diff --git a/arch/um/os-Linux/user_syms.c b/arch/um/os-Linux/user_syms.c
new file mode 100644
index 0000000..75d7af9
--- /dev/null
+++ b/arch/um/os-Linux/user_syms.c
@@ -0,0 +1,95 @@
+#include "linux/types.h"
+#include "linux/module.h"
+
+/* Some of this are builtin function (some are not but could in the future),
+ * so I *must* declare good prototypes for them and then EXPORT them.
+ * The kernel code uses the macro defined by include/linux/string.h,
+ * so I undef macros; the userspace code does not include that and I
+ * add an EXPORT for the glibc one.*/
+
+#undef strlen
+#undef strstr
+#undef memcpy
+#undef memset
+
+extern size_t strlen(const char *);
+extern void *memcpy(void *, const void *, size_t);
+extern void *memmove(void *, const void *, size_t);
+extern void *memset(void *, int, size_t);
+extern int printf(const char *, ...);
+
+EXPORT_SYMBOL(strlen);
+EXPORT_SYMBOL(memcpy);
+EXPORT_SYMBOL(memmove);
+EXPORT_SYMBOL(memset);
+EXPORT_SYMBOL(printf);
+
+EXPORT_SYMBOL(strstr);
+
+/* Here, instead, I can provide a fake prototype. Yes, someone cares: genksyms.
+ * However, the modules will use the CRC defined *here*, no matter if it is
+ * good; so the versions of these symbols will always match
+ */
+#define EXPORT_SYMBOL_PROTO(sym)       \
+       int sym(void);                  \
+       EXPORT_SYMBOL(sym);
+
+#ifdef SUBARCH_i386
+EXPORT_SYMBOL(vsyscall_ehdr);
+EXPORT_SYMBOL(vsyscall_end);
+#endif
+
+EXPORT_SYMBOL_PROTO(__errno_location);
+
+EXPORT_SYMBOL_PROTO(access);
+EXPORT_SYMBOL_PROTO(open);
+EXPORT_SYMBOL_PROTO(open64);
+EXPORT_SYMBOL_PROTO(close);
+EXPORT_SYMBOL_PROTO(read);
+EXPORT_SYMBOL_PROTO(write);
+EXPORT_SYMBOL_PROTO(dup2);
+EXPORT_SYMBOL_PROTO(__xstat);
+EXPORT_SYMBOL_PROTO(__lxstat);
+EXPORT_SYMBOL_PROTO(__lxstat64);
+EXPORT_SYMBOL_PROTO(lseek);
+EXPORT_SYMBOL_PROTO(lseek64);
+EXPORT_SYMBOL_PROTO(chown);
+EXPORT_SYMBOL_PROTO(truncate);
+EXPORT_SYMBOL_PROTO(utime);
+EXPORT_SYMBOL_PROTO(chmod);
+EXPORT_SYMBOL_PROTO(rename);
+EXPORT_SYMBOL_PROTO(__xmknod);
+
+EXPORT_SYMBOL_PROTO(symlink);
+EXPORT_SYMBOL_PROTO(link);
+EXPORT_SYMBOL_PROTO(unlink);
+EXPORT_SYMBOL_PROTO(readlink);
+
+EXPORT_SYMBOL_PROTO(mkdir);
+EXPORT_SYMBOL_PROTO(rmdir);
+EXPORT_SYMBOL_PROTO(opendir);
+EXPORT_SYMBOL_PROTO(readdir);
+EXPORT_SYMBOL_PROTO(closedir);
+EXPORT_SYMBOL_PROTO(seekdir);
+EXPORT_SYMBOL_PROTO(telldir);
+
+EXPORT_SYMBOL_PROTO(ioctl);
+
+EXPORT_SYMBOL_PROTO(pread64);
+EXPORT_SYMBOL_PROTO(pwrite64);
+
+EXPORT_SYMBOL_PROTO(statfs);
+EXPORT_SYMBOL_PROTO(statfs64);
+
+EXPORT_SYMBOL_PROTO(getuid);
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */