VirtualBox

source: vbox/trunk/src/VBox/Runtime/common/asm/ASMGetSegAttr.asm@ 103795

Last change on this file since 103795 was 98103, checked in by vboxsync, 23 months ago

Copyright year updates by scm.

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1; $Id: ASMGetSegAttr.asm 98103 2023-01-17 14:15:46Z vboxsync $
2;; @file
3; IPRT - ASMGetSegAttr().
4;
5
6;
7; Copyright (C) 2013-2023 Oracle and/or its affiliates.
8;
9; This file is part of VirtualBox base platform packages, as
10; available from https://www.virtualbox.org.
11;
12; This program is free software; you can redistribute it and/or
13; modify it under the terms of the GNU General Public License
14; as published by the Free Software Foundation, in version 3 of the
15; License.
16;
17; This program is distributed in the hope that it will be useful, but
18; WITHOUT ANY WARRANTY; without even the implied warranty of
19; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20; General Public License for more details.
21;
22; You should have received a copy of the GNU General Public License
23; along with this program; if not, see <https://www.gnu.org/licenses>.
24;
25; The contents of this file may alternatively be used under the terms
26; of the Common Development and Distribution License Version 1.0
27; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28; in the VirtualBox distribution, in which case the provisions of the
29; CDDL are applicable instead of those of the GPL.
30;
31; You may elect to license modified versions of this file under the
32; terms and conditions of either the GPL or the CDDL or both.
33;
34; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35;
36
37;*******************************************************************************
38;* Header Files *
39;*******************************************************************************
40%include "iprt/asmdefs.mac"
41
42BEGINCODE
43
44;;
45; Get the segment attributes for a selector.
46;
47; @param uSel x86: [ebp + 08h] msc: ecx gcc: edi The selector value.
48; @returns Segment attributes on success or ~0U on failure.
49;
50; @remarks Using ~0U for failure is chosen because valid access rights always
51; have bits 0:7 as 0 (on both Intel & AMD).
52;
53RT_BEGINPROC ASMGetSegAttr
54%ifdef ASM_CALL64_MSC
55 and ecx, 0ffffh
56 lar eax, ecx
57%elifdef ASM_CALL64_GCC
58 and edi, 0ffffh
59 lar eax, edi
60%elifdef RT_ARCH_X86
61 movzx edx, word [esp + 4]
62 lar eax, edx
63%else
64 %error "Which arch is this?"
65%endif
66 jz .return
67 mov eax, 0ffffffffh
68.return:
69 ret
70ENDPROC ASMGetSegAttr
71
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