user_arg1          30 tools/testing/selftests/powerpc/ptrace/ptrace-syscall.c #define user_arg1		gpr[4]
user_arg1          22 tools/testing/selftests/x86/ptrace_syscall.c # define user_arg1		rsi
user_arg1          32 tools/testing/selftests/x86/ptrace_syscall.c # define user_arg1		ecx