VirtualBox

source: vbox/trunk/src/VBox/Runtime/r0drv/darwin/memuserkernel-r0drv-darwin.cpp@ 61572

Last change on this file since 61572 was 57358, checked in by vboxsync, 9 years ago

*: scm cleanup run.

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  • Property svn:keywords set to Author Date Id Revision
File size: 3.3 KB
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1/* $Id: memuserkernel-r0drv-darwin.cpp 57358 2015-08-14 15:16:38Z vboxsync $ */
2/** @file
3 * IPRT - User & Kernel Memory, Ring-0 Driver, Darwin.
4 */
5
6/*
7 * Copyright (C) 2009-2015 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 IPRT_DARWIN_SAVE_EFL_AC();
46 int rc = copyin((const user_addr_t)R3PtrSrc, pvDst, cb);
47 IPRT_DARWIN_RESTORE_EFL_AC();
48 if (RT_LIKELY(rc == 0))
49 return VINF_SUCCESS;
50 return VERR_ACCESS_DENIED;
51}
52
53
54RTR0DECL(int) RTR0MemUserCopyTo(RTR3PTR R3PtrDst, void const *pvSrc, size_t cb)
55{
56 RT_ASSERT_INTS_ON();
57 IPRT_DARWIN_SAVE_EFL_AC();
58 int rc = copyout(pvSrc, R3PtrDst, cb);
59 IPRT_DARWIN_RESTORE_EFL_AC();
60 if (RT_LIKELY(rc == 0))
61 return VINF_SUCCESS;
62 return VERR_ACCESS_DENIED;
63}
64
65
66RTR0DECL(bool) RTR0MemUserIsValidAddr(RTR3PTR R3Ptr)
67{
68 /* the commpage is above this. */
69#ifdef RT_ARCH_X86
70 return R3Ptr < VM_MAX_ADDRESS;
71#else
72 return R3Ptr < VM_MAX_PAGE_ADDRESS;
73#endif
74}
75
76
77RTR0DECL(bool) RTR0MemKernelIsValidAddr(void *pv)
78{
79 /* Found no public #define or symbol for checking this, so we'll
80 have to make do with thing found in the debugger and the sources. */
81#ifdef RT_ARCH_X86
82 NOREF(pv);
83 return true; /* Almost anything is a valid kernel address here. */
84
85#elif defined(RT_ARCH_AMD64)
86 return (uintptr_t)pv >= UINT64_C(0xffff800000000000);
87
88#else
89# error "PORTME"
90#endif
91}
92
93
94RTR0DECL(bool) RTR0MemAreKrnlAndUsrDifferent(void)
95{
96 /* As mentioned in RTR0MemKernelIsValidAddr, found no way of checking
97 this at compiler or runtime. */
98#ifdef RT_ARCH_X86
99 return false;
100#else
101 return true;
102#endif
103}
104
105
106RTR0DECL(int) RTR0MemKernelCopyFrom(void *pvDst, void const *pvSrc, size_t cb)
107{
108 return VERR_NOT_SUPPORTED;
109}
110
111
112RTR0DECL(int) RTR0MemKernelCopyTo(void *pvDst, void const *pvSrc, size_t cb)
113{
114 return VERR_NOT_SUPPORTED;
115}
116
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