diff options
Diffstat (limited to 'src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-Trap32Init.c')
| -rw-r--r-- | src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-Trap32Init.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-Trap32Init.c b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-Trap32Init.c new file mode 100644 index 00000000..3cf1ec82 --- /dev/null +++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-Trap32Init.c @@ -0,0 +1,101 @@ +/* $Id: bs3-cmn-Trap32Init.c $ */ +/** @file + * BS3Kit - Bs3Trap32Init + */ + +/* + * 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" + + +/********************************************************************************************************************************* +* External Symbols * +*********************************************************************************************************************************/ +#define g_Bs3Trap32DoubleFaultHandlerFlatAddr BS3_DATA_NM(g_Bs3Trap32DoubleFaultHandlerFlatAddr) +extern uint32_t g_Bs3Trap32DoubleFaultHandlerFlatAddr; + + +#undef Bs3Trap32Init +BS3_CMN_DEF(void, Bs3Trap32Init,(void)) +{ + X86TSS32 BS3_FAR *pTss; + unsigned iIdt; + + /* + * IDT entries, except the system call gate. + */ + for (iIdt = 0; iIdt < BS3_TRAP_SYSCALL; iIdt++) + Bs3Trap32SetGate(iIdt, X86_SEL_TYPE_SYS_386_INT_GATE, 0 /*bDpl*/, + BS3_SEL_R0_CS32, g_Bs3Trap32GenericEntriesFlatAddr + iIdt * 10, 0 /*cParams*/); + for (iIdt = BS3_TRAP_SYSCALL + 1; iIdt < 256; iIdt++) + Bs3Trap32SetGate(iIdt, X86_SEL_TYPE_SYS_386_INT_GATE, 0 /*bDpl*/, + BS3_SEL_R0_CS32, g_Bs3Trap32GenericEntriesFlatAddr + iIdt * 10, 0 /*cParams*/); + + /* + * Initialize the normal TSS so we can do ring transitions via the IDT. + */ + pTss = &Bs3Tss32; + Bs3MemZero(pTss, sizeof(*pTss)); + pTss->esp0 = BS3_ADDR_STACK_R0; + pTss->ss0 = BS3_SEL_R0_SS32; + pTss->esp1 = BS3_ADDR_STACK_R1; + pTss->ss1 = BS3_SEL_R1_SS32 | 1; + pTss->esp2 = BS3_ADDR_STACK_R2; + pTss->ss2 = BS3_SEL_R2_SS32 | 2; + + /* + * Initialize the double fault TSS. + * cr3 is filled in by switcher code, when needed. + */ + pTss = &Bs3Tss32DoubleFault; + Bs3MemZero(pTss, sizeof(*pTss)); + pTss->esp0 = BS3_ADDR_STACK_R0; + pTss->ss0 = BS3_SEL_R0_SS32; + pTss->esp1 = BS3_ADDR_STACK_R1; + pTss->ss1 = BS3_SEL_R1_SS32 | 1; + pTss->esp2 = BS3_ADDR_STACK_R2; + pTss->ss2 = BS3_SEL_R2_SS32 | 2; + pTss->eip = g_Bs3Trap32DoubleFaultHandlerFlatAddr; + pTss->eflags = X86_EFL_1; + pTss->esp = BS3_ADDR_STACK_R0_IST1; + pTss->es = BS3_SEL_R0_DS32; + pTss->ds = BS3_SEL_R0_DS32; + pTss->cs = BS3_SEL_R0_CS32; + pTss->ss = BS3_SEL_R0_SS32; + + Bs3Trap32SetGate(X86_XCPT_DF, X86_SEL_TYPE_SYS_TASK_GATE, 0 /*bDpl*/, BS3_SEL_TSS32_DF, 0, 0 /*cParams*/); +} + |