diff --git a/src/pal/pal.lds b/src/pal/pal.lds
index 7ee33d5e..4417d2d6 100644
--- a/src/pal/pal.lds
+++ b/src/pal/pal.lds
@@ -6,6 +6,12 @@
         occlum_pal_exec;
         occlum_pal_kill;
         occlum_pal_destroy;
+        pal_get_version;
+        pal_init;
+        pal_create_process;
+        pal_exec;
+        pal_kill;
+        pal_destroy;
     local:
         *;
 };
diff --git a/src/pal/src/pal_api.c b/src/pal/src/pal_api.c
index 4fc05a39..c4d358a6 100644
--- a/src/pal/src/pal_api.c
+++ b/src/pal/src/pal_api.c
@@ -157,3 +157,18 @@ int occlum_pal_destroy(void) {
     }
     return 0;
 }
+
+int pal_get_version(void) __attribute__((weak, alias ("occlum_pal_get_version")));
+
+int pal_init(const struct occlum_pal_attr *attr)\
+__attribute__ ((weak, alias ("occlum_pal_init")));
+
+int pal_create_process(struct occlum_pal_create_process_args *args)\
+__attribute__ ((weak, alias ("occlum_pal_create_process")));
+
+int pal_exec(struct occlum_pal_exec_args *args)\
+__attribute__ ((weak, alias ("occlum_pal_exec")));
+
+int pal_kill(int pid, int sig) __attribute__ ((weak, alias ("occlum_pal_kill")));
+
+int pal_destroy(void) __attribute__ ((weak, alias ("occlum_pal_destroy")));