Add stack_chk functionality

build.rs

@@ -13,7 +13,9 @@ fn main() {
         .flag("-fno-stack-protector")
         .file("src/c/dlmalloc.c")
         .file("src/c/fcntl.c")
+        .file("src/c/stack_chk.c")
         .file("src/c/stdio.c")
+        .file("src/c/unistd.c")
         .compile("relibc_c");
 
     println!("cargo:rustc-link-lib=static=relibc_c");

src/c/stack_chk.c

@@ -0,0 +1,10 @@
+#include <stdint.h>
+
+void abort();
+
+uintptr_t __stack_chk_guard = 0xd048c37519fcadfe;
+
+__attribute__((noreturn))
+void __stack_chk_fail(void) {
+	abort();
+}