VBoxGuest-os2.cpp@ 42154

Last change on this file since 42154 was 40806, checked in by vboxsync, 13 years ago
RTSpinlock: Redid the interface, eliminating NoInts and Tmp. Whether a spinlock is interrupt safe or not is now defined at creation time, preventing stupid bugs arrising from calling the wrong acquire and/or release methods somewhere. The saved flags are stored in the spinlock strucutre, eliminating the annoying Tmp variable. Needs testing on each platform before fixing the build burn.
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File size: 23.2 KB

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1	/* $Id: VBoxGuest-os2.cpp 40806 2012-04-06 21:05:19Z 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	*
18	* This code is based on:
19	*
20	* VBoxDrv - OS/2 specifics.
21	*
22	* Copyright (c) 2007 knut st. osmundsen <[email protected]>
23	*
24	* Permission is hereby granted, free of charge, to any person
25	* obtaining a copy of this software and associated documentation
26	* files (the "Software"), to deal in the Software without
27	* restriction, including without limitation the rights to use,
28	* copy, modify, merge, publish, distribute, sublicense, and/or sell
29	* copies of the Software, and to permit persons to whom the
30	* Software is furnished to do so, subject to the following
31	* conditions:
32	*
33	* The above copyright notice and this permission notice shall be
34	* included in all copies or substantial portions of the Software.
35	*
36	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
37	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
38	* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
39	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
40	* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
41	* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
42	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
43	* OTHER DEALINGS IN THE SOFTWARE.
44	*/
45
46
47	/*******************************************************************************
48	* Header Files *
49	*******************************************************************************/
50	#include <os2ddk/bsekee.h>
51
52	#include "VBoxGuestInternal.h"
53	#include <VBox/version.h>
54	#include <iprt/initterm.h>
55	#include <iprt/string.h>
56	#include <iprt/spinlock.h>
57	#include <iprt/process.h>
58	#include <iprt/assert.h>
59	#include <iprt/log.h>
60	#include <iprt/memobj.h>
61	#include <iprt/mem.h>
62	#include <iprt/param.h>
63
64
65	/*******************************************************************************
66	* Global Variables *
67	*******************************************************************************/
68	/**
69	* Device extention & session data association structure.
70	*/
71	static VBOXGUESTDEVEXT g_DevExt;
72	/** The memory object for the MMIO memory. */
73	static RTR0MEMOBJ g_MemObjMMIO = NIL_RTR0MEMOBJ;
74	/** The memory mapping object the MMIO memory. */
75	static RTR0MEMOBJ g_MemMapMMIO = NIL_RTR0MEMOBJ;
76
77	/** Spinlock protecting g_apSessionHashTab. */
78	static RTSPINLOCK g_Spinlock = NIL_RTSPINLOCK;
79	/** Hash table */
80	static PVBOXGUESTSESSION g_apSessionHashTab[19];
81	/** Calculates the index into g_apSessionHashTab.*/
82	#define SESSION_HASH(sfn) ((sfn) % RT_ELEMENTS(g_apSessionHashTab))
83
84	RT_C_DECLS_BEGIN
85	/* Defined in VBoxGuestA-os2.asm */
86	extern uint32_t g_PhysMMIOBase;
87	extern uint32_t g_cbMMIO; /* 0 currently not set. */
88	extern uint16_t g_IOPortBase;
89	extern uint8_t g_bInterruptLine;
90	extern uint8_t g_bPciBusNo;
91	extern uint8_t g_bPciDevFunNo;
92	extern RTFAR16 g_fpfnVBoxGuestOs2IDCService16;
93	extern RTFAR16 g_fpfnVBoxGuestOs2IDCService16Asm;
94	#ifdef DEBUG_READ
95	/* (debugging) */
96	extern uint16_t g_offLogHead;
97	extern uint16_t volatile g_offLogTail;
98	extern uint16_t const g_cchLogMax;
99	extern char g_szLog[];
100	#endif
101	/* (init only:) */
102	extern char g_szInitText[];
103	extern uint16_t g_cchInitText;
104	extern uint16_t g_cchInitTextMax;
105	RT_C_DECLS_END
106
107
108	/*******************************************************************************
109	* Internal Functions *
110	*******************************************************************************/
111	static int vboxGuestOS2MapMemory(void);
112	static VBOXOSTYPE vboxGuestOS2DetectVersion(void);
113
114	/* in VBoxGuestA-os2.asm */
115	DECLASM(int) VBoxGuestOS2SetIRQ(uint8_t bIRQ);
116
117
118	/**
119	* 32-bit Ring-0 initialization.
120	*
121	* This is called from VBoxGuestA-os2.asm upon the first open call to the vboxgst$ device.
122	*
123	* @returns 0 on success, non-zero on failure.
124	* @param pszArgs Pointer to the device arguments.
125	*/
126	DECLASM(int) VBoxGuestOS2Init(const char *pszArgs)
127	{
128	Log(("VBoxGuestOS2Init: pszArgs='%s' MMIO=0x%RX32 IOPort=0x%RX16 Int=%#x Bus=%#x Dev=%#x Fun=%d\n",
129	pszArgs, g_PhysMMIOBase, g_IOPortBase, g_bInterruptLine, g_bPciBusNo, g_bPciDevFunNo >> 3, g_bPciDevFunNo & 7));
130
131	/*
132	* Initialize the runtime.
133	*/
134	int rc = RTR0Init(0);
135	if (RT_SUCCESS(rc))
136	{
137	/*
138	* Process the commandline. Later.
139	*/
140	bool fVerbose = true;
141
142	/*
143	* Map the MMIO memory if found.
144	*/
145	rc = vboxGuestOS2MapMemory();
146	if (RT_SUCCESS(rc))
147	{
148	/*
149	* Initialize the device extension.
150	*/
151	if (g_MemMapMMIO != NIL_RTR0MEMOBJ)
152	rc = VBoxGuestInitDevExt(&g_DevExt, g_IOPortBase,
153	RTR0MemObjAddress(g_MemMapMMIO),
154	RTR0MemObjSize(g_MemMapMMIO),
155	vboxGuestOS2DetectVersion(),
156	0);
157	else
158	rc = VBoxGuestInitDevExt(&g_DevExt, g_IOPortBase, NULL, 0,
159	vboxGuestOS2DetectVersion(),
160	0);
161	if (RT_SUCCESS(rc))
162	{
163	/*
164	* Initialize the session hash table.
165	*/
166	rc = RTSpinlockCreate(&g_Spinlock, RTSPINLOCK_FLAGS_INTERRUPT_SAFE, "VBoxGuestOS2");
167	if (RT_SUCCESS(rc))
168	{
169	/*
170	* Configure the interrupt handler.
171	*/
172	if (g_bInterruptLine)
173	{
174	rc = VBoxGuestOS2SetIRQ(g_bInterruptLine);
175	if (rc)
176	{
177	Log(("VBoxGuestOS2SetIRQ(%d) -> %d\n", g_bInterruptLine, rc));
178	rc = RTErrConvertFromOS2(rc);
179	}
180	}
181	if (RT_SUCCESS(rc))
182	{
183	/*
184	* Success
185	*/
186	if (fVerbose)
187	{
188	strcpy(&g_szInitText[0],
189	"\r\n"
190	"VirtualBox Guest Additions Driver for OS/2 version " VBOX_VERSION_STRING "\r\n"
191	"Copyright (C) 2008-2010 Oracle Corporation\r\n");
192	g_cchInitText = strlen(&g_szInitText[0]);
193	}
194	Log(("VBoxGuestOS2Init: Successfully loaded\n%s", g_szInitText));
195	return VINF_SUCCESS;
196	}
197
198	g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxGuest.sys: SetIrq failed for IRQ %#d, rc=%Rrc\n",
199	g_bInterruptLine, rc);
200	}
201	else
202	g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxGuest.sys: RTSpinlockCreate failed, rc=%Rrc\n", rc);
203	VBoxGuestDeleteDevExt(&g_DevExt);
204	}
205	else
206	g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxGuest.sys: VBoxGuestOS2InitDevExt failed, rc=%Rrc\n", rc);
207
208	int rc2 = RTR0MemObjFree(g_MemObjMMIO, true /* fFreeMappings */); AssertRC(rc2);
209	g_MemObjMMIO = g_MemMapMMIO = NIL_RTR0MEMOBJ;
210	}
211	else
212	g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxGuest.sys: VBoxGuestOS2MapMMIO failed, rc=%Rrc\n", rc);
213	RTR0Term();
214	}
215	else
216	g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxGuest.sys: RTR0Init failed, rc=%Rrc\n", rc);
217
218	RTLogBackdoorPrintf("VBoxGuestOS2Init: failed rc=%Rrc - %s", rc, &g_szInitText[0]);
219	return rc;
220	}
221
222
223	/**
224	* Maps the VMMDev memory.
225	*
226	* @returns VBox status code.
227	* @retval VERR_VERSION_MISMATCH The VMMDev memory didn't meet our expectations.
228	*
229	* @param pDevExt The device extension.
230	*/
231	static int vboxGuestOS2MapMemory(void)
232	{
233	const RTCCPHYS PhysMMIOBase = g_PhysMMIOBase;
234
235	/*
236	* Did we find any MMIO region (0 or NIL)?
237	*/
238	if ( !PhysMMIOBase
239	\|\| PhysMMIOBase == NIL_RTCCPHYS)
240	{
241	Assert(g_MemMapMMIO != NIL_RTR0MEMOBJ);
242	return VINF_SUCCESS;
243	}
244
245	/*
246	* Create a physical memory object for it.
247	*
248	* Since we don't know the actual size (OS/2 doesn't at least), we make
249	* a qualified guess using the VMMDEV_RAM_SIZE.
250	*/
251	size_t cb = RT_ALIGN_Z(VMMDEV_RAM_SIZE, PAGE_SIZE);
252	int rc = RTR0MemObjEnterPhys(&g_MemObjMMIO, PhysMMIOBase, cb, RTMEM_CACHE_POLICY_DONT_CARE);
253	if (RT_FAILURE(rc))
254	{
255	cb = _4K;
256	rc = RTR0MemObjEnterPhys(&g_MemObjMMIO, PhysMMIOBase, cb, RTMEM_CACHE_POLICY_DONT_CARE);
257	}
258	if (RT_FAILURE(rc))
259	{
260	Log(("vboxGuestOS2MapMemory: RTR0MemObjEnterPhys(,%RCp,%zx) -> %Rrc\n",
261	PhysMMIOBase, cb, rc));
262	return rc;
263	}
264
265	/*
266	* Map the object into kernel space.
267	*
268	* We want a normal mapping with normal caching, which good in two ways. First
269	* since the API doesn't have any flags indicating how the mapping should be cached.
270	* And second, because PGM doesn't necessarily respect the cache/writethru bits
271	* anyway for normal RAM.
272	*/
273	rc = RTR0MemObjMapKernel(&g_MemMapMMIO, g_MemObjMMIO, (void *)-1, 0,
274	RTMEM_PROT_READ \| RTMEM_PROT_WRITE);
275	if (RT_SUCCESS(rc))
276	{
277	/*
278	* Validate the VMM memory.
279	*/
280	VMMDevMemory pVMMDev = (VMMDevMemory )RTR0MemObjAddress(g_MemMapMMIO);
281	Assert(pVMMDev);
282	if ( pVMMDev->u32Version == VMMDEV_MEMORY_VERSION
283	&& pVMMDev->u32Size >= 32 /* just for checking sanity */)
284	{
285	/*
286	* Did we hit the correct size? If not we'll have to
287	* redo the mapping using the correct size.
288	*/
289	if (RT_ALIGN_32(pVMMDev->u32Size, PAGE_SIZE) == cb)
290	return VINF_SUCCESS;
291
292	Log(("vboxGuestOS2MapMemory: Actual size %#RX32 (tried %#zx)\n", pVMMDev->u32Size, cb));
293	cb = RT_ALIGN_32(pVMMDev->u32Size, PAGE_SIZE);
294
295	rc = RTR0MemObjFree(g_MemObjMMIO, true); AssertRC(rc);
296	g_MemObjMMIO = g_MemMapMMIO = NIL_RTR0MEMOBJ;
297
298	rc = RTR0MemObjEnterPhys(&g_MemObjMMIO, PhysMMIOBase, cb, RTMEM_CACHE_POLICY_DONT_CARE);
299	if (RT_SUCCESS(rc))
300	{
301	rc = RTR0MemObjMapKernel(&g_MemMapMMIO, g_MemObjMMIO, (void *)-1, 0,
302	RTMEM_PROT_READ \| RTMEM_PROT_WRITE);
303	if (RT_SUCCESS(rc))
304	return VINF_SUCCESS;
305
306	Log(("vboxGuestOS2MapMemory: RTR0MemObjMapKernel [%RCp,%zx] -> %Rrc (2nd)\n",
307	PhysMMIOBase, cb, rc));
308	}
309	else
310	Log(("vboxGuestOS2MapMemory: RTR0MemObjEnterPhys(,%RCp,%zx) -> %Rrc (2nd)\n",
311	PhysMMIOBase, cb, rc));
312	}
313	else
314	{
315	rc = VERR_VERSION_MISMATCH;
316	LogRel(("vboxGuestOS2MapMemory: Bogus VMMDev memory; u32Version=%RX32 (expected %RX32) u32Size=%RX32\n",
317	pVMMDev->u32Version, VMMDEV_MEMORY_VERSION, pVMMDev->u32Size));
318	}
319	}
320	else
321	Log(("vboxGuestOS2MapMemory: RTR0MemObjMapKernel [%RCp,%zx] -> %Rrc\n",
322	PhysMMIOBase, cb, rc));
323
324	int rc2 = RTR0MemObjFree(g_MemObjMMIO, true /* fFreeMappings */); AssertRC(rc2);
325	g_MemObjMMIO = g_MemMapMMIO = NIL_RTR0MEMOBJ;
326	return rc;
327	}
328
329
330	/**
331	* Called fromn VBoxGuestOS2Init to determine which OS/2 version this is.
332	*
333	* @returns VBox OS/2 type.
334	*/
335	static VBOXOSTYPE vboxGuestOS2DetectVersion(void)
336	{
337	VBOXOSTYPE enmOSType = VBOXOSTYPE_OS2;
338
339	#if 0 /** @todo dig up the version stuff from GIS later and verify that the numbers are actually decimal. */
340	unsigned uMajor, uMinor;
341	if (uMajor == 2)
342	{
343	if (uMinor >= 30 && uMinor < 40)
344	enmOSType = VBOXOSTYPE_OS2Warp3;
345	else if (uMinor >= 40 && uMinor < 45)
346	enmOSType = VBOXOSTYPE_OS2Warp4;
347	else if (uMinor >= 45 && uMinor < 50)
348	enmOSType = VBOXOSTYPE_OS2Warp45;
349	}
350	#endif
351	return enmOSType;
352	}
353
354
355	DECLASM(int) VBoxGuestOS2Open(uint16_t sfn)
356	{
357	int rc;
358	PVBOXGUESTSESSION pSession;
359
360	/*
361	* Create a new session.
362	*/
363	rc = VBoxGuestCreateUserSession(&g_DevExt, &pSession);
364	if (RT_SUCCESS(rc))
365	{
366	pSession->sfn = sfn;
367
368	/*
369	* Insert it into the hash table.
370	*/
371	unsigned iHash = SESSION_HASH(sfn);
372	RTSpinlockAcquire(g_Spinlock);
373	pSession->pNextHash = g_apSessionHashTab[iHash];
374	g_apSessionHashTab[iHash] = pSession;
375	RTSpinlockReleaseNoInts(g_Spinlock);
376	}
377
378	Log(("VBoxGuestOS2Open: g_DevExt=%p pSession=%p rc=%d pid=%d\n", &g_DevExt, pSession, rc, (int)RTProcSelf()));
379	return rc;
380	}
381
382
383	DECLASM(int) VBoxGuestOS2Close(uint16_t sfn)
384	{
385	Log(("VBoxGuestOS2Close: pid=%d sfn=%d\n", (int)RTProcSelf(), sfn));
386
387	/*
388	* Remove from the hash table.
389	*/
390	PVBOXGUESTSESSION pSession;
391	const RTPROCESS Process = RTProcSelf();
392	const unsigned iHash = SESSION_HASH(sfn);
393	RTSpinlockAcquire(g_Spinlock);
394
395	pSession = g_apSessionHashTab[iHash];
396	if (pSession)
397	{
398	if ( pSession->sfn == sfn
399	&& pSession->Process == Process)
400	{
401	g_apSessionHashTab[iHash] = pSession->pNextHash;
402	pSession->pNextHash = NULL;
403	}
404	else
405	{
406	PVBOXGUESTSESSION pPrev = pSession;
407	pSession = pSession->pNextHash;
408	while (pSession)
409	{
410	if ( pSession->sfn == sfn
411	&& pSession->Process == Process)
412	{
413	pPrev->pNextHash = pSession->pNextHash;
414	pSession->pNextHash = NULL;
415	break;
416	}
417
418	/* next */
419	pPrev = pSession;
420	pSession = pSession->pNextHash;
421	}
422	}
423	}
424	RTSpinlockReleaseNoInts(g_Spinlock);
425	if (!pSession)
426	{
427	Log(("VBoxGuestIoctl: WHUT?!? pSession == NULL! This must be a mistake... pid=%d sfn=%d\n", (int)Process, sfn));
428	return VERR_INVALID_PARAMETER;
429	}
430
431	/*
432	* Close the session.
433	*/
434	VBoxGuestCloseSession(&g_DevExt, pSession);
435	return 0;
436	}
437
438
439	DECLASM(int) VBoxGuestOS2IOCtlFast(uint16_t sfn, uint8_t iFunction, int32_t *prc)
440	{
441	/*
442	* Find the session.
443	*/
444	const RTPROCESS Process = RTProcSelf();
445	const unsigned iHash = SESSION_HASH(sfn);
446	PVBOXGUESTSESSION pSession;
447
448	RTSpinlockAcquire(g_Spinlock);
449	pSession = g_apSessionHashTab[iHash];
450	if (pSession && pSession->Process != Process)
451	{
452	do pSession = pSession->pNextHash;
453	while ( pSession
454	&& ( pSession->sfn != sfn
455	\|\| pSession->Process != Process));
456	}
457	RTSpinlockReleaseNoInts(g_Spinlock);
458	if (RT_UNLIKELY(!pSession))
459	{
460	Log(("VBoxGuestIoctl: WHAT?!? pSession == NULL! This must be a mistake... pid=%d\n", (int)Process));
461	return VERR_INVALID_PARAMETER;
462	}
463
464	/*
465	* Dispatch the fast IOCtl.
466	*/
467	*prc = VBoxGuestCommonIOCtlFast(iFunction, &g_DevExt, pSession);
468	return 0;
469	}
470
471
472	/**
473	* 32-bit IDC service routine.
474	*
475	* @returns VBox status code.
476	* @param u32Session The session handle (PVBOXGUESTSESSION).
477	* @param iFunction The requested function.
478	* @param pvData The input/output data buffer. The caller ensures that this
479	* cannot be swapped out, or that it's acceptable to take a
480	* page in fault in the current context. If the request doesn't
481	* take input or produces output, apssing NULL is okay.
482	* @param cbData The size of the data buffer.
483	* @param pcbDataReturned Where to store the amount of data that's returned.
484	* This can be NULL if pvData is NULL.
485	*
486	* @remark This is called from the 16-bit thunker as well as directly from the 32-bit clients.
487	*/
488	DECLASM(int) VBoxGuestOS2IDCService(uint32_t u32Session, unsigned iFunction, void pvData, size_t cbData, size_t pcbDataReturned)
489	{
490	PVBOXGUESTSESSION pSession = (PVBOXGUESTSESSION)u32Session;
491	AssertPtrReturn(pSession, VERR_INVALID_POINTER);
492	AssertMsgReturn(pSession->sfn == 0xffff, ("%RX16\n", pSession->sfn), VERR_INVALID_HANDLE);
493	AssertMsgReturn(pSession->pDevExt == &g_DevExt, ("%p != %p\n", pSession->pDevExt, &g_DevExt), VERR_INVALID_HANDLE);
494
495	int rc;
496	switch (iFunction)
497	{
498	default:
499	rc = VBoxGuestCommonIOCtl(iFunction, &g_DevExt, pSession, pvData, cbData, pcbDataReturned);
500	break;
501
502	case VBOXGUEST_IOCTL_OS2_IDC_DISCONNECT:
503	pSession->sfn = 0;
504	VBoxGuestCloseSession(&g_DevExt, pSession);
505	rc = VINF_SUCCESS;
506	break;
507	}
508	return rc;
509	}
510
511
512	/**
513	* Worker for VBoxGuestOS2IDC, it creates the kernel session.
514	*
515	* @returns Pointer to the session.
516	*/
517	DECLASM(PVBOXGUESTSESSION) VBoxGuestOS2IDCConnect(void)
518	{
519	PVBOXGUESTSESSION pSession;
520	int rc = VBoxGuestCreateKernelSession(&g_DevExt, &pSession);
521	if (RT_SUCCESS(rc))
522	{
523	pSession->sfn = 0xffff;
524	return pSession;
525	}
526	return NULL;
527	}
528
529
530	DECLASM(int) VBoxGuestOS2IOCtl(uint16_t sfn, uint8_t iCat, uint8_t iFunction, void pvParm, void pvData, uint16_t pcbParm, uint16_t pcbData)
531	{
532	/*
533	* Find the session.
534	*/
535	const RTPROCESS Process = RTProcSelf();
536	const unsigned iHash = SESSION_HASH(sfn);
537	PVBOXGUESTSESSION pSession;
538
539	RTSpinlockAcquire(g_Spinlock);
540	pSession = g_apSessionHashTab[iHash];
541	if (pSession && pSession->Process != Process)
542	{
543	do pSession = pSession->pNextHash;
544	while ( pSession
545	&& ( pSession->sfn != sfn
546	\|\| pSession->Process != Process));
547	}
548	RTSpinlockReleaseNoInts(g_Spinlock);
549	if (!pSession)
550	{
551	Log(("VBoxGuestIoctl: WHAT?!? pSession == NULL! This must be a mistake... pid=%d\n", (int)Process));
552	return VERR_INVALID_PARAMETER;
553	}
554
555	/*
556	* Verify the category and dispatch the IOCtl.
557	*
558	* The IOCtl call uses the parameter buffer as generic data input/output
559	* buffer similar to the one unix ioctl buffer argument. While the data
560	* buffer is used for passing the VBox status code back to the caller
561	* since the status codes that OS/2 accepts thru the DosDevIOCtl API is
562	* severely restricted.
563	*/
564	if (RT_LIKELY(iCat == VBOXGUEST_IOCTL_CATEGORY))
565	{
566	Log(("VBoxGuestOS2IOCtl: pSession=%p iFunction=%#x pvParm=%p pvData=%p pcbParm=%d pcbData=%d\n", pSession, iFunction, pvParm, pvData, pcbParm, pcbData));
567	Assert(pvParm \|\| !*pcbData);
568	Assert(pvData);
569	Assert(pcbData == sizeof(int32_t)); / the return code */
570
571	/*
572	* Lock the buffers.
573	*/
574	int32_t rc;
575	KernVMLock_t ParmLock;
576	if (pvParm)
577	{
578	Assert(*pcbData);
579	rc = KernVMLock(VMDHL_WRITE, pvParm, pcbParm, &ParmLock, (KernPageList_t )-1, NULL);
580	AssertMsgReturn(!rc, ("KernVMLock(VMDHL_WRITE, %p, %#x, &p, NULL, NULL) -> %d\n", pvParm, *pcbParm, &ParmLock, rc), VERR_LOCK_FAILED);
581	}
582
583	#if 0 /* don't bother locking it since it's only 4 bytes (the return code). */
584	KernVMLock_t DataLock;
585	if (pvData)
586	{
587	Assert(*pcbData);
588	rc = KernVMLock(VMDHL_WRITE, pvData, pcbData, &DataLock, (KernPageList_t )-1, NULL);
589	if (rc)
590	{
591	AssertMsgFailed(("KernVMLock(VMDHL_WRITE, %p, %#x, &p, NULL, NULL) -> %d\n", pvData, *pcbData, &DataLock, rc));
592	KernVMUnlock(&ParmLock);
593	return VERR_LOCK_FAILED;
594	}
595	}
596	#endif
597
598	/*
599	* Process the IOCtl.
600	*/
601	size_t cbDataReturned;
602	rc = VBoxGuestCommonIOCtl(iFunction, &g_DevExt, pSession, pvParm, *pcbParm, &cbDataReturned);
603
604	/*
605	* Unlock the buffers.
606	*/
607	if (pvParm)
608	{
609	int rc2 = KernVMUnlock(&ParmLock);
610	AssertMsg(!rc2, ("rc2=%d\n", rc2)); NOREF(rc2);
611	AssertMsg(cbDataReturned < _64K, ("cbDataReturned=%d\n", cbDataReturned));
612	*pcbParm = cbDataReturned;
613	}
614	#if 0
615	if (pvData)
616	{
617	int rc2 = KernVMUnlock(&DataLock);
618	AssertMsg(!rc2, ("rc2=%d\n", rc2));
619	}
620	#else
621	rc = KernCopyOut(pvData, &rc, sizeof(int32_t));
622	AssertMsgReturn(!rc, ("KernCopyOut(%p, %p, sizeof(int32_t)) -> %d\n", pvData, &rc, rc), VERR_LOCK_FAILED);
623	#endif
624
625	Log2(("VBoxGuestOS2IOCtl: returns VINF_SUCCESS / %d\n", rc));
626	return VINF_SUCCESS;
627	}
628	return VERR_NOT_SUPPORTED;
629	}
630
631
632	/**
633	* 32-bit ISR, called by 16-bit assembly thunker in VBoxGuestA-os2.asm.
634	*
635	* @returns true if it's our interrupt, false it isn't.
636	*/
637	DECLASM(bool) VBoxGuestOS2ISR(void)
638	{
639	Log(("VBoxGuestOS2ISR\n"));
640
641	return VBoxGuestCommonISR(&g_DevExt);
642	}
643
644
645	void VBoxGuestNativeISRMousePollEvent(PVBOXGUESTDEVEXT pDevExt)
646	{
647	/* No polling on OS/2 */
648	NOREF(pDevExt);
649	}
650
651
652	#ifdef DEBUG_READ /** @todo figure out this one once and for all... */
653
654	/**
655	* Callback for writing to the log buffer.
656	*
657	* @returns number of bytes written.
658	* @param pvArg Unused.
659	* @param pachChars Pointer to an array of utf-8 characters.
660	* @param cbChars Number of bytes in the character array pointed to by pachChars.
661	*/
662	static DECLCALLBACK(size_t) vboxGuestNativeLogOutput(void pvArg, const char pachChars, size_t cbChars)
663	{
664	size_t cchWritten = 0;
665	while (cbChars-- > 0)
666	{
667	const uint16_t offLogHead = g_offLogHead;
668	const uint16_t offLogHeadNext = (offLogHead + 1) & (g_cchLogMax - 1);
669	if (offLogHeadNext == g_offLogTail)
670	break; /* no */
671	g_szLog[offLogHead] = *pachChars++;
672	g_offLogHead = offLogHeadNext;
673	cchWritten++;
674	}
675	return cchWritten;
676	}
677
678
679	int SUPR0Printf(const char *pszFormat, ...)
680	{
681	va_list va;
682
683	#if 0 //def DEBUG_bird
684	va_start(va, pszFormat);
685	RTLogComPrintfV(pszFormat, va);
686	va_end(va);
687	#endif
688
689	va_start(va, pszFormat);
690	int cch = RTLogFormatV(vboxGuestNativeLogOutput, NULL, pszFormat, va);
691	va_end(va);
692
693	return cch;
694	}
695
696	#endif /* DEBUG_READ */
697

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source: vbox/trunk/src/VBox/Additions/common/VBoxGuest/VBoxGuest-os2.cpp@ 42154

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