| 1 | /* $Id: bs3-cmn-Trap32Init.c 82968 2020-02-04 10:35:17Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * BS3Kit - Bs3Trap32Init
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2007-2020 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 "bs3kit-template-header.h"
|
|---|
| 32 |
|
|---|
| 33 |
|
|---|
| 34 | /*********************************************************************************************************************************
|
|---|
| 35 | * External Symbols *
|
|---|
| 36 | *********************************************************************************************************************************/
|
|---|
| 37 | #define g_Bs3Trap32DoubleFaultHandlerFlatAddr BS3_DATA_NM(g_Bs3Trap32DoubleFaultHandlerFlatAddr)
|
|---|
| 38 | extern uint32_t g_Bs3Trap32DoubleFaultHandlerFlatAddr;
|
|---|
| 39 |
|
|---|
| 40 |
|
|---|
| 41 | #undef Bs3Trap32Init
|
|---|
| 42 | BS3_CMN_DEF(void, Bs3Trap32Init,(void))
|
|---|
| 43 | {
|
|---|
| 44 | X86TSS32 BS3_FAR *pTss;
|
|---|
| 45 | unsigned iIdt;
|
|---|
| 46 |
|
|---|
| 47 | /*
|
|---|
| 48 | * IDT entries, except the system call gate.
|
|---|
| 49 | */
|
|---|
| 50 | for (iIdt = 0; iIdt < BS3_TRAP_SYSCALL; iIdt++)
|
|---|
| 51 | Bs3Trap32SetGate(iIdt, X86_SEL_TYPE_SYS_386_INT_GATE, 0 /*bDpl*/,
|
|---|
| 52 | BS3_SEL_R0_CS32, g_Bs3Trap32GenericEntriesFlatAddr + iIdt * 10, 0 /*cParams*/);
|
|---|
| 53 | for (iIdt = BS3_TRAP_SYSCALL + 1; iIdt < 256; iIdt++)
|
|---|
| 54 | Bs3Trap32SetGate(iIdt, X86_SEL_TYPE_SYS_386_INT_GATE, 0 /*bDpl*/,
|
|---|
| 55 | BS3_SEL_R0_CS32, g_Bs3Trap32GenericEntriesFlatAddr + iIdt * 10, 0 /*cParams*/);
|
|---|
| 56 |
|
|---|
| 57 | /*
|
|---|
| 58 | * Initialize the normal TSS so we can do ring transitions via the IDT.
|
|---|
| 59 | */
|
|---|
| 60 | pTss = &Bs3Tss32;
|
|---|
| 61 | Bs3MemZero(pTss, sizeof(*pTss));
|
|---|
| 62 | pTss->esp0 = BS3_ADDR_STACK_R0;
|
|---|
| 63 | pTss->ss0 = BS3_SEL_R0_SS32;
|
|---|
| 64 | pTss->esp1 = BS3_ADDR_STACK_R1;
|
|---|
| 65 | pTss->ss1 = BS3_SEL_R1_SS32 | 1;
|
|---|
| 66 | pTss->esp2 = BS3_ADDR_STACK_R2;
|
|---|
| 67 | pTss->ss2 = BS3_SEL_R2_SS32 | 2;
|
|---|
| 68 |
|
|---|
| 69 | /*
|
|---|
| 70 | * Initialize the double fault TSS.
|
|---|
| 71 | * cr3 is filled in by switcher code, when needed.
|
|---|
| 72 | */
|
|---|
| 73 | pTss = &Bs3Tss32DoubleFault;
|
|---|
| 74 | Bs3MemZero(pTss, sizeof(*pTss));
|
|---|
| 75 | pTss->esp0 = BS3_ADDR_STACK_R0;
|
|---|
| 76 | pTss->ss0 = BS3_SEL_R0_SS32;
|
|---|
| 77 | pTss->esp1 = BS3_ADDR_STACK_R1;
|
|---|
| 78 | pTss->ss1 = BS3_SEL_R1_SS32 | 1;
|
|---|
| 79 | pTss->esp2 = BS3_ADDR_STACK_R2;
|
|---|
| 80 | pTss->ss2 = BS3_SEL_R2_SS32 | 2;
|
|---|
| 81 | pTss->eip = g_Bs3Trap32DoubleFaultHandlerFlatAddr;
|
|---|
| 82 | pTss->eflags = X86_EFL_1;
|
|---|
| 83 | pTss->esp = BS3_ADDR_STACK_R0_IST1;
|
|---|
| 84 | pTss->es = BS3_SEL_R0_DS32;
|
|---|
| 85 | pTss->ds = BS3_SEL_R0_DS32;
|
|---|
| 86 | pTss->cs = BS3_SEL_R0_CS32;
|
|---|
| 87 | pTss->ss = BS3_SEL_R0_SS32;
|
|---|
| 88 |
|
|---|
| 89 | Bs3Trap32SetGate(X86_XCPT_DF, X86_SEL_TYPE_SYS_TASK_GATE, 0 /*bDpl*/, BS3_SEL_TSS32_DF, 0, 0 /*cParams*/);
|
|---|
| 90 | }
|
|---|
| 91 |
|
|---|
