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/* $Id: tstRTR0MemUserKernel.cpp $ */
/** @file
* IPRT R0 Testcase - Thread Preemption.
*/
/*
* 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>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/mem.h>
#include <iprt/errcore.h>
#include <iprt/param.h>
#include <iprt/time.h>
#include <iprt/string.h>
#include <VBox/sup.h>
#include "tstRTR0MemUserKernel.h"
/**
* Service request callback function.
*
* @returns VBox status code.
* @param pSession The caller's session.
* @param u64Arg 64-bit integer argument.
* @param pReqHdr The request header. Input / Output. Optional.
*/
DECLEXPORT(int) TSTRTR0MemUserKernelSrvReqHandler(PSUPDRVSESSION pSession, uint32_t uOperation,
uint64_t u64Arg, PSUPR0SERVICEREQHDR pReqHdr)
{
NOREF(pSession);
if (!RT_VALID_PTR(pReqHdr))
return VERR_INVALID_PARAMETER;
char *pszErr = (char *)(pReqHdr + 1);
size_t cchErr = pReqHdr->cbReq - sizeof(*pReqHdr);
if (cchErr < 32 || cchErr >= 0x10000)
return VERR_INVALID_PARAMETER;
*pszErr = '\0';
/*
* R3Ptr is valid and good for up to a page. The page before
* and after are both invalid. Or, it's a kernel page.
*/
RTR3PTR R3Ptr = (RTR3PTR)u64Arg;
if (R3Ptr != u64Arg)
return VERR_INVALID_PARAMETER;
/*
* Allocate a kernel buffer.
*/
uint8_t *pbKrnlBuf = (uint8_t *)RTMemAlloc(PAGE_SIZE * 2);
if (!pbKrnlBuf)
{
RTStrPrintf(pszErr, cchErr, "!no memory for kernel buffers");
return VINF_SUCCESS;
}
/*
* The big switch.
*/
switch (uOperation)
{
case TSTRTR0MEMUSERKERNEL_SANITY_OK:
break;
case TSTRTR0MEMUSERKERNEL_SANITY_FAILURE:
RTStrPrintf(pszErr, cchErr, "!42failure42%1024s", "");
break;
case TSTRTR0MEMUSERKERNEL_BASIC:
{
int rc = RTR0MemUserCopyFrom(pbKrnlBuf, R3Ptr, PAGE_SIZE);
if (rc == VINF_SUCCESS)
{
rc = RTR0MemUserCopyTo(R3Ptr, pbKrnlBuf, PAGE_SIZE);
if (rc == VINF_SUCCESS)
{
if (RTR0MemUserIsValidAddr(R3Ptr))
{
if (RTR0MemKernelIsValidAddr(pbKrnlBuf))
{
if (RTR0MemAreKrnlAndUsrDifferent())
{
RTStrPrintf(pszErr, cchErr, "RTR0MemAreKrnlAndUsrDifferent returns true");
if (!RTR0MemUserIsValidAddr((uintptr_t)pbKrnlBuf))
{
if (!RTR0MemKernelIsValidAddr((void *)R3Ptr))
{
/* done */
}
else
RTStrPrintf(pszErr, cchErr, "! #5 - RTR0MemKernelIsValidAddr -> true, expected false");
}
else
RTStrPrintf(pszErr, cchErr, "! #5 - RTR0MemUserIsValidAddr -> true, expected false");
}
else
RTStrPrintf(pszErr, cchErr, "RTR0MemAreKrnlAndUsrDifferent returns false");
}
else
RTStrPrintf(pszErr, cchErr, "! #4 - RTR0MemKernelIsValidAddr -> false, expected true");
}
else
RTStrPrintf(pszErr, cchErr, "! #3 - RTR0MemUserIsValidAddr -> false, expected true");
}
else
RTStrPrintf(pszErr, cchErr, "! #2 - RTR0MemUserCopyTo -> %Rrc expected %Rrc", rc, VINF_SUCCESS);
}
else
RTStrPrintf(pszErr, cchErr, "! #1 - RTR0MemUserCopyFrom -> %Rrc expected %Rrc", rc, VINF_SUCCESS);
break;
}
#define TEST_OFF_SIZE(off, size, rcExpect) \
if (1) \
{ \
int rc = RTR0MemUserCopyFrom(pbKrnlBuf, R3Ptr + (off), (size)); \
if (rc != (rcExpect)) \
{ \
RTStrPrintf(pszErr, cchErr, "!RTR0MemUserCopyFrom(, +%#x, %#x) -> %Rrc, expected %Rrc", \
(off), (size), rc, (rcExpect)); \
break; \
} \
rc = RTR0MemUserCopyTo(R3Ptr + (off), pbKrnlBuf, (size)); \
if (rc != (rcExpect)) \
{ \
RTStrPrintf(pszErr, cchErr, "!RTR0MemUserCopyTo(+%#x,, %#x) -> %Rrc, expected %Rrc", \
(off), (size), rc, (rcExpect)); \
break; \
} \
} else do {} while (0)
case TSTRTR0MEMUSERKERNEL_GOOD:
{
for (unsigned off = 0; off < 16 && !*pszErr; off++)
for (unsigned cb = 0; cb < PAGE_SIZE - 16; cb++)
TEST_OFF_SIZE(off, cb, VINF_SUCCESS);
break;
}
case TSTRTR0MEMUSERKERNEL_BAD:
{
for (unsigned off = 0; off < 16 && !*pszErr; off++)
for (unsigned cb = 0; cb < PAGE_SIZE - 16; cb++)
TEST_OFF_SIZE(off, cb, cb > 0 ? VERR_ACCESS_DENIED : VINF_SUCCESS);
break;
}
case TSTRTR0MEMUSERKERNEL_INVALID_ADDRESS:
{
if ( !RTR0MemUserIsValidAddr(R3Ptr)
&& RTR0MemKernelIsValidAddr((void *)R3Ptr))
{
for (unsigned off = 0; off < 16 && !*pszErr; off++)
for (unsigned cb = 0; cb < PAGE_SIZE - 16; cb++)
TEST_OFF_SIZE(off, cb, cb > 0 ? VERR_ACCESS_DENIED : VINF_SUCCESS); /* ... */
}
else
RTStrPrintf(pszErr, cchErr, "RTR0MemUserIsValidAddr returns true");
break;
}
default:
RTStrPrintf(pszErr, cchErr, "!Unknown test #%d", uOperation);
break;
}
/* The error indicator is the '!' in the message buffer. */
RTMemFree(pbKrnlBuf);
return VINF_SUCCESS;
}
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