+#if defined(__native_client__)
+int
+mono_mprotect (void *addr, size_t length, int flags)
+{
+ int prot = prot_from_flags (flags);
+ void *new_addr;
+
+ if (flags & MONO_MMAP_DISCARD) memset (addr, 0, length);
+
+ new_addr = mmap(addr, length, prot, MAP_PRIVATE | MAP_FIXED | MAP_ANONYMOUS, -1, 0);
+ if (new_addr == addr) return 0;
+ return -1;
+}
+#else