VirtualBox

source: vbox/trunk/src/VBox/Runtime/r0drv/darwin/memuserkernel-r0drv-darwin.cpp@ 42586

Last change on this file since 42586 was 41169, checked in by vboxsync, 13 years ago

IPRT,SUPDrv: RTR0MemKernelCopyFrom/To for safe kernel memory access in debug & tracing code..

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  • Property svn:keywords set to Author Date Id Revision
File size: 3.1 KB
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1/* $Id: memuserkernel-r0drv-darwin.cpp 41169 2012-05-04 14:24:42Z vboxsync $ */
2/** @file
3 * IPRT - User & Kernel Memory, Ring-0 Driver, Darwin.
4 */
5
6/*
7 * Copyright (C) 2009 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * The contents of this file may alternatively be used under the terms
18 * of the Common Development and Distribution License Version 1.0
19 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20 * VirtualBox OSE distribution, in which case the provisions of the
21 * CDDL are applicable instead of those of the GPL.
22 *
23 * You may elect to license modified versions of this file under the
24 * terms and conditions of either the GPL or the CDDL or both.
25 */
26
27
28/*******************************************************************************
29* Header Files *
30*******************************************************************************/
31#include "the-darwin-kernel.h"
32#include "internal/iprt.h"
33#include <iprt/mem.h>
34#include <iprt/assert.h>
35
36#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
37# include <iprt/asm-amd64-x86.h>
38#endif
39#include <iprt/err.h>
40
41
42RTR0DECL(int) RTR0MemUserCopyFrom(void *pvDst, RTR3PTR R3PtrSrc, size_t cb)
43{
44 RT_ASSERT_INTS_ON();
45 int rc = copyin((const user_addr_t)R3PtrSrc, pvDst, cb);
46 if (RT_LIKELY(rc == 0))
47 return VINF_SUCCESS;
48 return VERR_ACCESS_DENIED;
49}
50
51
52RTR0DECL(int) RTR0MemUserCopyTo(RTR3PTR R3PtrDst, void const *pvSrc, size_t cb)
53{
54 RT_ASSERT_INTS_ON();
55 int rc = copyout(pvSrc, R3PtrDst, cb);
56 if (RT_LIKELY(rc == 0))
57 return VINF_SUCCESS;
58 return VERR_ACCESS_DENIED;
59}
60
61
62RTR0DECL(bool) RTR0MemUserIsValidAddr(RTR3PTR R3Ptr)
63{
64 /* the commpage is above this. */
65#ifdef RT_ARCH_X86
66 return R3Ptr < VM_MAX_ADDRESS;
67#else
68 return R3Ptr < VM_MAX_PAGE_ADDRESS;
69#endif
70}
71
72
73RTR0DECL(bool) RTR0MemKernelIsValidAddr(void *pv)
74{
75 /* Found no public #define or symbol for checking this, so we'll
76 have to make do with thing found in the debugger and the sources. */
77#ifdef RT_ARCH_X86
78 NOREF(pv);
79 return true; /* Almost anything is a valid kernel address here. */
80
81#elif defined(RT_ARCH_AMD64)
82 return (uintptr_t)pv >= UINT64_C(0xffff800000000000);
83
84#else
85# error "PORTME"
86#endif
87}
88
89
90RTR0DECL(bool) RTR0MemAreKrnlAndUsrDifferent(void)
91{
92 /* As mentioned in RTR0MemKernelIsValidAddr, found no way of checking
93 this at compiler or runtime. */
94#ifdef RT_ARCH_X86
95 return false;
96#else
97 return true;
98#endif
99}
100
101
102RTR0DECL(int) RTR0MemKernelCopyFrom(void *pvDst, void const *pvSrc, size_t cb)
103{
104 return VERR_NOT_SUPPORTED;
105}
106
107
108RTR0DECL(int) RTR0MemKernelCopyTo(void *pvDst, void const *pvSrc, size_t cb)
109{
110 return VERR_NOT_SUPPORTED;
111}
112
113
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