diff options
Diffstat (limited to 'src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-TrapSetJmp.asm')
| -rw-r--r-- | src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-TrapSetJmp.asm | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-TrapSetJmp.asm b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-TrapSetJmp.asm new file mode 100644 index 00000000..495f77d1 --- /dev/null +++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-TrapSetJmp.asm @@ -0,0 +1,143 @@ +; $Id: bs3-cmn-TrapSetJmp.asm $ +;; @file +; BS3Kit - Bs3TrapSetJmp. +; + +; +; 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.mac" + + +;********************************************************************************************************************************* +;* External Symbols * +;********************************************************************************************************************************* +BS3_EXTERN_CMN Bs3RegCtxSave +%if TMPL_BITS == 16 +BS3_EXTERN_CMN_FAR Bs3SelFar32ToFlat32 +%endif +BS3_EXTERN_DATA16 g_Bs3TrapSetJmpCtx +BS3_EXTERN_DATA16 g_pBs3TrapSetJmpFrame +TMPL_BEGIN_TEXT + + +;; +; Sets up a one-shot set-jmp-on-trap. +; +; @uses See, applicable C calling convention. +; +BS3_PROC_BEGIN_CMN Bs3TrapSetJmp, BS3_PBC_HYBRID + BS3_CALL_CONV_PROLOG 1 + push xBP + mov xBP, xSP + push xBX +BONLY64 sub xSP, 20h + + ; + ; Save the current register context. + ; +BONLY16 push ds + BS3_LEA_MOV_WRT_RIP(xAX, BS3_DATA16_WRT(g_Bs3TrapSetJmpCtx)) + push xAX + BS3_CALL Bs3RegCtxSave, 1 + add xSP, sCB + + ; + ; Adjust the return context a little. + ; + BS3_LEA_MOV_WRT_RIP(xBX, BS3_DATA16_WRT(g_Bs3TrapSetJmpCtx)) + mov xAX, [xBP + xCB] ; The return address of this function + mov [xBX + BS3REGCTX.rip], xAX +%if TMPL_BITS == 16 + mov xAX, [xBP + xCB+2] ; The return address CS of this function. + mov [xBX + BS3REGCTX.cs], xAX +%endif + mov xAX, [xBP] + mov [xBX + BS3REGCTX.rbp], xAX + lea xAX, [xBP + xCB + cbCurRetAddr] + mov [xBX + BS3REGCTX.rsp], xAX + mov xAX, [xBP - xCB] + mov [xBX + BS3REGCTX.rbx], xAX + xor xAX, xAX + mov [xBX + BS3REGCTX.rax], xAX ; the return value. + + ; + ; Fill the trap frame return structure. + ; + push xDI +%if TMPL_BITS == 16 + push es + les di, [xBP + xCB + cbCurRetAddr] + mov cx, BS3TRAPFRAME_size / 2 + mov ax, 0faceh + rep stosw + pop es +%else + mov xDI, [xBP + xCB*2] + mov ecx, BS3TRAPFRAME_size / 4 + mov xAX, 0feedfaceh + rep stosd +%endif + pop xDI + + ; + ; Save the (flat) pointer to the trap frame return structure. + ; +%if TMPL_BITS == 16 + xor ax, ax + push word [xBP + xCB + cbCurRetAddr + 2] + push ax + push word [xBP + xCB + cbCurRetAddr] + push cs + call Bs3SelFar32ToFlat32 + add sp, 6h + mov [BS3_DATA16_WRT(g_pBs3TrapSetJmpFrame)], ax + mov [2 + BS3_DATA16_WRT(g_pBs3TrapSetJmpFrame)], dx +%else + mov xAX, [xBP + xCB*2] + mov [BS3_DATA16_WRT(g_pBs3TrapSetJmpFrame)], eax +%endif + + ; + ; Return 'true'. + ; + mov xAX, 1 +BONLY64 add xSP, 20h + pop xBX + pop xBP + BS3_CALL_CONV_EPILOG 1 + BS3_HYBRID_RET +BS3_PROC_END_CMN Bs3TrapSetJmp + |