1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/* $Id$ */
/** @file
* BS3Kit - Bs3MemGuardedTestPageAlloc, Bs3MemGuardedTestPageFree
*/
/*
* Copyright (C) 2007-2017 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* 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 *
*********************************************************************************************************************************/
#include "bs3kit-template-header.h"
#include "iprt/asm.h"
#undef Bs3MemGuardedTestPageAllocEx
BS3_CMN_PROTO_STUB(void BS3_FAR *, Bs3MemGuardedTestPageAllocEx,(BS3MEMKIND enmKind, uint64_t fPte))
{
uint8_t BS3_FAR *pb = (uint8_t BS3_FAR *)Bs3MemAlloc(enmKind, X86_PAGE_4K_SIZE * 3);
if (pb)
{
int rc;
Bs3MemSet(pb, 0xcc, X86_PAGE_4K_SIZE);
Bs3MemSet(&pb[X86_PAGE_4K_SIZE], 0x00, X86_PAGE_4K_SIZE);
Bs3MemSet(&pb[X86_PAGE_4K_SIZE*2], 0xaa, X86_PAGE_4K_SIZE);
rc = Bs3PagingProtectPtr(pb, X86_PAGE_4K_SIZE, fPte, UINT64_MAX & ~fPte);
if (RT_SUCCESS(rc))
{
rc = Bs3PagingProtectPtr(&pb[X86_PAGE_4K_SIZE*2], X86_PAGE_4K_SIZE, fPte, UINT64_MAX & ~fPte);
if (RT_SUCCESS(rc))
return pb + X86_PAGE_4K_SIZE;
Bs3TestPrintf("warning: Bs3MemGuardedTestPageAlloc - Tail protect error %d (mode %#x)\n", rc, g_bBs3CurrentMode);
Bs3PagingProtectPtr(pb, X86_PAGE_4K_SIZE, X86_PTE_P, 0);
}
else
Bs3TestPrintf("warning: Bs3MemGuardedTestPageAlloc - Head protect error %d (mode %#x)\n", rc, g_bBs3CurrentMode);
Bs3MemFree(pb, X86_PAGE_4K_SIZE * 3);
}
else
Bs3TestPrintf("warning: Bs3MemGuardedTestPageAlloc - out of memory (mode %#x)\n", g_bBs3CurrentMode);
return NULL;
}
#undef Bs3MemGuardedTestPageAlloc
BS3_CMN_DEF(void BS3_FAR *, Bs3MemGuardedTestPageAlloc,(BS3MEMKIND enmKind))
{
return BS3_CMN_FAR_NM(Bs3MemGuardedTestPageAllocEx)(enmKind, 0);
}
#undef Bs3MemGuardedTestPageFree
BS3_CMN_DEF(void, Bs3MemGuardedTestPageFree,(void BS3_FAR *pvGuardedPage))
{
if (pvGuardedPage)
{
uint8_t BS3_FAR *pbGuardViolation;
uint8_t BS3_FAR *pb = (uint8_t BS3_FAR *)pvGuardedPage - X86_PAGE_4K_SIZE;
Bs3PagingProtectPtr(pb, X86_PAGE_4K_SIZE,
X86_PTE_P | X86_PTE_RW | X86_PTE_US | X86_PTE_A | X86_PTE_D, UINT64_MAX);
Bs3PagingProtectPtr(&pb[X86_PAGE_4K_SIZE*2], X86_PAGE_4K_SIZE,
X86_PTE_P | X86_PTE_RW | X86_PTE_US | X86_PTE_A | X86_PTE_D, UINT64_MAX);
pbGuardViolation = ASMMemFirstMismatchingU8(pb, X86_PAGE_4K_SIZE, 0xcc);
if (pbGuardViolation)
Bs3TestFailedF("Leading guard page touched: byte %#05x is %#04x instead of 0xcc\n",
(unsigned)(uintptr_t)(pbGuardViolation - pb), *pbGuardViolation);
pbGuardViolation = ASMMemFirstMismatchingU8(&pb[X86_PAGE_4K_SIZE*2], X86_PAGE_4K_SIZE, 0xaa);
if (pbGuardViolation)
Bs3TestFailedF("Trailing guard page touched: byte %#05x is %#04x instead of 0xaa\n",
(unsigned)(uintptr_t)(pbGuardViolation - &pb[X86_PAGE_4K_SIZE*2]), *pbGuardViolation);
Bs3MemFree(pb, X86_PAGE_4K_SIZE * 3);
}
}
|
