Reorganise runtime libraries provided by KLEE

Strictly differentiate between the following type of libraries:

* FreeStanding: contains minimal amount of methods a compiler would expect
* klee-libc: contains a minimal libc implementation
* POSIX: contains a POSIX layer that can be used on top of a libc implementation
* Intrinsic: contains additional runtime functions which provide KLEE-specific functionalities, (e.g. checks)

Builds always archives instead of single modules.
This allows to reduce linked-in dependencies of tested applications.

1 files changed, 30 insertions, 0 deletions

diff --git a/runtime/FreeStanding/memmove.c b/runtime/FreeStanding/memmove.c
new file mode 100644
index 00000000..ee0e53ae
--- /dev/null
+++ b/runtime/FreeStanding/memmove.c
@@ -0,0 +1,30 @@
+/*===-- memmove.c ---------------------------------------------------------===//
+//
+//                     The KLEE Symbolic Virtual Machine
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===*/
+
+#include <stdlib.h>
+
+void *memmove(void *dst, const void *src, size_t count) {
+  char *a = dst;
+  const char *b = src;
+
+  if (src == dst)
+    return dst;
+
+  if (src > dst) {
+    while (count--)
+      *a++ = *b++;
+  } else {
+    a += count - 1;
+    b += count - 1;
+    while (count--)
+      *a-- = *b--;
+  }
+
+  return dst;
+}