VirtualBox

source: vbox/trunk/src/VBox/Runtime/r0drv/darwin/memuserkernel-r0drv-darwin.cpp@ 34536

Last change on this file since 34536 was 29255, checked in by vboxsync, 15 years ago

darwin+asm.h build fixes.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 2.8 KB
Line 
1/* $Id: memuserkernel-r0drv-darwin.cpp 29255 2010-05-09 18:11:24Z 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
35#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
36# include <iprt/asm-amd64-x86.h>
37#endif
38#include <iprt/err.h>
39
40
41RTR0DECL(int) RTR0MemUserCopyFrom(void *pvDst, RTR3PTR R3PtrSrc, size_t cb)
42{
43 RT_ASSERT_INTS_ON();
44 int rc = copyin((const user_addr_t)R3PtrSrc, pvDst, cb);
45 if (RT_LIKELY(rc == 0))
46 return VINF_SUCCESS;
47 return VERR_ACCESS_DENIED;
48}
49
50
51RTR0DECL(int) RTR0MemUserCopyTo(RTR3PTR R3PtrDst, void const *pvSrc, size_t cb)
52{
53 RT_ASSERT_INTS_ON();
54 int rc = copyout(pvSrc, R3PtrDst, cb);
55 if (RT_LIKELY(rc == 0))
56 return VINF_SUCCESS;
57 return VERR_ACCESS_DENIED;
58}
59
60
61RTR0DECL(bool) RTR0MemUserIsValidAddr(RTR3PTR R3Ptr)
62{
63 /* the commpage is above this. */
64#ifdef RT_ARCH_X86
65 return R3Ptr < VM_MAX_ADDRESS;
66#else
67 return R3Ptr < VM_MAX_PAGE_ADDRESS;
68#endif
69}
70
71
72RTR0DECL(bool) RTR0MemKernelIsValidAddr(void *pv)
73{
74 /* Found no public #define or symbol for checking this, so we'll
75 have to make do with thing found in the debugger and the sources. */
76#ifdef RT_ARCH_X86
77 NOREF(pv);
78 return true; /* Almost anything is a valid kernel address here. */
79
80#elif defined(RT_ARCH_AMD64)
81 return (uintptr_t)pv >= UINT64_C(0xffff800000000000);
82
83#else
84# error "PORTME"
85#endif
86}
87
88
89RTR0DECL(bool) RTR0MemAreKrnlAndUsrDifferent(void)
90{
91 /* As mentioned in RTR0MemKernelIsValidAddr, found no way of checking
92 this at compiler or runtime. */
93#ifdef RT_ARCH_X86
94 return false;
95#else
96 return true;
97#endif
98}
99
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