{"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\/hr\/blog\/news\/v-sostav-gcc-prinyat-bekend-dlya-kompilyatsii-v-ebpf","title":{"rendered":"U skup GCC-a prihva\u0107en backend za kompilaciju u eBPF","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

U setu GCC kompajlera usvojen<\/a><\/noindex> kod za kompajliranje programa za interpreter bajtkoda ugra\u0111en u Linux kernel eBPF<\/a><\/noindex>. Zahvaljuju\u0107i upotrebi JIT kompajliranja, bajtkod se u jezgru u trenutku prevodi u ma\u0161inske instrukcije i izvr\u0161ava s performansama nativnog koda. Patchevi sa podr\u0161kom za eBPF su prihva\u0107ene<\/a><\/noindex> u grani koja se koristi za razvoj izdanja GCC 10.<\/p>\n

Osim backend-a za generisanje bajtkoda, GCC uklju\u010duje port libgcc za eBPF i alate za formiranje ELF datoteka, koji omogu\u0107avaju izvr\u0161avanje koda u eBPF virtuelnoj ma\u0161ini koriste\u0107i u\u010ditava\u010de koje pru\u017ea kernel. Patchevi za podr\u0161ku eBPF u GCC pripremljeni su od strane in\u017eenjera iz Oracle-a, koji su prethodno ve\u0107 obezbedili<\/a><\/noindex> podr\u0161ku eBPF u GNU binutils. U razvoju se tako\u0111e nalazi simulator i patchevi za GDB, koji \u0107e omogu\u0107iti debagovanje eBPF programa bez u\u010ditavanja u kernel.<\/p>\n

Programi za eBPF mogu biti defini\u0161u na podskupu jezika C, kompajlirati i u\u010ditati u kernel. Pre izvr\u0161avanja, eBPF interpreter proverava bajtkod na kori\u0161\u0107enje dozvoljenih instrukcija i postavlja odre\u0111ena pravila za kod (na primer, bez petlji).
\nPrvobitno je za kompajliranje eBPF u Linuxu kori\u0161\u0107en alat na bazi LLVM. Podr\u0161ka eBPF u GCC predstavlja interes jer omogu\u0107ava kori\u0161\u0107enje jednog alata za izgradnju Linux kernela i eBPF programa, bez potrebe za instaliranjem dodatnih zavisnosti. <\/p>\n

U obliku eBPF programa mogu se kreirati rukovaoci mre\u017enim operacijama, filtrirati saobra\u0107aj, upravljati propusno\u0161\u0107u, pratiti rad sistema, presretati sistemske pozive, kontrolisati pristup, brojati u\u010destalost i vreme izvr\u0161avanja operacija, sprovoditi pra\u0107enje koriste\u0107i kprobes\/uprobes\/tracepoints.<\/p>\n

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

Izvor: 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 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[…]<\/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\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\udd47U setu GCC prihva\u0107en je backend za kompajliranje u eBPF | ProHoster","description":"U setu GCC kompajlera prihva\u0107en je kod za kompajliranje programa za ugra\u0111eni interpreter u Linux 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