alloc-r0drv.cpp revision 60df112706fc1f8b76ff0a642271071b6c7c1d8c
/* $Id$ */
/** @file
* IPRT - Memory Allocation, Ring-0 Driver.
*/
/*
* Copyright (C) 2006-2010 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* 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.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE 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.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
# include <iprt/asm-amd64-x86.h>
#endif
#include "r0drv/alloc-r0drv.h"
/*******************************************************************************
* Defined Constants And Macros *
*******************************************************************************/
#ifdef RT_STRICT
# define RTR0MEM_STRICT
#endif
#ifdef RTR0MEM_STRICT
# define RTR0MEM_FENCE_EXTRA 16
#else
# define RTR0MEM_FENCE_EXTRA 0
#endif
/*******************************************************************************
* Global Variables *
*******************************************************************************/
#ifdef RTR0MEM_STRICT
/** Fence data. */
{
0x77, 0x88, 0x66, 0x99, 0x55, 0xaa, 0x44, 0xbb,
0x33, 0xcc, 0x22, 0xdd, 0x11, 0xee, 0x00, 0xff
};
#endif
{
}
{
}
{
}
{
if (pHdr)
{
#ifdef RTR0MEM_STRICT
#endif
return pHdr + 1;
}
return NULL;
}
{
if (pHdr)
{
#ifdef RTR0MEM_STRICT
#else
#endif
}
return NULL;
}
{
if (cbUnaligned >= 16)
else
}
{
if (cbUnaligned >= 16)
else
}
{
if (!cbNew)
else if (!pvOld)
else
{
{
return pvOld;
if (pHdrNew)
{
#ifdef RTR0MEM_STRICT
AssertReleaseMsg(!memcmp((uint8_t *)(pHdrOld + 1) + pHdrOld->cbReq, &g_abFence[0], RTR0MEM_FENCE_EXTRA),
("pHdr=%p pvOld=%p cb=%zu cbNew=%zu\n"
"fence: %.*Rhxs\n"
"expected: %.*Rhxs\n",
RTR0MEM_FENCE_EXTRA, &g_abFence[0]));
#endif
return pHdrNew + 1;
}
}
else
AssertMsgFailed(("pHdrOld->u32Magic=%RX32 pvOld=%p cbNew=%#zx\n", pHdrOld->u32Magic, pvOld, cbNew));
}
return NULL;
}
{
if (!pv)
return;
{
#ifdef RTR0MEM_STRICT
("pHdr=%p pv=%p cb=%zu\n"
"fence: %.*Rhxs\n"
"expected: %.*Rhxs\n",
RTR0MEM_FENCE_EXTRA, &g_abFence[0]));
#endif
}
else
}
{
#ifdef RT_OS_SOLARIS /** @todo figure out why */
#else
#endif
if (pHdr)
{
#ifdef RTR0MEM_STRICT
#endif
return pHdr + 1;
}
return NULL;
}
{
if (!pv)
return;
{
#ifdef RTR0MEM_STRICT
("pHdr=%p pv=%p cb=%zu\n"
"fence: %.*Rhxs\n"
"expected: %.*Rhxs\n",
RTR0MEM_FENCE_EXTRA, &g_abFence[0]));
#endif
}
else
}
/**
* Internal IPRT API for allocating special memory.
*
* @returns Pointer to the allocated memory, NULL on failure.
* @param cb The amount of memory to allocate.
* @param fFlags Subset of the RTMEMHDR_FLAG_XXX flags.
* @param pszTag The tag.
*/
{
/** @todo continue later. */
return NULL;
}
/**
* For freeing memory allocated by rtR0MemAllocExTag.
*
* @param pv What to free, NULL is fine.
*/
{
if (!pv)
return;
{
#ifdef RTR0MEM_STRICT
("pHdr=%p pv=%p cb=%zu\n"
"fence: %.*Rhxs\n"
"expected: %.*Rhxs\n",
RTR0MEM_FENCE_EXTRA, &g_abFence[0]));
#endif
}
else
}