/**
 * Worker for DBGFR3SelQueryInfo that calls into SELM.
 */
static DECLCALLBACK(int) dbgfR3SelQueryInfo(PVM pVM, VMCPUID idCpu, RTSEL Sel, uint32_t fFlags, PDBGFSELINFO pSelInfo)
{
    /*
     * Make the query.
     */
    int rc;
    if (!(fFlags & DBGFSELQI_FLAGS_DT_SHADOW))
    {
        PVMCPU pVCpu = VMMGetCpuById(pVM, idCpu);
        VMCPU_ASSERT_EMT(pVCpu);
        rc = SELMR3GetSelectorInfo(pVM, pVCpu, Sel, pSelInfo);

        /*
         * 64-bit mode HACKS for making data and stack selectors wide open when
         * queried. This is voodoo magic.
         */
        if (fFlags & DBGFSELQI_FLAGS_DT_ADJ_64BIT_MODE)
        {
            /* Expand 64-bit data and stack selectors. The check is a bit bogus... */
            if (    RT_SUCCESS(rc)
                &&  (pSelInfo->fFlags & (  DBGFSELINFO_FLAGS_LONG_MODE | DBGFSELINFO_FLAGS_REAL_MODE | DBGFSELINFO_FLAGS_PROT_MODE
                                         | DBGFSELINFO_FLAGS_GATE      | DBGFSELINFO_FLAGS_HYPER
                                         | DBGFSELINFO_FLAGS_INVALID   | DBGFSELINFO_FLAGS_NOT_PRESENT))
                     == DBGFSELINFO_FLAGS_LONG_MODE
                &&  pSelInfo->cbLimit != ~(RTGCPTR)0
                &&  CPUMIsGuestIn64BitCode(pVCpu, CPUMGetGuestCtxCore(pVCpu)) )
            {
                pSelInfo->GCPtrBase = 0;
                pSelInfo->cbLimit   = ~(RTGCPTR)0;
            }
            else if (   Sel == 0
                     && CPUMIsGuestIn64BitCode(pVCpu, CPUMGetGuestCtxCore(pVCpu)))
            {
                pSelInfo->GCPtrBase = 0;
                pSelInfo->cbLimit   = ~(RTGCPTR)0;
                pSelInfo->Sel       = 0;
                pSelInfo->SelGate   = 0;
                pSelInfo->fFlags    = DBGFSELINFO_FLAGS_LONG_MODE;
                pSelInfo->u.Raw64.Gen.u1Present  = 1;
                pSelInfo->u.Raw64.Gen.u1Long     = 1;
                pSelInfo->u.Raw64.Gen.u1DescType = 1;
                rc = VINF_SUCCESS;
            }
        }
    }
    else
    {
        if (HWACCMIsEnabled(pVM))
            rc = VERR_INVALID_STATE;
        else
            rc = SELMR3GetShadowSelectorInfo(pVM, Sel, pSelInfo);
    }
    return rc;
}
Beispiel #2
0
/**
 * Common worker for DBGFR3StackWalkBeginGuestEx, DBGFR3StackWalkBeginHyperEx,
 * DBGFR3StackWalkBeginGuest and DBGFR3StackWalkBeginHyper.
 */
static int dbgfR3StackWalkBeginCommon(PUVM pUVM,
                                      VMCPUID idCpu,
                                      DBGFCODETYPE enmCodeType,
                                      PCDBGFADDRESS pAddrFrame,
                                      PCDBGFADDRESS pAddrStack,
                                      PCDBGFADDRESS pAddrPC,
                                      DBGFRETURNTYPE enmReturnType,
                                      PCDBGFSTACKFRAME *ppFirstFrame)
{
    /*
     * Validate parameters.
     */
    *ppFirstFrame = NULL;
    UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
    PVM pVM = pUVM->pVM;
    VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
    AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_CPU_ID);
    if (pAddrFrame)
        AssertReturn(DBGFR3AddrIsValid(pUVM, pAddrFrame), VERR_INVALID_PARAMETER);
    if (pAddrStack)
        AssertReturn(DBGFR3AddrIsValid(pUVM, pAddrStack), VERR_INVALID_PARAMETER);
    if (pAddrPC)
        AssertReturn(DBGFR3AddrIsValid(pUVM, pAddrPC), VERR_INVALID_PARAMETER);
    AssertReturn(enmReturnType >= DBGFRETURNTYPE_INVALID && enmReturnType < DBGFRETURNTYPE_END, VERR_INVALID_PARAMETER);

    /*
     * Get the CPUM context pointer and pass it on the specified EMT.
     */
    RTDBGAS         hAs;
    PCCPUMCTXCORE   pCtxCore;
    switch (enmCodeType)
    {
        case DBGFCODETYPE_GUEST:
            pCtxCore = CPUMGetGuestCtxCore(VMMGetCpuById(pVM, idCpu));
            hAs = DBGF_AS_GLOBAL;
            break;
        case DBGFCODETYPE_HYPER:
            pCtxCore = CPUMGetHyperCtxCore(VMMGetCpuById(pVM, idCpu));
            hAs = DBGF_AS_RC_AND_GC_GLOBAL;
            break;
        case DBGFCODETYPE_RING0:
            pCtxCore = NULL;    /* No valid context present. */
            hAs = DBGF_AS_R0;
            break;
        default:
            AssertFailedReturn(VERR_INVALID_PARAMETER);
    }
    return VMR3ReqPriorityCallWaitU(pUVM, idCpu, (PFNRT)dbgfR3StackWalkCtxFull, 10,
                                    pUVM, idCpu, pCtxCore, hAs, enmCodeType,
                                    pAddrFrame, pAddrStack, pAddrPC, enmReturnType, ppFirstFrame);
}