/* $Id: TRPMAll.cpp 10087 2008-07-02 09:27:32Z vboxsync $ */ /** @file * TRPM - Trap Monitor - Any Context. */ /* * Copyright (C) 2006-2007 Sun Microsystems, Inc. * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa * Clara, CA 95054 USA or visit http://www.sun.com if you need * additional information or have any questions. */ /******************************************************************************* * Header Files * *******************************************************************************/ #define LOG_GROUP LOG_GROUP_TRPM #include #include #include #include #include #include #include "TRPMInternal.h" #include #include #include #include #include #include #include #include /** * Query info about the current active trap/interrupt. * If no trap is active active an error code is returned. * * @returns VBox status code. * @param pVM The virtual machine. * @param pu8TrapNo Where to store the trap number. * @param pEnmType Where to store the trap type */ TRPMDECL(int) TRPMQueryTrap(PVM pVM, uint8_t *pu8TrapNo, TRPMEVENT *pEnmType) { /* * Check if we have a trap at present. */ if (pVM->trpm.s.uActiveVector != ~0U) { if (pu8TrapNo) *pu8TrapNo = (uint8_t)pVM->trpm.s.uActiveVector; if (pEnmType) *pEnmType = pVM->trpm.s.enmActiveType; return VINF_SUCCESS; } return VERR_TRPM_NO_ACTIVE_TRAP; } /** * Gets the trap number for the current trap. * * The caller is responsible for making sure there is an active trap which * takes an error code when making this request. * * @returns The current trap number. * @param pVM VM handle. */ TRPMDECL(uint8_t) TRPMGetTrapNo(PVM pVM) { AssertMsg(pVM->trpm.s.uActiveVector != ~0U, ("No active trap!\n")); return (uint8_t)pVM->trpm.s.uActiveVector; } /** * Gets the error code for the current trap. * * The caller is responsible for making sure there is an active trap which * takes an error code when making this request. * * @returns Error code. * @param pVM VM handle. */ TRPMDECL(RTGCUINT) TRPMGetErrorCode(PVM pVM) { AssertMsg(pVM->trpm.s.uActiveVector != ~0U, ("No active trap!\n")); #ifdef VBOX_STRICT switch (pVM->trpm.s.uActiveVector) { case 0x0a: case 0x0b: case 0x0c: case 0x0d: case 0x0e: case 0x11: case 0x08: break; default: AssertMsgFailed(("This trap (%#x) doesn't have any error code\n", pVM->trpm.s.uActiveVector)); break; } #endif return pVM->trpm.s.uActiveErrorCode; } /** * Gets the fault address for the current trap. * * The caller is responsible for making sure there is an active trap 0x0e when * making this request. * * @returns Fault address associated with the trap. * @param pVM VM handle. */ TRPMDECL(RTGCUINTPTR) TRPMGetFaultAddress(PVM pVM) { AssertMsg(pVM->trpm.s.uActiveVector != ~0U, ("No active trap!\n")); AssertMsg(pVM->trpm.s.uActiveVector == 0xe, ("Not trap 0e!\n")); return pVM->trpm.s.uActiveCR2; } /** * Clears the current active trap/exception/interrupt. * * The caller is responsible for making sure there is an active trap * when making this request. * * @returns VBox status code. * @param pVM The virtual machine handle. */ TRPMDECL(int) TRPMResetTrap(PVM pVM) { /* * Cannot reset non-existing trap! */ if (pVM->trpm.s.uActiveVector == ~0U) { AssertMsgFailed(("No active trap!\n")); return VERR_TRPM_NO_ACTIVE_TRAP; } /* * Reset it. */ pVM->trpm.s.uActiveVector = ~0U; return VINF_SUCCESS; } /** * Assert trap/exception/interrupt. * * The caller is responsible for making sure there is no active trap * when making this request. * * @returns VBox status code. * @param pVM The virtual machine. * @param u8TrapNo The trap vector to assert. * @param enmType Trap type. */ TRPMDECL(int) TRPMAssertTrap(PVM pVM, uint8_t u8TrapNo, TRPMEVENT enmType) { Log2(("TRPMAssertTrap: u8TrapNo=%02x type=%d\n", u8TrapNo, enmType)); /* * Cannot assert a trap when one is already active. */ if (pVM->trpm.s.uActiveVector != ~0U) { AssertMsgFailed(("Active trap %#x\n", pVM->trpm.s.uActiveVector)); return VERR_TRPM_ACTIVE_TRAP; } pVM->trpm.s.uActiveVector = u8TrapNo; pVM->trpm.s.enmActiveType = enmType; pVM->trpm.s.uActiveErrorCode = ~0; pVM->trpm.s.uActiveCR2 = 0xdeadface; return VINF_SUCCESS; } /** * Sets the error code of the current trap. * (This function is for use in trap handlers and such.) * * The caller is responsible for making sure there is an active trap * which takes an errorcode when making this request. * * @param pVM The virtual machine. * @param uErrorCode The new error code. */ TRPMDECL(void) TRPMSetErrorCode(PVM pVM, RTGCUINT uErrorCode) { Log2(("TRPMSetErrorCode: uErrorCode=%VGv\n", uErrorCode)); AssertMsg(pVM->trpm.s.uActiveVector != ~0U, ("No active trap!\n")); pVM->trpm.s.uActiveErrorCode = uErrorCode; #ifdef VBOX_STRICT switch (pVM->trpm.s.uActiveVector) { case 0x0a: case 0x0b: case 0x0c: case 0x0d: case 0x0e: AssertMsg(uErrorCode != ~(RTGCUINT)0, ("Invalid uErrorCode=%#x u8TrapNo=%d\n", uErrorCode, pVM->trpm.s.uActiveVector)); break; case 0x11: case 0x08: AssertMsg(uErrorCode == 0, ("Invalid uErrorCode=%#x u8TrapNo=%d\n", uErrorCode, pVM->trpm.s.uActiveVector)); break; default: AssertMsg(uErrorCode == ~(RTGCUINT)0, ("Invalid uErrorCode=%#x u8TrapNo=%d\n", uErrorCode, pVM->trpm.s.uActiveVector)); break; } #endif } /** * Sets the error code of the current trap. * (This function is for use in trap handlers and such.) * * The caller is responsible for making sure there is an active trap 0e * when making this request. * * @param pVM The virtual machine. * @param uCR2 The new fault address (cr2 register). */ TRPMDECL(void) TRPMSetFaultAddress(PVM pVM, RTGCUINTPTR uCR2) { Log2(("TRPMSetFaultAddress: uCR2=%VGv\n", uCR2)); AssertMsg(pVM->trpm.s.uActiveVector != ~0U, ("No active trap!\n")); AssertMsg(pVM->trpm.s.uActiveVector == 0xe, ("Not trap 0e!\n")); pVM->trpm.s.uActiveCR2 = uCR2; } /** * Checks if the current active trap/interrupt/exception/fault/whatever is a software * interrupt or not. * * The caller is responsible for making sure there is an active trap * when making this request. * * @returns true if software interrupt, false if not. * * @param pVM VM handle. */ TRPMDECL(bool) TRPMIsSoftwareInterrupt(PVM pVM) { AssertMsg(pVM->trpm.s.uActiveVector != ~0U, ("No active trap!\n")); return (pVM->trpm.s.enmActiveType == TRPM_SOFTWARE_INT); } /** * Check if there is an active trap. * * @returns true if trap active, false if not. * @param pVM The virtual machine. */ TRPMDECL(bool) TRPMHasTrap(PVM pVM) { return pVM->trpm.s.uActiveVector != ~0U; } /** * Query all info about the current active trap/interrupt. * If no trap is active active an error code is returned. * * @returns VBox status code. * @param pVM The virtual machine. * @param pu8TrapNo Where to store the trap number. * @param pEnmType Where to store the trap type * @param puErrorCode Where to store the error code associated with some traps. * ~0U is stored if the trap has no error code. * @param puCR2 Where to store the CR2 associated with a trap 0E. */ TRPMDECL(int) TRPMQueryTrapAll(PVM pVM, uint8_t *pu8TrapNo, TRPMEVENT *pEnmType, PRTGCUINT puErrorCode, PRTGCUINTPTR puCR2) { /* * Check if we have a trap at present. */ if (pVM->trpm.s.uActiveVector == ~0U) return VERR_TRPM_NO_ACTIVE_TRAP; if (pu8TrapNo) *pu8TrapNo = (uint8_t)pVM->trpm.s.uActiveVector; if (pEnmType) *pEnmType = pVM->trpm.s.enmActiveType; if (puErrorCode) *puErrorCode = pVM->trpm.s.uActiveErrorCode; if (puCR2) *puCR2 = pVM->trpm.s.uActiveCR2; return VINF_SUCCESS; } /** * Save the active trap. * * This routine useful when doing try/catch in the hypervisor. * Any function which uses temporary trap handlers should * probably also use this facility to save the original trap. * * @param pVM VM handle. */ TRPMDECL(void) TRPMSaveTrap(PVM pVM) { pVM->trpm.s.uSavedVector = pVM->trpm.s.uActiveVector; pVM->trpm.s.enmSavedType = pVM->trpm.s.enmActiveType; pVM->trpm.s.uSavedErrorCode = pVM->trpm.s.uActiveErrorCode; pVM->trpm.s.uSavedCR2 = pVM->trpm.s.uActiveCR2; } /** * Restore a saved trap. * * Multiple restores of a saved trap is possible. * * @param pVM VM handle. */ TRPMDECL(void) TRPMRestoreTrap(PVM pVM) { pVM->trpm.s.uActiveVector = pVM->trpm.s.uSavedVector; pVM->trpm.s.enmActiveType = pVM->trpm.s.enmSavedType; pVM->trpm.s.uActiveErrorCode = pVM->trpm.s.uSavedErrorCode; pVM->trpm.s.uActiveCR2 = pVM->trpm.s.uSavedCR2; } #ifndef IN_RING0 /** * Forward trap or interrupt to the guest's handler * * * @returns VBox status code. * or does not return at all (when the trap is actually forwarded) * * @param pVM The VM to operate on. * @param pRegFrame Pointer to the register frame for the trap. * @param iGate Trap or interrupt gate number * @param opsize Instruction size (only relevant for software interrupts) * @param enmError TRPM_TRAP_HAS_ERRORCODE or TRPM_TRAP_NO_ERRORCODE. * @param enmType TRPM event type * @param iOrgTrap The original trap. * @internal */ TRPMDECL(int) TRPMForwardTrap(PVM pVM, PCPUMCTXCORE pRegFrame, uint32_t iGate, uint32_t opsize, TRPMERRORCODE enmError, TRPMEVENT enmType, int32_t iOrgTrap) { #ifdef TRPM_FORWARD_TRAPS_IN_GC X86EFLAGS eflags; STAM_PROFILE_ADV_START(CTXSUFF(&pVM->trpm.s.StatForwardProf), a); #ifdef DEBUG if (pRegFrame->eflags.Bits.u1VM) Log(("TRPMForwardTrap-VM: eip=%04X:%04X iGate=%d\n", pRegFrame->cs, pRegFrame->eip, iGate)); else Log(("TRPMForwardTrap: eip=%04X:%VRv iGate=%d\n", pRegFrame->cs, pRegFrame->eip, iGate)); switch (iGate) { case 14: if (pRegFrame->eip == pVM->trpm.s.uActiveCR2) { int rc; RTGCPTR pCallerGC; #ifdef IN_GC rc = MMGCRamRead(pVM, &pCallerGC, (void *)pRegFrame->esp, sizeof(pCallerGC)); #else rc = PGMPhysReadGCPtr(pVM, &pCallerGC, (RTGCPTR)pRegFrame->esp, sizeof(pCallerGC)); #endif if (VBOX_SUCCESS(rc)) { Log(("TRPMForwardTrap: caller=%VGv\n", pCallerGC)); } } /* no break */ case 8: case 10: case 11: case 12: case 13: case 17: Assert(enmError == TRPM_TRAP_HAS_ERRORCODE || enmType == TRPM_SOFTWARE_INT); break; default: Assert(enmError == TRPM_TRAP_NO_ERRORCODE); break; } #endif /* DEBUG */ /* Retrieve the eflags including the virtualized bits. */ /* Note: hackish as the cpumctxcore structure doesn't contain the right value */ eflags.u32 = CPUMRawGetEFlags(pVM, pRegFrame); /* VM_FF_INHIBIT_INTERRUPTS should be cleared upfront or don't call this function at all for dispatching hardware interrupts. */ Assert(enmType != TRPM_HARDWARE_INT || !VM_FF_ISSET(pVM, VM_FF_INHIBIT_INTERRUPTS)); /* * If it's a real guest trap and the guest's page fault handler is marked as safe for GC execution, then we call it directly. * Well, only if the IF flag is set. */ /** @todo if the trap handler was modified and marked invalid, then we should *now* go back to the host context and install a new patch. */ if ( pVM->trpm.s.aGuestTrapHandler[iGate] && (eflags.Bits.u1IF) #ifndef VBOX_RAW_V86 && !(eflags.Bits.u1VM) /** @todo implement when needed (illegal for same privilege level transfers). */ #endif && !PATMIsPatchGCAddr(pVM, (RTRCPTR)pRegFrame->eip) ) { uint16_t cbIDT; RTGCPTR GCPtrIDT = (RTGCPTR)CPUMGetGuestIDTR(pVM, &cbIDT); uint32_t cpl; VBOXIDTE GuestIdte; RTGCPTR pIDTEntry; int rc; Assert(PATMAreInterruptsEnabledByCtxCore(pVM, pRegFrame)); Assert(!VM_FF_ISPENDING(pVM, VM_FF_SELM_SYNC_GDT | VM_FF_SELM_SYNC_LDT | VM_FF_TRPM_SYNC_IDT | VM_FF_SELM_SYNC_TSS)); /* Get the current privilege level. */ cpl = CPUMGetGuestCPL(pVM, pRegFrame); if (GCPtrIDT && iGate * sizeof(VBOXIDTE) >= cbIDT) goto failure; /* * BIG TODO: The checks are not complete. see trap and interrupt dispatching section in Intel docs for details * All very obscure, but still necessary. * Currently only some CS & TSS selector checks are missing. * */ pIDTEntry = (RTGCPTR)((RTGCUINTPTR)GCPtrIDT + sizeof(VBOXIDTE) * iGate); #ifdef IN_GC rc = MMGCRamRead(pVM, &GuestIdte, (void *)pIDTEntry, sizeof(GuestIdte)); #else rc = PGMPhysReadGCPtr(pVM, &GuestIdte, pIDTEntry, sizeof(GuestIdte)); #endif if (VBOX_FAILURE(rc)) { /* The page might be out of sync. */ /** @todo might cross a page boundary) */ Log(("Page %VGv out of sync -> prefetch and try again\n", pIDTEntry)); rc = PGMPrefetchPage(pVM, pIDTEntry); /** @todo r=bird: rainy day: this isn't entirely safe because of access bit virtualiziation and CSAM. */ if (rc != VINF_SUCCESS) { Log(("TRPMForwardTrap: PGMPrefetchPage failed with rc=%Vrc\n", rc)); goto failure; } #ifdef IN_GC rc = MMGCRamRead(pVM, &GuestIdte, (void *)pIDTEntry, sizeof(GuestIdte)); #else rc = PGMPhysReadGCPtr(pVM, &GuestIdte, pIDTEntry, sizeof(GuestIdte)); #endif } if ( VBOX_SUCCESS(rc) && GuestIdte.Gen.u1Present && (GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_TRAP_32 || GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32) && (GuestIdte.Gen.u2DPL == 3 || GuestIdte.Gen.u2DPL == 0) && (GuestIdte.Gen.u16SegSel & 0xfffc) /* must not be zero */ && (enmType == TRPM_TRAP || enmType == TRPM_HARDWARE_INT || cpl <= GuestIdte.Gen.u2DPL) /* CPL <= DPL if software int */ ) { RTGCPTR pHandler, dummy; RTGCPTR pTrapStackGC; pHandler = (RTGCPTR)VBOXIDTE_OFFSET(GuestIdte); /* Note: SELMValidateAndConvertCSAddr checks for code type, memory type, selector validity. */ /** @todo dpl <= cpl else GPF */ /* Note: don't use current eflags as we might be in V86 mode and the IDT always contains protected mode selectors */ X86EFLAGS fakeflags; fakeflags.u32 = 0; rc = SELMValidateAndConvertCSAddr(pVM, fakeflags, 0, GuestIdte.Gen.u16SegSel, NULL, pHandler, &dummy); if (rc == VINF_SUCCESS) { VBOXGDTR gdtr = {0}; bool fConforming = false; int idx = 0; uint32_t dpl; uint32_t ss_r0; uint32_t esp_r0; X86DESC Desc; RTGCPTR pGdtEntry; CPUMGetGuestGDTR(pVM, &gdtr); Assert(gdtr.pGdt && gdtr.cbGdt > GuestIdte.Gen.u16SegSel); if (!gdtr.pGdt) goto failure; pGdtEntry = (RTGCPTR)(uintptr_t)&((X86DESC *)gdtr.pGdt)[GuestIdte.Gen.u16SegSel >> X86_SEL_SHIFT]; /// @todo fix this #ifdef IN_GC rc = MMGCRamRead(pVM, &Desc, (void *)pGdtEntry, sizeof(Desc)); #else rc = PGMPhysReadGCPtr(pVM, &Desc, pGdtEntry, sizeof(Desc)); #endif if (VBOX_FAILURE(rc)) { /* The page might be out of sync. */ /** @todo might cross a page boundary) */ Log(("Page %VGv out of sync -> prefetch and try again\n", pGdtEntry)); rc = PGMPrefetchPage(pVM, pGdtEntry); /** @todo r=bird: rainy day: this isn't entirely safe because of access bit virtualiziation and CSAM. */ if (rc != VINF_SUCCESS) { Log(("PGMPrefetchPage failed with rc=%Vrc\n", rc)); goto failure; } #ifdef IN_GC rc = MMGCRamRead(pVM, &Desc, (void *)pGdtEntry, sizeof(Desc)); #else rc = PGMPhysReadGCPtr(pVM, &Desc, pGdtEntry, sizeof(Desc)); #endif if (VBOX_FAILURE(rc)) { Log(("MMGCRamRead failed with %Vrc\n", rc)); goto failure; } } if (Desc.Gen.u4Type & X86_SEL_TYPE_CONF) { Log(("Conforming code selector\n")); fConforming = true; } /** @todo check descriptor type!! */ dpl = Desc.Gen.u2Dpl; if (!fConforming && dpl < cpl) /* to inner privilege level */ { rc = SELMGetRing1Stack(pVM, &ss_r0, &esp_r0); if (VBOX_FAILURE(rc)) goto failure; Assert((ss_r0 & X86_SEL_RPL) == 1); if ( !esp_r0 || !ss_r0 || (ss_r0 & X86_SEL_RPL) != ((dpl == 0) ? 1 : dpl) || SELMToFlatBySelEx(pVM, fakeflags, ss_r0, (RTGCPTR)esp_r0, NULL, SELMTOFLAT_FLAGS_CPL1, (PRTGCPTR)&pTrapStackGC, NULL) != VINF_SUCCESS ) { Log(("Invalid ring 0 stack %04X:%VRv\n", ss_r0, esp_r0)); goto failure; } } else if (fConforming || dpl == cpl) /* to the same privilege level */ { ss_r0 = pRegFrame->ss; esp_r0 = pRegFrame->esp; if ( eflags.Bits.u1VM /* illegal */ || SELMToFlatBySelEx(pVM, fakeflags, ss_r0, (RTGCPTR)esp_r0, NULL, SELMTOFLAT_FLAGS_CPL1, (PRTGCPTR)&pTrapStackGC, NULL) != VINF_SUCCESS) { AssertMsgFailed(("Invalid stack %04X:%VRv??? (VM=%d)\n", ss_r0, esp_r0, eflags.Bits.u1VM)); goto failure; } } else { Log(("Invalid cpl-dpl combo %d vs %d\n", cpl, dpl)); goto failure; } /* * Build trap stack frame on guest handler's stack */ uint32_t *pTrapStack; #ifdef IN_GC Assert(eflags.Bits.u1VM || (pRegFrame->ss & X86_SEL_RPL) != 0); /* Check maximum amount we need (10 when executing in V86 mode) */ rc = PGMVerifyAccess(pVM, (RTGCUINTPTR)pTrapStackGC - 10*sizeof(uint32_t), 10 * sizeof(uint32_t), X86_PTE_RW); pTrapStack = (uint32_t *)pTrapStackGC; #else Assert(eflags.Bits.u1VM || (pRegFrame->ss & X86_SEL_RPL) == 0 || (pRegFrame->ss & X86_SEL_RPL) == 3); /* Check maximum amount we need (10 when executing in V86 mode) */ if ((pTrapStackGC >> PAGE_SHIFT) != ((pTrapStackGC - 10*sizeof(uint32_t)) >> PAGE_SHIFT)) /* fail if we cross a page boundary */ goto failure; PGMPAGEMAPLOCK PageMappingLock; rc = PGMPhysGCPtr2CCPtr(pVM, pTrapStackGC, (void **)&pTrapStack, &PageMappingLock); if (VBOX_FAILURE(rc)) { AssertRC(rc); goto failure; } #endif if (rc == VINF_SUCCESS) { /** if eflags.Bits.u1VM then push gs, fs, ds, es */ if (eflags.Bits.u1VM) { Log(("TRAP%02X: (VM) Handler %04X:%08X Stack %04X:%08X RPL=%d CR2=%08X\n", iGate, GuestIdte.Gen.u16SegSel, pHandler, ss_r0, esp_r0, (pRegFrame->ss & X86_SEL_RPL), pVM->trpm.s.uActiveCR2)); pTrapStack[--idx] = pRegFrame->gs; pTrapStack[--idx] = pRegFrame->fs; pTrapStack[--idx] = pRegFrame->ds; pTrapStack[--idx] = pRegFrame->es; /* clear ds, es, fs & gs in current context */ pRegFrame->ds = pRegFrame->es = pRegFrame->fs = pRegFrame->gs = 0; } else Log(("TRAP%02X: Handler %04X:%08X Stack %04X:%08X RPL=%d CR2=%08X\n", iGate, GuestIdte.Gen.u16SegSel, pHandler, ss_r0, esp_r0, (pRegFrame->ss & X86_SEL_RPL), pVM->trpm.s.uActiveCR2)); if (!fConforming && dpl < cpl) { if ((pRegFrame->ss & X86_SEL_RPL) == 1 && !eflags.Bits.u1VM) pTrapStack[--idx] = pRegFrame->ss & ~1; /* Mask away traces of raw ring execution (ring 1). */ else pTrapStack[--idx] = pRegFrame->ss; pTrapStack[--idx] = pRegFrame->esp; } /* Note: We use the eflags copy, that includes the virtualized bits! */ /* Note: Not really necessary as we grab include those bits in the trap/irq handler trampoline */ pTrapStack[--idx] = eflags.u32; if ((pRegFrame->cs & X86_SEL_RPL) == 1 && !eflags.Bits.u1VM) pTrapStack[--idx] = pRegFrame->cs & ~1; /* Mask away traces of raw ring execution (ring 1). */ else pTrapStack[--idx] = pRegFrame->cs; if (enmType == TRPM_SOFTWARE_INT) { Assert(opsize); pTrapStack[--idx] = pRegFrame->eip + opsize; /* return address = next instruction */ } else pTrapStack[--idx] = pRegFrame->eip; if (enmError == TRPM_TRAP_HAS_ERRORCODE) { pTrapStack[--idx] = pVM->trpm.s.uActiveErrorCode; } Assert(esp_r0 > -idx*sizeof(uint32_t)); /* Adjust ESP accordingly */ esp_r0 += idx*sizeof(uint32_t); /* Mask away dangerous flags for the trap/interrupt handler. */ eflags.u32 &= ~(X86_EFL_TF | X86_EFL_VM | X86_EFL_RF | X86_EFL_NT); #ifdef DEBUG for (int j=idx;j<0;j++) Log4(("Stack %VRv pos %02d: %08x\n", &pTrapStack[j], j, pTrapStack[j])); Log4(("eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n" "eip=%08x esp=%08x ebp=%08x iopl=%d\n" "cs=%04x ds=%04x es=%04x fs=%04x gs=%04x eflags=%08x\n", pRegFrame->eax, pRegFrame->ebx, pRegFrame->ecx, pRegFrame->edx, pRegFrame->esi, pRegFrame->edi, pRegFrame->eip, pRegFrame->esp, pRegFrame->ebp, eflags.Bits.u2IOPL, (RTSEL)pRegFrame->cs, (RTSEL)pRegFrame->ds, (RTSEL)pRegFrame->es, (RTSEL)pRegFrame->fs, (RTSEL)pRegFrame->gs, eflags.u32)); #endif Log(("PATM Handler %VRv Adjusted stack %08X new EFLAGS=%08X idx=%d dpl=%d cpl=%d\n", pVM->trpm.s.aGuestTrapHandler[iGate], esp_r0, eflags.u32, idx, dpl, cpl)); /* Make sure the internal guest context structure is up-to-date. */ CPUMSetGuestCR2(pVM, pVM->trpm.s.uActiveCR2); #ifdef IN_GC /* Note: shouldn't be necessary */ ASMSetCR2(pVM->trpm.s.uActiveCR2); /* Turn off interrupts for interrupt gates. */ if (GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32) CPUMRawSetEFlags(pVM, pRegFrame, eflags.u32 & ~X86_EFL_IF); /* The virtualized bits must be removed again!! */ eflags.Bits.u1IF = 1; eflags.Bits.u2IOPL = 0; Assert(eflags.Bits.u1IF); Assert(eflags.Bits.u2IOPL == 0); STAM_COUNTER_INC(&pVM->trpm.s.CTXALLSUFF(paStatForwardedIRQ)[iGate]); STAM_PROFILE_ADV_STOP(CTXSUFF(&pVM->trpm.s.StatForwardProf), a); if (iOrgTrap >= 0 && iOrgTrap < (int)RT_ELEMENTS(pVM->trpm.s.aStatGCTraps)) STAM_PROFILE_ADV_STOP(&pVM->trpm.s.aStatGCTraps[iOrgTrap], o); CPUMGCCallGuestTrapHandler(pRegFrame, GuestIdte.Gen.u16SegSel | 1, pVM->trpm.s.aGuestTrapHandler[iGate], eflags.u32, ss_r0, (RTRCPTR)esp_r0); /* does not return */ #else /* Turn off interrupts for interrupt gates. */ if (GuestIdte.Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32) eflags.Bits.u1IF = 0; pRegFrame->eflags.u32 = eflags.u32; pRegFrame->eip = pVM->trpm.s.aGuestTrapHandler[iGate]; pRegFrame->cs = GuestIdte.Gen.u16SegSel; pRegFrame->esp = esp_r0; pRegFrame->ss = ss_r0 & ~X86_SEL_RPL; /* set rpl to ring 0 */ STAM_PROFILE_ADV_STOP(CTXSUFF(&pVM->trpm.s.StatForwardProf), a); PGMPhysReleasePageMappingLock(pVM, &PageMappingLock); return VINF_SUCCESS; #endif } else Log(("TRAP%02X: PGMVerifyAccess %VGv failed with %Vrc -> forward to REM\n", iGate, pTrapStackGC, rc)); } else Log(("SELMValidateAndConvertCSAddr failed with %Vrc\n", rc)); } else Log(("MMRamRead %VGv size %d failed with %Vrc\n", (RTGCUINTPTR)GCPtrIDT + sizeof(VBOXIDTE) * iGate, sizeof(GuestIdte), rc)); } else { Log(("Refused to forward trap: eflags=%08x IF=%d\n", eflags.u32, eflags.Bits.u1IF)); #ifdef VBOX_WITH_STATISTICS if (pVM->trpm.s.aGuestTrapHandler[iGate] == TRPM_INVALID_HANDLER) STAM_COUNTER_INC(&pVM->trpm.s.StatForwardFailNoHandler); else if (PATMIsPatchGCAddr(pVM, (RTRCPTR)pRegFrame->eip)) STAM_COUNTER_INC(&pVM->trpm.s.StatForwardFailPatchAddr); #endif } failure: STAM_COUNTER_INC(&CTXSUFF(pVM->trpm.s.StatForwardFail)); STAM_PROFILE_ADV_STOP(CTXSUFF(&pVM->trpm.s.StatForwardProf), a); Log(("TRAP%02X: forwarding to REM (ss rpl=%d eflags=%08X VMIF=%d handler=%08X\n", iGate, pRegFrame->ss & X86_SEL_RPL, pRegFrame->eflags.u32, PATMAreInterruptsEnabledByCtxCore(pVM, pRegFrame), pVM->trpm.s.aGuestTrapHandler[iGate])); #endif return VINF_EM_RAW_GUEST_TRAP; } #endif /* !IN_RING0 */ /** * Raises a cpu exception which doesn't take an error code. * * This function may or may not dispatch the exception before returning. * * @returns VBox status code fit for scheduling. * @retval VINF_EM_RAW_GUEST_TRAP if the exception was left pending. * @retval VINF_TRPM_XCPT_DISPATCHED if the exception was raised and dispatched for raw-mode execution. * @retval VINF_EM_RESCHEDULE_REM if the exception was dispatched and cannot be executed in raw-mode. * * @param pVM The VM handle. * @param pCtxCore The CPU context core. * @param enmXcpt The exception. */ TRPMDECL(int) TRPMRaiseXcpt(PVM pVM, PCPUMCTXCORE pCtxCore, X86XCPT enmXcpt) { LogFlow(("TRPMRaiseXcptErr: cs:eip=%RTsel:%RX32 enmXcpt=%#x\n", pCtxCore->cs, pCtxCore->eip, enmXcpt)); /** @todo dispatch the trap. */ pVM->trpm.s.uActiveVector = enmXcpt; pVM->trpm.s.enmActiveType = TRPM_TRAP; pVM->trpm.s.uActiveErrorCode = 0xdeadbeef; pVM->trpm.s.uActiveCR2 = 0xdeadface; return VINF_EM_RAW_GUEST_TRAP; } /** * Raises a cpu exception with an errorcode. * * This function may or may not dispatch the exception before returning. * * @returns VBox status code fit for scheduling. * @retval VINF_EM_RAW_GUEST_TRAP if the exception was left pending. * @retval VINF_TRPM_XCPT_DISPATCHED if the exception was raised and dispatched for raw-mode execution. * @retval VINF_EM_RESCHEDULE_REM if the exception was dispatched and cannot be executed in raw-mode. * * @param pVM The VM handle. * @param pCtxCore The CPU context core. * @param enmXcpt The exception. * @param uErr The error code. */ TRPMDECL(int) TRPMRaiseXcptErr(PVM pVM, PCPUMCTXCORE pCtxCore, X86XCPT enmXcpt, uint32_t uErr) { LogFlow(("TRPMRaiseXcptErr: cs:eip=%RTsel:%RX32 enmXcpt=%#x uErr=%RX32\n", pCtxCore->cs, pCtxCore->eip, enmXcpt, uErr)); /** @todo dispatch the trap. */ pVM->trpm.s.uActiveVector = enmXcpt; pVM->trpm.s.enmActiveType = TRPM_TRAP; pVM->trpm.s.uActiveErrorCode = uErr; pVM->trpm.s.uActiveCR2 = 0xdeadface; return VINF_EM_RAW_GUEST_TRAP; } /** * Raises a cpu exception with an errorcode and CR2. * * This function may or may not dispatch the exception before returning. * * @returns VBox status code fit for scheduling. * @retval VINF_EM_RAW_GUEST_TRAP if the exception was left pending. * @retval VINF_TRPM_XCPT_DISPATCHED if the exception was raised and dispatched for raw-mode execution. * @retval VINF_EM_RESCHEDULE_REM if the exception was dispatched and cannot be executed in raw-mode. * * @param pVM The VM handle. * @param pCtxCore The CPU context core. * @param enmXcpt The exception. * @param uErr The error code. * @param uCR2 The CR2 value. */ TRPMDECL(int) TRPMRaiseXcptErrCR2(PVM pVM, PCPUMCTXCORE pCtxCore, X86XCPT enmXcpt, uint32_t uErr, RTGCUINTPTR uCR2) { LogFlow(("TRPMRaiseXcptErr: cs:eip=%RTsel:%RX32 enmXcpt=%#x uErr=%RX32 uCR2=%RGv\n", pCtxCore->cs, pCtxCore->eip, enmXcpt, uErr, uCR2)); /** @todo dispatch the trap. */ pVM->trpm.s.uActiveVector = enmXcpt; pVM->trpm.s.enmActiveType = TRPM_TRAP; pVM->trpm.s.uActiveErrorCode = uErr; pVM->trpm.s.uActiveCR2 = uCR2; return VINF_EM_RAW_GUEST_TRAP; } /** * Clear guest trap/interrupt gate handler * * @returns VBox status code. * @param pVM The VM to operate on. * @param iTrap Interrupt/trap number. */ TRPMDECL(int) trpmClearGuestTrapHandler(PVM pVM, unsigned iTrap) { /* * Validate. */ if (iTrap >= ELEMENTS(pVM->trpm.s.aIdt)) { AssertMsg(iTrap < TRPM_HANDLER_INT_BASE, ("Illegal gate number %d!\n", iTrap)); return VERR_INVALID_PARAMETER; } if (ASMBitTest(&pVM->trpm.s.au32IdtPatched[0], iTrap)) #ifdef IN_RING3 trpmR3ClearPassThroughHandler(pVM, iTrap); #else AssertFailed(); #endif pVM->trpm.s.aGuestTrapHandler[iTrap] = TRPM_INVALID_HANDLER; return VINF_SUCCESS; }