1 files changed, 85 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-MemCpy.c b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-MemCpy.c
new file mode 100644
index 00000000..0c1a5ca8
--- /dev/null
+++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-MemCpy.c
@@ -0,0 +1,85 @@
+/* $Id: bs3-cmn-MemCpy.c $ */
+/** @file
+ * BS3Kit - Bs3MemCpy
+ */
+
+/*
+ * Copyright (C) 2007-2022 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
+ */
+
+#include "bs3kit-template-header.h"
+
+#undef Bs3MemCpy
+BS3_CMN_DEF(void BS3_FAR *, Bs3MemCpy,(void BS3_FAR *pvDst, const void BS3_FAR *pvSrc, size_t cbToCopy))
+{
+#if 1
+    const size_t BS3_FAR   *pBigSrc = (const size_t BS3_FAR *)pvSrc;
+    size_t BS3_FAR         *pBigDst = (size_t *)pvDst;
+    size_t                  cBig = cbToCopy / sizeof(size_t);
+    while (cBig-- > 0)
+        *pBigDst++ = *pBigSrc++;
+
+    switch (cbToCopy % sizeof(size_t))
+    {
+#if TMPL_BITS >= 64
+        case 7: ((uint8_t BS3_FAR *)pBigDst)[6] = ((const uint8_t BS3_FAR *)pBigSrc)[6];
+        case 6: ((uint8_t BS3_FAR *)pBigDst)[5] = ((const uint8_t BS3_FAR *)pBigSrc)[5];
+        case 5: ((uint8_t BS3_FAR *)pBigDst)[4] = ((const uint8_t BS3_FAR *)pBigSrc)[4];
+        case 4: ((uint8_t BS3_FAR *)pBigDst)[3] = ((const uint8_t BS3_FAR *)pBigSrc)[3];
+#endif
+#if TMPL_BITS >= 32
+        case 3: ((uint8_t BS3_FAR *)pBigDst)[2] = ((const uint8_t BS3_FAR *)pBigSrc)[2];
+        case 2: ((uint8_t BS3_FAR *)pBigDst)[1] = ((const uint8_t BS3_FAR *)pBigSrc)[1];
+#endif
+        case 1: ((uint8_t BS3_FAR *)pBigDst)[0] = ((const uint8_t BS3_FAR *)pBigSrc)[0];
+        case 0:
+            break;
+    }
+
+#else
+    size_t          cLargeRounds;
+    BS3CPTRUNION    uSrc;
+    BS3PTRUNION     uDst;
+    uSrc.pv = pvSrc;
+    uDst.pv = pvDst;
+
+    cLargeRounds = cbToCopy / sizeof(*uSrc.pcb);
+    while (cLargeRounds-- > 0)
+        *uDst.pcb++ = *uSrc.pcb++;
+
+    cbToCopy %= sizeof(*uSrc.pcb);
+    while (cbToCopy-- > 0)
+        *uDst.pb++ = *uSrc.pb++;
+
+#endif
+
+    return pvDst;
+}
+