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/* $Id: DBGFCpu.cpp $ */
/** @file
* DBGF - Debugger Facility, CPU State Accessors.
*/
/*
* Copyright (C) 2009-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_DBGF
#define VMCPU_INCL_CPUM_GST_CTX /* For CPUM_IMPORT_EXTRN_RET(). */
#include <VBox/vmm/dbgf.h>
#include <VBox/vmm/cpum.h>
#include "DBGFInternal.h"
#include <VBox/vmm/vm.h>
#include <VBox/vmm/uvm.h>
#include <iprt/errcore.h>
#include <VBox/log.h>
#include <VBox/param.h>
#include <iprt/assert.h>
/**
* Wrapper around CPUMGetGuestMode.
*
* @returns VINF_SUCCESS.
* @param pVM The cross context VM structure.
* @param idCpu The current CPU ID.
* @param penmMode Where to return the mode.
*/
static DECLCALLBACK(int) dbgfR3CpuGetMode(PVM pVM, VMCPUID idCpu, CPUMMODE *penmMode)
{
Assert(idCpu == VMMGetCpuId(pVM));
PVMCPU pVCpu = VMMGetCpuById(pVM, idCpu);
CPUM_IMPORT_EXTRN_RET(pVCpu, CPUMCTX_EXTRN_CR0 | CPUMCTX_EXTRN_EFER);
*penmMode = CPUMGetGuestMode(pVCpu);
return VINF_SUCCESS;
}
/**
* Get the current CPU mode.
*
* @returns The CPU mode on success, CPUMMODE_INVALID on failure.
* @param pUVM The user mode VM handle.
* @param idCpu The target CPU ID.
*/
VMMR3DECL(CPUMMODE) DBGFR3CpuGetMode(PUVM pUVM, VMCPUID idCpu)
{
UVM_ASSERT_VALID_EXT_RETURN(pUVM, CPUMMODE_INVALID);
VM_ASSERT_VALID_EXT_RETURN(pUVM->pVM, CPUMMODE_INVALID);
AssertReturn(idCpu < pUVM->pVM->cCpus, CPUMMODE_INVALID);
CPUMMODE enmMode;
int rc = VMR3ReqPriorityCallWaitU(pUVM, idCpu, (PFNRT)dbgfR3CpuGetMode, 3, pUVM->pVM, idCpu, &enmMode);
if (RT_FAILURE(rc))
return CPUMMODE_INVALID;
return enmMode;
}
/**
* Wrapper around CPUMIsGuestIn64BitCode.
*
* @returns VINF_SUCCESS.
* @param pVM The cross context VM structure.
* @param idCpu The current CPU ID.
* @param pfIn64BitCode Where to return the result.
*/
static DECLCALLBACK(int) dbgfR3CpuIn64BitCode(PVM pVM, VMCPUID idCpu, bool *pfIn64BitCode)
{
Assert(idCpu == VMMGetCpuId(pVM));
PVMCPU pVCpu = VMMGetCpuById(pVM, idCpu);
CPUM_IMPORT_EXTRN_RET(pVCpu, CPUMCTX_EXTRN_CS | CPUMCTX_EXTRN_EFER);
*pfIn64BitCode = CPUMIsGuestIn64BitCode(pVCpu);
return VINF_SUCCESS;
}
/**
* Checks if the given CPU is executing 64-bit code or not.
*
* @returns true / false accordingly.
* @param pUVM The user mode VM handle.
* @param idCpu The target CPU ID.
*/
VMMR3DECL(bool) DBGFR3CpuIsIn64BitCode(PUVM pUVM, VMCPUID idCpu)
{
UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
VM_ASSERT_VALID_EXT_RETURN(pUVM->pVM, false);
AssertReturn(idCpu < pUVM->pVM->cCpus, false);
bool fIn64BitCode;
int rc = VMR3ReqPriorityCallWaitU(pUVM, idCpu, (PFNRT)dbgfR3CpuIn64BitCode, 3, pUVM->pVM, idCpu, &fIn64BitCode);
if (RT_FAILURE(rc))
return false;
return fIn64BitCode;
}
/**
* Wrapper around CPUMIsGuestInV86Code.
*
* @returns VINF_SUCCESS.
* @param pVM The cross context VM structure.
* @param idCpu The current CPU ID.
* @param pfInV86Code Where to return the result.
*/
static DECLCALLBACK(int) dbgfR3CpuInV86Code(PVM pVM, VMCPUID idCpu, bool *pfInV86Code)
{
Assert(idCpu == VMMGetCpuId(pVM));
PVMCPU pVCpu = VMMGetCpuById(pVM, idCpu);
CPUM_IMPORT_EXTRN_RET(pVCpu, CPUMCTX_EXTRN_RFLAGS);
*pfInV86Code = CPUMIsGuestInV86ModeEx(CPUMQueryGuestCtxPtr(pVCpu));
return VINF_SUCCESS;
}
/**
* Checks if the given CPU is executing V8086 code or not.
*
* @returns true / false accordingly.
* @param pUVM The user mode VM handle.
* @param idCpu The target CPU ID.
*/
VMMR3DECL(bool) DBGFR3CpuIsInV86Code(PUVM pUVM, VMCPUID idCpu)
{
UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
VM_ASSERT_VALID_EXT_RETURN(pUVM->pVM, false);
AssertReturn(idCpu < pUVM->pVM->cCpus, false);
bool fInV86Code;
int rc = VMR3ReqPriorityCallWaitU(pUVM, idCpu, (PFNRT)dbgfR3CpuInV86Code, 3, pUVM->pVM, idCpu, &fInV86Code);
if (RT_FAILURE(rc))
return false;
return fInV86Code;
}
/**
* Get the number of CPUs (or threads if you insist).
*
* @returns The number of CPUs
* @param pUVM The user mode VM handle.
*/
VMMR3DECL(VMCPUID) DBGFR3CpuGetCount(PUVM pUVM)
{
UVM_ASSERT_VALID_EXT_RETURN(pUVM, 1);
return pUVM->cCpus;
}
/**
* Returns the state of the given CPU as a human readable string.
*
* @returns Pointer to the human readable CPU state string.
* @param pUVM The user mode VM handle.
* @param idCpu The target CPU ID.
*/
VMMR3DECL(const char *) DBGFR3CpuGetState(PUVM pUVM, VMCPUID idCpu)
{
UVM_ASSERT_VALID_EXT_RETURN(pUVM, NULL);
VM_ASSERT_VALID_EXT_RETURN(pUVM->pVM, NULL);
AssertReturn(idCpu < pUVM->pVM->cCpus, NULL);
PVMCPU pVCpu = VMMGetCpuById(pUVM->pVM, idCpu);
VMCPUSTATE enmCpuState = (VMCPUSTATE)ASMAtomicReadU32((volatile uint32_t *)&pVCpu->enmState);
switch (enmCpuState)
{
case VMCPUSTATE_INVALID: return "<INVALID>";
case VMCPUSTATE_STOPPED: return "Stopped";
case VMCPUSTATE_STARTED: return "Started";
case VMCPUSTATE_STARTED_HM: return "Started (HM)";
case VMCPUSTATE_STARTED_EXEC: return "Started (Exec)";
case VMCPUSTATE_STARTED_EXEC_NEM: return "Started (Exec NEM)";
case VMCPUSTATE_STARTED_EXEC_NEM_WAIT: return "Started (Exec NEM Wait)";
case VMCPUSTATE_STARTED_EXEC_NEM_CANCELED: return "Started (Exec NEM Canceled)";
case VMCPUSTATE_STARTED_HALTED: return "Started (Halted)";
case VMCPUSTATE_END: return "END";
default: break;
}
AssertMsgFailedReturn(("Unknown CPU state %u\n", enmCpuState), "<UNKNOWN>");
}
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