1 files changed, 62 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-ExtCtxInit.c b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-ExtCtxInit.c
new file mode 100644
index 00000000..ea961885
--- /dev/null
+++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-ExtCtxInit.c
@@ -0,0 +1,62 @@
+/* $Id: bs3-cmn-ExtCtxInit.c $ */
+/** @file
+ * BS3Kit - Bs3ExtCtxInit
+ */
+
+/*
+ * Copyright (C) 2007-2019 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 "bs3kit-template-header.h"
+#include <iprt/asm-amd64-x86.h>
+
+
+#undef Bs3ExtCtxInit
+BS3_CMN_DEF(PBS3EXTCTX, Bs3ExtCtxInit,(PBS3EXTCTX pExtCtx, uint16_t cbExtCtx, uint64_t fFlags))
+{
+    Bs3MemSet(pExtCtx, 0, cbExtCtx);
+    if (cbExtCtx >= RT_UOFFSETOF(BS3EXTCTX, Ctx) + sizeof(X86FXSTATE) + sizeof(X86XSAVEHDR))
+    {
+        BS3_ASSERT(fFlags & XSAVE_C_X87);
+        pExtCtx->enmMethod = BS3EXTCTXMETHOD_XSAVE;
+        pExtCtx->Ctx.x.Hdr.bmXState = fFlags;
+    }
+    else if (cbExtCtx >= RT_UOFFSETOF(BS3EXTCTX, Ctx) + sizeof(X86FXSTATE))
+    {
+        BS3_ASSERT(fFlags == 0);
+        pExtCtx->enmMethod = BS3EXTCTXMETHOD_FXSAVE;
+    }
+    else
+    {
+        BS3_ASSERT(fFlags == 0);
+        BS3_ASSERT(cbExtCtx >= RT_UOFFSETOF(BS3EXTCTX, Ctx) + sizeof(X86FPUSTATE));
+        pExtCtx->enmMethod = BS3EXTCTXMETHOD_ANCIENT;
+    }
+    pExtCtx->cb             = cbExtCtx;
+    pExtCtx->u16Magic       = BS3EXTCTX_MAGIC;
+    pExtCtx->fXcr0Nominal   = fFlags;
+    pExtCtx->fXcr0Saved     = fFlags;
+    return pExtCtx;
+}
+