diff options
Diffstat (limited to 'src/VBox/ValidationKit/bootsectors/bs3kit/bs3-mode-EnteredMode.asm')
| -rw-r--r-- | src/VBox/ValidationKit/bootsectors/bs3kit/bs3-mode-EnteredMode.asm | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-mode-EnteredMode.asm b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-mode-EnteredMode.asm new file mode 100644 index 00000000..4cc2c11e --- /dev/null +++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-mode-EnteredMode.asm @@ -0,0 +1,279 @@ +; $Id: bs3-mode-EnteredMode.asm $ +;; @file +; BS3Kit - Bs3EnteredMode +; + +; +; 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 +; + +%include "bs3kit-template-header.mac" + +%if TMPL_BITS == 16 +BS3_EXTERN_DATA16 g_uBs3CpuDetected +%endif +BS3_EXTERN_DATA16 g_bBs3CurrentMode +TMPL_BEGIN_TEXT + +;; +; @cproto BS3_DECL(void) Bs3EnteredMode(void); +; +; @uses Nothing. +; +; @remarks ASSUMES we're in ring-0 when not in some kind of real mode. +; +BS3_PROC_BEGIN_MODE Bs3EnteredMode, BS3_PBC_NEAR ; won't need this outside the switchers, so always near. + push xBP + mov xBP, xSP + push xAX + push xCX + push xDX +TONLY16 push xBX +%if BS3_MODE_IS_64BIT_CODE(TMPL_MODE) + push r8 + push r9 +%endif + + ; + ; Load stack selector (not always necessary) and sometimes CS too. + ; +%if BS3_MODE_IS_RM_SYS(TMPL_MODE) + xor ax, ax +%elif BS3_MODE_IS_V86(TMPL_MODE) + extern v86_versions_of_Bs3EnteredMode_should_not_be_dragged_into_the_link + call v86_versions_of_Bs3EnteredMode_should_not_be_dragged_into_the_link +%elif BS3_MODE_IS_16BIT_CODE(TMPL_MODE) + jmp BS3_SEL_R0_CS16:.reloaded_cs +.reloaded_cs: + mov ax, BS3_SEL_R0_SS16 +%elif BS3_MODE_IS_32BIT_CODE(TMPL_MODE) + mov ax, BS3_SEL_R0_SS32 +%elif BS3_MODE_IS_64BIT_CODE(TMPL_MODE) + mov ax, BS3_SEL_R0_DS64 +%else + %error "TMPL_MODE" +%endif + mov ss, ax + + ; + ; Load selector appropriate for accessing BS3SYSTEM16 data. + ; +%if BS3_MODE_IS_16BIT_CODE(TMPL_MODE) + mov ax, BS3_SEL_SYSTEM16 +%else + mov ax, RT_CONCAT(BS3_SEL_R0_DS,TMPL_BITS) +%endif + mov ds, ax + + ; + ; Load the appropritate IDT or IVT. + ; Always 64-bit in long mode, otherwise according to TMPL_BITS. + ; +%if BS3_MODE_IS_RM_SYS(TMPL_MODE) + BS3_EXTERN_SYSTEM16 Bs3Lidt_Ivt + TMPL_BEGIN_TEXT + lidt [Bs3Lidt_Ivt] + +%elif BS3_MODE_IS_16BIT_SYS(TMPL_MODE) + BS3_EXTERN_SYSTEM16 Bs3Lidt_Idt16 + TMPL_BEGIN_TEXT + lidt [Bs3Lidt_Idt16 TMPL_WRT_SYSTEM16_OR_FLAT] + +%elif BS3_MODE_IS_32BIT_SYS(TMPL_MODE) + BS3_EXTERN_SYSTEM16 Bs3Lidt_Idt32 + TMPL_BEGIN_TEXT + lidt [Bs3Lidt_Idt32 TMPL_WRT_SYSTEM16_OR_FLAT] + +%elif BS3_MODE_IS_64BIT_SYS(TMPL_MODE) + BS3_EXTERN_SYSTEM16 Bs3Lidt_Idt64 + TMPL_BEGIN_TEXT + lidt [Bs3Lidt_Idt64 TMPL_WRT_SYSTEM16_OR_FLAT] +%else + %error "TMPL_MODE" +%endif + +%if !BS3_MODE_IS_RM_OR_V86(TMPL_MODE) + ; + ; Load the appropriate task selector. + ; Always 64-bit in long mode, otherwise according to TMPL_BITS. + ; + %if BS3_MODE_IS_64BIT_SYS(TMPL_MODE) + BS3_EXTERN_SYSTEM16 Bs3Gdte_Tss64 + TMPL_BEGIN_TEXT + and byte [5 + Bs3Gdte_Tss64 TMPL_WRT_SYSTEM16_OR_FLAT], ~X86_SEL_TYPE_SYS_TSS_BUSY_MASK + mov ax, BS3_SEL_TSS64 + + %elif BS3_MODE_IS_16BIT_SYS(TMPL_MODE) + BS3_EXTERN_SYSTEM16 Bs3Gdte_Tss16 + BS3_EXTERN_SYSTEM16 Bs3Gdte_Tss16DoubleFault + TMPL_BEGIN_TEXT + and byte [5 + Bs3Gdte_Tss16 TMPL_WRT_SYSTEM16_OR_FLAT], ~X86_SEL_TYPE_SYS_TSS_BUSY_MASK + and byte [5 + Bs3Gdte_Tss16DoubleFault TMPL_WRT_SYSTEM16_OR_FLAT], ~X86_SEL_TYPE_SYS_TSS_BUSY_MASK + mov ax, BS3_SEL_TSS16 + + %elif BS3_MODE_IS_32BIT_SYS(TMPL_MODE) + BS3_EXTERN_SYSTEM16 Bs3Gdte_Tss32 + BS3_EXTERN_SYSTEM16 Bs3Gdte_Tss32DoubleFault + BS3_EXTERN_SYSTEM16 Bs3Tss32 + BS3_EXTERN_SYSTEM16 Bs3Tss32DoubleFault + TMPL_BEGIN_TEXT + and byte [5 + Bs3Gdte_Tss32 TMPL_WRT_SYSTEM16_OR_FLAT], ~X86_SEL_TYPE_SYS_TSS_BUSY_MASK + and byte [5 + Bs3Gdte_Tss32DoubleFault TMPL_WRT_SYSTEM16_OR_FLAT], ~X86_SEL_TYPE_SYS_TSS_BUSY_MASK + mov eax, cr3 + mov [X86TSS32.cr3 + Bs3Tss32 TMPL_WRT_SYSTEM16_OR_FLAT], eax + mov [X86TSS32.cr3 + Bs3Tss32DoubleFault TMPL_WRT_SYSTEM16_OR_FLAT], eax + mov ax, BS3_SEL_TSS32 + %else + %error "TMPL_BITS" + %endif + ltr ax +%endif ; !TMPL_CMN_R86 + +%if !BS3_MODE_IS_RM_OR_V86(TMPL_MODE) + ; + ; Load the LDT. + ; + mov ax, BS3_SEL_LDT + lldt ax +%endif + + ; + ; Load ds and es; clear fs and gs. + ; +%if BS3_MODE_IS_RM_OR_V86(TMPL_MODE) + mov ax, BS3_SEL_DATA16 +%else + mov ax, RT_CONCAT(BS3_SEL_R0_DS,TMPL_BITS) +%endif + mov ds, ax + mov es, ax + +%if TMPL_BITS == 16 + ; For restoring after Bs3Trap* calls below. + push ax + push ax + + cmp byte [BS3_DATA16_WRT(g_uBs3CpuDetected)], BS3CPU_80286 + jbe .skip_fs_gs +%endif + xor ax, ax + mov fs, ax + mov gs, ax +.skip_fs_gs: + + ; + ; Set global indicating CPU mode. + ; + mov byte [BS3_DATA16_WRT(g_bBs3CurrentMode)], TMPL_MODE + + ; + ; Install system call handler. + ; Always 64-bit in long mode, otherwise according to TMPL_BITS. + ; +%if BS3_MODE_IS_RM_SYS(TMPL_MODE) + extern _Bs3TrapSystemCallHandler_rm + mov word [ss: BS3_TRAP_SYSCALL*4], _Bs3TrapSystemCallHandler_rm wrt CGROUP16 + mov word [ss: BS3_TRAP_SYSCALL*4 + 2], CGROUP16 + +%elif BS3_MODE_IS_16BIT_SYS(TMPL_MODE) + BS3_EXTERN_CMN Bs3Trap16SetGate + extern TMPL_NM(Bs3TrapSystemCallHandler) + BS3_BEGIN_TEXT16 + TMPL_BEGIN_TEXT + push 0 ; cParams + push TMPL_NM(Bs3TrapSystemCallHandler) wrt CGROUP16 + push BS3_SEL_R0_CS16 + push 3 ; DPL + push X86_SEL_TYPE_SYS_286_INT_GATE + push BS3_TRAP_SYSCALL + BS3_CALL Bs3Trap16SetGate,6 + add xSP, xCB * 6 + +%elif BS3_MODE_IS_32BIT_SYS(TMPL_MODE) + BS3_EXTERN_CMN Bs3Trap32SetGate + extern TMPL_NM(Bs3TrapSystemCallHandler) + TMPL_BEGIN_TEXT + push 0 ; cParams + push dword TMPL_NM(Bs3TrapSystemCallHandler) wrt FLAT + push BS3_SEL_R0_CS32 + push 3 ; DPL + push X86_SEL_TYPE_SYS_386_INT_GATE + push BS3_TRAP_SYSCALL + BS3_CALL Bs3Trap32SetGate,6 + add xSP, xCB * 6 + +%elif BS3_MODE_IS_64BIT_SYS(TMPL_MODE) + BS3_EXTERN_CMN Bs3Trap64SetGate + extern _Bs3TrapSystemCallHandler_lm64 + TMPL_BEGIN_TEXT + push 0 ; bIst + %if BS3_MODE_IS_64BIT_CODE(TMPL_MODE) + push _Bs3TrapSystemCallHandler_lm64 wrt FLAT + %else + push dword 0 ; upper offset + push dword _Bs3TrapSystemCallHandler_lm64 wrt FLAT + %endif + push BS3_SEL_R0_CS64 + push 3 ; DPL + push AMD64_SEL_TYPE_SYS_INT_GATE + push BS3_TRAP_SYSCALL + BS3_CALL Bs3Trap64SetGate,6 + add xSP, xCB * 5 + 8 +%else + %error "TMPL_BITS" +%endif + +%if TMPL_BITS == 16 + ; Restoring ds and es after the above calls. + pop es + pop ds +%endif + + ; + ; Epilogue. + ; +%if TMPL_BITS == 64 + pop r9 + pop r8 +%endif +TONLY16 pop xBX + pop xDX + pop xCX + pop xAX +%ifdef BS3_STRICT + cmp xBP, xSP + je .return_stack_ok + int3 +.return_stack_ok: +%endif + pop xBP + ret +BS3_PROC_END_MODE Bs3EnteredMode + |