1 | /* $Id: DBGFMem.cpp 28800 2010-04-27 08:22:32Z vboxsync $ */
|
---|
2 | /** @file
|
---|
3 | * DBGF - Debugger Facility, Memory Methods.
|
---|
4 | */
|
---|
5 |
|
---|
6 | /*
|
---|
7 | * Copyright (C) 2007 Oracle Corporation
|
---|
8 | *
|
---|
9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
---|
10 | * available from http://www.virtualbox.org. This file is free software;
|
---|
11 | * you can redistribute it and/or modify it under the terms of the GNU
|
---|
12 | * General Public License (GPL) as published by the Free Software
|
---|
13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
---|
14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
---|
15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
---|
16 | */
|
---|
17 |
|
---|
18 |
|
---|
19 | /*******************************************************************************
|
---|
20 | * Header Files *
|
---|
21 | *******************************************************************************/
|
---|
22 | #define LOG_GROUP LOG_GROUP_DBGF
|
---|
23 | #include <VBox/dbgf.h>
|
---|
24 | #include <VBox/pgm.h>
|
---|
25 | #include <VBox/selm.h>
|
---|
26 | #include <VBox/hwaccm.h>
|
---|
27 | #include "DBGFInternal.h"
|
---|
28 | #include <VBox/vm.h>
|
---|
29 | #include <VBox/err.h>
|
---|
30 | #include <VBox/log.h>
|
---|
31 | #include <VBox/mm.h>
|
---|
32 |
|
---|
33 |
|
---|
34 |
|
---|
35 | /**
|
---|
36 | * Scan guest memory for an exact byte string.
|
---|
37 | *
|
---|
38 | * @returns VBox status code.
|
---|
39 | * @param pVM The VM handle.
|
---|
40 | * @param idCpu The ID of the CPU context to search in.
|
---|
41 | * @param pAddress Where to store the mixed address.
|
---|
42 | * @param puAlign The alignment restriction imposed on the search result.
|
---|
43 | * @param pcbRange The number of bytes to scan. Passed as a pointer because
|
---|
44 | * it may be 64-bit.
|
---|
45 | * @param pabNeedle What to search for - exact search.
|
---|
46 | * @param cbNeedle Size of the search byte string.
|
---|
47 | * @param pHitAddress Where to put the address of the first hit.
|
---|
48 | */
|
---|
49 | static DECLCALLBACK(int) dbgfR3MemScan(PVM pVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, PCRTGCUINTPTR pcbRange, RTGCUINTPTR *puAlign,
|
---|
50 | const uint8_t *pabNeedle, size_t cbNeedle, PDBGFADDRESS pHitAddress)
|
---|
51 | {
|
---|
52 | Assert(idCpu == VMMGetCpuId(pVM));
|
---|
53 |
|
---|
54 | /*
|
---|
55 | * Validate the input we use, PGM does the rest.
|
---|
56 | */
|
---|
57 | RTGCUINTPTR cbRange = *pcbRange;
|
---|
58 | if (!DBGFR3AddrIsValid(pVM, pAddress))
|
---|
59 | return VERR_INVALID_POINTER;
|
---|
60 | if (!VALID_PTR(pHitAddress))
|
---|
61 | return VERR_INVALID_POINTER;
|
---|
62 | if (DBGFADDRESS_IS_HMA(pAddress))
|
---|
63 | return VERR_INVALID_POINTER;
|
---|
64 |
|
---|
65 | /*
|
---|
66 | * Select DBGF worker by addressing mode.
|
---|
67 | */
|
---|
68 | int rc;
|
---|
69 | PVMCPU pVCpu = VMMGetCpuById(pVM, idCpu);
|
---|
70 | PGMMODE enmMode = PGMGetGuestMode(pVCpu);
|
---|
71 | if ( enmMode == PGMMODE_REAL
|
---|
72 | || enmMode == PGMMODE_PROTECTED
|
---|
73 | || DBGFADDRESS_IS_PHYS(pAddress)
|
---|
74 | )
|
---|
75 | {
|
---|
76 | RTGCPHYS GCPhysAlign = *puAlign;
|
---|
77 | if (GCPhysAlign != *puAlign)
|
---|
78 | return VERR_OUT_OF_RANGE;
|
---|
79 | RTGCPHYS PhysHit;
|
---|
80 | rc = PGMR3DbgScanPhysical(pVM, pAddress->FlatPtr, cbRange, GCPhysAlign, pabNeedle, cbNeedle, &PhysHit);
|
---|
81 | if (RT_SUCCESS(rc))
|
---|
82 | DBGFR3AddrFromPhys(pVM, pHitAddress, PhysHit);
|
---|
83 | }
|
---|
84 | else
|
---|
85 | {
|
---|
86 | #if GC_ARCH_BITS > 32
|
---|
87 | if ( ( pAddress->FlatPtr >= _4G
|
---|
88 | || pAddress->FlatPtr + cbRange > _4G)
|
---|
89 | && enmMode != PGMMODE_AMD64
|
---|
90 | && enmMode != PGMMODE_AMD64_NX)
|
---|
91 | return VERR_DBGF_MEM_NOT_FOUND;
|
---|
92 | #endif
|
---|
93 | RTGCUINTPTR GCPtrHit;
|
---|
94 | rc = PGMR3DbgScanVirtual(pVM, pVCpu, pAddress->FlatPtr, cbRange, *puAlign, pabNeedle, cbNeedle, &GCPtrHit);
|
---|
95 | if (RT_SUCCESS(rc))
|
---|
96 | DBGFR3AddrFromFlat(pVM, pHitAddress, GCPtrHit);
|
---|
97 | }
|
---|
98 |
|
---|
99 | return rc;
|
---|
100 | }
|
---|
101 |
|
---|
102 |
|
---|
103 | /**
|
---|
104 | * Scan guest memory for an exact byte string.
|
---|
105 | *
|
---|
106 | * @returns VBox status codes:
|
---|
107 | * @retval VINF_SUCCESS and *pGCPtrHit on success.
|
---|
108 | * @retval VERR_DBGF_MEM_NOT_FOUND if not found.
|
---|
109 | * @retval VERR_INVALID_POINTER if any of the pointer arguments are invalid.
|
---|
110 | * @retval VERR_INVALID_ARGUMENT if any other arguments are invalid.
|
---|
111 | *
|
---|
112 | * @param pVM The VM handle.
|
---|
113 | * @param idCpu The ID of the CPU context to search in.
|
---|
114 | * @param pAddress Where to store the mixed address.
|
---|
115 | * @param cbRange The number of bytes to scan.
|
---|
116 | * @param uAlign The alignment restriction imposed on the result.
|
---|
117 | * Usually set to 1.
|
---|
118 | * @param pvNeedle What to search for - exact search.
|
---|
119 | * @param cbNeedle Size of the search byte string.
|
---|
120 | * @param pHitAddress Where to put the address of the first hit.
|
---|
121 | *
|
---|
122 | * @thread Any thread.
|
---|
123 | */
|
---|
124 | VMMR3DECL(int) DBGFR3MemScan(PVM pVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, RTGCUINTPTR cbRange, RTGCUINTPTR uAlign,
|
---|
125 | const void *pvNeedle, size_t cbNeedle, PDBGFADDRESS pHitAddress)
|
---|
126 | {
|
---|
127 | AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_PARAMETER);
|
---|
128 | return VMR3ReqCallWait(pVM, idCpu, (PFNRT)dbgfR3MemScan, 8,
|
---|
129 | pVM, idCpu, pAddress, &cbRange, &uAlign, pvNeedle, cbNeedle, pHitAddress);
|
---|
130 |
|
---|
131 | }
|
---|
132 |
|
---|
133 |
|
---|
134 | /**
|
---|
135 | * Read guest memory.
|
---|
136 | *
|
---|
137 | * @returns VBox status code.
|
---|
138 | * @param pVM Pointer to the shared VM structure.
|
---|
139 | * @param pAddress Where to start reading.
|
---|
140 | * @param pvBuf Where to store the data we've read.
|
---|
141 | * @param cbRead The number of bytes to read.
|
---|
142 | */
|
---|
143 | static DECLCALLBACK(int) dbgfR3MemRead(PVM pVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, void *pvBuf, size_t cbRead)
|
---|
144 | {
|
---|
145 | Assert(idCpu == VMMGetCpuId(pVM));
|
---|
146 |
|
---|
147 | /*
|
---|
148 | * Validate the input we use, PGM does the rest.
|
---|
149 | */
|
---|
150 | if (!DBGFR3AddrIsValid(pVM, pAddress))
|
---|
151 | return VERR_INVALID_POINTER;
|
---|
152 | if (!VALID_PTR(pvBuf))
|
---|
153 | return VERR_INVALID_POINTER;
|
---|
154 |
|
---|
155 | /*
|
---|
156 | * HMA is special
|
---|
157 | */
|
---|
158 | int rc;
|
---|
159 | if (DBGFADDRESS_IS_HMA(pAddress))
|
---|
160 | {
|
---|
161 | if (DBGFADDRESS_IS_PHYS(pAddress))
|
---|
162 | rc = VERR_INVALID_POINTER;
|
---|
163 | else
|
---|
164 | rc = MMR3HyperReadGCVirt(pVM, pvBuf, pAddress->FlatPtr, cbRead);
|
---|
165 | }
|
---|
166 | else
|
---|
167 | {
|
---|
168 | /*
|
---|
169 | * Select DBGF worker by addressing mode.
|
---|
170 | */
|
---|
171 | PVMCPU pVCpu = VMMGetCpuById(pVM, idCpu);
|
---|
172 | PGMMODE enmMode = PGMGetGuestMode(pVCpu);
|
---|
173 | if ( enmMode == PGMMODE_REAL
|
---|
174 | || enmMode == PGMMODE_PROTECTED
|
---|
175 | || DBGFADDRESS_IS_PHYS(pAddress) )
|
---|
176 | rc = PGMPhysSimpleReadGCPhys(pVM, pvBuf, pAddress->FlatPtr, cbRead);
|
---|
177 | else
|
---|
178 | {
|
---|
179 | #if GC_ARCH_BITS > 32
|
---|
180 | if ( ( pAddress->FlatPtr >= _4G
|
---|
181 | || pAddress->FlatPtr + cbRead > _4G)
|
---|
182 | && enmMode != PGMMODE_AMD64
|
---|
183 | && enmMode != PGMMODE_AMD64_NX)
|
---|
184 | return VERR_PAGE_TABLE_NOT_PRESENT;
|
---|
185 | #endif
|
---|
186 | rc = PGMPhysSimpleReadGCPtr(pVCpu, pvBuf, pAddress->FlatPtr, cbRead);
|
---|
187 | }
|
---|
188 | }
|
---|
189 | return rc;
|
---|
190 | }
|
---|
191 |
|
---|
192 |
|
---|
193 | /**
|
---|
194 | * Read guest memory.
|
---|
195 | *
|
---|
196 | * @returns VBox status code.
|
---|
197 | *
|
---|
198 | * @param pVM Pointer to the shared VM structure.
|
---|
199 | * @param idCpu The ID of the source CPU context (for the address).
|
---|
200 | * @param pAddress Where to start reading.
|
---|
201 | * @param pvBuf Where to store the data we've read.
|
---|
202 | * @param cbRead The number of bytes to read.
|
---|
203 | */
|
---|
204 | VMMR3DECL(int) DBGFR3MemRead(PVM pVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, void *pvBuf, size_t cbRead)
|
---|
205 | {
|
---|
206 | AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_PARAMETER);
|
---|
207 | if ((pAddress->fFlags & DBGFADDRESS_FLAGS_TYPE_MASK) == DBGFADDRESS_FLAGS_RING0)
|
---|
208 | {
|
---|
209 | AssertCompile(sizeof(RTHCUINTPTR) <= sizeof(pAddress->FlatPtr));
|
---|
210 | return VMMR3ReadR0Stack(pVM, idCpu, (RTHCUINTPTR)pAddress->FlatPtr, pvBuf, cbRead);
|
---|
211 | }
|
---|
212 | return VMR3ReqCallWaitU(pVM->pUVM, idCpu, (PFNRT)dbgfR3MemRead, 5, pVM, idCpu, pAddress, pvBuf, cbRead);
|
---|
213 | }
|
---|
214 |
|
---|
215 |
|
---|
216 | /**
|
---|
217 | * Read a zero terminated string from guest memory.
|
---|
218 | *
|
---|
219 | * @returns VBox status code.
|
---|
220 | *
|
---|
221 | * @param pVM Pointer to the shared VM structure.
|
---|
222 | * @param idCpu The ID of the source CPU context (for the address).
|
---|
223 | * @param pAddress Where to start reading.
|
---|
224 | * @param pszBuf Where to store the string.
|
---|
225 | * @param cchBuf The size of the buffer.
|
---|
226 | */
|
---|
227 | static DECLCALLBACK(int) dbgfR3MemReadString(PVM pVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, char *pszBuf, size_t cchBuf)
|
---|
228 | {
|
---|
229 | /*
|
---|
230 | * Validate the input we use, PGM does the rest.
|
---|
231 | */
|
---|
232 | if (!DBGFR3AddrIsValid(pVM, pAddress))
|
---|
233 | return VERR_INVALID_POINTER;
|
---|
234 | if (!VALID_PTR(pszBuf))
|
---|
235 | return VERR_INVALID_POINTER;
|
---|
236 |
|
---|
237 | /*
|
---|
238 | * Let dbgfR3MemRead do the job.
|
---|
239 | */
|
---|
240 | int rc = dbgfR3MemRead(pVM, idCpu, pAddress, pszBuf, cchBuf);
|
---|
241 |
|
---|
242 | /*
|
---|
243 | * Make sure the result is terminated and that overflow is signaled.
|
---|
244 | * This may look a bit reckless with the rc but, it should be fine.
|
---|
245 | */
|
---|
246 | if (!memchr(pszBuf, '\0', cchBuf))
|
---|
247 | {
|
---|
248 | pszBuf[cchBuf - 1] = '\0';
|
---|
249 | rc = VINF_BUFFER_OVERFLOW;
|
---|
250 | }
|
---|
251 | /*
|
---|
252 | * Handle partial reads (not perfect).
|
---|
253 | */
|
---|
254 | else if (RT_FAILURE(rc))
|
---|
255 | {
|
---|
256 | if (pszBuf[0])
|
---|
257 | rc = VINF_SUCCESS;
|
---|
258 | }
|
---|
259 |
|
---|
260 | return rc;
|
---|
261 | }
|
---|
262 |
|
---|
263 |
|
---|
264 | /**
|
---|
265 | * Read a zero terminated string from guest memory.
|
---|
266 | *
|
---|
267 | * @returns VBox status code.
|
---|
268 | *
|
---|
269 | * @param pVM Pointer to the shared VM structure.
|
---|
270 | * @param idCpu The ID of the source CPU context (for the address).
|
---|
271 | * @param pAddress Where to start reading.
|
---|
272 | * @param pszBuf Where to store the string.
|
---|
273 | * @param cchBuf The size of the buffer.
|
---|
274 | */
|
---|
275 | VMMR3DECL(int) DBGFR3MemReadString(PVM pVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, char *pszBuf, size_t cchBuf)
|
---|
276 | {
|
---|
277 | /*
|
---|
278 | * Validate and zero output.
|
---|
279 | */
|
---|
280 | if (!VALID_PTR(pszBuf))
|
---|
281 | return VERR_INVALID_POINTER;
|
---|
282 | if (cchBuf <= 0)
|
---|
283 | return VERR_INVALID_PARAMETER;
|
---|
284 | memset(pszBuf, 0, cchBuf);
|
---|
285 | AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_PARAMETER);
|
---|
286 |
|
---|
287 | /*
|
---|
288 | * Pass it on to the EMT.
|
---|
289 | */
|
---|
290 | return VMR3ReqCallWaitU(pVM->pUVM, idCpu, (PFNRT)dbgfR3MemReadString, 5, pVM, idCpu, pAddress, pszBuf, cchBuf);
|
---|
291 | }
|
---|
292 |
|
---|
293 |
|
---|
294 | /**
|
---|
295 | * Writes guest memory.
|
---|
296 | *
|
---|
297 | * @returns VBox status code.
|
---|
298 | *
|
---|
299 | * @param pVM Pointer to the shared VM structure.
|
---|
300 | * @param idCpu The ID of the target CPU context (for the address).
|
---|
301 | * @param pAddress Where to start writing.
|
---|
302 | * @param pvBuf The data to write.
|
---|
303 | * @param cbWrite The number of bytes to write.
|
---|
304 | */
|
---|
305 | static DECLCALLBACK(int) dbgfR3MemWrite(PVM pVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, void const *pvBuf, size_t cbWrite)
|
---|
306 | {
|
---|
307 | /*
|
---|
308 | * Validate the input we use, PGM does the rest.
|
---|
309 | */
|
---|
310 | if (!DBGFR3AddrIsValid(pVM, pAddress))
|
---|
311 | return VERR_INVALID_POINTER;
|
---|
312 | if (!VALID_PTR(pvBuf))
|
---|
313 | return VERR_INVALID_POINTER;
|
---|
314 |
|
---|
315 | /*
|
---|
316 | * HMA is always special.
|
---|
317 | */
|
---|
318 | int rc;
|
---|
319 | if (DBGFADDRESS_IS_HMA(pAddress))
|
---|
320 | {
|
---|
321 | /** @todo write to HMA. */
|
---|
322 | rc = VERR_ACCESS_DENIED;
|
---|
323 | }
|
---|
324 | else
|
---|
325 | {
|
---|
326 | /*
|
---|
327 | * Select PGM function by addressing mode.
|
---|
328 | */
|
---|
329 | PVMCPU pVCpu = VMMGetCpuById(pVM, idCpu);
|
---|
330 | PGMMODE enmMode = PGMGetGuestMode(pVCpu);
|
---|
331 | if ( enmMode == PGMMODE_REAL
|
---|
332 | || enmMode == PGMMODE_PROTECTED
|
---|
333 | || DBGFADDRESS_IS_PHYS(pAddress) )
|
---|
334 | rc = PGMPhysSimpleWriteGCPhys(pVM, pAddress->FlatPtr, pvBuf, cbWrite);
|
---|
335 | else
|
---|
336 | {
|
---|
337 | #if GC_ARCH_BITS > 32
|
---|
338 | if ( ( pAddress->FlatPtr >= _4G
|
---|
339 | || pAddress->FlatPtr + cbWrite > _4G)
|
---|
340 | && enmMode != PGMMODE_AMD64
|
---|
341 | && enmMode != PGMMODE_AMD64_NX)
|
---|
342 | return VERR_PAGE_TABLE_NOT_PRESENT;
|
---|
343 | #endif
|
---|
344 | rc = PGMPhysSimpleWriteGCPtr(pVCpu, pAddress->FlatPtr, pvBuf, cbWrite);
|
---|
345 | }
|
---|
346 | }
|
---|
347 | return rc;
|
---|
348 | }
|
---|
349 |
|
---|
350 |
|
---|
351 | /**
|
---|
352 | * Read guest memory.
|
---|
353 | *
|
---|
354 | * @returns VBox status code.
|
---|
355 | *
|
---|
356 | * @param pVM Pointer to the shared VM structure.
|
---|
357 | * @param idCpu The ID of the target CPU context (for the address).
|
---|
358 | * @param pAddress Where to start writing.
|
---|
359 | * @param pvBuf The data to write.
|
---|
360 | * @param cbRead The number of bytes to write.
|
---|
361 | */
|
---|
362 | VMMR3DECL(int) DBGFR3MemWrite(PVM pVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, void const *pvBuf, size_t cbWrite)
|
---|
363 | {
|
---|
364 | AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_PARAMETER);
|
---|
365 | return VMR3ReqCallWaitU(pVM->pUVM, idCpu, (PFNRT)dbgfR3MemWrite, 5, pVM, idCpu, pAddress, pvBuf, cbWrite);
|
---|
366 | }
|
---|
367 |
|
---|
368 |
|
---|
369 | /**
|
---|
370 | * Worker for DBGFR3SelQueryInfo that calls into SELM.
|
---|
371 | */
|
---|
372 | static DECLCALLBACK(int) dbgfR3SelQueryInfo(PVM pVM, VMCPUID idCpu, RTSEL Sel, uint32_t fFlags, PDBGFSELINFO pSelInfo)
|
---|
373 | {
|
---|
374 | /*
|
---|
375 | * Make the query.
|
---|
376 | */
|
---|
377 | int rc;
|
---|
378 | if (!(fFlags & DBGFSELQI_FLAGS_DT_SHADOW))
|
---|
379 | {
|
---|
380 | PVMCPU pVCpu = VMMGetCpuById(pVM, idCpu);
|
---|
381 | VMCPU_ASSERT_EMT(pVCpu);
|
---|
382 | rc = SELMR3GetSelectorInfo(pVM, pVCpu, Sel, pSelInfo);
|
---|
383 |
|
---|
384 | /*
|
---|
385 | * 64-bit mode HACKS for making data and stack selectors wide open when
|
---|
386 | * queried. This is voodoo magic.
|
---|
387 | */
|
---|
388 | if (fFlags & DBGFSELQI_FLAGS_DT_ADJ_64BIT_MODE)
|
---|
389 | {
|
---|
390 | /* Expand 64-bit data and stack selectors. The check is a bit bogus... */
|
---|
391 | if ( RT_SUCCESS(rc)
|
---|
392 | && (pSelInfo->fFlags & ( DBGFSELINFO_FLAGS_LONG_MODE | DBGFSELINFO_FLAGS_REAL_MODE | DBGFSELINFO_FLAGS_PROT_MODE
|
---|
393 | | DBGFSELINFO_FLAGS_GATE | DBGFSELINFO_FLAGS_HYPER
|
---|
394 | | DBGFSELINFO_FLAGS_INVALID | DBGFSELINFO_FLAGS_NOT_PRESENT))
|
---|
395 | == DBGFSELINFO_FLAGS_LONG_MODE
|
---|
396 | && pSelInfo->cbLimit != ~(RTGCPTR)0
|
---|
397 | && CPUMIsGuestIn64BitCode(pVCpu, CPUMGetGuestCtxCore(pVCpu)) )
|
---|
398 | {
|
---|
399 | pSelInfo->GCPtrBase = 0;
|
---|
400 | pSelInfo->cbLimit = ~(RTGCPTR)0;
|
---|
401 | }
|
---|
402 | else if ( Sel == 0
|
---|
403 | && CPUMIsGuestIn64BitCode(pVCpu, CPUMGetGuestCtxCore(pVCpu)))
|
---|
404 | {
|
---|
405 | pSelInfo->GCPtrBase = 0;
|
---|
406 | pSelInfo->cbLimit = ~(RTGCPTR)0;
|
---|
407 | pSelInfo->Sel = 0;
|
---|
408 | pSelInfo->SelGate = 0;
|
---|
409 | pSelInfo->fFlags = DBGFSELINFO_FLAGS_LONG_MODE;
|
---|
410 | pSelInfo->u.Raw64.Gen.u1Present = 1;
|
---|
411 | pSelInfo->u.Raw64.Gen.u1Long = 1;
|
---|
412 | pSelInfo->u.Raw64.Gen.u1DescType = 1;
|
---|
413 | rc = VINF_SUCCESS;
|
---|
414 | }
|
---|
415 | }
|
---|
416 | }
|
---|
417 | else
|
---|
418 | {
|
---|
419 | if (HWACCMIsEnabled(pVM))
|
---|
420 | rc = VERR_INVALID_STATE;
|
---|
421 | else
|
---|
422 | rc = SELMR3GetShadowSelectorInfo(pVM, Sel, pSelInfo);
|
---|
423 | }
|
---|
424 | return rc;
|
---|
425 | }
|
---|
426 |
|
---|
427 |
|
---|
428 | /**
|
---|
429 | * Gets information about a selector.
|
---|
430 | *
|
---|
431 | * Intended for the debugger mostly and will prefer the guest
|
---|
432 | * descriptor tables over the shadow ones.
|
---|
433 | *
|
---|
434 | * @returns VBox status code, the following are the common ones.
|
---|
435 | * @retval VINF_SUCCESS on success.
|
---|
436 | * @retval VERR_INVALID_SELECTOR if the selector isn't fully inside the
|
---|
437 | * descriptor table.
|
---|
438 | * @retval VERR_SELECTOR_NOT_PRESENT if the LDT is invalid or not present. This
|
---|
439 | * is not returned if the selector itself isn't present, you have to
|
---|
440 | * check that for yourself (see DBGFSELINFO::fFlags).
|
---|
441 | * @retval VERR_PAGE_TABLE_NOT_PRESENT or VERR_PAGE_NOT_PRESENT if the
|
---|
442 | * pagetable or page backing the selector table wasn't present.
|
---|
443 | *
|
---|
444 | * @param pVM VM handle.
|
---|
445 | * @param idCpu The ID of the virtual CPU context.
|
---|
446 | * @param Sel The selector to get info about.
|
---|
447 | * @param fFlags Flags, see DBGFQSEL_FLAGS_*.
|
---|
448 | * @param pSelInfo Where to store the information. This will always be
|
---|
449 | * updated.
|
---|
450 | *
|
---|
451 | * @remarks This is a wrapper around SELMR3GetSelectorInfo and
|
---|
452 | * SELMR3GetShadowSelectorInfo.
|
---|
453 | */
|
---|
454 | VMMR3DECL(int) DBGFR3SelQueryInfo(PVM pVM, VMCPUID idCpu, RTSEL Sel, uint32_t fFlags, PDBGFSELINFO pSelInfo)
|
---|
455 | {
|
---|
456 | AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_PARAMETER);
|
---|
457 | AssertReturn(!(fFlags & ~(DBGFSELQI_FLAGS_DT_GUEST | DBGFSELQI_FLAGS_DT_SHADOW | DBGFSELQI_FLAGS_DT_ADJ_64BIT_MODE)), VERR_INVALID_PARAMETER);
|
---|
458 | AssertReturn( (fFlags & (DBGFSELQI_FLAGS_DT_SHADOW | DBGFSELQI_FLAGS_DT_ADJ_64BIT_MODE))
|
---|
459 | != (DBGFSELQI_FLAGS_DT_SHADOW | DBGFSELQI_FLAGS_DT_ADJ_64BIT_MODE), VERR_INVALID_PARAMETER);
|
---|
460 |
|
---|
461 | /* Clear the return data here on this thread. */
|
---|
462 | memset(pSelInfo, 0, sizeof(*pSelInfo));
|
---|
463 |
|
---|
464 | /*
|
---|
465 | * Dispatch the request to a worker running on the target CPU.
|
---|
466 | */
|
---|
467 | return VMR3ReqCallWaitU(pVM->pUVM, idCpu, (PFNRT)dbgfR3SelQueryInfo, 5, pVM, idCpu, Sel, fFlags, pSelInfo);
|
---|
468 | }
|
---|
469 |
|
---|
470 |
|
---|
471 | /**
|
---|
472 | * Validates a CS selector.
|
---|
473 | *
|
---|
474 | * @returns VBox status code.
|
---|
475 | * @param pSelInfo Pointer to the selector information for the CS selector.
|
---|
476 | * @param SelCPL The selector defining the CPL (SS).
|
---|
477 | */
|
---|
478 | VMMDECL(int) DBGFR3SelInfoValidateCS(PCDBGFSELINFO pSelInfo, RTSEL SelCPL)
|
---|
479 | {
|
---|
480 | /*
|
---|
481 | * Check if present.
|
---|
482 | */
|
---|
483 | if (pSelInfo->u.Raw.Gen.u1Present)
|
---|
484 | {
|
---|
485 | /*
|
---|
486 | * Type check.
|
---|
487 | */
|
---|
488 | if ( pSelInfo->u.Raw.Gen.u1DescType == 1
|
---|
489 | && (pSelInfo->u.Raw.Gen.u4Type & X86_SEL_TYPE_CODE))
|
---|
490 | {
|
---|
491 | /*
|
---|
492 | * Check level.
|
---|
493 | */
|
---|
494 | unsigned uLevel = RT_MAX(SelCPL & X86_SEL_RPL, pSelInfo->Sel & X86_SEL_RPL);
|
---|
495 | if ( !(pSelInfo->u.Raw.Gen.u4Type & X86_SEL_TYPE_CONF)
|
---|
496 | ? uLevel <= pSelInfo->u.Raw.Gen.u2Dpl
|
---|
497 | : uLevel >= pSelInfo->u.Raw.Gen.u2Dpl /* hope I got this right now... */
|
---|
498 | )
|
---|
499 | return VINF_SUCCESS;
|
---|
500 | return VERR_INVALID_RPL;
|
---|
501 | }
|
---|
502 | return VERR_NOT_CODE_SELECTOR;
|
---|
503 | }
|
---|
504 | return VERR_SELECTOR_NOT_PRESENT;
|
---|
505 | }
|
---|
506 |
|
---|