SELM.cpp revision 97e6b993cdf166724603c2ffd50bc7b6d984e8ee
2N/A * available from http://www.virtualbox.org. This file is free software;
2N/A#include "SELMInternal.h"
2N/A#include "SELMInline.h"
2N/Astatic DECLCALLBACK(int) selmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass);
2N/Astatic DECLCALLBACK(int) selmR3GuestGDTWriteHandler(PVM pVM, RTGCPTR GCPtr, void *pvPhys, void *pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser);
2N/Astatic DECLCALLBACK(int) selmR3GuestLDTWriteHandler(PVM pVM, RTGCPTR GCPtr, void *pvPhys, void *pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser);
2N/Astatic DECLCALLBACK(int) selmR3GuestTSSWriteHandler(PVM pVM, RTGCPTR GCPtr, void *pvPhys, void *pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser);
2N/A//static DECLCALLBACK(void) selmR3InfoTssGuest(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
2N/A#ifdef LOG_ENABLED
2N/A AssertCompile(sizeof(pVM->selm.s) <= sizeof(pVM->selm.padding)); AssertRelease(sizeof(pVM->selm.s) <= sizeof(pVM->selm.padding));
2N/A AssertCompile((RT_OFFSETOF(VM, selm.s.Tss) & PAGE_OFFSET_MASK) <= PAGE_SIZE - sizeof(pVM->selm.s.Tss));
2N/A AssertCompile((RT_OFFSETOF(VM, selm.s.TssTrap08) & PAGE_OFFSET_MASK) <= PAGE_SIZE - sizeof(pVM->selm.s.TssTrap08));
AssertRelease((RT_OFFSETOF(VM, selm.s.Tss) & PAGE_OFFSET_MASK) <= PAGE_SIZE - sizeof(pVM->selm.s.Tss));
AssertRelease((RT_OFFSETOF(VM, selm.s.TssTrap08) & PAGE_OFFSET_MASK) <= PAGE_SIZE - sizeof(pVM->selm.s.TssTrap08));
return rc;
STAM_REG(pVM, &pVM->selm.s.StatRCWriteGuestGDTHandled, STAMTYPE_COUNTER, "/SELM/GC/Write/Guest/GDTInt", STAMUNIT_OCCURENCES, "The number of handled writes to the Guest GDT.");
STAM_REG(pVM, &pVM->selm.s.StatRCWriteGuestGDTUnhandled, STAMTYPE_COUNTER, "/SELM/GC/Write/Guest/GDTEmu", STAMUNIT_OCCURENCES, "The number of unhandled writes to the Guest GDT.");
STAM_REG(pVM, &pVM->selm.s.StatRCWriteGuestLDT, STAMTYPE_COUNTER, "/SELM/GC/Write/Guest/LDT", STAMUNIT_OCCURENCES, "The number of writes to the Guest LDT was detected.");
STAM_REG(pVM, &pVM->selm.s.StatRCWriteGuestTSSHandled, STAMTYPE_COUNTER, "/SELM/GC/Write/Guest/TSSInt", STAMUNIT_OCCURENCES, "The number of handled writes to the Guest TSS.");
STAM_REG(pVM, &pVM->selm.s.StatRCWriteGuestTSSRedir, STAMTYPE_COUNTER, "/SELM/GC/Write/Guest/TSSRedir",STAMUNIT_OCCURENCES, "The number of handled redir bitmap writes to the Guest TSS.");
STAM_REG(pVM, &pVM->selm.s.StatRCWriteGuestTSSHandledChanged,STAMTYPE_COUNTER, "/SELM/GC/Write/Guest/TSSIntChg", STAMUNIT_OCCURENCES, "The number of handled writes to the Guest TSS where the R0 stack changed.");
STAM_REG(pVM, &pVM->selm.s.StatRCWriteGuestTSSUnhandled, STAMTYPE_COUNTER, "/SELM/GC/Write/Guest/TSSEmu", STAMUNIT_OCCURENCES, "The number of unhandled writes to the Guest TSS.");
STAM_REG(pVM, &pVM->selm.s.StatTSSSync, STAMTYPE_PROFILE, "/PROF/SELM/TSSSync", STAMUNIT_TICKS_PER_CALL, "Profiling of the SELMR3SyncTSS() body.");
STAM_REG(pVM, &pVM->selm.s.StatUpdateFromCPUM, STAMTYPE_PROFILE, "/PROF/SELM/UpdateFromCPUM", STAMUNIT_TICKS_PER_CALL, "Profiling of the SELMR3UpdateFromCPUM() body.");
STAM_REL_REG(pVM, &pVM->selm.s.StatHyperSelsChanged, STAMTYPE_COUNTER, "/SELM/HyperSels/Changed", STAMUNIT_OCCURENCES, "The number of times we had to relocate our hypervisor selectors.");
STAM_REL_REG(pVM, &pVM->selm.s.StatScanForHyperSels, STAMTYPE_COUNTER, "/SELM/HyperSels/Scan", STAMUNIT_OCCURENCES, "The number of times we had find free hypervisor selectors.");
STAM_REL_REG(pVM, &pVM->selm.s.aStatDetectedStaleSReg[X86_SREG_ES], STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/DetectedStaleES", STAMUNIT_OCCURENCES, "Stale ES was detected in UpdateFromCPUM.");
STAM_REL_REG(pVM, &pVM->selm.s.aStatDetectedStaleSReg[X86_SREG_CS], STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/DetectedStaleCS", STAMUNIT_OCCURENCES, "Stale CS was detected in UpdateFromCPUM.");
STAM_REL_REG(pVM, &pVM->selm.s.aStatDetectedStaleSReg[X86_SREG_SS], STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/DetectedStaleSS", STAMUNIT_OCCURENCES, "Stale SS was detected in UpdateFromCPUM.");
STAM_REL_REG(pVM, &pVM->selm.s.aStatDetectedStaleSReg[X86_SREG_DS], STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/DetectedStaleDS", STAMUNIT_OCCURENCES, "Stale DS was detected in UpdateFromCPUM.");
STAM_REL_REG(pVM, &pVM->selm.s.aStatDetectedStaleSReg[X86_SREG_FS], STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/DetectedStaleFS", STAMUNIT_OCCURENCES, "Stale FS was detected in UpdateFromCPUM.");
STAM_REL_REG(pVM, &pVM->selm.s.aStatDetectedStaleSReg[X86_SREG_GS], STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/DetectedStaleGS", STAMUNIT_OCCURENCES, "Stale GS was detected in UpdateFromCPUM.");
STAM_REL_REG(pVM, &pVM->selm.s.aStatAlreadyStaleSReg[X86_SREG_ES], STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/AlreadyStaleES", STAMUNIT_OCCURENCES, "Already stale ES in UpdateFromCPUM.");
STAM_REL_REG(pVM, &pVM->selm.s.aStatAlreadyStaleSReg[X86_SREG_CS], STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/AlreadyStaleCS", STAMUNIT_OCCURENCES, "Already stale CS in UpdateFromCPUM.");
STAM_REL_REG(pVM, &pVM->selm.s.aStatAlreadyStaleSReg[X86_SREG_SS], STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/AlreadyStaleSS", STAMUNIT_OCCURENCES, "Already stale SS in UpdateFromCPUM.");
STAM_REL_REG(pVM, &pVM->selm.s.aStatAlreadyStaleSReg[X86_SREG_DS], STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/AlreadyStaleDS", STAMUNIT_OCCURENCES, "Already stale DS in UpdateFromCPUM.");
STAM_REL_REG(pVM, &pVM->selm.s.aStatAlreadyStaleSReg[X86_SREG_FS], STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/AlreadyStaleFS", STAMUNIT_OCCURENCES, "Already stale FS in UpdateFromCPUM.");
STAM_REL_REG(pVM, &pVM->selm.s.aStatAlreadyStaleSReg[X86_SREG_GS], STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/AlreadyStaleGS", STAMUNIT_OCCURENCES, "Already stale GS in UpdateFromCPUM.");
STAM_REL_REG(pVM, &pVM->selm.s.StatStaleToUnstaleSReg, STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/StaleToUnstale", STAMUNIT_OCCURENCES, "Transitions from stale to unstale UpdateFromCPUM.");
STAM_REG( pVM, &pVM->selm.s.aStatUpdatedSReg[X86_SREG_ES], STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/UpdatedES", STAMUNIT_OCCURENCES, "Updated hidden ES values in UpdateFromCPUM.");
STAM_REG( pVM, &pVM->selm.s.aStatUpdatedSReg[X86_SREG_CS], STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/UpdatedCS", STAMUNIT_OCCURENCES, "Updated hidden CS values in UpdateFromCPUM.");
STAM_REG( pVM, &pVM->selm.s.aStatUpdatedSReg[X86_SREG_SS], STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/UpdatedSS", STAMUNIT_OCCURENCES, "Updated hidden SS values in UpdateFromCPUM.");
STAM_REG( pVM, &pVM->selm.s.aStatUpdatedSReg[X86_SREG_DS], STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/UpdatedDS", STAMUNIT_OCCURENCES, "Updated hidden DS values in UpdateFromCPUM.");
STAM_REG( pVM, &pVM->selm.s.aStatUpdatedSReg[X86_SREG_FS], STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/UpdatedFS", STAMUNIT_OCCURENCES, "Updated hidden FS values in UpdateFromCPUM.");
STAM_REG( pVM, &pVM->selm.s.aStatUpdatedSReg[X86_SREG_GS], STAMTYPE_COUNTER, "/SELM/UpdateFromCPUM/UpdatedGS", STAMUNIT_OCCURENCES, "Updated hidden GS values in UpdateFromCPUM.");
STAM_REG( pVM, &pVM->selm.s.StatLoadHidSelGst, STAMTYPE_COUNTER, "/SELM/LoadHidSel/LoadedGuest", STAMUNIT_OCCURENCES, "SELMLoadHiddenSelectorReg: Loaded from guest tables.");
STAM_REG( pVM, &pVM->selm.s.StatLoadHidSelShw, STAMTYPE_COUNTER, "/SELM/LoadHidSel/LoadedShadow", STAMUNIT_OCCURENCES, "SELMLoadHiddenSelectorReg: Loaded from shadow tables.");
STAM_REL_REG(pVM, &pVM->selm.s.StatLoadHidSelReadErrors, STAMTYPE_COUNTER, "/SELM/LoadHidSel/GstReadErrors", STAMUNIT_OCCURENCES, "SELMLoadHiddenSelectorReg: Guest table read errors.");
STAM_REL_REG(pVM, &pVM->selm.s.StatLoadHidSelGstNoGood, STAMTYPE_COUNTER, "/SELM/LoadHidSel/NoGoodGuest", STAMUNIT_OCCURENCES, "SELMLoadHiddenSelectorReg: No good guest table entry.");
#ifdef VBOX_WITH_RAW_MODE
DBGFR3InfoRegisterInternal(pVM, "gdtguest", "Displays the guest GDT. No arguments.", &selmR3InfoGdtGuest);
DBGFR3InfoRegisterInternal(pVM, "ldtguest", "Displays the guest LDT. No arguments.", &selmR3InfoLdtGuest);
//DBGFR3InfoRegisterInternal(pVM, "tssguest", "Displays the guest TSS. No arguments.", &selmR3InfoTssGuest);
return rc;
#ifdef VBOX_WITH_RAW_MODE
# if defined(DEBUG_bird)
rc = PGMMapSetPage(pVM, MMHyperR3ToRC(pVM, &paGdt[pVM->selm.s.aHyperSel[SELM_HYPER_SEL_TSS_TRAP08] >> 3]), sizeof(paGdt[0]),
rc = PGMMapSetPage(pVM, MMHyperR3ToRC(pVM, &paGdt[pVM->selm.s.aHyperSel[SELM_HYPER_SEL_TSS] >> 3]), sizeof(paGdt[0]),
rc = PGMMapSetPage(pVM, VM_RC_ADDR(pVM, &pVM->selm.s.aHyperSel[SELM_HYPER_SEL_TSS]), sizeof(pVM->selm.s.aHyperSel[SELM_HYPER_SEL_TSS]),
rc = PGMMapSetPage(pVM, VM_RC_ADDR(pVM, &pVM->selm.s.aHyperSel[SELM_HYPER_SEL_TSS_TRAP08]), sizeof(pVM->selm.s.aHyperSel[SELM_HYPER_SEL_TSS_TRAP08]),
return VINF_SUCCESS;
pVM->selm.s.TssTrap08.cr3 = PGMGetInterRCCR3(pVM, pVCpu); /* this should give use better survival chances. */
pVM->selm.s.TssTrap08.esp0 = VMMGetStackRC(pVCpu) - PAGE_SIZE / 2; /* upper half can be analysed this way. */
pVM->selm.s.TssTrap08.ecx = VM_RC_ADDR(pVM, &pVM->selm.s.Tss); /* setup ecx to normal Hypervisor TSS address. */
return VINF_SUCCESS;
#ifdef SELM_TRACK_GUEST_GDT_CHANGES
#ifdef SELM_TRACK_GUEST_LDT_CHANGES
#ifdef SELM_TRACK_GUEST_TSS_CHANGES
#ifdef VBOX_WITH_RAW_MODE
bool fIgnored;
return VINF_SUCCESS;
#ifdef VBOX_WITH_RAW_MODE
return VINF_SUCCESS;
return VINF_SUCCESS;
#ifdef VBOX_WITH_RAW_MODE
return VINF_SUCCESS;
int rc = PGMPhysSimpleReadGCPtr(pVCpu, pGDTE, GDTR.pGdt + sizeof(X86DESC), cbEffLimit + 1 - sizeof(X86DESC));
while (cbLeft)
return VERR_SELM_GDT_READ_ERROR;
/** @todo we should try to minimize relocations by making sure our current selectors can be reused. */
int iGDT = 0;
iGDT++;
pGDTECur--;
return VERR_SELM_GDT_TOO_FULL;
#ifdef VBOX_WITH_SAFE_STR
pGDTE++;
#ifdef VBOX_WITH_SAFE_STR
|| CPUMGetGuestTR(pVCpu, NULL) != 0) /* Our shadow TR entry was overwritten when we synced the guest's GDT. */
Log(("SELMR3UpdateFromCPUM: Guest's GDT is changed to pGdt=%016RX64 cbGdt=%08X\n", GDTR.pGdt, GDTR.cbGdt));
#ifdef SELM_TRACK_GUEST_GDT_CHANGES
# ifdef VBOX_WITH_RAW_RING1
LogRel(("selmR3UpdateShadowGdt: Virtual handler conflict %RGv -> kick out PATM handler for the higher priority GDT page monitor\n", GDTR.pGdt));
return rc;
return VINF_SUCCESS;
return VINF_SUCCESS;
if ( !cbLdt
return VINF_SUCCESS;
AssertMsg(RT_ALIGN(cbLdt + 1, sizeof(X86DESC)) == cbLdt + 1 && cbLdt <= 0xffff, ("cbLdt=%d\n", cbLdt));
Log(("SELMR3UpdateFromCPUM: Guest LDT changed to from %RGv:%04x to %RGv:%04x. (GDTR=%016RX64:%04x)\n",
pVM->selm.s.GCPtrGuestLdt, pVM->selm.s.cbLdtLimit, GCPtrLdt, cbLdt, pVM->selm.s.GuestGdtr.pGdt, pVM->selm.s.GuestGdtr.cbGdt));
#ifdef SELM_TRACK_GUEST_LDT_CHANGES
# ifdef DEBUG
rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_WRITE, GCPtrLdt, GCPtrLdt + cbLdt /* already inclusive */,
/** @todo investigate the various cases where conflicts happen and try avoid them by enh. the instruction emulation. */
Log(("WARNING: Guest LDT (%RGv:%04x) conflicted with existing access range!! Assumes LDT is begin updated. (GDTR=%016RX64:%04x)\n",
return rc;
unsigned off;
while (cbLeft)
rc = PGMMapSetPage(pVM, GCPtrShadowLDT & PAGE_BASE_GC_MASK, PAGE_SIZE, X86_PTE_P | X86_PTE_A | X86_PTE_D);
pLDTE++;
return VINF_SUCCESS;
return VINF_SUCCESS;
pDesc = &((PCX86DESC)((uintptr_t)pVM->selm.s.pvLdtR3 + pVM->selm.s.offLdtHyper))[Sel >> X86_SEL_SHIFT];
return rcStrict;
int rc;
return rc;
return rc;
return rcStrict;
#ifdef SELM_TRACK_GUEST_GDT_CHANGES
static DECLCALLBACK(int) selmR3GuestGDTWriteHandler(PVM pVM, RTGCPTR GCPtr, void *pvPtr, void *pvBuf, size_t cbBuf,
Log(("selmR3GuestGDTWriteHandler: write to %RGv size %d\n", GCPtr, cbBuf)); NOREF(GCPtr); NOREF(cbBuf);
return VINF_PGM_HANDLER_DO_DEFAULT;
#ifdef SELM_TRACK_GUEST_LDT_CHANGES
static DECLCALLBACK(int) selmR3GuestLDTWriteHandler(PVM pVM, RTGCPTR GCPtr, void *pvPtr, void *pvBuf, size_t cbBuf,
Log(("selmR3GuestLDTWriteHandler: write to %RGv size %d\n", GCPtr, cbBuf)); NOREF(GCPtr); NOREF(cbBuf);
return VINF_PGM_HANDLER_DO_DEFAULT;
#ifdef SELM_TRACK_GUEST_TSS_CHANGES
static DECLCALLBACK(int) selmR3GuestTSSWriteHandler(PVM pVM, RTGCPTR GCPtr, void *pvPtr, void *pvBuf, size_t cbBuf,
Log(("selmR3GuestTSSWriteHandler: write %.*Rhxs to %RGv size %d\n", RT_MIN(8, cbBuf), pvBuf, GCPtr, cbBuf));
return VINF_PGM_HANDLER_DO_DEFAULT;
#ifdef VBOX_WITH_RAW_MODE
int rc;
|| (cbTss == 0xffff && GCPtrTss == 0 && trHid.Attr.n.u1Present && trHid.Attr.n.u4Type == X86_SEL_TYPE_SYS_386_TSS_BUSY /* RESET */));
if (!++cbTss)
|| (cbTss == 0xffff && GCPtrTss == 0 && trHid.Attr.n.u1Present && trHid.Attr.n.u4Type == X86_SEL_TYPE_SYS_386_TSS_BUSY /* RESET */));
cbMonitoredTss = 0;
bool fNoRing1Stack = true;
if (cbMonitoredTss)
&& Tss.offIoBitmap > cbTss) /* beyond the end */ /** @todo not sure how the partial case is handled; probably not allowed. */
# ifdef LOG_ENABLED
if (LogIsEnabled())
# ifdef VBOX_WITH_RAW_RING1
Log(("SELMR3SyncTSS: Updating TSS ring 1 stack to %04X:%08X from %04X:%08X\n", Tss.ss1, Tss.esp1, (pVM->selm.s.Tss.ss2 & ~2) | 1, pVM->selm.s.Tss.esp2));
if (fNoRing1Stack)
if (cbMonitoredTss != 0)
# ifdef SELM_TRACK_GUEST_TSS_CHANGES
rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_WRITE, GCPtrTss, GCPtrTss + cbMonitoredTss - 1,
# ifdef VBOX_WITH_RAW_RING1
LogRel(("SELMR3SyncTSS: Virtual handler conflict %RGv -> kick out PATM handler for the higher priority TSS page monitor\n", GCPtrTss));
rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_WRITE, GCPtrTss, GCPtrTss + cbMonitoredTss - 1,
return rc;
return rc;
return VINF_SUCCESS;
#ifdef VBOX_STRICT
return VINF_SUCCESS;
Log(("SELMR3DebugCheck: limits have changed! new=%d old=%d\n", GDTR.cbGdt, pVM->selm.s.GuestGdtr.cbGdt));
pGDTE++;
return VINF_SUCCESS;
return VERR_SELM_LDT_OUT_OF_BOUNDS;
int rc = PGMPhysSimpleReadGCPtr(pVCpu, &LDTDesc, GDTR.pGdt + (SelLdt & X86_SEL_MASK), sizeof(LDTDesc));
return rc;
if (!cbLdt)
return VINF_SUCCESS;
AssertMsg(RT_ALIGN(cbLdt + 1, sizeof(X86DESC)) == cbLdt + 1 && cbLdt <= 0xffff, ("cbLdt=%d\n", cbLdt));
return VERR_SELM_INVALID_LDT;
pLDTE++;
return VINF_SUCCESS;
|| (cbTss == 0xffff && GCPtrTss == 0 && trHid.Attr.n.u1Present && trHid.Attr.n.u4Type == X86_SEL_TYPE_SYS_386_TSS_BUSY /* RESET */));
if (!++cbTss)
|| (cbTss == 0xffff && GCPtrTss == 0 && trHid.Attr.n.u1Present && trHid.Attr.n.u4Type == X86_SEL_TYPE_SYS_386_TSS_BUSY /* RESET */),
AssertMsgReturn(pVM->selm.s.cbGuestTss == cbTss, ("%#x %#x\n", pVM->selm.s.cbGuestTss, cbTss), false);
AssertMsgReturn(pVM->selm.s.fGuestTss32Bit == ( trHid.Attr.n.u4Type == X86_SEL_TYPE_SYS_386_TSS_AVAIL
cbMonitoredTss = 0;
if (cbMonitoredTss)
AssertMsgReturn(!memcmp(&Tss.IntRedirBitmap[0], &pVM->selm.s.Tss.IntRedirBitmap[0], sizeof(Tss.IntRedirBitmap)),
AssertMsgReturn(pVM->selm.s.cbMonitoredGuestTss == cbMonitoredTss, ("%#x %#x\n", pVM->selm.s.cbMonitoredGuestTss, cbMonitoredTss), false);
AssertMsgReturn(pVM->selm.s.Tss.ss1 == 0 && pVM->selm.s.Tss.esp1 == 0, ("%04x:%08x\n", pVM->selm.s.Tss.ss1, pVM->selm.s.Tss.esp1), false);
AssertMsgReturn(pVM->selm.s.cbMonitoredGuestTss == cbMonitoredTss, ("%#x %#x\n", pVM->selm.s.cbMonitoredGuestTss, cbMonitoredTss), false);
# ifdef VBOX_WITH_SAFE_STR
# ifdef VBOX_STRICT
|| (pDesc->Gen.u4Type != X86_SEL_TYPE_SYS_386_TSS_AVAIL && pDesc->Gen.u4Type != X86_SEL_TYPE_SYS_386_TSS_BUSY)
AssertFailed();
return VERR_INVALID_SELECTOR;
return VERR_INVALID_SELECTOR;
return rc;
return VINF_SUCCESS;
return VERR_INVALID_SELECTOR;
return VERR_INVALID_SELECTOR;
return rc;
return VINF_SUCCESS;
return VINF_SUCCESS;
return VINF_SUCCESS;
unsigned cch;
const char *psz;
selmR3FormatDescriptor(pVM->selm.s.paGdtR3[iGDT], iGDT << X86_SEL_SHIFT, &szOutput[0], sizeof(szOutput));
pHlp->pfnPrintf(pHlp, "%04x - read error rc=%Rrc GCAddr=%RGv\n", iGDT << X86_SEL_SHIFT, rc, GCPtrGDT);
pHlp->pfnPrintf(pHlp, "Shadow LDT (GCAddr=%RRv limit=%#x):\n", pVM->selm.s.pvLdtRC + pVM->selm.s.offLdtHyper, pVM->selm.s.cbLdtLimit);
selmR3FormatDescriptor(paLDT[iLDT], (iLDT << X86_SEL_SHIFT) | X86_SEL_LDT, &szOutput[0], sizeof(szOutput));
selmR3FormatDescriptor(LdtE, (iLdt << X86_SEL_SHIFT) | X86_SEL_LDT, &szOutput[0], sizeof(szOutput));
pHlp->pfnPrintf(pHlp, "%04x - page not present (GCAddr=%RGv)\n", (iLdt << X86_SEL_SHIFT) | X86_SEL_LDT, GCPtrLdt);
pHlp->pfnPrintf(pHlp, "%04x - read error rc=%Rrc GCAddr=%RGv\n", (iLdt << X86_SEL_SHIFT) | X86_SEL_LDT, rc, GCPtrLdt);