diff --git a/libc/kernel/uapi/linux/btf.h b/libc/kernel/uapi/linux/btf.h
index 33dde5a..6e13631 100644
--- a/libc/kernel/uapi/linux/btf.h
+++ b/libc/kernel/uapi/linux/btf.h
@@ -44,6 +44,7 @@
 };
 #define BTF_INFO_KIND(info) (((info) >> 24) & 0x0f)
 #define BTF_INFO_VLEN(info) ((info) & 0xffff)
+#define BTF_INFO_KFLAG(info) ((info) >> 31)
 #define BTF_KIND_UNKN 0
 #define BTF_KIND_INT 1
 #define BTF_KIND_PTR 2
@@ -56,8 +57,10 @@
 #define BTF_KIND_VOLATILE 9
 #define BTF_KIND_CONST 10
 #define BTF_KIND_RESTRICT 11
-#define BTF_KIND_MAX 11
-#define NR_BTF_KINDS 12
+#define BTF_KIND_FUNC 12
+#define BTF_KIND_FUNC_PROTO 13
+#define BTF_KIND_MAX 13
+#define NR_BTF_KINDS 14
 #define BTF_INT_ENCODING(VAL) (((VAL) & 0x0f000000) >> 24)
 #define BTF_INT_OFFSET(VAL) (((VAL & 0x00ff0000)) >> 16)
 #define BTF_INT_BITS(VAL) ((VAL) & 0x000000ff)
@@ -78,4 +81,10 @@
   __u32 type;
   __u32 offset;
 };
+#define BTF_MEMBER_BITFIELD_SIZE(val) ((val) >> 24)
+#define BTF_MEMBER_BIT_OFFSET(val) ((val) & 0xffffff)
+struct btf_param {
+  __u32 name_off;
+  __u32 type;
+};
 #endif