VMMSwitcher.cpp@ 26638

Last change on this file since 26638 was 26437, checked in by vboxsync, 15 years ago
VMM: VBOX_WITH_RAW_MODE fixes
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File size: 36.9 KB

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1	/* $Id: VMMSwitcher.cpp 26437 2010-02-11 15:06:15Z vboxsync $ */
2	/** @file
3	* VMM - The Virtual Machine Monitor, World Switcher(s).
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
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	/*******************************************************************************
23	* Header Files *
24	*******************************************************************************/
25	#define LOG_GROUP LOG_GROUP_VMM
26	#include <VBox/vmm.h>
27	#include <VBox/pgm.h>
28	#include <VBox/selm.h>
29	#include <VBox/mm.h>
30	#include <VBox/sup.h>
31	#include "VMMInternal.h"
32	#include "VMMSwitcher/VMMSwitcher.h"
33	#include <VBox/vm.h>
34	#include <VBox/dis.h>
35
36	#include <VBox/err.h>
37	#include <VBox/param.h>
38	#include <iprt/assert.h>
39	#include <iprt/alloc.h>
40	#include <iprt/asm.h>
41	#include <iprt/string.h>
42	#include <iprt/ctype.h>
43
44
45	/*******************************************************************************
46	* Global Variables *
47	*******************************************************************************/
48	/** Array of switcher defininitions.
49	* The type and index shall match!
50	*/
51	static PVMMSWITCHERDEF s_apSwitchers[VMMSWITCHER_MAX] =
52	{
53	NULL, /* invalid entry */
54	#ifdef VBOX_WITH_RAW_MODE
55	# ifndef RT_ARCH_AMD64
56	&vmmR3Switcher32BitTo32Bit_Def,
57	&vmmR3Switcher32BitToPAE_Def,
58	&vmmR3Switcher32BitToAMD64_Def,
59	&vmmR3SwitcherPAETo32Bit_Def,
60	&vmmR3SwitcherPAEToPAE_Def,
61	&vmmR3SwitcherPAEToAMD64_Def,
62	NULL, //&vmmR3SwitcherPAETo32Bit_Def,
63	# ifdef VBOX_WITH_HYBRID_32BIT_KERNEL
64	&vmmR3SwitcherAMD64ToPAE_Def,
65	# else
66	NULL, //&vmmR3SwitcherAMD64ToPAE_Def,
67	# endif
68	NULL //&vmmR3SwitcherAMD64ToAMD64_Def,
69	# else /* RT_ARCH_AMD64 */
70	NULL, //&vmmR3Switcher32BitTo32Bit_Def,
71	NULL, //&vmmR3Switcher32BitToPAE_Def,
72	NULL, //&vmmR3Switcher32BitToAMD64_Def,
73	NULL, //&vmmR3SwitcherPAETo32Bit_Def,
74	NULL, //&vmmR3SwitcherPAEToPAE_Def,
75	NULL, //&vmmR3SwitcherPAEToAMD64_Def,
76	&vmmR3SwitcherAMD64To32Bit_Def,
77	&vmmR3SwitcherAMD64ToPAE_Def,
78	NULL //&vmmR3SwitcherAMD64ToAMD64_Def,
79	# endif /* RT_ARCH_AMD64 */
80	#else /* !VBOX_WITH_RAW_MODE */
81	NULL,
82	NULL,
83	NULL,
84	NULL,
85	NULL,
86	NULL,
87	NULL,
88	NULL,
89	NULL
90	#endif /* !VBOX_WITH_RAW_MODE */
91	};
92
93
94	/**
95	* VMMR3Init worker that initiates the switcher code (aka core code).
96	*
97	* This is core per VM code which might need fixups and/or for ease of use are
98	* put on linear contiguous backing.
99	*
100	* @returns VBox status code.
101	* @param pVM Pointer to the shared VM structure.
102	*/
103	int vmmR3SwitcherInit(PVM pVM)
104	{
105	#ifndef VBOX_WITH_RAW_MODE
106	return VINF_SUCCESS;
107	#else
108	/*
109	* Calc the size.
110	*/
111	unsigned cbCoreCode = 0;
112	for (unsigned iSwitcher = 0; iSwitcher < RT_ELEMENTS(s_apSwitchers); iSwitcher++)
113	{
114	pVM->vmm.s.aoffSwitchers[iSwitcher] = cbCoreCode;
115	PVMMSWITCHERDEF pSwitcher = s_apSwitchers[iSwitcher];
116	if (pSwitcher)
117	{
118	AssertRelease((unsigned)pSwitcher->enmType == iSwitcher);
119	cbCoreCode += RT_ALIGN_32(pSwitcher->cbCode + 1, 32);
120	}
121	}
122
123	/*
124	* Allocate continguous pages for switchers and deal with
125	* conflicts in the intermediate mapping of the code.
126	*/
127	pVM->vmm.s.cbCoreCode = RT_ALIGN_32(cbCoreCode, PAGE_SIZE);
128	pVM->vmm.s.pvCoreCodeR3 = SUPR3ContAlloc(pVM->vmm.s.cbCoreCode >> PAGE_SHIFT, &pVM->vmm.s.pvCoreCodeR0, &pVM->vmm.s.HCPhysCoreCode);
129	int rc = VERR_NO_MEMORY;
130	if (pVM->vmm.s.pvCoreCodeR3)
131	{
132	rc = PGMR3MapIntermediate(pVM, pVM->vmm.s.pvCoreCodeR0, pVM->vmm.s.HCPhysCoreCode, cbCoreCode);
133	if (rc == VERR_PGM_INTERMEDIATE_PAGING_CONFLICT)
134	{
135	/* try more allocations - Solaris, Linux. */
136	const unsigned cTries = 8234;
137	struct VMMInitBadTry
138	{
139	RTR0PTR pvR0;
140	void *pvR3;
141	RTHCPHYS HCPhys;
142	RTUINT cb;
143	} paBadTries = (struct VMMInitBadTry )RTMemTmpAlloc(sizeof(paBadTries) cTries);
144	AssertReturn(paBadTries, VERR_NO_TMP_MEMORY);
145	unsigned i = 0;
146	do
147	{
148	paBadTries[i].pvR3 = pVM->vmm.s.pvCoreCodeR3;
149	paBadTries[i].pvR0 = pVM->vmm.s.pvCoreCodeR0;
150	paBadTries[i].HCPhys = pVM->vmm.s.HCPhysCoreCode;
151	i++;
152	pVM->vmm.s.pvCoreCodeR0 = NIL_RTR0PTR;
153	pVM->vmm.s.HCPhysCoreCode = NIL_RTHCPHYS;
154	pVM->vmm.s.pvCoreCodeR3 = SUPR3ContAlloc(pVM->vmm.s.cbCoreCode >> PAGE_SHIFT, &pVM->vmm.s.pvCoreCodeR0, &pVM->vmm.s.HCPhysCoreCode);
155	if (!pVM->vmm.s.pvCoreCodeR3)
156	break;
157	rc = PGMR3MapIntermediate(pVM, pVM->vmm.s.pvCoreCodeR0, pVM->vmm.s.HCPhysCoreCode, cbCoreCode);
158	} while ( rc == VERR_PGM_INTERMEDIATE_PAGING_CONFLICT
159	&& i < cTries - 1);
160
161	/* cleanup */
162	if (RT_FAILURE(rc))
163	{
164	paBadTries[i].pvR3 = pVM->vmm.s.pvCoreCodeR3;
165	paBadTries[i].pvR0 = pVM->vmm.s.pvCoreCodeR0;
166	paBadTries[i].HCPhys = pVM->vmm.s.HCPhysCoreCode;
167	paBadTries[i].cb = pVM->vmm.s.cbCoreCode;
168	i++;
169	LogRel(("Failed to allocated and map core code: rc=%Rrc\n", rc));
170	}
171	while (i-- > 0)
172	{
173	LogRel(("Core code alloc attempt #%d: pvR3=%p pvR0=%p HCPhys=%RHp\n",
174	i, paBadTries[i].pvR3, paBadTries[i].pvR0, paBadTries[i].HCPhys));
175	SUPR3ContFree(paBadTries[i].pvR3, paBadTries[i].cb >> PAGE_SHIFT);
176	}
177	RTMemTmpFree(paBadTries);
178	}
179	}
180	if (RT_SUCCESS(rc))
181	{
182	/*
183	* copy the code.
184	*/
185	for (unsigned iSwitcher = 0; iSwitcher < RT_ELEMENTS(s_apSwitchers); iSwitcher++)
186	{
187	PVMMSWITCHERDEF pSwitcher = s_apSwitchers[iSwitcher];
188	if (pSwitcher)
189	memcpy((uint8_t *)pVM->vmm.s.pvCoreCodeR3 + pVM->vmm.s.aoffSwitchers[iSwitcher],
190	pSwitcher->pvCode, pSwitcher->cbCode);
191	}
192
193	/*
194	* Map the code into the GC address space.
195	*/
196	RTGCPTR GCPtr;
197	rc = MMR3HyperMapHCPhys(pVM, pVM->vmm.s.pvCoreCodeR3, pVM->vmm.s.pvCoreCodeR0, pVM->vmm.s.HCPhysCoreCode,
198	cbCoreCode, "Core Code", &GCPtr);
199	if (RT_SUCCESS(rc))
200	{
201	pVM->vmm.s.pvCoreCodeRC = GCPtr;
202	MMR3HyperReserve(pVM, PAGE_SIZE, "fence", NULL);
203	LogRel(("CoreCode: R3=%RHv R0=%RHv RC=%RRv Phys=%RHp cb=%#x\n",
204	pVM->vmm.s.pvCoreCodeR3, pVM->vmm.s.pvCoreCodeR0, pVM->vmm.s.pvCoreCodeRC, pVM->vmm.s.HCPhysCoreCode, pVM->vmm.s.cbCoreCode));
205
206	/*
207	* Finally, PGM probably has selected a switcher already but we need
208	* to get the routine addresses, so we'll reselect it.
209	* This may legally fail so, we're ignoring the rc.
210	*/
211	VMMR3SelectSwitcher(pVM, pVM->vmm.s.enmSwitcher);
212	return rc;
213	}
214
215	/* shit */
216	AssertMsgFailed(("PGMR3Map(,%RRv, %RHp, %#x, 0) failed with rc=%Rrc\n", pVM->vmm.s.pvCoreCodeRC, pVM->vmm.s.HCPhysCoreCode, cbCoreCode, rc));
217	SUPR3ContFree(pVM->vmm.s.pvCoreCodeR3, pVM->vmm.s.cbCoreCode >> PAGE_SHIFT);
218	}
219	else
220	VMSetError(pVM, rc, RT_SRC_POS,
221	N_("Failed to allocate %d bytes of contiguous memory for the world switcher code"),
222	cbCoreCode);
223
224	pVM->vmm.s.pvCoreCodeR3 = NULL;
225	pVM->vmm.s.pvCoreCodeR0 = NIL_RTR0PTR;
226	pVM->vmm.s.pvCoreCodeRC = 0;
227	return rc;
228	#endif
229	}
230
231	/**
232	* Relocate the switchers, called by VMMR#Relocate.
233	*
234	* @param pVM Pointer to the shared VM structure.
235	* @param offDelta The relocation delta.
236	*/
237	void vmmR3SwitcherRelocate(PVM pVM, RTGCINTPTR offDelta)
238	{
239	#ifdef VBOX_WITH_RAW_MODE
240	/*
241	* Relocate all the switchers.
242	*/
243	for (unsigned iSwitcher = 0; iSwitcher < RT_ELEMENTS(s_apSwitchers); iSwitcher++)
244	{
245	PVMMSWITCHERDEF pSwitcher = s_apSwitchers[iSwitcher];
246	if (pSwitcher && pSwitcher->pfnRelocate)
247	{
248	unsigned off = pVM->vmm.s.aoffSwitchers[iSwitcher];
249	pSwitcher->pfnRelocate(pVM,
250	pSwitcher,
251	pVM->vmm.s.pvCoreCodeR0 + off,
252	(uint8_t *)pVM->vmm.s.pvCoreCodeR3 + off,
253	pVM->vmm.s.pvCoreCodeRC + off,
254	pVM->vmm.s.HCPhysCoreCode + off);
255	}
256	}
257
258	/*
259	* Recalc the RC address for the current switcher.
260	*/
261	PVMMSWITCHERDEF pSwitcher = s_apSwitchers[pVM->vmm.s.enmSwitcher];
262	RTRCPTR RCPtr = pVM->vmm.s.pvCoreCodeRC + pVM->vmm.s.aoffSwitchers[pVM->vmm.s.enmSwitcher];
263	pVM->vmm.s.pfnGuestToHostRC = RCPtr + pSwitcher->offGCGuestToHost;
264	pVM->vmm.s.pfnCallTrampolineRC = RCPtr + pSwitcher->offGCCallTrampoline;
265	pVM->pfnVMMGCGuestToHostAsm = RCPtr + pSwitcher->offGCGuestToHostAsm;
266	pVM->pfnVMMGCGuestToHostAsmHyperCtx = RCPtr + pSwitcher->offGCGuestToHostAsmHyperCtx;
267	pVM->pfnVMMGCGuestToHostAsmGuestCtx = RCPtr + pSwitcher->offGCGuestToHostAsmGuestCtx;
268
269	// AssertFailed();
270	#endif
271	}
272
273
274	/**
275	* Generic switcher code relocator.
276	*
277	* @param pVM The VM handle.
278	* @param pSwitcher The switcher definition.
279	* @param pu8CodeR3 Pointer to the core code block for the switcher, ring-3 mapping.
280	* @param R0PtrCode Pointer to the core code block for the switcher, ring-0 mapping.
281	* @param GCPtrCode The guest context address corresponding to pu8Code.
282	* @param u32IDCode The identity mapped (ID) address corresponding to pu8Code.
283	* @param SelCS The hypervisor CS selector.
284	* @param SelDS The hypervisor DS selector.
285	* @param SelTSS The hypervisor TSS selector.
286	* @param GCPtrGDT The GC address of the hypervisor GDT.
287	* @param SelCS64 The 64-bit mode hypervisor CS selector.
288	*/
289	static void vmmR3SwitcherGenericRelocate(PVM pVM, PVMMSWITCHERDEF pSwitcher, RTR0PTR R0PtrCode, uint8_t *pu8CodeR3, RTGCPTR GCPtrCode, uint32_t u32IDCode,
290	RTSEL SelCS, RTSEL SelDS, RTSEL SelTSS, RTGCPTR GCPtrGDT, RTSEL SelCS64)
291	{
292	union
293	{
294	const uint8_t *pu8;
295	const uint16_t *pu16;
296	const uint32_t *pu32;
297	const uint64_t *pu64;
298	const void *pv;
299	uintptr_t u;
300	} u;
301	u.pv = pSwitcher->pvFixups;
302
303	/*
304	* Process fixups.
305	*/
306	uint8_t u8;
307	while ((u8 = *u.pu8++) != FIX_THE_END)
308	{
309	/*
310	* Get the source (where to write the fixup).
311	*/
312	uint32_t offSrc = *u.pu32++;
313	Assert(offSrc < pSwitcher->cbCode);
314	union
315	{
316	uint8_t *pu8;
317	uint16_t *pu16;
318	uint32_t *pu32;
319	uint64_t *pu64;
320	uintptr_t u;
321	} uSrc;
322	uSrc.pu8 = pu8CodeR3 + offSrc;
323
324	/* The fixup target and method depends on the type. */
325	switch (u8)
326	{
327	/*
328	* 32-bit relative, source in HC and target in GC.
329	*/
330	case FIX_HC_2_GC_NEAR_REL:
331	{
332	Assert(offSrc - pSwitcher->offHCCode0 < pSwitcher->cbHCCode0 \|\| offSrc - pSwitcher->offHCCode1 < pSwitcher->cbHCCode1);
333	uint32_t offTrg = *u.pu32++;
334	Assert(offTrg - pSwitcher->offGCCode < pSwitcher->cbGCCode);
335	*uSrc.pu32 = (uint32_t)((GCPtrCode + offTrg) - (uSrc.u + 4));
336	break;
337	}
338
339	/*
340	* 32-bit relative, source in HC and target in ID.
341	*/
342	case FIX_HC_2_ID_NEAR_REL:
343	{
344	Assert(offSrc - pSwitcher->offHCCode0 < pSwitcher->cbHCCode0 \|\| offSrc - pSwitcher->offHCCode1 < pSwitcher->cbHCCode1);
345	uint32_t offTrg = *u.pu32++;
346	Assert(offTrg - pSwitcher->offIDCode0 < pSwitcher->cbIDCode0 \|\| offTrg - pSwitcher->offIDCode1 < pSwitcher->cbIDCode1);
347	*uSrc.pu32 = (uint32_t)((u32IDCode + offTrg) - (R0PtrCode + offSrc + 4));
348	break;
349	}
350
351	/*
352	* 32-bit relative, source in GC and target in HC.
353	*/
354	case FIX_GC_2_HC_NEAR_REL:
355	{
356	Assert(offSrc - pSwitcher->offGCCode < pSwitcher->cbGCCode);
357	uint32_t offTrg = *u.pu32++;
358	Assert(offTrg - pSwitcher->offHCCode0 < pSwitcher->cbHCCode0 \|\| offTrg - pSwitcher->offHCCode1 < pSwitcher->cbHCCode1);
359	*uSrc.pu32 = (uint32_t)((R0PtrCode + offTrg) - (GCPtrCode + offSrc + 4));
360	break;
361	}
362
363	/*
364	* 32-bit relative, source in GC and target in ID.
365	*/
366	case FIX_GC_2_ID_NEAR_REL:
367	{
368	AssertMsg(offSrc - pSwitcher->offGCCode < pSwitcher->cbGCCode, ("%x - %x < %x\n", offSrc, pSwitcher->offGCCode, pSwitcher->cbGCCode));
369	uint32_t offTrg = *u.pu32++;
370	Assert(offTrg - pSwitcher->offIDCode0 < pSwitcher->cbIDCode0 \|\| offTrg - pSwitcher->offIDCode1 < pSwitcher->cbIDCode1);
371	*uSrc.pu32 = (uint32_t)((u32IDCode + offTrg) - (GCPtrCode + offSrc + 4));
372	break;
373	}
374
375	/*
376	* 32-bit relative, source in ID and target in HC.
377	*/
378	case FIX_ID_2_HC_NEAR_REL:
379	{
380	Assert(offSrc - pSwitcher->offIDCode0 < pSwitcher->cbIDCode0 \|\| offSrc - pSwitcher->offIDCode1 < pSwitcher->cbIDCode1);
381	uint32_t offTrg = *u.pu32++;
382	Assert(offTrg - pSwitcher->offHCCode0 < pSwitcher->cbHCCode0 \|\| offTrg - pSwitcher->offHCCode1 < pSwitcher->cbHCCode1);
383	*uSrc.pu32 = (uint32_t)((R0PtrCode + offTrg) - (u32IDCode + offSrc + 4));
384	break;
385	}
386
387	/*
388	* 32-bit relative, source in ID and target in HC.
389	*/
390	case FIX_ID_2_GC_NEAR_REL:
391	{
392	Assert(offSrc - pSwitcher->offIDCode0 < pSwitcher->cbIDCode0 \|\| offSrc - pSwitcher->offIDCode1 < pSwitcher->cbIDCode1);
393	uint32_t offTrg = *u.pu32++;
394	Assert(offTrg - pSwitcher->offGCCode < pSwitcher->cbGCCode);
395	*uSrc.pu32 = (uint32_t)((GCPtrCode + offTrg) - (u32IDCode + offSrc + 4));
396	break;
397	}
398
399	/*
400	* 16:32 far jump, target in GC.
401	*/
402	case FIX_GC_FAR32:
403	{
404	uint32_t offTrg = *u.pu32++;
405	Assert(offTrg - pSwitcher->offGCCode < pSwitcher->cbGCCode);
406	*uSrc.pu32++ = (uint32_t)(GCPtrCode + offTrg);
407	*uSrc.pu16++ = SelCS;
408	break;
409	}
410
411	/*
412	* Make 32-bit GC pointer given CPUM offset.
413	*/
414	case FIX_GC_CPUM_OFF:
415	{
416	uint32_t offCPUM = *u.pu32++;
417	Assert(offCPUM < sizeof(pVM->cpum));
418	*uSrc.pu32 = (uint32_t)(VM_RC_ADDR(pVM, &pVM->cpum) + offCPUM);
419	break;
420	}
421
422	/*
423	* Make 32-bit GC pointer given CPUMCPU offset.
424	*/
425	case FIX_GC_CPUMCPU_OFF:
426	{
427	uint32_t offCPUM = *u.pu32++;
428	Assert(offCPUM < sizeof(pVM->aCpus[0].cpum));
429	*uSrc.pu32 = (uint32_t)(VM_RC_ADDR(pVM, &pVM->aCpus[0].cpum) + offCPUM);
430	break;
431	}
432
433	/*
434	* Make 32-bit GC pointer given VM offset.
435	*/
436	case FIX_GC_VM_OFF:
437	{
438	uint32_t offVM = *u.pu32++;
439	Assert(offVM < sizeof(VM));
440	*uSrc.pu32 = (uint32_t)(VM_RC_ADDR(pVM, pVM) + offVM);
441	break;
442	}
443
444	/*
445	* Make 32-bit HC pointer given CPUM offset.
446	*/
447	case FIX_HC_CPUM_OFF:
448	{
449	uint32_t offCPUM = *u.pu32++;
450	Assert(offCPUM < sizeof(pVM->cpum));
451	*uSrc.pu32 = (uint32_t)pVM->pVMR0 + RT_OFFSETOF(VM, cpum) + offCPUM;
452	break;
453	}
454
455	/*
456	* Make 32-bit R0 pointer given VM offset.
457	*/
458	case FIX_HC_VM_OFF:
459	{
460	uint32_t offVM = *u.pu32++;
461	Assert(offVM < sizeof(VM));
462	*uSrc.pu32 = (uint32_t)pVM->pVMR0 + offVM;
463	break;
464	}
465
466	/*
467	* Store the 32-Bit CR3 (32-bit) for the intermediate memory context.
468	*/
469	case FIX_INTER_32BIT_CR3:
470	{
471
472	*uSrc.pu32 = PGMGetInter32BitCR3(pVM);
473	break;
474	}
475
476	/*
477	* Store the PAE CR3 (32-bit) for the intermediate memory context.
478	*/
479	case FIX_INTER_PAE_CR3:
480	{
481
482	*uSrc.pu32 = PGMGetInterPaeCR3(pVM);
483	break;
484	}
485
486	/*
487	* Store the AMD64 CR3 (32-bit) for the intermediate memory context.
488	*/
489	case FIX_INTER_AMD64_CR3:
490	{
491
492	*uSrc.pu32 = PGMGetInterAmd64CR3(pVM);
493	break;
494	}
495
496	/*
497	* Store Hypervisor CS (16-bit).
498	*/
499	case FIX_HYPER_CS:
500	{
501	*uSrc.pu16 = SelCS;
502	break;
503	}
504
505	/*
506	* Store Hypervisor DS (16-bit).
507	*/
508	case FIX_HYPER_DS:
509	{
510	*uSrc.pu16 = SelDS;
511	break;
512	}
513
514	/*
515	* Store Hypervisor TSS (16-bit).
516	*/
517	case FIX_HYPER_TSS:
518	{
519	*uSrc.pu16 = SelTSS;
520	break;
521	}
522
523	/*
524	* Store the 32-bit GC address of the 2nd dword of the TSS descriptor (in the GDT).
525	*/
526	case FIX_GC_TSS_GDTE_DW2:
527	{
528	RTGCPTR GCPtr = GCPtrGDT + (SelTSS & ~7) + 4;
529	*uSrc.pu32 = (uint32_t)GCPtr;
530	break;
531	}
532
533
534	///@todo case FIX_CR4_MASK:
535	///@todo case FIX_CR4_OSFSXR:
536
537	/*
538	* Insert relative jump to specified target it FXSAVE/FXRSTOR isn't supported by the cpu.
539	*/
540	case FIX_NO_FXSAVE_JMP:
541	{
542	uint32_t offTrg = *u.pu32++;
543	Assert(offTrg < pSwitcher->cbCode);
544	if (!CPUMSupportsFXSR(pVM))
545	{
546	uSrc.pu8++ = 0xe9; / jmp rel32 */
547	*uSrc.pu32++ = offTrg - (offSrc + 5);
548	}
549	else
550	{
551	uSrc.pu8++ = ((uint8_t *)pSwitcher->pvCode + offSrc);
552	uSrc.pu32++ = (uint32_t )((uint8_t )pSwitcher->pvCode + offSrc + 1);
553	}
554	break;
555	}
556
557	/*
558	* Insert relative jump to specified target it SYSENTER isn't used by the host.
559	*/
560	case FIX_NO_SYSENTER_JMP:
561	{
562	uint32_t offTrg = *u.pu32++;
563	Assert(offTrg < pSwitcher->cbCode);
564	if (!CPUMIsHostUsingSysEnter(pVM))
565	{
566	uSrc.pu8++ = 0xe9; / jmp rel32 */
567	*uSrc.pu32++ = offTrg - (offSrc + 5);
568	}
569	else
570	{
571	uSrc.pu8++ = ((uint8_t *)pSwitcher->pvCode + offSrc);
572	uSrc.pu32++ = (uint32_t )((uint8_t )pSwitcher->pvCode + offSrc + 1);
573	}
574	break;
575	}
576
577	/*
578	* Insert relative jump to specified target it SYSCALL isn't used by the host.
579	*/
580	case FIX_NO_SYSCALL_JMP:
581	{
582	uint32_t offTrg = *u.pu32++;
583	Assert(offTrg < pSwitcher->cbCode);
584	if (!CPUMIsHostUsingSysCall(pVM))
585	{
586	uSrc.pu8++ = 0xe9; / jmp rel32 */
587	*uSrc.pu32++ = offTrg - (offSrc + 5);
588	}
589	else
590	{
591	uSrc.pu8++ = ((uint8_t *)pSwitcher->pvCode + offSrc);
592	uSrc.pu32++ = (uint32_t )((uint8_t )pSwitcher->pvCode + offSrc + 1);
593	}
594	break;
595	}
596
597	/*
598	* 32-bit HC pointer fixup to (HC) target within the code (32-bit offset).
599	*/
600	case FIX_HC_32BIT:
601	{
602	uint32_t offTrg = *u.pu32++;
603	Assert(offSrc < pSwitcher->cbCode);
604	Assert(offTrg - pSwitcher->offHCCode0 < pSwitcher->cbHCCode0 \|\| offTrg - pSwitcher->offHCCode1 < pSwitcher->cbHCCode1);
605	*uSrc.pu32 = R0PtrCode + offTrg;
606	break;
607	}
608
609	#if defined(RT_ARCH_AMD64) \|\| defined(VBOX_WITH_HYBRID_32BIT_KERNEL)
610	/*
611	* 64-bit HC Code Selector (no argument).
612	*/
613	case FIX_HC_64BIT_CS:
614	{
615	Assert(offSrc < pSwitcher->cbCode);
616	# if defined(RT_OS_DARWIN) && defined(VBOX_WITH_HYBRID_32BIT_KERNEL)
617	uSrc.pu16 = 0x80; / KERNEL64_CS from i386/seg.h */
618	# else
619	AssertFatalMsgFailed(("FIX_HC_64BIT_CS not implemented for this host\n"));
620	# endif
621	break;
622	}
623
624	/*
625	* 64-bit HC pointer to the CPUM instance data (no argument).
626	*/
627	case FIX_HC_64BIT_CPUM:
628	{
629	Assert(offSrc < pSwitcher->cbCode);
630	*uSrc.pu64 = pVM->pVMR0 + RT_OFFSETOF(VM, cpum);
631	break;
632	}
633	#endif
634	/*
635	* 64-bit HC pointer fixup to (HC) target within the code (32-bit offset).
636	*/
637	case FIX_HC_64BIT:
638	{
639	uint32_t offTrg = *u.pu32++;
640	Assert(offSrc < pSwitcher->cbCode);
641	Assert(offTrg - pSwitcher->offHCCode0 < pSwitcher->cbHCCode0 \|\| offTrg - pSwitcher->offHCCode1 < pSwitcher->cbHCCode1);
642	*uSrc.pu64 = R0PtrCode + offTrg;
643	break;
644	}
645
646	#ifdef RT_ARCH_X86
647	case FIX_GC_64_BIT_CPUM_OFF:
648	{
649	uint32_t offCPUM = *u.pu32++;
650	Assert(offCPUM < sizeof(pVM->cpum));
651	*uSrc.pu64 = (uint32_t)(VM_RC_ADDR(pVM, &pVM->cpum) + offCPUM);
652	break;
653	}
654	#endif
655
656	/*
657	* 32-bit ID pointer to (ID) target within the code (32-bit offset).
658	*/
659	case FIX_ID_32BIT:
660	{
661	uint32_t offTrg = *u.pu32++;
662	Assert(offSrc < pSwitcher->cbCode);
663	Assert(offTrg - pSwitcher->offIDCode0 < pSwitcher->cbIDCode0 \|\| offTrg - pSwitcher->offIDCode1 < pSwitcher->cbIDCode1);
664	*uSrc.pu32 = u32IDCode + offTrg;
665	break;
666	}
667
668	/*
669	* 64-bit ID pointer to (ID) target within the code (32-bit offset).
670	*/
671	case FIX_ID_64BIT:
672	case FIX_HC_64BIT_NOCHECK:
673	{
674	uint32_t offTrg = *u.pu32++;
675	Assert(offSrc < pSwitcher->cbCode);
676	Assert(u8 == FIX_HC_64BIT_NOCHECK \|\| offTrg - pSwitcher->offIDCode0 < pSwitcher->cbIDCode0 \|\| offTrg - pSwitcher->offIDCode1 < pSwitcher->cbIDCode1);
677	*uSrc.pu64 = u32IDCode + offTrg;
678	break;
679	}
680
681	/*
682	* Far 16:32 ID pointer to 64-bit mode (ID) target within the code (32-bit offset).
683	*/
684	case FIX_ID_FAR32_TO_64BIT_MODE:
685	{
686	uint32_t offTrg = *u.pu32++;
687	Assert(offSrc < pSwitcher->cbCode);
688	Assert(offTrg - pSwitcher->offIDCode0 < pSwitcher->cbIDCode0 \|\| offTrg - pSwitcher->offIDCode1 < pSwitcher->cbIDCode1);
689	*uSrc.pu32++ = u32IDCode + offTrg;
690	*uSrc.pu16 = SelCS64;
691	AssertRelease(SelCS64);
692	break;
693	}
694
695	#ifdef VBOX_WITH_NMI
696	/*
697	* 32-bit address to the APIC base.
698	*/
699	case FIX_GC_APIC_BASE_32BIT:
700	{
701	*uSrc.pu32 = pVM->vmm.s.GCPtrApicBase;
702	break;
703	}
704	#endif
705
706	default:
707	AssertReleaseMsgFailed(("Unknown fixup %d in switcher %s\n", u8, pSwitcher->pszDesc));
708	break;
709	}
710	}
711
712	#ifdef LOG_ENABLED
713	/*
714	* If Log2 is enabled disassemble the switcher code.
715	*
716	* The switcher code have 1-2 HC parts, 1 GC part and 0-2 ID parts.
717	*/
718	if (LogIs2Enabled())
719	{
720	RTLogPrintf("* Disassembly of switcher %d '%s' %#x bytes *\n"
721	" R0PtrCode = %p\n"
722	" pu8CodeR3 = %p\n"
723	" GCPtrCode = %RGv\n"
724	" u32IDCode = %08x\n"
725	" pVMRC = %RRv\n"
726	" pCPUMRC = %RRv\n"
727	" pVMR3 = %p\n"
728	" pCPUMR3 = %p\n"
729	" GCPtrGDT = %RGv\n"
730	" InterCR3s = %08RHp, %08RHp, %08RHp (32-Bit, PAE, AMD64)\n"
731	" HyperCR3s = %08RHp (32-Bit, PAE & AMD64)\n"
732	" SelCS = %04x\n"
733	" SelDS = %04x\n"
734	" SelCS64 = %04x\n"
735	" SelTSS = %04x\n",
736	pSwitcher->enmType, pSwitcher->pszDesc, pSwitcher->cbCode,
737	R0PtrCode,
738	pu8CodeR3,
739	GCPtrCode,
740	u32IDCode,
741	VM_RC_ADDR(pVM, pVM),
742	VM_RC_ADDR(pVM, &pVM->cpum),
743	pVM,
744	&pVM->cpum,
745	GCPtrGDT,
746	PGMGetInter32BitCR3(pVM), PGMGetInterPaeCR3(pVM), PGMGetInterAmd64CR3(pVM),
747	PGMGetHyperCR3(VMMGetCpu(pVM)),
748	SelCS, SelDS, SelCS64, SelTSS);
749
750	uint32_t offCode = 0;
751	while (offCode < pSwitcher->cbCode)
752	{
753	/*
754	* Figure out where this is.
755	*/
756	const char *pszDesc = NULL;
757	RTUINTPTR uBase;
758	uint32_t cbCode;
759	if (offCode - pSwitcher->offHCCode0 < pSwitcher->cbHCCode0)
760	{
761	pszDesc = "HCCode0";
762	uBase = R0PtrCode;
763	offCode = pSwitcher->offHCCode0;
764	cbCode = pSwitcher->cbHCCode0;
765	}
766	else if (offCode - pSwitcher->offHCCode1 < pSwitcher->cbHCCode1)
767	{
768	pszDesc = "HCCode1";
769	uBase = R0PtrCode;
770	offCode = pSwitcher->offHCCode1;
771	cbCode = pSwitcher->cbHCCode1;
772	}
773	else if (offCode - pSwitcher->offGCCode < pSwitcher->cbGCCode)
774	{
775	pszDesc = "GCCode";
776	uBase = GCPtrCode;
777	offCode = pSwitcher->offGCCode;
778	cbCode = pSwitcher->cbGCCode;
779	}
780	else if (offCode - pSwitcher->offIDCode0 < pSwitcher->cbIDCode0)
781	{
782	pszDesc = "IDCode0";
783	uBase = u32IDCode;
784	offCode = pSwitcher->offIDCode0;
785	cbCode = pSwitcher->cbIDCode0;
786	}
787	else if (offCode - pSwitcher->offIDCode1 < pSwitcher->cbIDCode1)
788	{
789	pszDesc = "IDCode1";
790	uBase = u32IDCode;
791	offCode = pSwitcher->offIDCode1;
792	cbCode = pSwitcher->cbIDCode1;
793	}
794	else
795	{
796	RTLogPrintf(" %04x: %02x '%c' (nowhere)\n",
797	offCode, pu8CodeR3[offCode], RT_C_IS_PRINT(pu8CodeR3[offCode]) ? pu8CodeR3[offCode] : ' ');
798	offCode++;
799	continue;
800	}
801
802	/*
803	* Disassemble it.
804	*/
805	RTLogPrintf(" %s: offCode=%#x cbCode=%#x\n", pszDesc, offCode, cbCode);
806	DISCPUSTATE Cpu;
807
808	memset(&Cpu, 0, sizeof(Cpu));
809	Cpu.mode = CPUMODE_32BIT;
810	while (cbCode > 0)
811	{
812	/* try label it */
813	if (pSwitcher->offR0HostToGuest == offCode)
814	RTLogPrintf(" *R0HostToGuest:\n");
815	if (pSwitcher->offGCGuestToHost == offCode)
816	RTLogPrintf(" *GCGuestToHost:\n");
817	if (pSwitcher->offGCCallTrampoline == offCode)
818	RTLogPrintf(" *GCCallTrampoline:\n");
819	if (pSwitcher->offGCGuestToHostAsm == offCode)
820	RTLogPrintf(" *GCGuestToHostAsm:\n");
821	if (pSwitcher->offGCGuestToHostAsmHyperCtx == offCode)
822	RTLogPrintf(" *GCGuestToHostAsmHyperCtx:\n");
823	if (pSwitcher->offGCGuestToHostAsmGuestCtx == offCode)
824	RTLogPrintf(" *GCGuestToHostAsmGuestCtx:\n");
825
826	/* disas */
827	uint32_t cbInstr = 0;
828	char szDisas[256];
829	if (RT_SUCCESS(DISInstr(&Cpu, (uintptr_t)pu8CodeR3 + offCode, uBase - (uintptr_t)pu8CodeR3, &cbInstr, szDisas)))
830	RTLogPrintf(" %04x: %s", offCode, szDisas); //for whatever reason szDisas includes '\n'.
831	else
832	{
833	RTLogPrintf(" %04x: %02x '%c'\n",
834	offCode, pu8CodeR3[offCode], RT_C_IS_PRINT(pu8CodeR3[offCode]) ? pu8CodeR3[offCode] : ' ');
835	cbInstr = 1;
836	}
837	offCode += cbInstr;
838	cbCode -= RT_MIN(cbInstr, cbCode);
839	}
840	}
841	}
842	#endif
843	}
844
845
846	/**
847	* Relocator for the 32-Bit to 32-Bit world switcher.
848	*/
849	DECLCALLBACK(void) vmmR3Switcher32BitTo32Bit_Relocate(PVM pVM, PVMMSWITCHERDEF pSwitcher, RTR0PTR R0PtrCode, uint8_t *pu8CodeR3, RTGCPTR GCPtrCode, uint32_t u32IDCode)
850	{
851	vmmR3SwitcherGenericRelocate(pVM, pSwitcher, R0PtrCode, pu8CodeR3, GCPtrCode, u32IDCode,
852	SELMGetHyperCS(pVM), SELMGetHyperDS(pVM), SELMGetHyperTSS(pVM), SELMGetHyperGDT(pVM), 0);
853	}
854
855
856	/**
857	* Relocator for the 32-Bit to PAE world switcher.
858	*/
859	DECLCALLBACK(void) vmmR3Switcher32BitToPAE_Relocate(PVM pVM, PVMMSWITCHERDEF pSwitcher, RTR0PTR R0PtrCode, uint8_t *pu8CodeR3, RTGCPTR GCPtrCode, uint32_t u32IDCode)
860	{
861	vmmR3SwitcherGenericRelocate(pVM, pSwitcher, R0PtrCode, pu8CodeR3, GCPtrCode, u32IDCode,
862	SELMGetHyperCS(pVM), SELMGetHyperDS(pVM), SELMGetHyperTSS(pVM), SELMGetHyperGDT(pVM), 0);
863	}
864
865
866	/**
867	* Relocator for the 32-Bit to AMD64 world switcher.
868	*/
869	DECLCALLBACK(void) vmmR3Switcher32BitToAMD64_Relocate(PVM pVM, PVMMSWITCHERDEF pSwitcher, RTR0PTR R0PtrCode, uint8_t *pu8CodeR3, RTGCPTR GCPtrCode, uint32_t u32IDCode)
870	{
871	vmmR3SwitcherGenericRelocate(pVM, pSwitcher, R0PtrCode, pu8CodeR3, GCPtrCode, u32IDCode,
872	SELMGetHyperCS(pVM), SELMGetHyperDS(pVM), SELMGetHyperTSS(pVM), SELMGetHyperGDT(pVM), SELMGetHyperCS64(pVM));
873	}
874
875
876	/**
877	* Relocator for the PAE to 32-Bit world switcher.
878	*/
879	DECLCALLBACK(void) vmmR3SwitcherPAETo32Bit_Relocate(PVM pVM, PVMMSWITCHERDEF pSwitcher, RTR0PTR R0PtrCode, uint8_t *pu8CodeR3, RTGCPTR GCPtrCode, uint32_t u32IDCode)
880	{
881	vmmR3SwitcherGenericRelocate(pVM, pSwitcher, R0PtrCode, pu8CodeR3, GCPtrCode, u32IDCode,
882	SELMGetHyperCS(pVM), SELMGetHyperDS(pVM), SELMGetHyperTSS(pVM), SELMGetHyperGDT(pVM), 0);
883	}
884
885
886	/**
887	* Relocator for the PAE to PAE world switcher.
888	*/
889	DECLCALLBACK(void) vmmR3SwitcherPAEToPAE_Relocate(PVM pVM, PVMMSWITCHERDEF pSwitcher, RTR0PTR R0PtrCode, uint8_t *pu8CodeR3, RTGCPTR GCPtrCode, uint32_t u32IDCode)
890	{
891	vmmR3SwitcherGenericRelocate(pVM, pSwitcher, R0PtrCode, pu8CodeR3, GCPtrCode, u32IDCode,
892	SELMGetHyperCS(pVM), SELMGetHyperDS(pVM), SELMGetHyperTSS(pVM), SELMGetHyperGDT(pVM), 0);
893	}
894
895	/**
896	* Relocator for the PAE to AMD64 world switcher.
897	*/
898	DECLCALLBACK(void) vmmR3SwitcherPAEToAMD64_Relocate(PVM pVM, PVMMSWITCHERDEF pSwitcher, RTR0PTR R0PtrCode, uint8_t *pu8CodeR3, RTGCPTR GCPtrCode, uint32_t u32IDCode)
899	{
900	vmmR3SwitcherGenericRelocate(pVM, pSwitcher, R0PtrCode, pu8CodeR3, GCPtrCode, u32IDCode,
901	SELMGetHyperCS(pVM), SELMGetHyperDS(pVM), SELMGetHyperTSS(pVM), SELMGetHyperGDT(pVM), SELMGetHyperCS64(pVM));
902	}
903
904
905	/**
906	* Relocator for the AMD64 to 32-bit world switcher.
907	*/
908	DECLCALLBACK(void) vmmR3SwitcherAMD64To32Bit_Relocate(PVM pVM, PVMMSWITCHERDEF pSwitcher, RTR0PTR R0PtrCode, uint8_t *pu8CodeR3, RTGCPTR GCPtrCode, uint32_t u32IDCode)
909	{
910	vmmR3SwitcherGenericRelocate(pVM, pSwitcher, R0PtrCode, pu8CodeR3, GCPtrCode, u32IDCode,
911	SELMGetHyperCS(pVM), SELMGetHyperDS(pVM), SELMGetHyperTSS(pVM), SELMGetHyperGDT(pVM), SELMGetHyperCS64(pVM));
912	}
913
914
915	/**
916	* Relocator for the AMD64 to PAE world switcher.
917	*/
918	DECLCALLBACK(void) vmmR3SwitcherAMD64ToPAE_Relocate(PVM pVM, PVMMSWITCHERDEF pSwitcher, RTR0PTR R0PtrCode, uint8_t *pu8CodeR3, RTGCPTR GCPtrCode, uint32_t u32IDCode)
919	{
920	vmmR3SwitcherGenericRelocate(pVM, pSwitcher, R0PtrCode, pu8CodeR3, GCPtrCode, u32IDCode,
921	SELMGetHyperCS(pVM), SELMGetHyperDS(pVM), SELMGetHyperTSS(pVM), SELMGetHyperGDT(pVM), SELMGetHyperCS64(pVM));
922	}
923
924
925	/**
926	* Selects the switcher to be used for switching to GC.
927	*
928	* @returns VBox status code.
929	* @param pVM VM handle.
930	* @param enmSwitcher The new switcher.
931	* @remark This function may be called before the VMM is initialized.
932	*/
933	VMMR3DECL(int) VMMR3SelectSwitcher(PVM pVM, VMMSWITCHER enmSwitcher)
934	{
935	/*
936	* Validate input.
937	*/
938	if ( enmSwitcher < VMMSWITCHER_INVALID
939	\|\| enmSwitcher >= VMMSWITCHER_MAX)
940	{
941	AssertMsgFailed(("Invalid input enmSwitcher=%d\n", enmSwitcher));
942	return VERR_INVALID_PARAMETER;
943	}
944
945	/* Do nothing if the switcher is disabled. */
946	if (pVM->vmm.s.fSwitcherDisabled)
947	return VINF_SUCCESS;
948
949	/*
950	* Select the new switcher.
951	*/
952	PVMMSWITCHERDEF pSwitcher = s_apSwitchers[enmSwitcher];
953	if (pSwitcher)
954	{
955	Log(("VMMR3SelectSwitcher: enmSwitcher %d -> %d %s\n", pVM->vmm.s.enmSwitcher, enmSwitcher, pSwitcher->pszDesc));
956	pVM->vmm.s.enmSwitcher = enmSwitcher;
957
958	RTR0PTR pbCodeR0 = (RTR0PTR)pVM->vmm.s.pvCoreCodeR0 + pVM->vmm.s.aoffSwitchers[enmSwitcher]; /** @todo fix the pvCoreCodeR0 type */
959	pVM->vmm.s.pfnHostToGuestR0 = pbCodeR0 + pSwitcher->offR0HostToGuest;
960
961	RTGCPTR GCPtr = pVM->vmm.s.pvCoreCodeRC + pVM->vmm.s.aoffSwitchers[enmSwitcher];
962	pVM->vmm.s.pfnGuestToHostRC = GCPtr + pSwitcher->offGCGuestToHost;
963	pVM->vmm.s.pfnCallTrampolineRC = GCPtr + pSwitcher->offGCCallTrampoline;
964	pVM->pfnVMMGCGuestToHostAsm = GCPtr + pSwitcher->offGCGuestToHostAsm;
965	pVM->pfnVMMGCGuestToHostAsmHyperCtx = GCPtr + pSwitcher->offGCGuestToHostAsmHyperCtx;
966	pVM->pfnVMMGCGuestToHostAsmGuestCtx = GCPtr + pSwitcher->offGCGuestToHostAsmGuestCtx;
967	return VINF_SUCCESS;
968	}
969
970	return VERR_NOT_IMPLEMENTED;
971	}
972
973
974	/**
975	* Disable the switcher logic permanently.
976	*
977	* @returns VBox status code.
978	* @param pVM VM handle.
979	*/
980	VMMR3DECL(int) VMMR3DisableSwitcher(PVM pVM)
981	{
982	/** @todo r=bird: I would suggest that we create a dummy switcher which just does something like:
983	* @code
984	* mov eax, VERR_INTERNAL_ERROR
985	* ret
986	* @endcode
987	* And then check for fSwitcherDisabled in VMMR3SelectSwitcher() in order to prevent it from being removed.
988	*/
989	pVM->vmm.s.fSwitcherDisabled = true;
990	return VINF_SUCCESS;
991	}
992
993
994	/**
995	* Gets the switcher to be used for switching to GC.
996	*
997	* @returns host to guest ring 0 switcher entrypoint
998	* @param pVM VM handle.
999	* @param enmSwitcher The new switcher.
1000	*/
1001	VMMR3DECL(RTR0PTR) VMMR3GetHostToGuestSwitcher(PVM pVM, VMMSWITCHER enmSwitcher)
1002	{
1003	/*
1004	* Validate input.
1005	*/
1006	if ( enmSwitcher < VMMSWITCHER_INVALID
1007	\|\| enmSwitcher >= VMMSWITCHER_MAX)
1008	{
1009	AssertMsgFailed(("Invalid input enmSwitcher=%d\n", enmSwitcher));
1010	return NIL_RTR0PTR;
1011	}
1012
1013	/*
1014	* Select the new switcher.
1015	*/
1016	PVMMSWITCHERDEF pSwitcher = s_apSwitchers[enmSwitcher];
1017	if (pSwitcher)
1018	{
1019	RTR0PTR pbCodeR0 = (RTR0PTR)pVM->vmm.s.pvCoreCodeR0 + pVM->vmm.s.aoffSwitchers[enmSwitcher]; /** @todo fix the pvCoreCodeR0 type */
1020	return pbCodeR0 + pSwitcher->offR0HostToGuest;
1021	}
1022	return NIL_RTR0PTR;
1023	}

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source: vbox/trunk/src/VBox/VMM/VMMSwitcher.cpp@ 26638

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