{"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\/da\/blog\/news\/v-sostav-gcc-prinyat-bekend-dlya-kompilyatsii-v-ebpf","title":{"rendered":"GCC har inkluderet en backend til kompilering til eBPF","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

GCC-kompilatorernes sammens\u00e6tning vedtaget<\/a><\/noindex> kode til kompilering af programmer til den indbyggede bytecode-interpreter i Linux-kernen eBPF<\/a><\/noindex>. Takket v\u00e6re anvendelsen af JIT-kompilering bliver bytecode l\u00f8bende oversat til maskininstruktioner og udf\u00f8rt med ydelse som native kode. Patcher med st\u00f8tte til eBPF er blevet vedtaget<\/a><\/noindex> i den gren, som udviklingen af GCC 10 er baseret p\u00e5.<\/p>\n

Ud over backend til generation af bytecode, inkluderer GCC en port af libgcc til eBPF og v\u00e6rkt\u00f8jer til at danne ELF-filer, der muligg\u00f8r udf\u00f8relse af kode i eBPF's virtuelle maskine ved hj\u00e6lp af de drivere, som kernen stiller til r\u00e5dighed. Patcher til eBPF-support i GCC er udarbejdet af ingeni\u00f8rer fra Oracle, som tidligere allerede har sikret<\/a><\/noindex> st\u00f8tte til eBPF i GNU binutils. Der er ogs\u00e5 en simulator og patches til GDB under udvikling, som vil muligg\u00f8re debugging af eBPF-programmer uden indl\u00e6sning i kernen.<\/p>\n

Programmer til eBPF kan defineres i et delm\u00e6ngde af C-sproget, kompileres og indl\u00e6ses i kernen. F\u00f8r udf\u00f8relse kontrollerer eBPF-interpreteren bytecode for anvendelse af tilladte instruktioner og p\u00e5l\u00e6gger visse regler p\u00e5 koden (f.eks. frav\u00e6r af loops).
\nOprindeligt blev v\u00e6rkt\u00f8jet til kompilering af eBPF i Linux baseret p\u00e5 LLVM. St\u00f8tten til eBPF i GCC er interessant, da den muligg\u00f8r brugen af \u00e9t v\u00e6rkt\u00f8j til at bygge b\u00e5de Linux-kernen og eBPF-programmer uden installation af yderligere afh\u00e6ngigheder. <\/p>\n

I form af eBPF-programmer kan der oprettes h\u00e5ndteringsfunktioner for netv\u00e6rksoperationer, filtrering af trafik, h\u00e5ndtering af b\u00e5ndbredde, systemoverv\u00e5gning, opfangning af systemopkald, kontrol af adgang, t\u00e6lling af hyppighed og udf\u00f8relsestid for operationer og udf\u00f8relse af tracing ved hj\u00e6lp af kprobes\/uprobes\/tracepoints.<\/p>\n

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

Kilde: 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\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\udd47GCC har accepteret en backend til kompilering til eBPF | ProHoster","description":"GCC-kompilatorernes sammens\u00e6tning inkluderer kode til kompilering af programmer til den indbyggede interpreter i 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