{"id":37963,"date":"2019-10-31T22:20:52","date_gmt":"2019-10-31T19:20:52","guid":{"rendered":"https:\/\/prohoster.info\/blog\/v-sostav-gcc-prinyat-bekend-dlya-kompilyatsii-v-ebpf\/"},"modified":"2019-10-31T22:20:52","modified_gmt":"2019-10-31T19:20:52","slug":"v-sostav-gcc-prinyat-bekend-dlya-kompilyatsii-v-ebpf","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/v-sostav-gcc-prinyat-bekend-dlya-kompilyatsii-v-ebpf","title":{"rendered":"Do sk\u0142adu GCC przyj\u0119to backend do kompilacji w eBPF","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

W sk\u0142ad zestawu kompilator\u00f3w GCC przyj\u0119ty<\/a><\/noindex> kod do kompilacji program\u00f3w dla wbudowanego w j\u0105dro Linux interpreteru bajtkodu eBPF<\/a><\/noindex>. Dzi\u0119ki zastosowaniu JIT-kompilacji, w j\u0105drze bajtkod na bie\u017c\u0105co jest t\u0142umaczony na instrukcje maszynowe i wykonywany z wydajno\u015bci\u0105 kodu natywnego. \u0141atki z wsparciem eBPF zaakceptowano<\/a><\/noindex> w ga\u0142\u0119zi, na podstawie kt\u00f3rej rozwija si\u0119 wydanie GCC 10.<\/p>\n

Opr\u00f3cz backendu do generowania bajtkodu GCC zawiera port libgcc dla eBPF oraz narz\u0119dzia do tworzenia plik\u00f3w ELF, kt\u00f3re umo\u017cliwiaj\u0105 uruchamianie kodu w maszynie wirtualnej eBPF przy u\u017cyciu dostarczonych przez j\u0105dro loader\u00f3w. \u0141atki wspieraj\u0105ce eBPF w GCC zosta\u0142y przygotowane przez in\u017cynier\u00f3w z firmy Oracle, kt\u00f3rzy wcze\u015bniej ju\u017c zapewnili<\/a><\/noindex> wsparcie eBPF w GNU binutils. W opracowaniu jest r\u00f3wnie\u017c symulator i \u0142atki dla GDB, kt\u00f3re pozwol\u0105 na debugowanie program\u00f3w eBPF bez \u0142adowania do j\u0105dra.<\/p>\n

Programy dla eBPF mog\u0105 by\u0107 definiowane w podzbiorze j\u0119zyka C, kompilowane i \u0142adowane do j\u0105dra. Przed wykonaniem interpreter eBPF sprawdza bajtkod pod k\u0105tem stosowania dozwolonych instrukcji i nak\u0142ada okre\u015blone zasady na kod (na przyk\u0142ad brak p\u0119tli).
\nPocz\u0105tkowo do kompilacji eBPF w Linux wykorzystywano narz\u0119dzia oparte na LLVM. Wsparcie eBPF w GCC jest interesuj\u0105ce, poniewa\u017c pozwala na u\u017cycie jednego zestawu narz\u0119dzi do budowy j\u0105dra Linux i program\u00f3w eBPF, bez instalacji dodatkowych zale\u017cno\u015bci. <\/p>\n

W formie program\u00f3w eBPF mo\u017cna tworzy\u0107 obs\u0142ugiwacze operacji sieciowych, filtrowa\u0107 ruch, zarz\u0105dza\u0107 przepustowo\u015bci\u0105, monitorowa\u0107 dzia\u0142anie system\u00f3w, przechwytywa\u0107 wywo\u0142ania systemowe, kontrolowa\u0107 dost\u0119p, zlicza\u0107 cz\u0119stotliwo\u015b\u0107 i czas wykonania operacji, a tak\u017ce wykonywa\u0107 \u015bledzenie z u\u017cyciem kprobes\/uprobes\/tracepoints.<\/p>\n

<\/a><\/noindex><\/p>\n

\u0179r\u00f3d\u0142o: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0441\u043e\u0441\u0442\u0430\u0432 \u043d\u0430\u0431\u043e\u0440\u0430 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440\u043e\u0432 GCC \u043f\u0440\u0438\u043d\u044f\u0442 \u043a\u043e\u0434 \u0434\u043b\u044f \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u0438 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c \u0434\u043b\u044f \u0432\u0441\u0442\u0440\u043e\u0435\u043d\u043d\u043e\u0433\u043e \u0432 \u044f\u0434\u0440\u043e Linux \u0438\u043d\u0442\u0435\u0440\u043f\u0440\u0435\u0442\u0430\u0442\u043e\u0440\u0430 \u0431\u0430\u0439\u0442\u043a\u043e\u0434\u0430 eBPF. \u0411\u043b\u0430\u0433\u043e\u0434\u0430\u0440\u044f \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044e JIT-\u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u0438, \u0432 \u044f\u0434\u0440\u0435 \u0431\u0430\u0439\u0442\u043a\u043e\u0434 \u043d\u0430 \u043b\u0435\u0442\u0443 \u0442\u0440\u0430\u043d\u0441\u043b\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u0432 \u043c\u0430\u0448\u0438\u043d\u043d\u044b\u0435 \u0438\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u0438 \u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u0442\u0441\u044f \u0441 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c\u044e \u043d\u0430\u0442\u0438\u0432\u043d\u043e\u0433\u043e \u043a\u043e\u0434\u0430. \u041f\u0430\u0442\u0447\u0438 \u0441 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u043e\u0439 eBPF \u043f\u0440\u0438\u043d\u044f\u0442\u044b \u0432 \u0432\u0435\u0442\u043a\u0443, \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u0432\u044b\u043f\u0443\u0441\u043a GCC 10. \u041f\u043e\u043c\u0438\u043c\u043e \u0431\u044d\u043a\u0435\u043d\u0434\u0430 \u0434\u043b\u044f \u0433\u0435\u043d\u0435\u0440\u0430\u0446\u0438\u0438 \u0431\u0430\u0439\u0442\u043a\u043e\u0434\u0430 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-37963","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47W sk\u0142ad GCC przyj\u0119to backend do kompilacji w eBPF | ProHoster","description":"W sk\u0142ad zestawu kompilator\u00f3w GCC przyj\u0119to kod do kompilacji program\u00f3w dla wbudowanego w j\u0105dro Linux 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