Adding upstream version 2.10.0+dfsg.upstream/2.10.0+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 64 insertions, 0 deletions

diff --git a/lib/libc/memcpy_s.c b/lib/libc/memcpy_s.c
new file mode 100644
index 0000000..26953bf
--- /dev/null
+++ b/lib/libc/memcpy_s.c
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2013-2023, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2023, Intel Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <errno.h>
+#include <stddef.h>
+#include <string.h>
+
+int memcpy_s(void *dst, size_t dsize, void *src, size_t ssize)
+{
+	unsigned int *s = (unsigned int *)src;
+	unsigned int *d = (unsigned int *)dst;
+
+	/*
+	 * Check source and destination size is NULL
+	 */
+	if ((dst == NULL) || (src == NULL)) {
+		return -ENOMEM;
+	}
+
+	/*
+	 * Check source and destination size validity
+	 */
+	if ((dsize == 0) || (ssize == 0)) {
+		return -ERANGE;
+	}
+
+	/*
+	 * Check both source and destination size range
+	 */
+	if ((ssize > dsize) || (dsize > ssize)) {
+		return -EINVAL;
+	}
+
+	/*
+	 * Check both source and destination address overlapping
+	 * When (s > d < s + ssize)
+	 * Or (d > s < d + dsize)
+	 */
+
+	if (d > s) {
+		if ((d) < (s + ssize)) {
+			return -EOPNOTSUPP;
+		}
+	}
+
+	if (s > d) {
+		if ((s) < (d + dsize)) {
+			return -EOPNOTSUPP;
+		}
+	}
+
+	/*
+	 * Start copy process when there is no error
+	 */
+	while (ssize--) {
+		d[ssize] = s[ssize];
+	}
+
+	return 0;
+}