1 files changed, 61 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/asm/ASMGetSegAttr.asm b/src/VBox/Runtime/common/asm/ASMGetSegAttr.asm
new file mode 100644
index 00000000..7306cf19
--- /dev/null
+++ b/src/VBox/Runtime/common/asm/ASMGetSegAttr.asm
@@ -0,0 +1,61 @@
+; $Id: ASMGetSegAttr.asm $
+;; @file
+; IPRT - ASMGetSegAttr().
+;
+
+;
+; Copyright (C) 2013-2019 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
+