| 1 | /* $Id: bs3-cpu-basic-2-pf.c32 64704 2016-11-17 22:51:41Z vboxsync $ */
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| 2 | /** @file
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| 3 | * BS3Kit - bs3-cpu-basic-2, 32-bit C code.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2007-2016 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.alldomusa.eu.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #include <bs3kit.h>
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| 32 | #include <iprt/asm-amd64-x86.h>
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| 33 |
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| 34 |
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| 35 | /*********************************************************************************************************************************
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| 36 | * Internal Functions *
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| 37 | *********************************************************************************************************************************/
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| 38 | FNBS3TESTDOMODE bs3CpuBasic2_RaiseXcpt0e_c32;
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| 39 |
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| 40 |
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| 41 |
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| 42 |
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| 43 | BS3_DECL_CALLBACK(uint8_t) bs3CpuBasic2_RaiseXcpt0e_c32(uint8_t bMode)
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| 44 | {
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| 45 | void *pvTestUnaligned;
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| 46 | uint32_t cbTestUnaligned = _8M;
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| 47 | uint32_t cbTest;
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| 48 | uint8_t *pbTest;
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| 49 | uint8_t *pbAlias;
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| 50 | int rc;
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| 51 |
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| 52 | /*
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| 53 | * Allocate a some memory we can play around with, then carve a size aligned
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| 54 | * chunk out of it so we might be able to maybe play with 2/4MB pages too.
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| 55 | */
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| 56 | cbTestUnaligned = _8M * 2;
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| 57 | while ((pvTestUnaligned = Bs3MemAlloc(BS3MEMKIND_FLAT32, cbTestUnaligned)) == NULL)
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| 58 | {
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| 59 | cbTestUnaligned >>= 1;
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| 60 | if (cbTestUnaligned < _8K)
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| 61 | {
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| 62 | Bs3TestFailed("Failed to allocate memory to play around with\n");
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| 63 | return 1;
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| 64 | }
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| 65 | }
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| 66 |
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| 67 | if ((uintptr_t)pvTestUnaligned & (cbTestUnaligned - 1))
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| 68 | {
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| 69 | cbTest = cbTestUnaligned >> 1;
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| 70 | pbTest = (uint8_t *)(((uintptr_t)pvTestUnaligned + cbTest - 1) & ~(cbTest - 1));
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| 71 | }
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| 72 | else
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| 73 | {
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| 74 | pbTest = pvTestUnaligned;
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| 75 | cbTest = cbTestUnaligned;
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| 76 | }
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| 77 |
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| 78 | /*
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| 79 | * Alias this memory far away from where our code and data lives.
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| 80 | */
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| 81 | pbAlias = (uint8_t *)UINT32_C(0xa0000000);
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| 82 | rc = Bs3PagingAlias((uintptr_t)pbAlias, (uintptr_t)pbTest, cbTest, X86_PTE_P | X86_PTE_RW | X86_PTE_US);
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| 83 | if (RT_SUCCESS(rc))
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| 84 | {
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| 85 | void *pvPte = Bs3PagingGetPte((uintptr_t)pbAlias, NULL);
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| 86 | if (pvPte)
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| 87 | {
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| 88 | Bs3TestPrintf("RaiseXcpt0e_c32: bMode=%#x/%#x cbTest=%#x pbTest=%p pbAlias=%p pvPte=%p\n",
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| 89 | bMode, g_bBs3CurrentMode, cbTest, pbTest, pbAlias, pvPte);
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| 90 |
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| 91 | }
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| 92 | else
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| 93 | Bs3TestFailed("Bs3PagingGetPte failed!\n");
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| 94 | Bs3PagingUnalias((uintptr_t)pbAlias, cbTest);
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| 95 | }
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| 96 | else
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| 97 | Bs3TestFailedF("Bs3PagingAlias failed! rc=%d\n", rc);
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| 98 | Bs3MemFree(pvTestUnaligned, cbTestUnaligned);
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| 99 | return 0;
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| 100 | }
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| 101 |
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| 102 |
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