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