for systems without tp register or kuser helper, new in linux commit 8fcd6c45f5a65621ec809b7866a3623e9a01d4ed
@@ -359,4 +359,5 @@
#define __ARM_NR_usr26 0x0f0003
#define __ARM_NR_usr32 0x0f0004
#define __ARM_NR_set_tls 0x0f0005
+#define __ARM_NR_get_tls 0x0f0006