sigsegv_or_sigbus 131 tools/testing/selftests/x86/syscall_arg_fault.c sethandler(SIGSEGV, sigsegv_or_sigbus, SA_ONSTACK); sigsegv_or_sigbus 137 tools/testing/selftests/x86/syscall_arg_fault.c sethandler(SIGBUS, sigsegv_or_sigbus, SA_ONSTACK);