PT_R16            238 arch/ia64/include/uapi/asm/ptrace_offsets.h #define PT_R16			0x08e0
PT_R16             22 arch/mips/include/asm/pm.h 	LONG_S	$16, PT_R16(sp)
PT_R16             84 arch/powerpc/include/uapi/asm/ptrace.h #define PT_R16	16