PDMLdr.cpp@ 12463

Last change on this file since 12463 was 11889, checked in by vboxsync, 16 years ago
VMM/SUP: Added SUPR3HardenedVerifyFile and use it to verify files we load.
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File size: 37.5 KB

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1	/* $Id: PDMLdr.cpp 11889 2008-08-31 18:08:32Z vboxsync $ */
2	/** @file
3	* PDM - Pluggable Device Manager, module loader.
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	//#define PDMLDR_FAKE_MODE
23
24	/*******************************************************************************
25	* Header Files *
26	*******************************************************************************/
27	#define LOG_GROUP LOG_GROUP_PDM_LDR
28	#include "PDMInternal.h"
29	#include <VBox/pdm.h>
30	#include <VBox/mm.h>
31	#include <VBox/vmm.h>
32	#include <VBox/vm.h>
33	#include <VBox/uvm.h>
34	#include <VBox/sup.h>
35	#include <VBox/param.h>
36	#include <VBox/err.h>
37	#include <VBox/hwaccm.h>
38
39	#include <VBox/log.h>
40	#include <iprt/assert.h>
41	#include <iprt/alloc.h>
42	#include <iprt/ldr.h>
43	#include <iprt/path.h>
44	#include <iprt/string.h>
45
46	#include <limits.h>
47
48
49	/*******************************************************************************
50	* Structures and Typedefs *
51	*******************************************************************************/
52	/**
53	* Structure which the user argument of the RTLdrGetBits() callback points to.
54	* @internal
55	*/
56	typedef struct PDMGETIMPORTARGS
57	{
58	PVM pVM;
59	PPDMMOD pModule;
60	} PDMGETIMPORTARGS, *PPDMGETIMPORTARGS;
61
62
63	/*******************************************************************************
64	* Internal Functions *
65	*******************************************************************************/
66	static DECLCALLBACK(int) pdmR3GetImportGC(RTLDRMOD hLdrMod, const char pszModule, const char pszSymbol, unsigned uSymbol, RTUINTPTR pValue, void pvUser);
67	static int pdmR3LoadR0U(PUVM pUVM, const char pszFilename, const char pszName);
68	static char * pdmR3FileGC(const char *pszFile);
69	static char * pdmR3FileR0(const char *pszFile);
70	static char * pdmR3File(const char pszFile, const char pszDefaultExt, bool fShared);
71	static DECLCALLBACK(int) pdmR3QueryModFromEIPEnumSymbols(RTLDRMOD hLdrMod, const char pszSymbol, unsigned uSymbol, RTUINTPTR Value, void pvUser);
72
73
74
75	/**
76	* Loads the VMMR0.r0 module early in the init process.
77	*
78	* @returns VBox status code.
79	* @param pUVM Pointer to the user mode VM structure.
80	*/
81	PDMR3DECL(int) PDMR3LdrLoadVMMR0U(PUVM pUVM)
82	{
83	return pdmR3LoadR0U(pUVM, NULL, VMMR0_MAIN_MODULE_NAME);
84	}
85
86
87	/**
88	* Init the module loader part of PDM.
89	*
90	* This routine will load the Host Context Ring-0 and Guest
91	* Context VMM modules.
92	*
93	* @returns VBox stutus code.
94	* @param pUVM Pointer to the user mode VM structure.
95	* @param pvVMMR0Mod The opqaue returned by PDMR3LdrLoadVMMR0.
96	*/
97	int pdmR3LdrInitU(PUVM pUVM)
98	{
99	#ifdef PDMLDR_FAKE_MODE
100	return VINF_SUCCESS;
101
102	#else
103
104	/*
105	* Load the mandatory GC module, the VMMR0.r0 is loaded before VM creation.
106	*/
107	return PDMR3LoadGC(pUVM->pVM, NULL, VMMGC_MAIN_MODULE_NAME);
108	#endif
109	}
110
111
112	/**
113	* Terminate the module loader part of PDM.
114	*
115	* This will unload and free all modules.
116	*
117	* @param pVM The VM handle.
118	*
119	* @remarks This is normally called twice during termination.
120	*/
121	void pdmR3LdrTermU(PUVM pUVM)
122	{
123	/*
124	* Free the modules.
125	*/
126	PPDMMOD pModule = pUVM->pdm.s.pModules;
127	pUVM->pdm.s.pModules = NULL;
128	while (pModule)
129	{
130	/* free loader item. */
131	if (pModule->hLdrMod != NIL_RTLDRMOD)
132	{
133	int rc2 = RTLdrClose(pModule->hLdrMod);
134	AssertRC(rc2);
135	pModule->hLdrMod = NIL_RTLDRMOD;
136	}
137
138	/* free bits. */
139	switch (pModule->eType)
140	{
141	case PDMMOD_TYPE_R0:
142	{
143	Assert(pModule->ImageBase);
144	int rc2 = SUPFreeModule((void *)(uintptr_t)pModule->ImageBase);
145	AssertRC(rc2);
146	pModule->ImageBase = 0;
147	break;
148	}
149
150	case PDMMOD_TYPE_GC:
151	case PDMMOD_TYPE_R3:
152	/* MM will free this memory for us - it's alloc only memory. :-) */
153	break;
154
155	default:
156	AssertMsgFailed(("eType=%d\n", pModule->eType));
157	break;
158	}
159	pModule->pvBits = NULL;
160
161	void *pvFree = pModule;
162	pModule = pModule->pNext;
163	RTMemFree(pvFree);
164	}
165	}
166
167
168	/**
169	* Applies relocations to GC modules.
170	*
171	* This must be done very early in the relocation
172	* process so that components can resolve GC symbols during relocation.
173	*
174	* @param pUVM Pointer to the user mode VM structure.
175	* @param offDelta Relocation delta relative to old location.
176	*/
177	PDMR3DECL(void) PDMR3LdrRelocateU(PUVM pUVM, RTGCINTPTR offDelta)
178	{
179	LogFlow(("PDMR3LdrRelocate: offDelta=%VGv\n", offDelta));
180
181	/*
182	* GC Modules.
183	*/
184	if (pUVM->pdm.s.pModules)
185	{
186	/*
187	* The relocation have to be done in two passes so imports
188	* can be correctely resolved. The first pass will update
189	* the ImageBase saving the current value in OldImageBase.
190	* The second pass will do the actual relocation.
191	*/
192	/* pass 1 */
193	PPDMMOD pCur;
194	for (pCur = pUVM->pdm.s.pModules; pCur; pCur = pCur->pNext)
195	{
196	if (pCur->eType == PDMMOD_TYPE_GC)
197	{
198	pCur->OldImageBase = pCur->ImageBase;
199	pCur->ImageBase = MMHyperHC2GC(pUVM->pVM, pCur->pvBits);
200	}
201	}
202
203	/* pass 2 */
204	for (pCur = pUVM->pdm.s.pModules; pCur; pCur = pCur->pNext)
205	{
206	if (pCur->eType == PDMMOD_TYPE_GC)
207	{
208	PDMGETIMPORTARGS Args;
209	Args.pVM = pUVM->pVM;
210	Args.pModule = pCur;
211	int rc = RTLdrRelocate(pCur->hLdrMod, pCur->pvBits, pCur->ImageBase, pCur->OldImageBase,
212	pdmR3GetImportGC, &Args);
213	AssertFatalMsgRC(rc, ("RTLdrRelocate failed, rc=%d\n", rc));
214	DBGFR3ModuleRelocate(pUVM->pVM, pCur->OldImageBase, pCur->ImageBase, RTLdrSize(pCur->hLdrMod),
215	pCur->szFilename, pCur->szName);
216	}
217	}
218	}
219	}
220
221
222	/**
223	* Loads a module into the host context ring-3.
224	*
225	* This is used by the driver and device init functions to load modules
226	* containing the drivers and devices. The function can be extended to
227	* load modules which are not native to the environment we're running in,
228	* but at the moment this is not required.
229	*
230	* No reference counting is kept, since we don't implement any facilities
231	* for unloading the module. But the module will naturally be released
232	* when the VM terminates.
233	*
234	* @returns VBox status code.
235	* @param pUVM Pointer to the user mode VM structure.
236	* @param pszFilename Filename of the module binary.
237	* @param pszName Module name. Case sensitive and the length is limited!
238	*/
239	int pdmR3LoadR3U(PUVM pUVM, const char pszFilename, const char pszName)
240	{
241	/*
242	* Validate input.
243	*/
244	AssertMsg(pUVM->pVM->pdm.s.offVM, ("bad init order!\n"));
245	Assert(pszFilename);
246	size_t cchFilename = strlen(pszFilename);
247	Assert(pszName);
248	size_t cchName = strlen(pszName);
249	PPDMMOD pCur;
250	if (cchName >= sizeof(pCur->szName))
251	{
252	AssertMsgFailed(("Name is too long, cchName=%d pszName='%s'\n", cchName, pszName));
253	return VERR_INVALID_PARAMETER;
254	}
255
256	/*
257	* Try lookup the name and see if the module exists.
258	*/
259	for (pCur = pUVM->pdm.s.pModules; pCur; pCur = pCur->pNext)
260	{
261	if (!strcmp(pCur->szName, pszName))
262	{
263	if (pCur->eType == PDMMOD_TYPE_R3)
264	return VINF_PDM_ALREADY_LOADED;
265	AssertMsgFailed(("We've already got a module '%s' loaded!\n", pszName));
266	return VERR_PDM_MODULE_NAME_CLASH;
267	}
268	}
269
270	/*
271	* Allocate the module list node and initialize it.
272	*/
273	const char *pszSuff = RTLdrGetSuff();
274	size_t cchSuff = strlen(pszSuff);
275	PPDMMOD pModule = (PPDMMOD)RTMemAllocZ(sizeof(*pModule) + cchFilename + cchSuff);
276	if (!pModule)
277	return VERR_NO_MEMORY;
278
279	pModule->eType = PDMMOD_TYPE_R3;
280	memcpy(pModule->szName, pszName, cchName); /* memory is zero'ed, no need to copy terminator :-) */
281	memcpy(pModule->szFilename, pszFilename, cchFilename);
282	memcpy(&pModule->szFilename[cchFilename], pszSuff, cchSuff);
283
284	/*
285	* Load the loader item.
286	*/
287	int rc = SUPR3HardenedVerifyFile(pModule->szFilename, "pdmR3LoadR3U", NULL);
288	if (RT_SUCCESS(rc))
289	rc = RTLdrLoad(pModule->szFilename, &pModule->hLdrMod);
290	if (VBOX_SUCCESS(rc))
291	{
292	pModule->pNext = pUVM->pdm.s.pModules;
293	pUVM->pdm.s.pModules = pModule;
294	return rc;
295	}
296
297	/* Something went wrong, most likely module not found. Don't consider other unlikely errors */
298	RTMemFree(pModule);
299	return VMSetError(pUVM->pVM, rc, RT_SRC_POS, N_("Unable to load R3 module %s"), pszFilename);
300	}
301
302
303	/**
304	* Resolve an external symbol during RTLdrGetBits() of a GC module.
305	*
306	* @returns VBox status code.
307	* @param hLdrMod The loader module handle.
308	* @param pszModule Module name.
309	* @param pszSymbol Symbol name, NULL if uSymbol should be used.
310	* @param uSymbol Symbol ordinal, ~0 if pszSymbol should be used.
311	* @param pValue Where to store the symbol value (address).
312	* @param pvUser User argument.
313	*/
314	static DECLCALLBACK(int) pdmR3GetImportGC(RTLDRMOD hLdrMod, const char pszModule, const char pszSymbol, unsigned uSymbol, RTUINTPTR pValue, void pvUser)
315	{
316	PVM pVM = ((PPDMGETIMPORTARGS)pvUser)->pVM;
317	PPDMMOD pModule = ((PPDMGETIMPORTARGS)pvUser)->pModule;
318
319	/*
320	* Adjust input.
321	*/
322	if (pszModule && !*pszModule)
323	pszModule = NULL;
324
325	/*
326	* Builtin module.
327	*/
328	if (!pszModule \|\| !strcmp(pszModule, "VMMGCBuiltin.gc"))
329	{
330	int rc = VINF_SUCCESS;
331	if (!strcmp(pszSymbol, "g_VM"))
332	*pValue = pVM->pVMGC;
333	else if (!strcmp(pszSymbol, "g_CPUM"))
334	*pValue = VM_GUEST_ADDR(pVM, &pVM->cpum);
335	else if (!strcmp(pszSymbol, "g_TRPM"))
336	*pValue = VM_GUEST_ADDR(pVM, &pVM->trpm);
337	else if ( !strncmp(pszSymbol, "VMM", 3)
338	\|\| !strcmp(pszSymbol, "g_Logger")
339	\|\| !strcmp(pszSymbol, "g_RelLogger"))
340	{
341	RTGCPTR GCPtr = 0;
342	rc = VMMR3GetImportGC(pVM, pszSymbol, &GCPtr);
343	if (VBOX_SUCCESS(rc))
344	*pValue = GCPtr;
345	}
346	else if ( !strncmp(pszSymbol, "TM", 2)
347	\|\| !strcmp(pszSymbol, "g_pSUPGlobalInfoPage"))
348	{
349	RTGCPTR GCPtr = 0;
350	rc = TMR3GetImportGC(pVM, pszSymbol, &GCPtr);
351	if (VBOX_SUCCESS(rc))
352	*pValue = GCPtr;
353	}
354	else
355	{
356	AssertMsg(!pszModule, ("Unknown builtin symbol '%s' for module '%s'!\n", pszSymbol, pModule->szName)); NOREF(pModule);
357	rc = VERR_SYMBOL_NOT_FOUND;
358	}
359	if (VBOX_SUCCESS(rc) \|\| pszModule)
360	return rc;
361	}
362
363	/*
364	* Search for module.
365	*/
366	PPDMMOD pCur = pVM->pUVM->pdm.s.pModules;
367	while (pCur)
368	{
369	if ( pCur->eType == PDMMOD_TYPE_GC
370	&& ( !pszModule
371	\|\| !strcmp(pCur->szName, pszModule))
372	)
373	{
374	/* Search for the symbol. */
375	int rc = RTLdrGetSymbolEx(pCur->hLdrMod, pCur->pvBits, pCur->ImageBase, pszSymbol, pValue);
376	if (VBOX_SUCCESS(rc))
377	{
378	AssertMsg(*pValue - pCur->ImageBase < RTLdrSize(pCur->hLdrMod),
379	("%VGv-%VGv %s %VGv\n", (RTGCPTR)pCur->ImageBase,
380	(RTGCPTR)(pCur->ImageBase + RTLdrSize(pCur->hLdrMod) - 1),
381	pszSymbol, (RTGCPTR)*pValue));
382	return rc;
383	}
384	if (pszModule)
385	{
386	AssertMsgFailed(("Couldn't find symbol '%s' in module '%s'!\n", pszSymbol, pszModule));
387	LogRel(("PDMLdr: Couldn't find symbol '%s' in module '%s'!\n", pszSymbol, pszModule));
388	return VERR_SYMBOL_NOT_FOUND;
389	}
390	}
391
392	/* next */
393	pCur = pCur->pNext;
394	}
395
396	AssertMsgFailed(("Couldn't find module '%s' for resolving symbol '%s'!\n", pszModule, pszSymbol));
397	return VERR_SYMBOL_NOT_FOUND;
398	}
399
400
401	/**
402	* Loads a module into the guest context (i.e. into the Hypervisor memory region).
403	*
404	* The external (to PDM) use of this interface is to load VMMGC.gc.
405	*
406	* @returns VBox status code.
407	* @param pVM The VM to load it into.
408	* @param pszFilename Filename of the module binary.
409	* @param pszName Module name. Case sensitive and the length is limited!
410	*/
411	PDMR3DECL(int) PDMR3LoadGC(PVM pVM, const char pszFilename, const char pszName)
412	{
413	/*
414	* Validate input.
415	*/
416	AssertMsg(pVM->pdm.s.offVM, ("bad init order!\n"));
417	PPDMMOD pCur = pVM->pUVM->pdm.s.pModules;
418	while (pCur)
419	{
420	if (!strcmp(pCur->szName, pszName))
421	{
422	AssertMsgFailed(("We've already got a module '%s' loaded!\n", pszName));
423	return VERR_PDM_MODULE_NAME_CLASH;
424	}
425	/* next */
426	pCur = pCur->pNext;
427	}
428
429	/*
430	* Find the file if not specified.
431	*/
432	char *pszFile = NULL;
433	if (!pszFilename)
434	pszFilename = pszFile = pdmR3FileGC(pszName);
435
436	/*
437	* Allocate the module list node.
438	*/
439	PPDMMOD pModule = (PPDMMOD)RTMemAllocZ(sizeof(*pModule) + strlen(pszFilename));
440	if (!pModule)
441	{
442	RTMemTmpFree(pszFile);
443	return VERR_NO_MEMORY;
444	}
445	AssertMsg(strlen(pszName) + 1 < sizeof(pModule->szName),
446	("pazName is too long (%d chars) max is %d chars.\n", strlen(pszName), sizeof(pModule->szName) - 1));
447	strcpy(pModule->szName, pszName);
448	pModule->eType = PDMMOD_TYPE_GC;
449	strcpy(pModule->szFilename, pszFilename);
450
451
452	/*
453	* Open the loader item.
454	*/
455	int rc = SUPR3HardenedVerifyFile(pszFilename, "PDMR3LoadGC", NULL);
456	if (RT_SUCCESS(rc))
457	rc = RTLdrOpen(pszFilename, &pModule->hLdrMod);
458	if (VBOX_SUCCESS(rc))
459	{
460	/*
461	* Allocate space in the hypervisor.
462	*/
463	size_t cb = RTLdrSize(pModule->hLdrMod);
464	cb = RT_ALIGN_Z(cb, PAGE_SIZE);
465	rc = SUPPageAlloc(cb >> PAGE_SHIFT, &pModule->pvBits);
466	if (VBOX_SUCCESS(rc))
467	{
468	RTGCPTR GCPtr;
469	rc = MMR3HyperMapHCRam(pVM, pModule->pvBits, cb, true, pModule->szName, &GCPtr);
470	if (VBOX_SUCCESS(rc))
471	{
472	MMR3HyperReserve(pVM, PAGE_SIZE, "fence", NULL);
473
474	/*
475	* Get relocated image bits.
476	*/
477	Assert(MMHyperHC2GC(pVM, pModule->pvBits) == GCPtr);
478	pModule->ImageBase = GCPtr;
479	PDMGETIMPORTARGS Args;
480	Args.pVM = pVM;
481	Args.pModule = pModule;
482	rc = RTLdrGetBits(pModule->hLdrMod, pModule->pvBits, pModule->ImageBase, pdmR3GetImportGC, &Args);
483	if (VBOX_SUCCESS(rc))
484	{
485	/*
486	* Insert the module.
487	*/
488	PUVM pUVM = pVM->pUVM;
489	if (pUVM->pdm.s.pModules)
490	{
491	/* we don't expect this list to be very long, so rather save the tail pointer. */
492	PPDMMOD pCur = pUVM->pdm.s.pModules;
493	while (pCur->pNext)
494	pCur = pCur->pNext;
495	pCur->pNext = pModule;
496	}
497	else
498	pUVM->pdm.s.pModules = pModule; /* (pNext is zeroed by alloc) */
499	Log(("PDM: GC Module at %VGvx %s (%s)\n", (RTGCPTR)pModule->ImageBase, pszName, pszFilename));
500	RTMemTmpFree(pszFile);
501	return VINF_SUCCESS;
502	}
503	}
504	else
505	{
506	AssertRC(rc);
507	SUPPageFree(pModule->pvBits, cb >> PAGE_SHIFT);
508	}
509	}
510	else
511	AssertMsgFailed(("SUPPageAlloc(%d,) -> %Vrc\n", cb >> PAGE_SHIFT, rc));
512	int rc2 = RTLdrClose(pModule->hLdrMod);
513	AssertRC(rc2);
514	}
515	RTMemFree(pModule);
516	RTMemTmpFree(pszFile);
517
518	/* Don't consider VERR_PDM_MODULE_NAME_CLASH and VERR_NO_MEMORY above as these are very unlikely. */
519	if (VBOX_FAILURE(rc))
520	return VMSetError(pVM, rc, RT_SRC_POS, N_("Cannot load GC module %s"), pszFilename);
521	return rc;
522	}
523
524
525	/**
526	* Loads a module into the ring-0 context.
527	*
528	* @returns VBox status code.
529	* @param pUVM Pointer to the user mode VM structure.
530	* @param pszFilename Filename of the module binary.
531	* @param pszName Module name. Case sensitive and the length is limited!
532	*/
533	static int pdmR3LoadR0U(PUVM pUVM, const char pszFilename, const char pszName)
534	{
535	/*
536	* Validate input.
537	*/
538	PPDMMOD pCur = pUVM->pdm.s.pModules;
539	while (pCur)
540	{
541	if (!strcmp(pCur->szName, pszName))
542	{
543	AssertMsgFailed(("We've already got a module '%s' loaded!\n", pszName));
544	return VERR_PDM_MODULE_NAME_CLASH;
545	}
546	/* next */
547	pCur = pCur->pNext;
548	}
549
550	/*
551	* Find the file if not specified.
552	*/
553	char *pszFile = NULL;
554	if (!pszFilename)
555	pszFilename = pszFile = pdmR3FileR0(pszName);
556
557	/*
558	* Allocate the module list node.
559	*/
560	PPDMMOD pModule = (PPDMMOD)RTMemAllocZ(sizeof(*pModule) + strlen(pszFilename));
561	if (!pModule)
562	{
563	RTMemTmpFree(pszFile);
564	return VERR_NO_MEMORY;
565	}
566	AssertMsg(strlen(pszName) + 1 < sizeof(pModule->szName),
567	("pazName is too long (%d chars) max is %d chars.\n", strlen(pszName), sizeof(pModule->szName) - 1));
568	strcpy(pModule->szName, pszName);
569	pModule->eType = PDMMOD_TYPE_R0;
570	strcpy(pModule->szFilename, pszFilename);
571
572	/*
573	* Ask the support library to load it.
574	*/
575	void *pvImageBase;
576	int rc = SUPLoadModule(pszFilename, pszName, &pvImageBase);
577	if (VBOX_SUCCESS(rc))
578	{
579	pModule->hLdrMod = NIL_RTLDRMOD;
580	pModule->ImageBase = (uintptr_t)pvImageBase;
581
582	/*
583	* Insert the module.
584	*/
585	if (pUVM->pdm.s.pModules)
586	{
587	/* we don't expect this list to be very long, so rather save the tail pointer. */
588	PPDMMOD pCur = pUVM->pdm.s.pModules;
589	while (pCur->pNext)
590	pCur = pCur->pNext;
591	pCur->pNext = pModule;
592	}
593	else
594	pUVM->pdm.s.pModules = pModule; /* (pNext is zeroed by alloc) */
595	Log(("PDM: GC Module at %VGvx %s (%s)\n", (RTGCPTR)pModule->ImageBase, pszName, pszFilename));
596	RTMemTmpFree(pszFile);
597	return VINF_SUCCESS;
598	}
599
600	RTMemFree(pModule);
601	RTMemTmpFree(pszFile);
602	LogRel(("pdmR3LoadR0U: pszName=\"%s\" rc=%Vrc\n", pszName, rc));
603
604	/* Don't consider VERR_PDM_MODULE_NAME_CLASH and VERR_NO_MEMORY above as these are very unlikely. */
605	if (VBOX_FAILURE(rc) && pUVM->pVM) /** @todo VMR3SetErrorU. */
606	return VMSetError(pUVM->pVM, rc, RT_SRC_POS, N_("Cannot load R0 module %s"), pszFilename);
607	return rc;
608	}
609
610
611
612	/**
613	* Get the address of a symbol in a given HC ring 3 module.
614	*
615	* @returns VBox status code.
616	* @param pVM VM handle.
617	* @param pszModule Module name.
618	* @param pszSymbol Symbol name. If it's value is less than 64k it's treated like a
619	* ordinal value rather than a string pointer.
620	* @param ppvValue Where to store the symbol value.
621	*/
622	PDMR3DECL(int) PDMR3GetSymbolR3(PVM pVM, const char pszModule, const char pszSymbol, void **ppvValue)
623	{
624	/*
625	* Validate input.
626	*/
627	AssertMsg(pVM->pdm.s.offVM, ("bad init order!\n"));
628
629	/*
630	* Find the module.
631	*/
632	for (PPDMMOD pModule = pVM->pUVM->pdm.s.pModules; pModule; pModule = pModule->pNext)
633	{
634	if ( pModule->eType == PDMMOD_TYPE_R3
635	&& !strcmp(pModule->szName, pszModule))
636	{
637	RTUINTPTR Value = 0;
638	int rc = RTLdrGetSymbolEx(pModule->hLdrMod, pModule->pvBits, pModule->ImageBase, pszSymbol, &Value);
639	if (VBOX_SUCCESS(rc))
640	{
641	ppvValue = (void )(uintptr_t)Value;
642	Assert((uintptr_t)*ppvValue == Value);
643	}
644	else
645	{
646	if (pszSymbol < (const char)(void)0x10000)
647	AssertMsg(rc, ("Couldn't symbol '%u' in module '%s'\n", (unsigned)(uintptr_t)pszSymbol, pszModule));
648	else
649	AssertMsg(rc, ("Couldn't symbol '%s' in module '%s'\n", pszSymbol, pszModule));
650	}
651	return rc;
652	}
653	}
654
655	AssertMsgFailed(("Couldn't locate module '%s'\n", pszModule));
656	return VERR_SYMBOL_NOT_FOUND;
657	}
658
659
660	/**
661	* Get the address of a symbol in a given HC ring 0 module.
662	*
663	* @returns VBox status code.
664	* @param pVM VM handle.
665	* @param pszModule Module name. If NULL the main R0 module (VMMR0.r0) is assumes.
666	* @param pszSymbol Symbol name. If it's value is less than 64k it's treated like a
667	* ordinal value rather than a string pointer.
668	* @param ppvValue Where to store the symbol value.
669	*/
670	PDMR3DECL(int) PDMR3GetSymbolR0(PVM pVM, const char pszModule, const char pszSymbol, PRTR0PTR ppvValue)
671	{
672	#ifdef PDMLDR_FAKE_MODE
673	*ppvValue = 0xdeadbeef;
674	return VINF_SUCCESS;
675
676	#else
677	/*
678	* Validate input.
679	*/
680	AssertMsg(pVM->pdm.s.offVM, ("bad init order!\n"));
681	if (!pszModule)
682	pszModule = "VMMR0.r0";
683
684	/*
685	* Find the module.
686	*/
687	for (PPDMMOD pModule = pVM->pUVM->pdm.s.pModules; pModule; pModule = pModule->pNext)
688	{
689	if ( pModule->eType == PDMMOD_TYPE_R0
690	&& !strcmp(pModule->szName, pszModule))
691	{
692	int rc = SUPGetSymbolR0((void )(uintptr_t)pModule->ImageBase, pszSymbol, (void *)ppvValue);
693	if (VBOX_FAILURE(rc))
694	{
695	AssertMsgRC(rc, ("Couldn't find symbol '%s' in module '%s'\n", pszSymbol, pszModule));
696	LogRel(("PDMGetSymbol: Couldn't find symbol '%s' in module '%s'\n", pszSymbol, pszModule));
697	}
698	return rc;
699	}
700	}
701
702	AssertMsgFailed(("Couldn't locate module '%s'\n", pszModule));
703	return VERR_SYMBOL_NOT_FOUND;
704	#endif
705	}
706
707
708	/**
709	* Same as PDMR3GetSymbolR0 except that the module will be attempted loaded if not found.
710	*
711	* @returns VBox status code.
712	* @param pVM VM handle.
713	* @param pszModule Module name. If NULL the main R0 module (VMMR0.r0) is assumed.
714	* @param pszSymbol Symbol name. If it's value is less than 64k it's treated like a
715	* ordinal value rather than a string pointer.
716	* @param ppvValue Where to store the symbol value.
717	*/
718	PDMR3DECL(int) PDMR3GetSymbolR0Lazy(PVM pVM, const char pszModule, const char pszSymbol, PRTR0PTR ppvValue)
719	{
720	#ifdef PDMLDR_FAKE_MODE
721	*ppvValue = 0xdeadbeef;
722	return VINF_SUCCESS;
723
724	#else
725	/*
726	* Since we're lazy, we'll only check if the module is present
727	* and hand it over to PDMR3GetSymbolR0 when that's done.
728	*/
729	AssertMsg(pVM->pdm.s.offVM, ("bad init order!\n"));
730	if (pszModule)
731	{
732	AssertMsgReturn(!strpbrk(pszModule, "/\\:\n\r\t"), ("pszModule=%s\n", pszModule), VERR_INVALID_PARAMETER);
733	PPDMMOD pModule;
734	for (pModule = pVM->pUVM->pdm.s.pModules; pModule; pModule = pModule->pNext)
735	if ( pModule->eType == PDMMOD_TYPE_R0
736	&& !strcmp(pModule->szName, pszModule))
737	break;
738	if (!pModule)
739	{
740	int rc = pdmR3LoadR0U(pVM->pUVM, NULL, pszModule);
741	AssertMsgRCReturn(rc, ("pszModule=%s rc=%Vrc\n", pszModule, rc), VERR_MODULE_NOT_FOUND);
742	}
743	}
744	return PDMR3GetSymbolR0(pVM, pszModule, pszSymbol, ppvValue);
745	#endif
746	}
747
748
749	/**
750	* Get the address of a symbol in a given GC module.
751	*
752	* @returns VBox status code.
753	* @param pVM VM handle.
754	* @param pszModule Module name. If NULL the main R0 module (VMMGC.gc) is assumes.
755	* @param pszSymbol Symbol name. If it's value is less than 64k it's treated like a
756	* ordinal value rather than a string pointer.
757	* @param pGCPtrValue Where to store the symbol value.
758	*/
759	PDMR3DECL(int) PDMR3GetSymbolGC(PVM pVM, const char pszModule, const char pszSymbol, PRTGCPTR32 pGCPtrValue)
760	{
761	#ifdef PDMLDR_FAKE_MODE
762	*pGCPtrValue = 0xfeedf00d;
763	return VINF_SUCCESS;
764
765	#else
766	/*
767	* Validate input.
768	*/
769	AssertMsg(pVM->pdm.s.offVM, ("bad init order!\n"));
770	if (!pszModule)
771	pszModule = "VMMGC.gc";
772
773	/*
774	* Find the module.
775	*/
776	for (PPDMMOD pModule = pVM->pUVM->pdm.s.pModules; pModule; pModule = pModule->pNext)
777	{
778	if ( pModule->eType == PDMMOD_TYPE_GC
779	&& !strcmp(pModule->szName, pszModule))
780	{
781	RTUINTPTR Value;
782	int rc = RTLdrGetSymbolEx(pModule->hLdrMod, pModule->pvBits, pModule->ImageBase, pszSymbol, &Value);
783	if (VBOX_SUCCESS(rc))
784	{
785	*pGCPtrValue = (RTGCPTR)Value;
786	Assert(*pGCPtrValue == Value);
787	}
788	else
789	{
790	if (pszSymbol < (const char)(void)0x10000)
791	AssertMsg(rc, ("Couldn't symbol '%u' in module '%s'\n", (unsigned)(uintptr_t)pszSymbol, pszModule));
792	else
793	AssertMsg(rc, ("Couldn't symbol '%s' in module '%s'\n", pszSymbol, pszModule));
794	}
795	return rc;
796	}
797	}
798
799	AssertMsgFailed(("Couldn't locate module '%s'\n", pszModule));
800	return VERR_SYMBOL_NOT_FOUND;
801	#endif
802	}
803
804
805	/**
806	* Same as PDMR3GetSymbolGC except that the module will be attempted loaded if not found.
807	*
808	* @returns VBox status code.
809	* @param pVM VM handle.
810	* @param pszModule Module name. If NULL the main R0 module (VMMGC.gc) is assumes.
811	* @param pszSymbol Symbol name. If it's value is less than 64k it's treated like a
812	* ordinal value rather than a string pointer.
813	* @param pGCPtrValue Where to store the symbol value.
814	*/
815	PDMR3DECL(int) PDMR3GetSymbolGCLazy(PVM pVM, const char pszModule, const char pszSymbol, PRTGCPTR32 pGCPtrValue)
816	{
817	#ifdef PDMLDR_FAKE_MODE
818	*pGCPtrValue = 0xfeedf00d;
819	return VINF_SUCCESS;
820
821	#else
822	/*
823	* Since we're lazy, we'll only check if the module is present
824	* and hand it over to PDMR3GetSymbolGC when that's done.
825	*/
826	AssertMsg(pVM->pdm.s.offVM, ("bad init order!\n"));
827	if (pszModule)
828	{
829	AssertMsgReturn(!strpbrk(pszModule, "/\\:\n\r\t"), ("pszModule=%s\n", pszModule), VERR_INVALID_PARAMETER);
830	PPDMMOD pModule;
831	for (pModule = pVM->pUVM->pdm.s.pModules; pModule; pModule = pModule->pNext)
832	if ( pModule->eType == PDMMOD_TYPE_GC
833	&& !strcmp(pModule->szName, pszModule))
834	break;
835	if (!pModule)
836	{
837	char *pszFilename = pdmR3FileGC(pszModule);
838	AssertMsgReturn(pszFilename, ("pszModule=%s\n", pszModule), VERR_MODULE_NOT_FOUND);
839	int rc = PDMR3LoadGC(pVM, pszFilename, pszModule);
840	RTMemTmpFree(pszFilename);
841	AssertMsgRCReturn(rc, ("pszModule=%s rc=%Vrc\n", pszModule, rc), VERR_MODULE_NOT_FOUND);
842	}
843	}
844	return PDMR3GetSymbolGC(pVM, pszModule, pszSymbol, pGCPtrValue);
845	#endif
846	}
847
848
849	/**
850	* Constructs the full filename for a R3 image file.
851	*
852	* @returns Pointer to temporary memory containing the filename.
853	* Caller must free this using RTMemTmpFree().
854	* @returns NULL on failure.
855	* @param pszFile File name (no path).
856	* @todo We'll have this elsewhere than in the root later!
857	*/
858	char pdmR3FileR3(const char pszFile, bool fShared)
859	{
860	return pdmR3File(pszFile, NULL, fShared);
861	}
862
863
864	/**
865	* Constructs the full filename for a R0 image file.
866	*
867	* @returns Pointer to temporary memory containing the filename.
868	* Caller must free this using RTMemTmpFree().
869	* @returns NULL on failure.
870	* @param pszFile File name (no path).
871	* @todo We'll have this elsewhere than in the root later!
872	*/
873	char * pdmR3FileR0(const char *pszFile)
874	{
875	return pdmR3File(pszFile, NULL, /fShared=/false);
876	}
877
878
879	/**
880	* Constructs the full filename for a GC image file.
881	*
882	* @returns Pointer to temporary memory containing the filename.
883	* Caller must free this using RTMemTmpFree().
884	* @returns NULL on failure.
885	* @param pszFile File name (no path).
886	* @todo We'll have this elsewhere than in the root later!
887	*/
888	char * pdmR3FileGC(const char *pszFile)
889	{
890	return pdmR3File(pszFile, NULL, /fShared=/false);
891	}
892
893
894	/**
895	* Worker for pdmR3File().
896	*
897	* @returns Pointer to temporary memory containing the filename.
898	* Caller must free this using RTMemTmpFree().
899	* @returns NULL on failure.
900	* @param pszDir Directory part
901	* @param pszFile File name part
902	* @param pszDefaultExt Extension part
903	*/
904	static char * pdmR3FileConstruct(const char pszDir, const char pszFile, const char *pszDefaultExt)
905	{
906	/*
907	* Allocate temp memory for return buffer.
908	*/
909	unsigned cchDir = strlen(pszDir);
910	unsigned cchFile = strlen(pszFile);
911	unsigned cchDefaultExt;
912
913	/*
914	* Default extention?
915	*/
916	if (!pszDefaultExt \|\| strchr(pszFile, '.'))
917	cchDefaultExt = 0;
918	else
919	cchDefaultExt = strlen(pszDefaultExt);
920
921	unsigned cchPath = cchDir + 1 + cchFile + cchDefaultExt + 1;
922	if (cchPath > RTPATH_MAX)
923	{
924	AssertMsgFailed(("Path too long!\n"));
925	return NULL;
926	}
927
928	char pszRet = (char )RTMemTmpAlloc(cchDir + 1 + cchFile + cchDefaultExt + 1);
929	if (!pszRet)
930	{
931	AssertMsgFailed(("Out of temporary memory!\n"));
932	return NULL;
933	}
934
935	/*
936	* Construct the filename.
937	*/
938	memcpy(pszRet, pszDir, cchDir);
939	pszRet[cchDir++] = '/'; /* this works everywhere */
940	memcpy(pszRet + cchDir, pszFile, cchFile + 1);
941	if (cchDefaultExt)
942	memcpy(pszRet + cchDir + cchFile, pszDefaultExt, cchDefaultExt + 1);
943
944	return pszRet;
945	}
946
947
948	/**
949	* Worker for pdmR3FileGC(), pdmR3FileR0() and pdmR3FileR3().
950	*
951	* @returns Pointer to temporary memory containing the filename.
952	* Caller must free this using RTMemTmpFree().
953	* @returns NULL on failure.
954	* @param pszFile File name (no path).
955	* @param pszDefaultExt The default extention, NULL if none.
956	* @param fShared If true, search in the shared directory (/usr/lib on Unix), else
957	* search in the private directory (/usr/lib/virtualbox on Unix).
958	* Ignored if VBOX_PATH_SHARED_LIBS is not defined.
959	* @todo We'll have this elsewhere than in the root later!
960	* @todo Remove the fShared hack again once we don't need to link against VBoxDD anymore!
961	*/
962	static char * pdmR3File(const char pszFile, const char pszDefaultExt, bool fShared)
963	{
964	char szPath[RTPATH_MAX];
965	int rc;
966
967	rc = fShared ? RTPathSharedLibs(szPath, sizeof(szPath))
968	: RTPathAppPrivateArch(szPath, sizeof(szPath));
969	if (!VBOX_SUCCESS(rc))
970	{
971	AssertMsgFailed(("RTPathProgram(,%d) failed rc=%d!\n", sizeof(szPath), rc));
972	return NULL;
973	}
974
975	return pdmR3FileConstruct(szPath, pszFile, pszDefaultExt);
976	}
977
978
979	/** @internal */
980	typedef struct QMFEIPARG
981	{
982	uint32_t uEIP;
983
984	char *pszNearSym1;
985	unsigned cchNearSym1;
986	RTINTPTR offNearSym1;
987
988	char *pszNearSym2;
989	unsigned cchNearSym2;
990	RTINTPTR offNearSym2;
991	} QMFEIPARG, *PQMFEIPARG;
992
993	/**
994	* Queries module information from an EIP.
995	*
996	* This is typically used to locate a crash address.
997	*
998	* @returns VBox status code.
999	* @param pVM VM handle
1000	* @param uEIP EIP to locate.
1001	* @param pszModName Where to store the module name.
1002	* @param cchModName Size of the module name buffer.
1003	* @param pMod Base address of the module.
1004	* @param pszNearSym1 Name of the closes symbol from below.
1005	* @param cchNearSym1 Size of the buffer pointed to by pszNearSym1.
1006	* @param pNearSym1 The address of pszNearSym1.
1007	* @param pszNearSym2 Name of the closes symbol from below.
1008	* @param cchNearSym2 Size of the buffer pointed to by pszNearSym2.
1009	* @param pNearSym2 The address of pszNearSym2.
1010	*/
1011	PDMR3DECL(int) PDMR3QueryModFromEIP(PVM pVM, uint32_t uEIP,
1012	char pszModName, unsigned cchModName, RTGCPTR pMod,
1013	char pszNearSym1, unsigned cchNearSym1, RTGCPTR pNearSym1,
1014	char pszNearSym2, unsigned cchNearSym2, RTGCPTR pNearSym2)
1015	{
1016	int rc = VERR_MODULE_NOT_FOUND;
1017	PPDMMOD pCur;
1018	for (pCur = pVM->pUVM->pdm.s.pModules; pCur; pCur = pCur->pNext)
1019	{
1020	/* Skip anything which isn't in GC. */
1021	if (pCur->eType != PDMMOD_TYPE_GC)
1022	continue;
1023	if ((RTUINTPTR)uEIP - pCur->ImageBase < RTLdrSize(pCur->hLdrMod))
1024	{
1025	if (pMod)
1026	*pMod = pCur->ImageBase;
1027	if (pszModName && cchModName)
1028	{
1029	*pszModName = '\0';
1030	strncat(pszModName, pCur->szName, cchModName);
1031	}
1032	if (pNearSym1) *pNearSym1 = 0;
1033	if (pNearSym2) *pNearSym2 = 0;
1034	if (pszNearSym1) *pszNearSym1 = '\0';
1035	if (pszNearSym2) *pszNearSym2 = '\0';
1036
1037	/*
1038	* Locate the nearest symbols.
1039	*/
1040	QMFEIPARG Args;
1041	Args.uEIP = uEIP;
1042	Args.pszNearSym1 = pszNearSym1;
1043	Args.cchNearSym1 = cchNearSym1;
1044	Args.offNearSym1 = INT_MIN; /** @todo fix INT_MIN/MAX! */
1045	Args.pszNearSym2 = pszNearSym2;
1046	Args.cchNearSym2 = cchNearSym2;
1047	Args.offNearSym2 = INT_MAX;
1048
1049	rc = RTLdrEnumSymbols(pCur->hLdrMod, RTLDR_ENUM_SYMBOL_FLAGS_ALL, pCur->pvBits, pCur->ImageBase,
1050	pdmR3QueryModFromEIPEnumSymbols, &Args);
1051	if (pNearSym1 && Args.offNearSym1 != INT_MIN)
1052	*pNearSym1 = Args.offNearSym1 + uEIP;
1053	if (pNearSym2 && Args.offNearSym2 != INT_MAX)
1054	*pNearSym2 = Args.offNearSym2 + uEIP;
1055
1056	rc = VINF_SUCCESS;
1057	if (pCur->eType == PDMMOD_TYPE_GC)
1058	break;
1059	}
1060
1061	}
1062	return rc;
1063	}
1064
1065
1066	/**
1067	* Enumeration callback function used by RTLdrEnumSymbols().
1068	*
1069	* @returns VBox status code. Failure will stop the enumeration.
1070	* @param hLdrMod The loader module handle.
1071	* @param pszSymbol Symbol name. NULL if ordinal only.
1072	* @param uSymbol Symbol ordinal, ~0 if not used.
1073	* @param Value Symbol value.
1074	* @param pvUser The user argument specified to RTLdrEnumSymbols().
1075	*/
1076	static DECLCALLBACK(int) pdmR3QueryModFromEIPEnumSymbols(RTLDRMOD hLdrMod, const char pszSymbol, unsigned uSymbol, RTUINTPTR Value, void pvUser)
1077	{
1078	PQMFEIPARG pArgs = (PQMFEIPARG)pvUser;
1079
1080	RTINTPTR off = Value - pArgs->uEIP;
1081	if (off <= 0) /* near1 is before or at same location. */
1082	{
1083	if (off > pArgs->offNearSym1)
1084	{
1085	pArgs->offNearSym1 = off;
1086	if (pArgs->pszNearSym1 && pArgs->cchNearSym1)
1087	{
1088	*pArgs->pszNearSym1 = '\0';
1089	if (pszSymbol)
1090	strncat(pArgs->pszNearSym1, pszSymbol, pArgs->cchNearSym1);
1091	else
1092	{
1093	char szOrd[32];
1094	RTStrPrintf(szOrd, sizeof(szOrd), "#%#x", uSymbol);
1095	strncat(pArgs->pszNearSym1, szOrd, pArgs->cchNearSym1);
1096	}
1097	}
1098	}
1099	}
1100	else /* near2 is after */
1101	{
1102	if (off < pArgs->offNearSym2)
1103	{
1104	pArgs->offNearSym2 = off;
1105	if (pArgs->pszNearSym2 && pArgs->cchNearSym2)
1106	{
1107	*pArgs->pszNearSym2 = '\0';
1108	if (pszSymbol)
1109	strncat(pArgs->pszNearSym2, pszSymbol, pArgs->cchNearSym2);
1110	else
1111	{
1112	char szOrd[32];
1113	RTStrPrintf(szOrd, sizeof(szOrd), "#%#x", uSymbol);
1114	strncat(pArgs->pszNearSym2, szOrd, pArgs->cchNearSym2);
1115	}
1116	}
1117	}
1118	}
1119
1120	return VINF_SUCCESS;
1121	}
1122
1123
1124	/**
1125	* Enumerate all PDM modules.
1126	*
1127	* @returns VBox status.
1128	* @param pVM VM Handle.
1129	* @param pfnCallback Function to call back for each of the modules.
1130	* @param pvArg User argument.
1131	*/
1132	PDMR3DECL(int) PDMR3EnumModules(PVM pVM, PFNPDMR3ENUM pfnCallback, void *pvArg)
1133	{
1134	PPDMMOD pCur;
1135	for (pCur = pVM->pUVM->pdm.s.pModules; pCur; pCur = pCur->pNext)
1136	{
1137	int rc = pfnCallback(pVM,
1138	pCur->szFilename,
1139	pCur->szName,
1140	pCur->ImageBase,
1141	pCur->eType == PDMMOD_TYPE_GC ? RTLdrSize(pCur->hLdrMod) : 0,
1142	pCur->eType == PDMMOD_TYPE_GC);
1143	if (VBOX_FAILURE(rc))
1144	return rc;
1145	}
1146	return VINF_SUCCESS;
1147	}
1148

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source: vbox/trunk/src/VBox/VMM/PDMLdr.cpp@ 12463

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