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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:17:27 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:17:27 +0000
commitf215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch)
tree6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-TrapSetJmp.asm
parentInitial commit. (diff)
downloadvirtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz
virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-TrapSetJmp.asm')
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diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-TrapSetJmp.asm b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-TrapSetJmp.asm
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+; $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
+