etext_addr 235 tools/perf/util/probe-event.c u64 etext_addr = 0; etext_addr 239 tools/perf/util/probe-event.c ret = kernel_get_symbol_address_by_name("_etext", &etext_addr, etext_addr 242 tools/perf/util/probe-event.c if (ret == 0 && etext_addr < address)