VBoxGuest-os2.cpp@ 10639

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1	/* $Id: VBoxGuest-os2.cpp 8155 2008-04-18 15:16:47Z vboxsync $ */
2	/** @file
3	* VBoxGuest - OS/2 specifics.
4	*/
5
6	/*
7	* Copyright (C) 2007 knut st. osmundsen <[email protected]>
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	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	* Clara, CA 95054 USA or visit http://www.sun.com if you need
19	* additional information or have any questions.
20	* --------------------------------------------------------------------
21	*
22	* This code is based on:
23	*
24	* VBoxDrv - OS/2 specifics.
25	*
26	* Copyright (c) 2007 knut st. osmundsen <[email protected]>
27	*
28	* Permission is hereby granted, free of charge, to any person
29	* obtaining a copy of this software and associated documentation
30	* files (the "Software"), to deal in the Software without
31	* restriction, including without limitation the rights to use,
32	* copy, modify, merge, publish, distribute, sublicense, and/or sell
33	* copies of the Software, and to permit persons to whom the
34	* Software is furnished to do so, subject to the following
35	* conditions:
36	*
37	* The above copyright notice and this permission notice shall be
38	* included in all copies or substantial portions of the Software.
39	*
40	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
41	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
42	* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
43	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
44	* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
45	* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
46	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
47	* OTHER DEALINGS IN THE SOFTWARE.
48	*/
49
50
51	/*******************************************************************************
52	* Header Files *
53	*******************************************************************************/
54	#include <os2ddk/bsekee.h>
55
56	#include "VBoxGuestInternal.h"
57	#include <VBox/VBoxGuest.h>
58	#include <VBox/VBoxDev.h> /* VMMDEV_RAM_SIZE */
59	#include <VBox/version.h>
60	#include <iprt/initterm.h>
61	#include <iprt/string.h>
62	#include <iprt/spinlock.h>
63	#include <iprt/process.h>
64	#include <iprt/assert.h>
65	#include <iprt/log.h>
66	#include <iprt/memobj.h>
67	#include <iprt/mem.h>
68	#include <iprt/param.h>
69
70
71	/*******************************************************************************
72	* Global Variables *
73	*******************************************************************************/
74	/**
75	* Device extention & session data association structure.
76	*/
77	static VBOXGUESTDEVEXT g_DevExt;
78	/** The memory object for the MMIO memory. */
79	static RTR0MEMOBJ g_MemObjMMIO = NIL_RTR0MEMOBJ;
80	/** The memory mapping object the MMIO memory. */
81	static RTR0MEMOBJ g_MemMapMMIO = NIL_RTR0MEMOBJ;
82
83	/** Spinlock protecting g_apSessionHashTab. */
84	static RTSPINLOCK g_Spinlock = NIL_RTSPINLOCK;
85	/** Hash table */
86	static PVBOXGUESTSESSION g_apSessionHashTab[19];
87	/** Calculates the index into g_apSessionHashTab.*/
88	#define SESSION_HASH(sfn) ((sfn) % RT_ELEMENTS(g_apSessionHashTab))
89
90	__BEGIN_DECLS
91	/* Defined in VBoxGuestA-os2.asm */
92	extern uint32_t g_PhysMMIOBase;
93	extern uint32_t g_cbMMIO; /* 0 currently not set. */
94	extern uint16_t g_IOPortBase;
95	extern uint8_t g_bInterruptLine;
96	extern uint8_t g_bPciBusNo;
97	extern uint8_t g_bPciDevFunNo;
98	extern RTFAR16 g_fpfnVBoxGuestOs2IDCService16;
99	extern RTFAR16 g_fpfnVBoxGuestOs2IDCService16Asm;
100	#ifdef DEBUG_READ
101	/* (debugging) */
102	extern uint16_t g_offLogHead;
103	extern uint16_t volatile g_offLogTail;
104	extern uint16_t const g_cchLogMax;
105	extern char g_szLog[];
106	#endif
107	/* (init only:) */
108	extern char g_szInitText[];
109	extern uint16_t g_cchInitText;
110	extern uint16_t g_cchInitTextMax;
111	__END_DECLS
112
113
114	/*******************************************************************************
115	* Internal Functions *
116	*******************************************************************************/
117	static int vboxGuestOS2MapMemory(void);
118	static VBOXOSTYPE vboxGuestOS2DetectVersion(void);
119
120	/* in VBoxGuestA-os2.asm */
121	DECLASM(int) VBoxGuestOS2SetIRQ(uint8_t bIRQ);
122
123
124	/**
125	* 32-bit Ring-0 initialization.
126	*
127	* This is called from VBoxGuestA-os2.asm upon the first open call to the vboxgst$ device.
128	*
129	* @returns 0 on success, non-zero on failure.
130	* @param pszArgs Pointer to the device arguments.
131	*/
132	DECLASM(int) VBoxGuestOS2Init(const char *pszArgs)
133	{
134	Log(("VBoxGuestOS2Init: pszArgs='%s' MMIO=0x%RX32 IOPort=0x%RX16 Int=%#x Bus=%#x Dev=%#x Fun=%d\n",
135	pszArgs, g_PhysMMIOBase, g_IOPortBase, g_bInterruptLine, g_bPciBusNo, g_bPciDevFunNo >> 3, g_bPciDevFunNo & 7));
136
137	/*
138	* Initialize the runtime.
139	*/
140	int rc = RTR0Init(0);
141	if (RT_SUCCESS(rc))
142	{
143	/*
144	* Process the commandline. Later.
145	*/
146	bool fVerbose = true;
147
148	/*
149	* Map the MMIO memory if found.
150	*/
151	rc = vboxGuestOS2MapMemory();
152	if (RT_SUCCESS(rc))
153	{
154	/*
155	* Initialize the device extension.
156	*/
157	if (g_MemMapMMIO != NIL_RTR0MEMOBJ)
158	rc = VBoxGuestInitDevExt(&g_DevExt, g_IOPortBase,
159	RTR0MemObjAddress(g_MemMapMMIO),
160	RTR0MemObjSize(g_MemMapMMIO),
161	vboxGuestOS2DetectVersion());
162	else
163	rc = VBoxGuestInitDevExt(&g_DevExt, g_IOPortBase, NULL, 0,
164	vboxGuestOS2DetectVersion());
165	if (RT_SUCCESS(rc))
166	{
167	/*
168	* Initialize the session hash table.
169	*/
170	rc = RTSpinlockCreate(&g_Spinlock);
171	if (RT_SUCCESS(rc))
172	{
173	/*
174	* Configure the interrupt handler.
175	*/
176	if (g_bInterruptLine)
177	{
178	rc = VBoxGuestOS2SetIRQ(g_bInterruptLine);
179	if (rc)
180	{
181	Log(("VBoxGuestOS2SetIRQ(%d) -> %d\n", g_bInterruptLine, rc));
182	rc = RTErrConvertFromOS2(rc);
183	}
184	}
185	if (RT_SUCCESS(rc))
186	{
187	/*
188	* Success
189	*/
190	if (fVerbose)
191	{
192	strcpy(&g_szInitText[0],
193	"\r\n"
194	"VirtualBox Guest Additions Driver for OS/2 version " VBOX_VERSION_STRING "\r\n"
195	"Copyright (C) 2008 Sun Microsystems, Inc.\r\n");
196	g_cchInitText = strlen(&g_szInitText[0]);
197	}
198	Log(("VBoxGuestOS2Init: Successfully loaded\n%s", g_szInitText));
199	return VINF_SUCCESS;
200	}
201
202	g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxGuest.sys: SetIrq failed for IRQ %#d, rc=%Vrc\n",
203	g_bInterruptLine, rc);
204	}
205	else
206	g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxGuest.sys: RTSpinlockCreate failed, rc=%Vrc\n", rc);
207	VBoxGuestDeleteDevExt(&g_DevExt);
208	}
209	else
210	g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxGuest.sys: VBoxGuestOS2InitDevExt failed, rc=%Vrc\n", rc);
211
212	int rc2 = RTR0MemObjFree(g_MemObjMMIO, true /* fFreeMappings */); AssertRC(rc2);
213	g_MemObjMMIO = g_MemMapMMIO = NIL_RTR0MEMOBJ;
214	}
215	else
216	g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxGuest.sys: VBoxGuestOS2MapMMIO failed, rc=%Vrc\n", rc);
217	RTR0Term();
218	}
219	else
220	g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxGuest.sys: RTR0Init failed, rc=%Vrc\n", rc);
221
222	RTLogBackdoorPrintf("VBoxGuestOS2Init: failed rc=%Vrc - %s", rc, &g_szInitText[0]);
223	return rc;
224	}
225
226
227	/**
228	* Maps the VMMDev memory.
229	*
230	* @returns VBox status code.
231	* @retval VERR_VERSION_MISMATCH The VMMDev memory didn't meet our expectations.
232	*
233	* @param pDevExt The device extension.
234	*/
235	static int vboxGuestOS2MapMemory(void)
236	{
237	const RTCCPHYS PhysMMIOBase = g_PhysMMIOBase;
238
239	/*
240	* Did we find any MMIO region (0 or NIL)?
241	*/
242	if ( !PhysMMIOBase
243	\|\| PhysMMIOBase == NIL_RTCCPHYS)
244	{
245	Assert(g_MemMapMMIO != NIL_RTR0MEMOBJ);
246	return VINF_SUCCESS;
247	}
248
249	/*
250	* Create a physical memory object for it.
251	*
252	* Since we don't know the actual size (OS/2 doesn't at least), we make
253	* a qualified guess using the VMMDEV_RAM_SIZE.
254	*/
255	size_t cb = RT_ALIGN_Z(VMMDEV_RAM_SIZE, PAGE_SIZE);
256	int rc = RTR0MemObjEnterPhys(&g_MemObjMMIO, PhysMMIOBase, cb);
257	if (RT_FAILURE(rc))
258	{
259	cb = _4K;
260	rc = RTR0MemObjEnterPhys(&g_MemObjMMIO, PhysMMIOBase, cb);
261	}
262	if (RT_FAILURE(rc))
263	{
264	Log(("vboxGuestOS2MapMemory: RTR0MemObjEnterPhys(,%RCp,%zx) -> %Rrc\n",
265	PhysMMIOBase, cb, rc));
266	return rc;
267	}
268
269	/*
270	* Map the object into kernel space.
271	*
272	* We want a normal mapping with normal caching, which good in two ways. First
273	* since the API doesn't have any flags indicating how the mapping should be cached.
274	* And second, because PGM doesn't necessarily respect the cache/writethru bits
275	* anyway for normal RAM.
276	*/
277	rc = RTR0MemObjMapKernel(&g_MemMapMMIO, g_MemObjMMIO, (void *)-1, 0,
278	RTMEM_PROT_READ \| RTMEM_PROT_WRITE);
279	if (RT_SUCCESS(rc))
280	{
281	/*
282	* Validate the VMM memory.
283	*/
284	VMMDevMemory pVMMDev = (VMMDevMemory )RTR0MemObjAddress(g_MemMapMMIO);
285	Assert(pVMMDev);
286	if ( pVMMDev->u32Version == VMMDEV_MEMORY_VERSION
287	&& pVMMDev->u32Size >= 32 /* just for checking sanity */)
288	{
289	/*
290	* Did we hit the the correct size? If not we'll have to
291	* redo the mapping using the correct size.
292	*/
293	if (RT_ALIGN_32(pVMMDev->u32Size, PAGE_SIZE) == cb)
294	return VINF_SUCCESS;
295
296	Log(("vboxGuestOS2MapMemory: Actual size %#RX32 (tried %#zx)\n", pVMMDev->u32Size, cb));
297	cb = RT_ALIGN_32(pVMMDev->u32Size, PAGE_SIZE);
298
299	rc = RTR0MemObjFree(g_MemObjMMIO, true); AssertRC(rc);
300	g_MemObjMMIO = g_MemMapMMIO = NIL_RTR0MEMOBJ;
301
302	rc = RTR0MemObjEnterPhys(&g_MemObjMMIO, PhysMMIOBase, cb);
303	if (RT_SUCCESS(rc))
304	{
305	rc = RTR0MemObjMapKernel(&g_MemMapMMIO, g_MemObjMMIO, (void *)-1, 0,
306	RTMEM_PROT_READ \| RTMEM_PROT_WRITE);
307	if (RT_SUCCESS(rc))
308	return VINF_SUCCESS;
309
310	Log(("vboxGuestOS2MapMemory: RTR0MemObjMapKernel [%RCp,%zx] -> %Rrc (2nd)\n",
311	PhysMMIOBase, cb, rc));
312	}
313	else
314	Log(("vboxGuestOS2MapMemory: RTR0MemObjEnterPhys(,%RCp,%zx) -> %Rrc (2nd)\n",
315	PhysMMIOBase, cb, rc));
316	}
317	else
318	{
319	rc = VERR_VERSION_MISMATCH;
320	LogRel(("vboxGuestOS2MapMemory: Bogus VMMDev memory; u32Version=%RX32 (expected %RX32) u32Size=%RX32\n",
321	pVMMDev->u32Version, VMMDEV_MEMORY_VERSION, pVMMDev->u32Size));
322	}
323	}
324	else
325	Log(("vboxGuestOS2MapMemory: RTR0MemObjMapKernel [%RCp,%zx] -> %Rrc\n",
326	PhysMMIOBase, cb, rc));
327
328	int rc2 = RTR0MemObjFree(g_MemObjMMIO, true /* fFreeMappings */); AssertRC(rc2);
329	g_MemObjMMIO = g_MemMapMMIO = NIL_RTR0MEMOBJ;
330	return rc;
331	}
332
333
334	/**
335	* Called fromn VBoxGuestOS2Init to determin which OS/2 version this is.
336	*
337	* @returns VBox OS/2 type.
338	*/
339	static VBOXOSTYPE vboxGuestOS2DetectVersion(void)
340	{
341	VBOXOSTYPE enmOSType = VBOXOSTYPE_OS2;
342
343	#if 0 /** @todo dig up the version stuff from GIS later and verify that the numbers are actually decimal. */
344	unsigned uMajor, uMinor;
345	if (uMajor == 2)
346	{
347	if (uMinor >= 30 && uMinor < 40)
348	enmOSType = VBOXOSTYPE_OS2Warp3;
349	else if (uMinor >= 40 && uMinor < 45)
350	enmOSType = VBOXOSTYPE_OS2Warp4;
351	else if (uMinor >= 45 && uMinor < 50)
352	enmOSType = VBOXOSTYPE_OS2Warp45;
353	}
354	#endif
355	return enmOSType;
356	}
357
358
359	DECLASM(int) VBoxGuestOS2Open(uint16_t sfn)
360	{
361	int rc;
362	PVBOXGUESTSESSION pSession;
363
364	/*
365	* Create a new session.
366	*/
367	rc = VBoxGuestCreateUserSession(&g_DevExt, &pSession);
368	if (RT_SUCCESS(rc))
369	{
370	pSession->sfn = sfn;
371
372	/*
373	* Insert it into the hash table.
374	*/
375	unsigned iHash = SESSION_HASH(sfn);
376	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
377	RTSpinlockAcquireNoInts(g_Spinlock, &Tmp);
378	pSession->pNextHash = g_apSessionHashTab[iHash];
379	g_apSessionHashTab[iHash] = pSession;
380	RTSpinlockReleaseNoInts(g_Spinlock, &Tmp);
381	}
382
383	Log(("VBoxGuestOS2Open: g_DevExt=%p pSession=%p rc=%d pid=%d\n", &g_DevExt, pSession, rc, (int)RTProcSelf()));
384	return rc;
385	}
386
387
388	DECLASM(int) VBoxGuestOS2Close(uint16_t sfn)
389	{
390	Log(("VBoxGuestOS2Close: pid=%d sfn=%d\n", (int)RTProcSelf(), sfn));
391
392	/*
393	* Remove from the hash table.
394	*/
395	PVBOXGUESTSESSION pSession;
396	const RTPROCESS Process = RTProcSelf();
397	const unsigned iHash = SESSION_HASH(sfn);
398	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
399	RTSpinlockAcquireNoInts(g_Spinlock, &Tmp);
400
401	pSession = g_apSessionHashTab[iHash];
402	if (pSession)
403	{
404	if ( pSession->sfn == sfn
405	&& pSession->Process == Process)
406	{
407	g_apSessionHashTab[iHash] = pSession->pNextHash;
408	pSession->pNextHash = NULL;
409	}
410	else
411	{
412	PVBOXGUESTSESSION pPrev = pSession;
413	pSession = pSession->pNextHash;
414	while (pSession)
415	{
416	if ( pSession->sfn == sfn
417	&& pSession->Process == Process)
418	{
419	pPrev->pNextHash = pSession->pNextHash;
420	pSession->pNextHash = NULL;
421	break;
422	}
423
424	/* next */
425	pPrev = pSession;
426	pSession = pSession->pNextHash;
427	}
428	}
429	}
430	RTSpinlockReleaseNoInts(g_Spinlock, &Tmp);
431	if (!pSession)
432	{
433	Log(("VBoxGuestIoctl: WHUT?!? pSession == NULL! This must be a mistake... pid=%d sfn=%d\n", (int)Process, sfn));
434	return VERR_INVALID_PARAMETER;
435	}
436
437	/*
438	* Close the session.
439	*/
440	VBoxGuestCloseSession(&g_DevExt, pSession);
441	return 0;
442	}
443
444
445	DECLASM(int) VBoxGuestOS2IOCtlFast(uint16_t sfn, uint8_t iFunction, int32_t *prc)
446	{
447	/*
448	* Find the session.
449	*/
450	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
451	const RTPROCESS Process = RTProcSelf();
452	const unsigned iHash = SESSION_HASH(sfn);
453	PVBOXGUESTSESSION pSession;
454
455	RTSpinlockAcquireNoInts(g_Spinlock, &Tmp);
456	pSession = g_apSessionHashTab[iHash];
457	if (pSession && pSession->Process != Process)
458	{
459	do pSession = pSession->pNextHash;
460	while ( pSession
461	&& ( pSession->sfn != sfn
462	\|\| pSession->Process != Process));
463	}
464	RTSpinlockReleaseNoInts(g_Spinlock, &Tmp);
465	if (RT_UNLIKELY(!pSession))
466	{
467	Log(("VBoxGuestIoctl: WHAT?!? pSession == NULL! This must be a mistake... pid=%d\n", (int)Process));
468	return VERR_INVALID_PARAMETER;
469	}
470
471	/*
472	* Dispatch the fast IOCtl.
473	*/
474	*prc = VBoxGuestCommonIOCtlFast(iFunction, &g_DevExt, pSession);
475	return 0;
476	}
477
478
479	/**
480	* 32-bit IDC service routine.
481	*
482	* @returns VBox status code.
483	* @param u32Session The session handle (PVBOXGUESTSESSION).
484	* @param iFunction The requested function.
485	* @param pvData The input/output data buffer. The caller ensures that this
486	* cannot be swapped out, or that it's acceptable to take a
487	* page in fault in the current context. If the request doesn't
488	* take input or produces output, apssing NULL is okay.
489	* @param cbData The size of the data buffer.
490	* @param pcbDataReturned Where to store the amount of data that's returned.
491	* This can be NULL if pvData is NULL.
492	*
493	* @remark This is called from the 16-bit thunker as well as directly from the 32-bit clients.
494	*/
495	DECLASM(int) VBoxGuestOS2IDCService(uint32_t u32Session, unsigned iFunction, void pvData, size_t cbData, size_t pcbDataReturned)
496	{
497	PVBOXGUESTSESSION pSession = (PVBOXGUESTSESSION)u32Session;
498	AssertPtrReturn(pSession, VERR_INVALID_POINTER);
499	AssertMsgReturn(pSession->sfn == 0xffff, ("%RX16\n", pSession->sfn), VERR_INVALID_HANDLE);
500	AssertMsgReturn(pSession->pDevExt == &g_DevExt, ("%p != %p\n", pSession->pDevExt, &g_DevExt), VERR_INVALID_HANDLE);
501
502	int rc;
503	switch (iFunction)
504	{
505	default:
506	rc = VBoxGuestCommonIOCtl(iFunction, &g_DevExt, pSession, pvData, cbData, pcbDataReturned);
507	break;
508
509	case VBOXGUEST_IOCTL_OS2_IDC_DISCONNECT:
510	pSession->sfn = 0;
511	VBoxGuestCloseSession(&g_DevExt, pSession);
512	rc = VINF_SUCCESS;
513	break;
514	}
515	return rc;
516	}
517
518
519	/**
520	* Worker for VBoxGuestOS2IDC, it creates the kernel session.
521	*
522	* @returns Pointer to the session.
523	*/
524	DECLASM(PVBOXGUESTSESSION) VBoxGuestOS2IDCConnect(void)
525	{
526	PVBOXGUESTSESSION pSession;
527	int rc = VBoxGuestCreateKernelSession(&g_DevExt, &pSession);
528	if (RT_SUCCESS(rc))
529	{
530	pSession->sfn = 0xffff;
531	return pSession;
532	}
533	return NULL;
534	}
535
536
537	DECLASM(int) VBoxGuestOS2IOCtl(uint16_t sfn, uint8_t iCat, uint8_t iFunction, void pvParm, void pvData, uint16_t pcbParm, uint16_t pcbData)
538	{
539	/*
540	* Find the session.
541	*/
542	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
543	const RTPROCESS Process = RTProcSelf();
544	const unsigned iHash = SESSION_HASH(sfn);
545	PVBOXGUESTSESSION pSession;
546
547	RTSpinlockAcquireNoInts(g_Spinlock, &Tmp);
548	pSession = g_apSessionHashTab[iHash];
549	if (pSession && pSession->Process != Process)
550	{
551	do pSession = pSession->pNextHash;
552	while ( pSession
553	&& ( pSession->sfn != sfn
554	\|\| pSession->Process != Process));
555	}
556	RTSpinlockReleaseNoInts(g_Spinlock, &Tmp);
557	if (!pSession)
558	{
559	Log(("VBoxGuestIoctl: WHAT?!? pSession == NULL! This must be a mistake... pid=%d\n", (int)Process));
560	return VERR_INVALID_PARAMETER;
561	}
562
563	/*
564	* Verify the category and dispatch the IOCtl.
565	*
566	* The IOCtl call uses the parameter buffer as generic data input/output
567	* buffer similar to the one unix ioctl buffer argument. While the data
568	* buffer is used for passing the VBox status code back to the caller
569	* since the status codes that OS/2 accepts thru the DosDevIOCtl API is
570	* severely restricted.
571	*/
572	if (RT_LIKELY(iCat == VBOXGUEST_IOCTL_CATEGORY))
573	{
574	Log(("VBoxGuestOS2IOCtl: pSession=%p iFunction=%#x pvParm=%p pvData=%p pcbParm=%d pcbData=%d\n", pSession, iFunction, pvParm, pvData, pcbParm, pcbData));
575	Assert(pvParm \|\| !*pcbData);
576	Assert(pvData);
577	Assert(pcbData == sizeof(int32_t)); / the return code */
578
579	/*
580	* Lock the buffers.
581	*/
582	int32_t rc;
583	KernVMLock_t ParmLock;
584	if (pvParm)
585	{
586	Assert(*pcbData);
587	rc = KernVMLock(VMDHL_WRITE, pvParm, pcbParm, &ParmLock, (KernPageList_t )-1, NULL);
588	AssertMsgReturn(!rc, ("KernVMLock(VMDHL_WRITE, %p, %#x, &p, NULL, NULL) -> %d\n", pvParm, *pcbParm, &ParmLock, rc), VERR_LOCK_FAILED);
589	}
590
591	#if 0 /* don't bother locking it since it's only 4 bytes (the return code). */
592	KernVMLock_t DataLock;
593	if (pvData)
594	{
595	Assert(*pcbData);
596	rc = KernVMLock(VMDHL_WRITE, pvData, pcbData, &DataLock, (KernPageList_t )-1, NULL);
597	if (rc)
598	{
599	AssertMsgFailed(("KernVMLock(VMDHL_WRITE, %p, %#x, &p, NULL, NULL) -> %d\n", pvData, *pcbData, &DataLock, rc));
600	KernVMUnlock(&ParmLock);
601	return VERR_LOCK_FAILED;
602	}
603	}
604	#endif
605
606	/*
607	* Process the IOCtl.
608	*/
609	size_t cbDataReturned = 0;
610	rc = VBoxGuestCommonIOCtl(iFunction, &g_DevExt, pSession,
611	pvParm, *pcbParm, &cbDataReturned);
612
613	/*
614	* Unlock the buffers.
615	*/
616	if (pvParm)
617	{
618	int rc2 = KernVMUnlock(&ParmLock);
619	AssertMsg(!rc2, ("rc2=%d\n", rc2)); NOREF(rc2);
620	AssertMsg(cbDataReturned < _64K, ("cbDataReturned=%d\n", cbDataReturned));
621	*pcbParm = cbDataReturned;
622	}
623	#if 0
624	if (pvData)
625	{
626	int rc2 = KernVMUnlock(&DataLock);
627	AssertMsg(!rc2, ("rc2=%d\n", rc2));
628	}
629	#else
630	rc = KernCopyOut(pvData, &rc, sizeof(int32_t));
631	AssertMsgReturn(!rc, ("KernCopyOut(%p, %p, sizeof(int32_t)) -> %d\n", pvData, &rc, rc), VERR_LOCK_FAILED);
632	#endif
633
634	Log2(("VBoxGuestOS2IOCtl: returns VINF_SUCCESS / %d\n", rc));
635	return VINF_SUCCESS;
636	}
637	return VERR_NOT_SUPPORTED;
638	}
639
640
641	/**
642	* 32-bit ISR, called by 16-bit assembly thunker in VBoxGuestA-os2.asm.
643	*
644	* @returns true if it's our interrupt, false it isn't.
645	*/
646	DECLASM(bool) VBoxGuestOS2ISR(void)
647	{
648	Log(("VBoxGuestOS2ISR\n"));
649
650	return VBoxGuestCommonISR(&g_DevExt);
651	}
652
653
654	#ifdef DEBUG_READ /** @todo figure out this one once and for all... */
655
656	/**
657	* Callback for writing to the log buffer.
658	*
659	* @returns number of bytes written.
660	* @param pvArg Unused.
661	* @param pachChars Pointer to an array of utf-8 characters.
662	* @param cbChars Number of bytes in the character array pointed to by pachChars.
663	*/
664	static DECLCALLBACK(size_t) vboxGuestNativeLogOutput(void pvArg, const char pachChars, size_t cbChars)
665	{
666	size_t cchWritten = 0;
667	while (cbChars-- > 0)
668	{
669	const uint16_t offLogHead = g_offLogHead;
670	const uint16_t offLogHeadNext = (offLogHead + 1) & (g_cchLogMax - 1);
671	if (offLogHeadNext == g_offLogTail)
672	break; /* no */
673	g_szLog[offLogHead] = *pachChars++;
674	g_offLogHead = offLogHeadNext;
675	cchWritten++;
676	}
677	return cchWritten;
678	}
679
680
681	int SUPR0Printf(const char *pszFormat, ...)
682	{
683	va_list va;
684
685	#if 0 //def DEBUG_bird
686	va_start(va, pszFormat);
687	RTLogComPrintfV(pszFormat, va);
688	va_end(va);
689	#endif
690
691	va_start(va, pszFormat);
692	int cch = RTLogFormatV(vboxGuestNativeLogOutput, NULL, pszFormat, va);
693	va_end(va);
694
695	return cch;
696	}
697
698	#endif /* DEBUG_READ */
699

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source: vbox/trunk/src/VBox/Additions/common/VBoxGuest/VBoxGuest-os2.cpp@ 10639

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