; $Id$

;; @file

; IPRT - ASMGetSegAttr().

;

;

; Copyright (C) 2013 Oracle Corporation

;

; This file is part of VirtualBox Open Source Edition (OSE), as

; available from http://www.virtualbox.org. This file is free software;

; you can redistribute it and/or modify it under the terms of the GNU

; General Public License (GPL) as published by the Free Software

; Foundation, in version 2 as it comes in the "COPYING" file of the

; VirtualBox OSE distribution. VirtualBox OSE is distributed in the

; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.

;

; The contents of this file may alternatively be used under the terms

; of the Common Development and Distribution License Version 1.0

; (CDDL) only, as it comes in the "COPYING.CDDL" file of the

; VirtualBox OSE 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.

;

;*******************************************************************************

;* Header Files *

;*******************************************************************************

%include "iprt/asmdefs.mac"

BEGINCODE

;;

; Get the segment attributes for a selector.

;

; @param uSel x86: [ebp + 08h] msc: ecx gcc: edi The selector value.

; @returns Segment attributes on success or ~0U on failure.

;

; @remarks Using ~0U for failure is chosen because valid access rights always

; have bits 0:7 as 0 (on both Intel & AMD).

;

BEGINPROC_EXPORTED ASMGetSegAttr

%ifdef ASM_CALL64_MSC

and ecx, 0ffffh

lar eax, ecx

%elifdef ASM_CALL64_GCC

and edi, 0ffffh

lar eax, edi

%elifdef RT_ARCH_X86

movzx edx, word [esp + 4]

lar eax, edx

%else

%error "Which arch is this?"

%endif

jz .return

mov eax, 0ffffffffh

.return:

ret

ENDPROC ASMGetSegAttr