1 files changed, 96 insertions, 0 deletions
diff --git a/MdePkg/Library/CompilerIntrinsicsLib/memset.c b/MdePkg/Library/CompilerIntrinsicsLib/memset.c
new file mode 100644
index 0000000000..3e45302fe6
--- /dev/null
+++ b/MdePkg/Library/CompilerIntrinsicsLib/memset.c
@@ -0,0 +1,96 @@
+// ------------------------------------------------------------------------------
+//
+// Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
+// Copyright (c) 2021, Arm Limited. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+// ------------------------------------------------------------------------------
+
+typedef __SIZE_TYPE__ size_t;
+
+static __attribute__ ((__used__))
+void *
+__memset (
+  void    *s,
+  int     c,
+  size_t  n
+  )
+{
+  unsigned char  *d;
+
+  d = s;
+
+  while (n-- != 0) {
+    *d++ = c;
+  }
+
+  return s;
+}
+
+//
+// Other modules (such as CryptoPkg/IntrinsicLib) may provide another
+// implementation of memset(), which may conflict with this one if this
+// object was pulled into the link due to the definitions below. So make
+// our memset() 'weak' to let the other implementation take precedence.
+//
+__attribute__ ((__weak__, __alias__ ("__memset")))
+void *
+memset (
+  void    *dest,
+  int     c,
+  size_t  n
+  );
+
+#ifdef __arm__
+
+void
+__aeabi_memset (
+  void    *dest,
+  size_t  n,
+  int     c
+  )
+{
+  __memset (dest, c, n);
+}
+
+__attribute__ ((__alias__ ("__aeabi_memset")))
+void
+__aeabi_memset4 (
+  void    *dest,
+  size_t  n,
+  int     c
+  );
+
+__attribute__ ((__alias__ ("__aeabi_memset")))
+void
+__aeabi_memset8 (
+  void    *dest,
+  size_t  n,
+  int     c
+  );
+
+void
+__aeabi_memclr (
+  void    *dest,
+  size_t  n
+  )
+{
+  __memset (dest, 0, n);
+}
+
+__attribute__ ((__alias__ ("__aeabi_memclr")))
+void
+__aeabi_memclr4 (
+  void    *dest,
+  size_t  n
+  );
+
+__attribute__ ((__alias__ ("__aeabi_memclr")))
+void
+__aeabi_memclr8 (
+  void    *dest,
+  size_t  n
+  );
+
+#endif