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/* $Id: bs3-cmn-Trap64Init.c $ */
/** @file
* BS3Kit - Bs3Trap64Init
*/
/*
* Copyright (C) 2007-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox 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.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "bs3kit-template-header.h"
#undef Bs3Trap64Init
BS3_CMN_DEF(void, Bs3Trap64Init,(void))
{
Bs3Trap64InitEx(false);
}
#undef Bs3Trap64InitEx
BS3_CMN_DEF(void, Bs3Trap64InitEx,(bool fMoreIstUsage))
{
static const uint8_t s_aAssignments[] =
{
/* [X86_XCPT_DE] = */ 3,
/* [X86_XCPT_DB] = */ 2,
/* [X86_XCPT_NMI] = */ 0,
/* [X86_XCPT_BP] = */ 2,
/* [X86_XCPT_OF] = */ 3,
/* [X86_XCPT_BR] = */ 3,
/* [X86_XCPT_UD] = */ 4,
/* [X86_XCPT_NM] = */ 3,
/* [X86_XCPT_DF] = */ 1,
/* [0x09] = */ 0,
/* [X86_XCPT_TS] = */ 1,
/* [X86_XCPT_NP] = */ 5,
/* [X86_XCPT_SS] = */ 5,
/* [X86_XCPT_GP] = */ 6,
/* [X86_XCPT_PF] = */ 7,
/* [0x0f] = */ 0,
/* [X86_XCPT_MF] = */ 0,
/* [X86_XCPT_AC] = */ 3,
/* [X86_XCPT_MC] = */ 0,
/* [X86_XCPT_XF] = */ 0,
/* [X86_XCPT_VE] = */ 0,
/* [X86_XCPT_CP] = */ 6,
};
X86TSS64 BS3_FAR *pTss;
unsigned iIdt;
/*
* IDT entries, except the system call gate.
* The #DF entry get IST=1, all others IST=0.
*/
for (iIdt = 0; iIdt < BS3_TRAP_SYSCALL; iIdt++)
Bs3Trap64SetGate(iIdt, AMD64_SEL_TYPE_SYS_INT_GATE, 0 /*bDpl*/,
BS3_SEL_R0_CS64, g_Bs3Trap64GenericEntriesFlatAddr + iIdt * 8,
!fMoreIstUsage ? iIdt == X86_XCPT_DF : iIdt < RT_ELEMENTS(s_aAssignments) ? s_aAssignments[iIdt] : 0);
for (iIdt = BS3_TRAP_SYSCALL + 1; iIdt < 256; iIdt++)
Bs3Trap64SetGate(iIdt, AMD64_SEL_TYPE_SYS_INT_GATE, 0 /*bDpl*/,
BS3_SEL_R0_CS64, g_Bs3Trap64GenericEntriesFlatAddr + iIdt * 8, 0);
/*
* Initialize the normal TSS so we can do ring transitions via the IDT.
*/
pTss = &Bs3Tss64;
Bs3MemZero(pTss, sizeof(*pTss));
pTss->rsp0 = BS3_ADDR_STACK_R0;
pTss->rsp1 = BS3_ADDR_STACK_R1;
pTss->rsp2 = BS3_ADDR_STACK_R2;
pTss->ist1 = BS3_ADDR_STACK_R0_IST1;
pTss->ist2 = BS3_ADDR_STACK_R0_IST2;
pTss->ist3 = BS3_ADDR_STACK_R0_IST3;
pTss->ist4 = BS3_ADDR_STACK_R0_IST4;
pTss->ist5 = BS3_ADDR_STACK_R0_IST5;
pTss->ist6 = BS3_ADDR_STACK_R0_IST6;
pTss->ist7 = BS3_ADDR_STACK_R0_IST7;
}
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