRel(("VbglR0HGCMInternalCall32: failed invalid pParm32 type %d\n", pParm32->type));
1047	rc = VERR_INTERNAL_ERROR_3;
1048	break;
1049	}
1050	}
1051	}
1052	else
1053	{
1054	static unsigned s_cErrors = 0;
1055	if (s_cErrors++ < 32)
1056	LogRel(("VbglR0HGCMInternalCall32: VbglR0HGCMInternalCall failed. rc=%Rrc\n", rc));
1057	}
1058	}
1059	else
1060	{
1061	static unsigned s_cErrors = 0;
1062	if (s_cErrors++ < 32)
1063	LogRel(("VbglR0HGCMInternalCall32: failed. rc=%Rrc\n", rc));
1064	}
1065
1066	RTMemTmpFree(pCallInfo64);
1067	return rc;
1068	}
1069	#endif /* ARCH_BITS == 64 */
1070
1071	#endif /* VBGL_VBOXGUEST */
1072

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source: vbox/trunk/src/VBox/Additions/common/VBoxGuestLib/HGCMInternal.cpp@ 39693

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