user_arg0          29 tools/testing/selftests/powerpc/ptrace/ptrace-syscall.c #define user_arg0		gpr[3]
user_arg0          21 tools/testing/selftests/x86/ptrace_syscall.c # define user_arg0		rdi
user_arg0          31 tools/testing/selftests/x86/ptrace_syscall.c # define user_arg0		ebx