PDMLdr.cpp@ 5219

Last change on this file since 5219 was 5056, checked in by vboxsync, 17 years ago
assertion was the wrong way around. typical 2am bug.
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1	/* $Id: PDMLdr.cpp 5056 2007-09-26 16:08:23Z vboxsync $ */
2	/** @file
3	* PDM - Pluggable Device Manager, module loader.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 innotek GmbH
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 as published by the Free Software Foundation,
13	* in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
14	* distribution. VirtualBox OSE is distributed in the hope that it will
15	* be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18	//#define PDMLDR_FAKE_MODE
19
20	/*******************************************************************************
21	* Header Files *
22	*******************************************************************************/
23	#define LOG_GROUP LOG_GROUP_PDM_LDR
24	#include "PDMInternal.h"
25	#include <VBox/pdm.h>
26	#include <VBox/mm.h>
27	#include <VBox/vmm.h>
28	#include <VBox/vm.h>
29	#include <VBox/sup.h>
30	#include <VBox/param.h>
31	#include <VBox/err.h>
32	#include <VBox/hwaccm.h>
33
34	#include <VBox/log.h>
35	#include <iprt/assert.h>
36	#include <iprt/alloc.h>
37	#include <iprt/ldr.h>
38	#include <iprt/path.h>
39	#include <iprt/string.h>
40
41	#include <limits.h>
42
43
44	/*******************************************************************************
45	* Structures and Typedefs *
46	*******************************************************************************/
47	/**
48	* Structure which the user argument of the RTLdrGetBits() callback points to.
49	* @internal
50	*/
51	typedef struct PDMGETIMPORTARGS
52	{
53	PVM pVM;
54	PPDMMOD pModule;
55	} PDMGETIMPORTARGS, *PPDMGETIMPORTARGS;
56
57
58	/*******************************************************************************
59	* Internal Functions *
60	*******************************************************************************/
61	static DECLCALLBACK(int) pdmr3GetImportGC(RTLDRMOD hLdrMod, const char pszModule, const char pszSymbol, unsigned uSymbol, RTUINTPTR pValue, void pvUser);
62	static int pdmR3LoadR0(PVM pVM, const char pszFilename, const char pszName);
63	static char * pdmR3FileGC(const char *pszFile);
64	static char * pdmR3FileR0(const char *pszFile);
65	static char * pdmR3File(const char pszFile, const char pszDefaultExt, bool fShared);
66	static DECLCALLBACK(int) pdmR3QueryModFromEIPEnumSymbols(RTLDRMOD hLdrMod, const char pszSymbol, unsigned uSymbol, RTUINTPTR Value, void pvUser);
67
68
69
70	/**
71	* Loads the VMMR0.r0 module before the VM is created.
72	*
73	* The opqaue VMMR0 module pointer is passed on to PDMR3Init later in
74	* the init process or PDMR3LdrUnloadVMMR0 in case of some init failure before PDMR3Init.
75	*
76	* @returns VBox status code.
77	* @param ppvOpaque Where to return the opaque VMMR0.r0 module handle one success.
78	*
79	* @remarks Yes, this is a kind of hacky and should go away. See @todo in VMR3Create.
80	*/
81	PDMR3DECL(int) PDMR3LdrLoadVMMR0(void **ppvOpaque)
82	{
83	*ppvOpaque = NULL;
84
85	/*
86	* Resolve the filename and allocate the module list node.
87	*/
88	char *pszFilename = pdmR3FileR0(VMMR0_MAIN_MODULE_NAME);
89	PPDMMOD pModule = (PPDMMOD)RTMemAllocZ(sizeof(*pModule) + strlen(pszFilename));
90	if (!pModule)
91	{
92	RTMemTmpFree(pszFilename);
93	return VERR_NO_MEMORY;
94	}
95	strcpy(pModule->szName, VMMR0_MAIN_MODULE_NAME);
96	pModule->eType = PDMMOD_TYPE_R0;
97	strcpy(pModule->szFilename, pszFilename);
98	RTMemTmpFree(pszFilename);
99
100	/*
101	* Ask the support library to load it.
102	*/
103	void *pvImageBase;
104	int rc = SUPLoadModule(pModule->szFilename, pModule->szName, &pvImageBase);
105	if (RT_SUCCESS(rc))
106	{
107	pModule->hLdrMod = NIL_RTLDRMOD;
108	pModule->ImageBase = (uintptr_t)pvImageBase;
109	*ppvOpaque = pModule;
110
111	Log(("PDMR3LdrLoadVMMR0: Loaded %s at %VGvx (%s)\n", pModule->szName, (RTGCPTR)pModule->ImageBase, pModule->szFilename));
112	return VINF_SUCCESS;
113	}
114
115	LogRel(("PDMR3LdrLoadVMMR0: rc=%Vrc szName=%s szFilename=%s\n", rc, pModule->szName, pModule->szFilename));
116	RTMemFree(pModule);
117	return rc;
118	}
119
120
121	/**
122	* Register the VMMR0.r0 module with the created VM or unload it if
123	* we failed to create the VM (pVM == NULL).
124	*
125	* @param pVM The VM pointer. NULL if we failed to create the VM and
126	* the module should be unloaded and freed.
127	* @param pvOpaque The value returned by PDMR3LDrLoadVMMR0().
128	*
129	* @remarks Yes, this is a kind of hacky and should go away. See @todo in VMR3Create.
130	*/
131	PDMR3DECL(void) PDMR3LdrLoadVMMR0Part2(PVM pVM, void *pvOpaque)
132	{
133	PPDMMOD pModule = (PPDMMOD)pvOpaque;
134	AssertPtrReturnVoid(pModule);
135
136	if (pVM)
137	{
138	/*
139	* Register the R0 module loaded by PDMR3LdrLoadVMMR0
140	*/
141	Assert(!pVM->pdm.s.pModules);
142	pModule->pNext = pVM->pdm.s.pModules;
143	pVM->pdm.s.pModules = pModule;
144	}
145	else
146	{
147	/*
148	* Failed, unload the module.
149	*/
150	int rc2 = SUPFreeModule((void *)(uintptr_t)pModule->ImageBase);
151	AssertRC(rc2);
152	pModule->ImageBase = 0;
153	RTMemFree(pvOpaque);
154	}
155	}
156
157
158	/**
159	* Init the module loader part of PDM.
160	*
161	* This routine will load the Host Context Ring-0 and Guest
162	* Context VMM modules.
163	*
164	* @returns VBox stutus code.
165	* @param pVM VM handle.
166	* @param pvVMMR0Mod The opqaue returned by PDMR3LdrLoadVMMR0.
167	*/
168	int pdmR3LdrInit(PVM pVM)
169	{
170	#ifdef PDMLDR_FAKE_MODE
171	return VINF_SUCCESS;
172
173	#else
174
175	/*
176	* Load the mandatory GC module, the VMMR0.r0 is loaded before VM creation.
177	*/
178	return PDMR3LoadGC(pVM, NULL, VMMGC_MAIN_MODULE_NAME);
179	#endif
180	}
181
182
183	/**
184	* Terminate the module loader part of PDM.
185	*
186	* This will unload and free all modules.
187	*
188	* @param pVM The VM handle.
189	*/
190	void pdmR3LdrTerm(PVM pVM)
191	{
192	/*
193	* Free the modules.
194	*/
195	PPDMMOD pModule = pVM->pdm.s.pModules;
196	while (pModule)
197	{
198	/* free loader item. */
199	if (pModule->hLdrMod != NIL_RTLDRMOD)
200	{
201	int rc2 = RTLdrClose(pModule->hLdrMod);
202	AssertRC(rc2);
203	pModule->hLdrMod = NIL_RTLDRMOD;
204	}
205
206	/* free bits. */
207	switch (pModule->eType)
208	{
209	case PDMMOD_TYPE_R0:
210	{
211	Assert(pModule->ImageBase);
212	int rc2 = SUPFreeModule((void *)(uintptr_t)pModule->ImageBase);
213	AssertRC(rc2);
214	pModule->ImageBase = 0;
215	break;
216	}
217
218	case PDMMOD_TYPE_GC:
219	case PDMMOD_TYPE_R3:
220	/* MM will free this memory for us - it's alloc only memory. :-) */
221	break;
222
223	default:
224	AssertMsgFailed(("eType=%d\n", pModule->eType));
225	break;
226	}
227	pModule->pvBits = NULL;
228
229	void *pvFree = pModule;
230	pModule = pModule->pNext;
231	RTMemFree(pvFree);
232	}
233	}
234
235
236	/**
237	* Applies relocations to GC modules.
238	*
239	* This must be done very early in the relocation
240	* process so that components can resolve GC symbols during relocation.
241	*
242	* @param pVM VM handle.
243	* @param offDelta Relocation delta relative to old location.
244	*/
245	PDMR3DECL(void) PDMR3LdrRelocate(PVM pVM, RTGCINTPTR offDelta)
246	{
247	LogFlow(("PDMR3LdrRelocate: offDelta=%VGv\n", offDelta));
248
249	/*
250	* GC Modules.
251	*/
252	if (pVM->pdm.s.pModules)
253	{
254	/*
255	* The relocation have to be done in two passes so imports
256	* can be correctely resolved. The first pass will update
257	* the ImageBase saving the current value in OldImageBase.
258	* The second pass will do the actual relocation.
259	*/
260	/* pass 1 */
261	PPDMMOD pCur;
262	for (pCur = pVM->pdm.s.pModules; pCur; pCur = pCur->pNext)
263	{
264	if (pCur->eType == PDMMOD_TYPE_GC)
265	{
266	pCur->OldImageBase = pCur->ImageBase;
267	pCur->ImageBase = MMHyperHC2GC(pVM, pCur->pvBits);
268	}
269	}
270
271	/* pass 2 */
272	for (pCur = pVM->pdm.s.pModules; pCur; pCur = pCur->pNext)
273	{
274	if (pCur->eType == PDMMOD_TYPE_GC)
275	{
276	PDMGETIMPORTARGS Args;
277	Args.pVM = pVM;
278	Args.pModule = pCur;
279	int rc = RTLdrRelocate(pCur->hLdrMod, pCur->pvBits, pCur->ImageBase, pCur->OldImageBase,
280	pdmr3GetImportGC, &Args);
281	AssertFatalMsgRC(rc, ("RTLdrRelocate failed, rc=%d\n", rc));
282	DBGFR3ModuleRelocate(pVM, pCur->OldImageBase, pCur->ImageBase, RTLdrSize(pCur->hLdrMod),
283	pCur->szFilename, pCur->szName);
284	}
285	}
286	}
287	}
288
289
290	/**
291	* Loads a module into the host context ring-3.
292	*
293	* This is used by the driver and device init functions to load modules
294	* containing the drivers and devices. The function can be extended to
295	* load modules which are not native to the environment we're running in,
296	* but at the moment this is not required.
297	*
298	* No reference counting is kept, since we don't implement any facilities
299	* for unloading the module. But the module will naturally be released
300	* when the VM terminates.
301	*
302	* @returns VBox status code.
303	* @param pVM The VM to load it into.
304	* @param pszFilename Filename of the module binary.
305	* @param pszName Module name. Case sensitive and the length is limited!
306	*/
307	int pdmR3LoadR3(PVM pVM, const char pszFilename, const char pszName)
308	{
309	/*
310	* Validate input.
311	*/
312	AssertMsg(pVM->pdm.s.offVM, ("bad init order!\n"));
313	Assert(pszFilename);
314	size_t cchFilename = strlen(pszFilename);
315	Assert(pszName);
316	size_t cchName = strlen(pszName);
317	PPDMMOD pCur;
318	if (cchName >= sizeof(pCur->szName))
319	{
320	AssertMsgFailed(("Name is too long, cchName=%d pszName='%s'\n", cchName, pszName));
321	return VERR_INVALID_PARAMETER;
322	}
323
324	/*
325	* Try lookup the name and see if the module exists.
326	*/
327	for (pCur = pVM->pdm.s.pModules; pCur; pCur = pCur->pNext)
328	{
329	if (!strcmp(pCur->szName, pszName))
330	{
331	if (pCur->eType == PDMMOD_TYPE_R3)
332	return VINF_PDM_ALREADY_LOADED;
333	AssertMsgFailed(("We've already got a module '%s' loaded!\n", pszName));
334	return VERR_PDM_MODULE_NAME_CLASH;
335	}
336	}
337
338	/*
339	* Allocate the module list node and initialize it.
340	*/
341	PPDMMOD pModule = (PPDMMOD)RTMemAllocZ(sizeof(*pModule) + cchFilename);
342	if (!pModule)
343	return VERR_NO_MEMORY;
344
345	pModule->eType = PDMMOD_TYPE_R3;
346	memcpy(pModule->szName, pszName, cchName); /* memory is zero'ed, no need to copy terminator :-) */
347	memcpy(pModule->szFilename, pszFilename, cchFilename);
348
349	/*
350	* Load the loader item.
351	*/
352	int rc = RTLdrLoad(pszFilename, &pModule->hLdrMod);
353	if (VBOX_SUCCESS(rc))
354	{
355	pModule->pNext = pVM->pdm.s.pModules;
356	pVM->pdm.s.pModules = pModule;
357	return rc;
358	}
359
360	/* Something went wrong, most likely module not found. Don't consider other unlikely errors */
361	RTMemFree(pModule);
362	return VMSetError(pVM, rc, RT_SRC_POS, N_("Unable to load R3 module %s"), pszFilename);
363	}
364
365
366	/**
367	* Resolve an external symbol during RTLdrGetBits() of a GC module.
368	*
369	* @returns VBox status code.
370	* @param hLdrMod The loader module handle.
371	* @param pszModule Module name.
372	* @param pszSymbol Symbol name, NULL if uSymbol should be used.
373	* @param uSymbol Symbol ordinal, ~0 if pszSymbol should be used.
374	* @param pValue Where to store the symbol value (address).
375	* @param pvUser User argument.
376	*/
377	static DECLCALLBACK(int) pdmr3GetImportGC(RTLDRMOD hLdrMod, const char pszModule, const char pszSymbol, unsigned uSymbol, RTUINTPTR pValue, void pvUser)
378	{
379	PVM pVM = ((PPDMGETIMPORTARGS)pvUser)->pVM;
380	PPDMMOD pModule = ((PPDMGETIMPORTARGS)pvUser)->pModule;
381
382	/*
383	* Adjust input.
384	*/
385	if (pszModule && !*pszModule)
386	pszModule = NULL;
387
388	/*
389	* Builtin module.
390	*/
391	if (!pszModule \|\| !strcmp(pszModule, "VMMGCBuiltin.gc"))
392	{
393	int rc = VINF_SUCCESS;
394	if (!strcmp(pszSymbol, "g_VM"))
395	*pValue = pVM->pVMGC;
396	else if (!strcmp(pszSymbol, "g_CPUM"))
397	*pValue = VM_GUEST_ADDR(pVM, &pVM->cpum);
398	else if (!strcmp(pszSymbol, "g_TRPM"))
399	*pValue = VM_GUEST_ADDR(pVM, &pVM->trpm);
400	else if ( !strncmp(pszSymbol, "VMM", 3)
401	\|\| !strcmp(pszSymbol, "g_Logger")
402	\|\| !strcmp(pszSymbol, "g_RelLogger"))
403	{
404	RTGCPTR GCPtr = 0;
405	rc = VMMR3GetImportGC(pVM, pszSymbol, &GCPtr);
406	if (VBOX_SUCCESS(rc))
407	*pValue = GCPtr;
408	}
409	else if ( !strncmp(pszSymbol, "TM", 2)
410	\|\| !strcmp(pszSymbol, "g_pSUPGlobalInfoPage"))
411	{
412	RTGCPTR GCPtr = 0;
413	rc = TMR3GetImportGC(pVM, pszSymbol, &GCPtr);
414	if (VBOX_SUCCESS(rc))
415	*pValue = GCPtr;
416	}
417	else
418	{
419	AssertMsg(!pszModule, ("Unknown builtin symbol '%s' for module '%s'!\n", pszSymbol, pModule->szName)); NOREF(pModule);
420	rc = VERR_SYMBOL_NOT_FOUND;
421	}
422	if (VBOX_SUCCESS(rc) \|\| pszModule)
423	return rc;
424	}
425
426	/*
427	* Search for module.
428	*/
429	PPDMMOD pCur = pVM->pdm.s.pModules;
430	while (pCur)
431	{
432	if ( pCur->eType == PDMMOD_TYPE_GC
433	&& ( !pszModule
434	\|\| !strcmp(pCur->szName, pszModule))
435	)
436	{
437	/* Search for the symbol. */
438	int rc = RTLdrGetSymbolEx(pCur->hLdrMod, pCur->pvBits, pCur->ImageBase, pszSymbol, pValue);
439	if (VBOX_SUCCESS(rc))
440	{
441	AssertMsg(*pValue - pCur->ImageBase < RTLdrSize(pCur->hLdrMod),
442	("%VGv-%VGv %s %VGv\n", (RTGCPTR)pCur->ImageBase,
443	(RTGCPTR)(pCur->ImageBase + RTLdrSize(pCur->hLdrMod) - 1),
444	pszSymbol, (RTGCPTR)*pValue));
445	return rc;
446	}
447	if (pszModule)
448	{
449	AssertMsgFailed(("Couldn't find symbol '%s' in module '%s'!\n", pszSymbol, pszModule));
450	LogRel(("PDMLdr: Couldn't find symbol '%s' in module '%s'!\n", pszSymbol, pszModule));
451	return VERR_SYMBOL_NOT_FOUND;
452	}
453	}
454
455	/* next */
456	pCur = pCur->pNext;
457	}
458
459	AssertMsgFailed(("Couldn't find module '%s' for resolving symbol '%s'!\n", pszModule, pszSymbol));
460	return VERR_SYMBOL_NOT_FOUND;
461	}
462
463
464	/**
465	* Loads a module into the guest context (i.e. into the Hypervisor memory region).
466	*
467	* The external (to PDM) use of this interface is to load VMMGC.gc.
468	*
469	* @returns VBox status code.
470	* @param pVM The VM to load it into.
471	* @param pszFilename Filename of the module binary.
472	* @param pszName Module name. Case sensitive and the length is limited!
473	*/
474	PDMR3DECL(int) PDMR3LoadGC(PVM pVM, const char pszFilename, const char pszName)
475	{
476	/*
477	* Validate input.
478	*/
479	AssertMsg(pVM->pdm.s.offVM, ("bad init order!\n"));
480	PPDMMOD pCur = pVM->pdm.s.pModules;
481	while (pCur)
482	{
483	if (!strcmp(pCur->szName, pszName))
484	{
485	AssertMsgFailed(("We've already got a module '%s' loaded!\n", pszName));
486	return VERR_PDM_MODULE_NAME_CLASH;
487	}
488	/* next */
489	pCur = pCur->pNext;
490	}
491
492	/*
493	* Find the file if not specified.
494	*/
495	char *pszFile = NULL;
496	if (!pszFilename)
497	pszFilename = pszFile = pdmR3FileGC(pszName);
498
499	/*
500	* Allocate the module list node.
501	*/
502	PPDMMOD pModule = (PPDMMOD)RTMemAllocZ(sizeof(*pModule) + strlen(pszFilename));
503	if (!pModule)
504	{
505	RTMemTmpFree(pszFile);
506	return VERR_NO_MEMORY;
507	}
508	AssertMsg(strlen(pszName) + 1 < sizeof(pModule->szName),
509	("pazName is too long (%d chars) max is %d chars.\n", strlen(pszName), sizeof(pModule->szName) - 1));
510	strcpy(pModule->szName, pszName);
511	pModule->eType = PDMMOD_TYPE_GC;
512	strcpy(pModule->szFilename, pszFilename);
513
514
515	/*
516	* Open the loader item.
517	*/
518	int rc = RTLdrOpen(pszFilename, &pModule->hLdrMod);
519	if (VBOX_SUCCESS(rc))
520	{
521	/*
522	* Allocate space in the hypervisor.
523	*/
524	size_t cb = RTLdrSize(pModule->hLdrMod);
525	cb = RT_ALIGN_Z(cb, PAGE_SIZE);
526	rc = SUPPageAlloc(cb >> PAGE_SHIFT, &pModule->pvBits);
527	if (VBOX_SUCCESS(rc))
528	{
529	RTGCPTR GCPtr;
530	rc = MMR3HyperMapHCRam(pVM, pModule->pvBits, cb, true, pModule->szName, &GCPtr);
531	if (VBOX_SUCCESS(rc))
532	{
533	MMR3HyperReserve(pVM, PAGE_SIZE, "fence", NULL);
534
535	/*
536	* Get relocated image bits.
537	*/
538	Assert(MMHyperHC2GC(pVM, pModule->pvBits) == GCPtr);
539	pModule->ImageBase = GCPtr;
540	PDMGETIMPORTARGS Args;
541	Args.pVM = pVM;
542	Args.pModule = pModule;
543	rc = RTLdrGetBits(pModule->hLdrMod, pModule->pvBits, pModule->ImageBase, pdmr3GetImportGC, &Args);
544	if (VBOX_SUCCESS(rc))
545	{
546	/*
547	* Insert the module.
548	*/
549	if (pVM->pdm.s.pModules)
550	{
551	/* we don't expect this list to be very long, so rather save the tail pointer. */
552	PPDMMOD pCur = pVM->pdm.s.pModules;
553	while (pCur->pNext)
554	pCur = pCur->pNext;
555	pCur->pNext = pModule;
556	}
557	else
558	pVM->pdm.s.pModules = pModule; /* (pNext is zeroed by alloc) */
559	Log(("PDM: GC Module at %VGvx %s (%s)\n", (RTGCPTR)pModule->ImageBase, pszName, pszFilename));
560	RTMemTmpFree(pszFile);
561	return VINF_SUCCESS;
562	}
563	}
564	else
565	{
566	AssertRC(rc);
567	SUPPageFree(pModule->pvBits, cb >> PAGE_SHIFT);
568	}
569	}
570	else
571	AssertMsgFailed(("SUPPageAlloc(%d,) -> %Vrc\n", cb >> PAGE_SHIFT, rc));
572	int rc2 = RTLdrClose(pModule->hLdrMod);
573	AssertRC(rc2);
574	}
575	RTMemFree(pModule);
576	RTMemTmpFree(pszFile);
577
578	/* Don't consider VERR_PDM_MODULE_NAME_CLASH and VERR_NO_MEMORY above as these are very unlikely. */
579	if (VBOX_FAILURE(rc))
580	return VMSetError(pVM, rc, RT_SRC_POS, N_("Cannot load GC module %s"), pszFilename);
581	return rc;
582	}
583
584
585	/**
586	* Loads a module into the ring-0 context.
587	*
588	* @returns VBox status code.
589	* @param pVM The VM to load it into.
590	* @param pszFilename Filename of the module binary.
591	* @param pszName Module name. Case sensitive and the length is limited!
592	*/
593	static int pdmR3LoadR0(PVM pVM, const char pszFilename, const char pszName)
594	{
595	/*
596	* Validate input.
597	*/
598	AssertMsg(pVM->pdm.s.offVM, ("bad init order!\n"));
599	PPDMMOD pCur = pVM->pdm.s.pModules;
600	while (pCur)
601	{
602	if (!strcmp(pCur->szName, pszName))
603	{
604	AssertMsgFailed(("We've already got a module '%s' loaded!\n", pszName));
605	return VERR_PDM_MODULE_NAME_CLASH;
606	}
607	/* next */
608	pCur = pCur->pNext;
609	}
610	AssertReturn(strcmp(pszName, VMMR0_MAIN_MODULE_NAME), VERR_INTERNAL_ERROR);
611
612	/*
613	* Find the file if not specified.
614	*/
615	char *pszFile = NULL;
616	if (!pszFilename)
617	pszFilename = pszFile = pdmR3FileR0(pszName);
618
619	/*
620	* Allocate the module list node.
621	*/
622	PPDMMOD pModule = (PPDMMOD)RTMemAllocZ(sizeof(*pModule) + strlen(pszFilename));
623	if (!pModule)
624	{
625	RTMemTmpFree(pszFile);
626	return VERR_NO_MEMORY;
627	}
628	AssertMsg(strlen(pszName) + 1 < sizeof(pModule->szName),
629	("pazName is too long (%d chars) max is %d chars.\n", strlen(pszName), sizeof(pModule->szName) - 1));
630	strcpy(pModule->szName, pszName);
631	pModule->eType = PDMMOD_TYPE_R0;
632	strcpy(pModule->szFilename, pszFilename);
633
634	/*
635	* Ask the support library to load it.
636	*/
637	void *pvImageBase;
638	int rc = SUPLoadModule(pszFilename, pszName, &pvImageBase);
639	if (VBOX_SUCCESS(rc))
640	{
641	pModule->hLdrMod = NIL_RTLDRMOD;
642	pModule->ImageBase = (uintptr_t)pvImageBase;
643
644	/*
645	* Insert the module.
646	*/
647	if (pVM->pdm.s.pModules)
648	{
649	/* we don't expect this list to be very long, so rather save the tail pointer. */
650	PPDMMOD pCur = pVM->pdm.s.pModules;
651	while (pCur->pNext)
652	pCur = pCur->pNext;
653	pCur->pNext = pModule;
654	}
655	else
656	pVM->pdm.s.pModules = pModule; /* (pNext is zeroed by alloc) */
657	Log(("PDM: GC Module at %VGvx %s (%s)\n", (RTGCPTR)pModule->ImageBase, pszName, pszFilename));
658	RTMemTmpFree(pszFile);
659	return VINF_SUCCESS;
660	}
661
662	RTMemFree(pModule);
663	RTMemTmpFree(pszFile);
664	LogRel(("pdmR3LoadR0: pszName=\"%s\" rc=%Vrc\n", pszName, rc));
665
666	/* Don't consider VERR_PDM_MODULE_NAME_CLASH and VERR_NO_MEMORY above as these are very unlikely. */
667	if (VBOX_FAILURE(rc))
668	return VMSetError(pVM, rc, RT_SRC_POS, N_("Cannot load R0 module %s"), pszFilename);
669	return rc;
670	}
671
672
673
674	/**
675	* Get the address of a symbol in a given HC ring 3 module.
676	*
677	* @returns VBox status code.
678	* @param pVM VM handle.
679	* @param pszModule Module name.
680	* @param pszSymbol Symbol name. If it's value is less than 64k it's treated like a
681	* ordinal value rather than a string pointer.
682	* @param ppvValue Where to store the symbol value.
683	*/
684	PDMR3DECL(int) PDMR3GetSymbolR3(PVM pVM, const char pszModule, const char pszSymbol, void **ppvValue)
685	{
686	/*
687	* Validate input.
688	*/
689	AssertMsg(pVM->pdm.s.offVM, ("bad init order!\n"));
690
691	/*
692	* Find the module.
693	*/
694	for (PPDMMOD pModule = pVM->pdm.s.pModules; pModule; pModule = pModule->pNext)
695	{
696	if ( pModule->eType == PDMMOD_TYPE_R3
697	&& !strcmp(pModule->szName, pszModule))
698	{
699	RTUINTPTR Value = 0;
700	int rc = RTLdrGetSymbolEx(pModule->hLdrMod, pModule->pvBits, pModule->ImageBase, pszSymbol, &Value);
701	if (VBOX_SUCCESS(rc))
702	{
703	ppvValue = (void )(uintptr_t)Value;
704	Assert((uintptr_t)*ppvValue == Value);
705	}
706	else
707	{
708	if (pszSymbol < (const char)(void)0x10000)
709	AssertMsg(rc, ("Couldn't symbol '%u' in module '%s'\n", (unsigned)(uintptr_t)pszSymbol, pszModule));
710	else
711	AssertMsg(rc, ("Couldn't symbol '%s' in module '%s'\n", pszSymbol, pszModule));
712	}
713	return rc;
714	}
715	}
716
717	AssertMsgFailed(("Couldn't locate module '%s'\n", pszModule));
718	return VERR_SYMBOL_NOT_FOUND;
719	}
720
721
722	/**
723	* Get the address of a symbol in a given HC ring 0 module.
724	*
725	* @returns VBox status code.
726	* @param pVM VM handle.
727	* @param pszModule Module name. If NULL the main R0 module (VMMR0.r0) is assumes.
728	* @param pszSymbol Symbol name. If it's value is less than 64k it's treated like a
729	* ordinal value rather than a string pointer.
730	* @param ppvValue Where to store the symbol value.
731	*/
732	PDMR3DECL(int) PDMR3GetSymbolR0(PVM pVM, const char pszModule, const char pszSymbol, PRTR0PTR ppvValue)
733	{
734	#ifdef PDMLDR_FAKE_MODE
735	*ppvValue = 0xdeadbeef;
736	return VINF_SUCCESS;
737
738	#else
739	/*
740	* Validate input.
741	*/
742	AssertMsg(pVM->pdm.s.offVM, ("bad init order!\n"));
743	if (!pszModule)
744	pszModule = "VMMR0.r0";
745
746	/*
747	* Find the module.
748	*/
749	for (PPDMMOD pModule = pVM->pdm.s.pModules; pModule; pModule = pModule->pNext)
750	{
751	if ( pModule->eType == PDMMOD_TYPE_R0
752	&& !strcmp(pModule->szName, pszModule))
753	{
754	int rc = SUPGetSymbolR0((void )(uintptr_t)pModule->ImageBase, pszSymbol, (void *)ppvValue);
755	if (VBOX_FAILURE(rc))
756	{
757	AssertMsgRC(rc, ("Couldn't find symbol '%s' in module '%s'\n", pszSymbol, pszModule));
758	LogRel(("PDMGetSymbol: Couldn't find symbol '%s' in module '%s'\n", pszSymbol, pszModule));
759	}
760	return rc;
761	}
762	}
763
764	AssertMsgFailed(("Couldn't locate module '%s'\n", pszModule));
765	return VERR_SYMBOL_NOT_FOUND;
766	#endif
767	}
768
769
770	/**
771	* Same as PDMR3GetSymbolR0 except that the module will be attempted loaded if not found.
772	*
773	* @returns VBox status code.
774	* @param pVM VM handle.
775	* @param pszModule Module name. If NULL the main R0 module (VMMR0.r0) is assumed.
776	* @param pszSymbol Symbol name. If it's value is less than 64k it's treated like a
777	* ordinal value rather than a string pointer.
778	* @param ppvValue Where to store the symbol value.
779	*/
780	PDMR3DECL(int) PDMR3GetSymbolR0Lazy(PVM pVM, const char pszModule, const char pszSymbol, PRTR0PTR ppvValue)
781	{
782	#ifdef PDMLDR_FAKE_MODE
783	*ppvValue = 0xdeadbeef;
784	return VINF_SUCCESS;
785
786	#else
787	/*
788	* Since we're lazy, we'll only check if the module is present
789	* and hand it over to PDMR3GetSymbolR0 when that's done.
790	*/
791	AssertMsg(pVM->pdm.s.offVM, ("bad init order!\n"));
792	if (pszModule)
793	{
794	AssertMsgReturn(!strpbrk(pszModule, "/\\:\n\r\t"), ("pszModule=%s\n", pszModule), VERR_INVALID_PARAMETER);
795	PPDMMOD pModule;
796	for (pModule = pVM->pdm.s.pModules; pModule; pModule = pModule->pNext)
797	if ( pModule->eType == PDMMOD_TYPE_R0
798	&& !strcmp(pModule->szName, pszModule))
799	break;
800	if (!pModule)
801	{
802	int rc = pdmR3LoadR0(pVM, NULL, pszModule);
803	AssertMsgRCReturn(rc, ("pszModule=%s rc=%Vrc\n", pszModule, rc), VERR_MODULE_NOT_FOUND);
804	}
805	}
806	return PDMR3GetSymbolR0(pVM, pszModule, pszSymbol, ppvValue);
807	#endif
808	}
809
810
811	/**
812	* Get the address of a symbol in a given GC module.
813	*
814	* @returns VBox status code.
815	* @param pVM VM handle.
816	* @param pszModule Module name. If NULL the main R0 module (VMMGC.gc) is assumes.
817	* @param pszSymbol Symbol name. If it's value is less than 64k it's treated like a
818	* ordinal value rather than a string pointer.
819	* @param pGCPtrValue Where to store the symbol value.
820	*/
821	PDMR3DECL(int) PDMR3GetSymbolGC(PVM pVM, const char pszModule, const char pszSymbol, PRTGCPTR pGCPtrValue)
822	{
823	#ifdef PDMLDR_FAKE_MODE
824	*pGCPtrValue = 0xfeedf00d;
825	return VINF_SUCCESS;
826
827	#else
828	/*
829	* Validate input.
830	*/
831	AssertMsg(pVM->pdm.s.offVM, ("bad init order!\n"));
832	if (!pszModule)
833	pszModule = "VMMGC.gc";
834
835	/*
836	* Find the module.
837	*/
838	for (PPDMMOD pModule = pVM->pdm.s.pModules; pModule; pModule = pModule->pNext)
839	{
840	if ( pModule->eType == PDMMOD_TYPE_GC
841	&& !strcmp(pModule->szName, pszModule))
842	{
843	RTUINTPTR Value;
844	int rc = RTLdrGetSymbolEx(pModule->hLdrMod, pModule->pvBits, pModule->ImageBase, pszSymbol, &Value);
845	if (VBOX_SUCCESS(rc))
846	{
847	*pGCPtrValue = (RTGCPTR)Value;
848	Assert(*pGCPtrValue == Value);
849	}
850	else
851	{
852	if (pszSymbol < (const char)(void)0x10000)
853	AssertMsg(rc, ("Couldn't symbol '%u' in module '%s'\n", (unsigned)(uintptr_t)pszSymbol, pszModule));
854	else
855	AssertMsg(rc, ("Couldn't symbol '%s' in module '%s'\n", pszSymbol, pszModule));
856	}
857	return rc;
858	}
859	}
860
861	AssertMsgFailed(("Couldn't locate module '%s'\n", pszModule));
862	return VERR_SYMBOL_NOT_FOUND;
863	#endif
864	}
865
866
867	/**
868	* Same as PDMR3GetSymbolGC except that the module will be attempted loaded if not found.
869	*
870	* @returns VBox status code.
871	* @param pVM VM handle.
872	* @param pszModule Module name. If NULL the main R0 module (VMMGC.gc) is assumes.
873	* @param pszSymbol Symbol name. If it's value is less than 64k it's treated like a
874	* ordinal value rather than a string pointer.
875	* @param pGCPtrValue Where to store the symbol value.
876	*/
877	PDMR3DECL(int) PDMR3GetSymbolGCLazy(PVM pVM, const char pszModule, const char pszSymbol, PRTGCPTR pGCPtrValue)
878	{
879	#ifdef PDMLDR_FAKE_MODE
880	*pGCPtrValue = 0xfeedf00d;
881	return VINF_SUCCESS;
882
883	#else
884	/*
885	* Since we're lazy, we'll only check if the module is present
886	* and hand it over to PDMR3GetSymbolGC when that's done.
887	*/
888	AssertMsg(pVM->pdm.s.offVM, ("bad init order!\n"));
889	if (pszModule)
890	{
891	AssertMsgReturn(!strpbrk(pszModule, "/\\:\n\r\t"), ("pszModule=%s\n", pszModule), VERR_INVALID_PARAMETER);
892	PPDMMOD pModule;
893	for (pModule = pVM->pdm.s.pModules; pModule; pModule = pModule->pNext)
894	if ( pModule->eType == PDMMOD_TYPE_GC
895	&& !strcmp(pModule->szName, pszModule))
896	break;
897	if (!pModule)
898	{
899	char *pszFilename = pdmR3FileGC(pszModule);
900	AssertMsgReturn(pszFilename, ("pszModule=%s\n", pszModule), VERR_MODULE_NOT_FOUND);
901	int rc = PDMR3LoadGC(pVM, pszFilename, pszModule);
902	RTMemTmpFree(pszFilename);
903	AssertMsgRCReturn(rc, ("pszModule=%s rc=%Vrc\n", pszModule, rc), VERR_MODULE_NOT_FOUND);
904	}
905	}
906	return PDMR3GetSymbolGC(pVM, pszModule, pszSymbol, pGCPtrValue);
907	#endif
908	}
909
910
911	/**
912	* Constructs the full filename for a R3 image file.
913	*
914	* @returns Pointer to temporary memory containing the filename.
915	* Caller must free this using RTMemTmpFree().
916	* @returns NULL on failure.
917	* @param pszFile File name (no path).
918	* @todo We'll have this elsewhere than in the root later!
919	*/
920	char pdmR3FileR3(const char pszFile, bool fShared)
921	{
922	return pdmR3File(pszFile, NULL, fShared);
923	}
924
925
926	/**
927	* Constructs the full filename for a R0 image file.
928	*
929	* @returns Pointer to temporary memory containing the filename.
930	* Caller must free this using RTMemTmpFree().
931	* @returns NULL on failure.
932	* @param pszFile File name (no path).
933	* @todo We'll have this elsewhere than in the root later!
934	*/
935	char * pdmR3FileR0(const char *pszFile)
936	{
937	return pdmR3File(pszFile, NULL, /fShared=/false);
938	}
939
940
941	/**
942	* Constructs the full filename for a GC image file.
943	*
944	* @returns Pointer to temporary memory containing the filename.
945	* Caller must free this using RTMemTmpFree().
946	* @returns NULL on failure.
947	* @param pszFile File name (no path).
948	* @todo We'll have this elsewhere than in the root later!
949	*/
950	char * pdmR3FileGC(const char *pszFile)
951	{
952	return pdmR3File(pszFile, NULL, /fShared=/false);
953	}
954
955
956	/**
957	* Worker for pdmR3File().
958	*
959	* @returns Pointer to temporary memory containing the filename.
960	* Caller must free this using RTMemTmpFree().
961	* @returns NULL on failure.
962	* @param pszDir Directory part
963	* @param pszFile File name part
964	* @param pszDefaultExt Extension part
965	*/
966	static char * pdmR3FileConstruct(const char pszDir, const char pszFile, const char *pszDefaultExt)
967	{
968	/*
969	* Allocate temp memory for return buffer.
970	*/
971	unsigned cchDir = strlen(pszDir);
972	unsigned cchFile = strlen(pszFile);
973	unsigned cchDefaultExt;
974
975	/*
976	* Default extention?
977	*/
978	if (!pszDefaultExt \|\| strchr(pszFile, '.'))
979	cchDefaultExt = 0;
980	else
981	cchDefaultExt = strlen(pszDefaultExt);
982
983	unsigned cchPath = cchDir + 1 + cchFile + cchDefaultExt + 1;
984	if (cchPath > RTPATH_MAX)
985	{
986	AssertMsgFailed(("Path too long!\n"));
987	return NULL;
988	}
989
990	char pszRet = (char )RTMemTmpAlloc(cchDir + 1 + cchFile + cchDefaultExt + 1);
991	if (!pszRet)
992	{
993	AssertMsgFailed(("Out of temporary memory!\n"));
994	return NULL;
995	}
996
997	/*
998	* Construct the filename.
999	*/
1000	memcpy(pszRet, pszDir, cchDir);
1001	pszRet[cchDir++] = '/'; /* this works everywhere */
1002	memcpy(pszRet + cchDir, pszFile, cchFile + 1);
1003	if (cchDefaultExt)
1004	memcpy(pszRet + cchDir + cchFile, pszDefaultExt, cchDefaultExt + 1);
1005
1006	return pszRet;
1007	}
1008
1009
1010	/**
1011	* Worker for pdmR3FileGC(), pdmR3FileR0() and pdmR3FileR3().
1012	*
1013	* @returns Pointer to temporary memory containing the filename.
1014	* Caller must free this using RTMemTmpFree().
1015	* @returns NULL on failure.
1016	* @param pszFile File name (no path).
1017	* @param pszDefaultExt The default extention, NULL if none.
1018	* @param fShared If true, search in the shared directory (/usr/lib on Unix), else
1019	* search in the private directory (/usr/lib/virtualbox on Unix).
1020	* Ignored if VBOX_PATH_SHARED_LIBS is not defined.
1021	* @todo We'll have this elsewhere than in the root later!
1022	* @todo Remove the fShared hack again once we don't need to link against VBoxDD anymore!
1023	*/
1024	static char * pdmR3File(const char pszFile, const char pszDefaultExt, bool fShared)
1025	{
1026	char szPath[RTPATH_MAX];
1027	int rc;
1028
1029	rc = fShared ? RTPathSharedLibs(szPath, sizeof(szPath))
1030	: RTPathAppPrivateArch(szPath, sizeof(szPath));
1031	if (!VBOX_SUCCESS(rc))
1032	{
1033	AssertMsgFailed(("RTPathProgram(,%d) failed rc=%d!\n", sizeof(szPath), rc));
1034	return NULL;
1035	}
1036
1037	return pdmR3FileConstruct(szPath, pszFile, pszDefaultExt);
1038	}
1039
1040
1041	/** @internal */
1042	typedef struct QMFEIPARG
1043	{
1044	uint32_t uEIP;
1045
1046	char *pszNearSym1;
1047	unsigned cchNearSym1;
1048	RTINTPTR offNearSym1;
1049
1050	char *pszNearSym2;
1051	unsigned cchNearSym2;
1052	RTINTPTR offNearSym2;
1053	} QMFEIPARG, *PQMFEIPARG;
1054
1055	/**
1056	* Queries module information from an EIP.
1057	*
1058	* This is typically used to locate a crash address.
1059	*
1060	* @returns VBox status code.
1061	* @param pVM VM handle
1062	* @param uEIP EIP to locate.
1063	* @param pszModName Where to store the module name.
1064	* @param cchModName Size of the module name buffer.
1065	* @param pMod Base address of the module.
1066	* @param pszNearSym1 Name of the closes symbol from below.
1067	* @param cchNearSym1 Size of the buffer pointed to by pszNearSym1.
1068	* @param pNearSym1 The address of pszNearSym1.
1069	* @param pszNearSym2 Name of the closes symbol from below.
1070	* @param cchNearSym2 Size of the buffer pointed to by pszNearSym2.
1071	* @param pNearSym2 The address of pszNearSym2.
1072	*/
1073	PDMR3DECL(int) PDMR3QueryModFromEIP(PVM pVM, uint32_t uEIP,
1074	char pszModName, unsigned cchModName, RTGCPTR pMod,
1075	char pszNearSym1, unsigned cchNearSym1, RTGCPTR pNearSym1,
1076	char pszNearSym2, unsigned cchNearSym2, RTGCPTR pNearSym2)
1077	{
1078	int rc = VERR_MODULE_NOT_FOUND;
1079	PPDMMOD pCur;
1080	for (pCur = pVM->pdm.s.pModules; pCur; pCur = pCur->pNext)
1081	{
1082	/* Skip anything which isn't in GC. */
1083	if (pCur->eType != PDMMOD_TYPE_GC)
1084	continue;
1085	if ((RTUINTPTR)uEIP - pCur->ImageBase < RTLdrSize(pCur->hLdrMod))
1086	{
1087	if (pMod)
1088	*pMod = pCur->ImageBase;
1089	if (pszModName && cchModName)
1090	{
1091	*pszModName = '\0';
1092	strncat(pszModName, pCur->szName, cchModName);
1093	}
1094	if (pNearSym1) *pNearSym1 = 0;
1095	if (pNearSym2) *pNearSym2 = 0;
1096	if (pszNearSym1) *pszNearSym1 = '\0';
1097	if (pszNearSym2) *pszNearSym2 = '\0';
1098
1099	/*
1100	* Locate the nearest symbols.
1101	*/
1102	QMFEIPARG Args;
1103	Args.uEIP = uEIP;
1104	Args.pszNearSym1 = pszNearSym1;
1105	Args.cchNearSym1 = cchNearSym1;
1106	Args.offNearSym1 = INT_MIN; /** @todo fix INT_MIN/MAX! */
1107	Args.pszNearSym2 = pszNearSym2;
1108	Args.cchNearSym2 = cchNearSym2;
1109	Args.offNearSym2 = INT_MAX;
1110
1111	rc = RTLdrEnumSymbols(pCur->hLdrMod, RTLDR_ENUM_SYMBOL_FLAGS_ALL, pCur->pvBits, pCur->ImageBase,
1112	pdmR3QueryModFromEIPEnumSymbols, &Args);
1113	if (pNearSym1 && Args.offNearSym1 != INT_MIN)
1114	*pNearSym1 = Args.offNearSym1 + uEIP;
1115	if (pNearSym2 && Args.offNearSym2 != INT_MAX)
1116	*pNearSym2 = Args.offNearSym2 + uEIP;
1117
1118	rc = VINF_SUCCESS;
1119	if (pCur->eType == PDMMOD_TYPE_GC)
1120	break;
1121	}
1122
1123	}
1124	return rc;
1125	}
1126
1127
1128	/**
1129	* Enumeration callback function used by RTLdrEnumSymbols().
1130	*
1131	* @returns VBox status code. Failure will stop the enumeration.
1132	* @param hLdrMod The loader module handle.
1133	* @param pszSymbol Symbol name. NULL if ordinal only.
1134	* @param uSymbol Symbol ordinal, ~0 if not used.
1135	* @param Value Symbol value.
1136	* @param pvUser The user argument specified to RTLdrEnumSymbols().
1137	*/
1138	static DECLCALLBACK(int) pdmR3QueryModFromEIPEnumSymbols(RTLDRMOD hLdrMod, const char pszSymbol, unsigned uSymbol, RTUINTPTR Value, void pvUser)
1139	{
1140	PQMFEIPARG pArgs = (PQMFEIPARG)pvUser;
1141
1142	RTINTPTR off = Value - pArgs->uEIP;
1143	if (off <= 0) /* near1 is before or at same location. */
1144	{
1145	if (off > pArgs->offNearSym1)
1146	{
1147	pArgs->offNearSym1 = off;
1148	if (pArgs->pszNearSym1 && pArgs->cchNearSym1)
1149	{
1150	*pArgs->pszNearSym1 = '\0';
1151	if (pszSymbol)
1152	strncat(pArgs->pszNearSym1, pszSymbol, pArgs->cchNearSym1);
1153	else
1154	{
1155	char szOrd[32];
1156	RTStrPrintf(szOrd, sizeof(szOrd), "#%#x", uSymbol);
1157	strncat(pArgs->pszNearSym1, szOrd, pArgs->cchNearSym1);
1158	}
1159	}
1160	}
1161	}
1162	else /* near2 is after */
1163	{
1164	if (off < pArgs->offNearSym2)
1165	{
1166	pArgs->offNearSym2 = off;
1167	if (pArgs->pszNearSym2 && pArgs->cchNearSym2)
1168	{
1169	*pArgs->pszNearSym2 = '\0';
1170	if (pszSymbol)
1171	strncat(pArgs->pszNearSym2, pszSymbol, pArgs->cchNearSym2);
1172	else
1173	{
1174	char szOrd[32];
1175	RTStrPrintf(szOrd, sizeof(szOrd), "#%#x", uSymbol);
1176	strncat(pArgs->pszNearSym2, szOrd, pArgs->cchNearSym2);
1177	}
1178	}
1179	}
1180	}
1181
1182	return VINF_SUCCESS;
1183	}
1184
1185
1186	/**
1187	* Enumerate all PDM modules.
1188	*
1189	* @returns VBox status.
1190	* @param pVM VM Handle.
1191	* @param pfnCallback Function to call back for each of the modules.
1192	* @param pvArg User argument.
1193	*/
1194	PDMR3DECL(int) PDMR3EnumModules(PVM pVM, PFNPDMR3ENUM pfnCallback, void *pvArg)
1195	{
1196	PPDMMOD pCur;
1197	for (pCur = pVM->pdm.s.pModules; pCur; pCur = pCur->pNext)
1198	{
1199	int rc = pfnCallback(pVM,
1200	pCur->szFilename,
1201	pCur->szName,
1202	pCur->ImageBase,
1203	pCur->eType == PDMMOD_TYPE_GC ? RTLdrSize(pCur->hLdrMod) : 0,
1204	pCur->eType == PDMMOD_TYPE_GC);
1205	if (VBOX_FAILURE(rc))
1206	return rc;
1207	}
1208	return VINF_SUCCESS;
1209	}
1210

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source: vbox/trunk/src/VBox/VMM/PDMLdr.cpp@ 5219

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