ARCH_SET_GS	0x1001
ARCH_SET_FS	0x1002
ARCH_GET_FS	0x1003
ARCH_GET_GS	0x1004
ARCH_GET_CPUID	0x1011
ARCH_SET_CPUID	0x1012
ARCH_MAP_VDSO_X32	0x2001
ARCH_MAP_VDSO_32	0x2002
ARCH_MAP_VDSO_64	0x2003