| 1 | /* $Id: CPUMRC.cpp 42774 2012-08-11 20:17:35Z vboxsync $ */
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| 2 | /** @file
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| 3 | * CPUM - Raw-mode Context Code.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2012 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 |
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| 19 | /*******************************************************************************
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| 20 | * Header Files *
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| 21 | *******************************************************************************/
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| 22 | #define LOG_GROUP LOG_GROUP_CPUM
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| 23 | #include <VBox/vmm/cpum.h>
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| 24 | #include <VBox/vmm/vmm.h>
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| 25 | #include <VBox/vmm/patm.h>
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| 26 | #include <VBox/vmm/trpm.h>
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| 27 | #include "CPUMInternal.h"
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| 28 | #include <VBox/vmm/vm.h>
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| 29 | #include <VBox/err.h>
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| 30 | #include <iprt/assert.h>
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| 31 | #include <VBox/log.h>
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| 32 |
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| 33 |
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| 34 | /*******************************************************************************
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| 35 | * Internal Functions *
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| 36 | *******************************************************************************/
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| 37 | RT_C_DECLS_BEGIN /* addressed from asm (not called so no DECLASM). */
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| 38 | DECLCALLBACK(int) cpumRCHandleNPAndGP(PVM pVM, PCPUMCTXCORE pRegFrame, uintptr_t uUser);
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| 39 | RT_C_DECLS_END
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| 40 |
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| 41 |
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| 42 | /**
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| 43 | * Deal with traps occurring during segment loading and IRET when resuming guest
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| 44 | * context execution.
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| 45 | *
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| 46 | * @returns VBox status code.
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| 47 | * @param pVM Pointer to the VM.
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| 48 | * @param pRegFrame The register frame.
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| 49 | * @param uUser User argument. In this case a combination of the
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| 50 | * CPUM_HANDLER_* \#defines.
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| 51 | */
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| 52 | DECLCALLBACK(int) cpumRCHandleNPAndGP(PVM pVM, PCPUMCTXCORE pRegFrame, uintptr_t uUser)
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| 53 | {
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| 54 | Log(("********************************************************\n"));
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| 55 | Log(("cpumRCHandleNPAndGP: eip=%RX32 uUser=%#x\n", pRegFrame->eip, uUser));
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| 56 | Log(("********************************************************\n"));
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| 57 |
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| 58 | /*
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| 59 | * Take action based on what's happened.
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| 60 | */
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| 61 | switch (uUser & CPUM_HANDLER_TYPEMASK)
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| 62 | {
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| 63 | case CPUM_HANDLER_GS:
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| 64 | case CPUM_HANDLER_DS:
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| 65 | case CPUM_HANDLER_ES:
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| 66 | case CPUM_HANDLER_FS:
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| 67 | TRPMGCHyperReturnToHost(pVM, VINF_EM_RAW_STALE_SELECTOR);
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| 68 | break;
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| 69 |
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| 70 | case CPUM_HANDLER_IRET:
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| 71 | TRPMGCHyperReturnToHost(pVM, VINF_EM_RAW_IRET_TRAP);
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| 72 | break;
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| 73 | }
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| 74 |
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| 75 | AssertMsgFailed(("uUser=%#x eip=%#x\n", uUser, pRegFrame->eip));
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| 76 | return VERR_TRPM_DONT_PANIC;
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| 77 | }
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| 78 |
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| 79 |
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| 80 | /**
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| 81 | * Called by TRPM and CPUM assembly code to make sure the guest state is
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| 82 | * ready for execution.
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| 83 | *
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| 84 | * @param pVM The VM handle.
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| 85 | */
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| 86 | DECLASM(void) CPUMRCAssertPreExecutionSanity(PVM pVM)
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| 87 | {
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| 88 | /*
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| 89 | * Check some important assumptions before resuming guest execution.
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| 90 | */
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| 91 | PVMCPU pVCpu = VMMGetCpu0(pVM);
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| 92 | PCCPUMCTX pCtx = &pVCpu->cpum.s.Guest;
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| 93 | uint8_t const uRawCpl = CPUMGetGuestCPL(pVCpu);
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| 94 | uint32_t const u32EFlags = CPUMRawGetEFlags(pVCpu);
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| 95 | bool const fPatch = PATMIsPatchGCAddr(pVM, pCtx->eip);
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| 96 | AssertMsg(pCtx->eflags.Bits.u1IF, ("cs:eip=%04x:%08x ss:esp=%04x:%08x cpl=%u raw/efl=%#x/%#x%s\n", pCtx->cs.Sel, pCtx->eip, pCtx->ss.Sel, pCtx->esp, uRawCpl, u32EFlags, pCtx->eflags.u, fPatch ? " patch" : ""));
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| 97 | AssertMsg(pCtx->eflags.Bits.u2IOPL < RT_MAX(uRawCpl, 1U),
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| 98 | ("cs:eip=%04x:%08x ss:esp=%04x:%08x cpl=%u raw/efl=%#x/%#x%s\n", pCtx->cs.Sel, pCtx->eip, pCtx->ss.Sel, pCtx->esp, uRawCpl, u32EFlags, pCtx->eflags.u, fPatch ? " patch" : ""));
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| 99 | if (!(u32EFlags & X86_EFL_VM))
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| 100 | {
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| 101 | AssertMsg((u32EFlags & X86_EFL_IF) || fPatch,("cs:eip=%04x:%08x ss:esp=%04x:%08x cpl=%u raw/efl=%#x/%#x%s\n", pCtx->cs.Sel, pCtx->eip, pCtx->ss.Sel, pCtx->esp, uRawCpl, u32EFlags, pCtx->eflags.u, fPatch ? " patch" : ""));
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| 102 | AssertMsg((pCtx->cs.Sel & X86_SEL_RPL) > 0, ("cs:eip=%04x:%08x ss:esp=%04x:%08x cpl=%u raw/efl=%#x/%#x%s\n", pCtx->cs.Sel, pCtx->eip, pCtx->ss.Sel, pCtx->esp, uRawCpl, u32EFlags, pCtx->eflags.u, fPatch ? " patch" : ""));
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| 103 | AssertMsg((pCtx->ss.Sel & X86_SEL_RPL) > 0, ("cs:eip=%04x:%08x ss:esp=%04x:%08x cpl=%u raw/efl=%#x/%#x%s\n", pCtx->cs.Sel, pCtx->eip, pCtx->ss.Sel, pCtx->esp, uRawCpl, u32EFlags, pCtx->eflags.u, fPatch ? " patch" : ""));
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| 104 | }
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| 105 | AssertMsg(CPUMIsGuestInRawMode(pVCpu), ("cs:eip=%04x:%08x ss:esp=%04x:%08x cpl=%u raw/efl=%#x/%#x%s\n", pCtx->cs.Sel, pCtx->eip, pCtx->ss.Sel, pCtx->esp, uRawCpl, u32EFlags, pCtx->eflags.u, fPatch ? " patch" : ""));
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| 106 | //Log2(("cs:eip=%04x:%08x ss:esp=%04x:%08x cpl=%u raw/efl=%#x/%#x%s\n", pCtx->cs.Sel, pCtx->eip, pCtx->ss.Sel, pCtx->esp, uRawCpl, u32EFlags, pCtx->eflags.u, fPatch ? " patch" : ""));
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| 107 | }
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