user_ax 230 tools/testing/selftests/x86/ptrace_syscall.c regs.user_ax = regs.user_syscall_nr; user_ax 255 tools/testing/selftests/x86/ptrace_syscall.c regs.user_ax = SYS_getpid; user_ax 364 tools/testing/selftests/x86/ptrace_syscall.c (long)regs.user_ax);