diff options
Diffstat (limited to 'tools/perf/util/machine.c')
-rw-r--r-- | tools/perf/util/machine.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index d5384807372b..1e9fe6b4d8db 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -808,6 +808,47 @@ int machine__process_ksymbol(struct machine *machine __maybe_unused, return machine__process_ksymbol_register(machine, event, sample); } +int machine__process_text_poke(struct machine *machine, union perf_event *event, + struct perf_sample *sample __maybe_unused) +{ + struct map *map = maps__find(&machine->kmaps, event->text_poke.addr); + u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; + + if (dump_trace) + perf_event__fprintf_text_poke(event, stdout); + + if (!event->text_poke.new_len) + return 0; + + if (cpumode != PERF_RECORD_MISC_KERNEL) { + pr_debug("%s: unsupported cpumode - ignoring\n", __func__); + return 0; + } + + if (map && map->dso) { + u8 *new_bytes = event->text_poke.bytes + event->text_poke.old_len; + int ret; + + /* + * Kernel maps might be changed when loading symbols so loading + * must be done prior to using kernel maps. + */ + map__load(map); + ret = dso__data_write_cache_addr(map->dso, map, machine, + event->text_poke.addr, + new_bytes, + event->text_poke.new_len); + if (ret != event->text_poke.new_len) + pr_debug("Failed to write kernel text poke at %#" PRI_lx64 "\n", + event->text_poke.addr); + } else { + pr_debug("Failed to find kernel text poke address map for %#" PRI_lx64 "\n", + event->text_poke.addr); + } + + return 0; +} + static struct map *machine__addnew_module_map(struct machine *machine, u64 start, const char *filename) { @@ -1930,6 +1971,8 @@ int machine__process_event(struct machine *machine, union perf_event *event, ret = machine__process_ksymbol(machine, event, sample); break; case PERF_RECORD_BPF_EVENT: ret = machine__process_bpf(machine, event, sample); break; + case PERF_RECORD_TEXT_POKE: + ret = machine__process_text_poke(machine, event, sample); break; default: ret = -1; break; |