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/* $Id: memuserkernel-r0drv-darwin.cpp $ */
/** @file
* IPRT - User & Kernel Memory, Ring-0 Driver, Darwin.
*/
/*
* 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 "the-darwin-kernel.h"
#include "internal/iprt.h"
#include <iprt/mem.h>
#include <iprt/assert.h>
#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
# include <iprt/asm-amd64-x86.h>
#endif
#include <iprt/errcore.h>
RTR0DECL(int) RTR0MemUserCopyFrom(void *pvDst, RTR3PTR R3PtrSrc, size_t cb)
{
RT_ASSERT_INTS_ON();
IPRT_DARWIN_SAVE_EFL_AC();
int rc = copyin((const user_addr_t)R3PtrSrc, pvDst, cb);
IPRT_DARWIN_RESTORE_EFL_AC();
if (RT_LIKELY(rc == 0))
return VINF_SUCCESS;
return VERR_ACCESS_DENIED;
}
RTR0DECL(int) RTR0MemUserCopyTo(RTR3PTR R3PtrDst, void const *pvSrc, size_t cb)
{
RT_ASSERT_INTS_ON();
IPRT_DARWIN_SAVE_EFL_AC();
int rc = copyout(pvSrc, R3PtrDst, cb);
IPRT_DARWIN_RESTORE_EFL_AC();
if (RT_LIKELY(rc == 0))
return VINF_SUCCESS;
return VERR_ACCESS_DENIED;
}
RTR0DECL(bool) RTR0MemUserIsValidAddr(RTR3PTR R3Ptr)
{
/* the commpage is above this. */
#ifdef RT_ARCH_X86
return R3Ptr < VM_MAX_ADDRESS;
#else
return R3Ptr < VM_MAX_PAGE_ADDRESS;
#endif
}
RTR0DECL(bool) RTR0MemKernelIsValidAddr(void *pv)
{
/* Found no public #define or symbol for checking this, so we'll
have to make do with thing found in the debugger and the sources. */
#ifdef RT_ARCH_X86
NOREF(pv);
return true; /* Almost anything is a valid kernel address here. */
#elif defined(RT_ARCH_AMD64)
return (uintptr_t)pv >= UINT64_C(0xffff800000000000);
#else
# error "PORTME"
#endif
}
RTR0DECL(bool) RTR0MemAreKrnlAndUsrDifferent(void)
{
/* As mentioned in RTR0MemKernelIsValidAddr, found no way of checking
this at compiler or runtime. */
#ifdef RT_ARCH_X86
return false;
#else
return true;
#endif
}
RTR0DECL(int) RTR0MemKernelCopyFrom(void *pvDst, void const *pvSrc, size_t cb)
{
RT_NOREF(pvDst, pvSrc, cb);
return VERR_NOT_SUPPORTED;
}
RTR0DECL(int) RTR0MemKernelCopyTo(void *pvDst, void const *pvSrc, size_t cb)
{
RT_NOREF(pvDst, pvSrc, cb);
return VERR_NOT_SUPPORTED;
}
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