more userlaand stuff

libc/include/rock.h

@@ -0,0 +1,17 @@
+#ifndef LIBC_ROCK_H
+#define LIBC_ROCK_H
+
+#include <stdint.h>
+
+static inline int32_t syscall(int num, uint32_t arg1, uint32_t arg2, uint32_t arg3) {
+    int32_t ret;
+    __asm__ __volatile__ (
+        "int $0x80"
+        : "=a" (ret)
+        : "0" (num), "b" (arg1), "c" (arg2), "d" (arg3)
+        : "memory"
+    );
+    return ret;
+}
+
+#endif

libc/include/string.h

@@ -0,0 +1,11 @@
+#ifndef LIBC_STRING_H
+#define LIBC_STRING_H
+
+#include <stddef.h>
+
+void* memcpy(void* dst, const void* src, size_t n);
+void* memset(void* dst, int c, size_t n);
+void* memmove(void* dst, const void* src, size_t n);
+int   memcmp(const void* s1, const void* s2, size_t n);
+
+#endif