{"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\/ro\/blog\/news\/v-sostav-gcc-prinyat-bekend-dlya-kompilyatsii-v-ebpf","title":{"rendered":"\u00cen GCC a fost acceptat un backend pentru compilarea \u00een eBPF","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Setul de compilatoare GCC acceptat<\/a><\/noindex> cod pentru compilarea programelor pentru interpretatorul de bytecode \u00eencorporat \u00een nucleul Linux eBPF<\/a><\/noindex>. Datorit\u0103 utiliz\u0103rii compil\u0103rii JIT, \u00een nucleu bytecode-ul este \u00een timp real transformat \u00een instruc\u021biuni ma\u0219in\u0103 \u0219i executat cu performan\u021ba codului nativ. Patch-uri cu suport pentru eBPF acceptate<\/a><\/noindex> \u00een ramura de dezvoltare a versiunii GCC 10.<\/p>\n

Pe l\u00e2ng\u0103 backend-ul pentru generarea bytecode-ului, GCC include un port libgcc pentru eBPF \u0219i instrumente pentru generarea fi\u0219ierelor ELF, care permit executarea codului \u00een ma\u0219ina virtual\u0103 eBPF folosind \u00eenc\u0103rc\u0103toarele furnizate de nucleu. Patch-uri pentru suportul eBPF \u00een GCC au fost preg\u0103tite de inginerii de la Oracle, care anterior au asigurat<\/a><\/noindex> suportul eBPF \u00een GNU binutils. De asemenea, se afl\u0103 \u00een dezvoltare un simulator \u0219i patch-uri pentru GDB, care vor permite depanarea programelor eBPF f\u0103r\u0103 a fi \u00eenc\u0103rcate \u00een nucleu.<\/p>\n

Programele pentru eBPF pot fi definite pe un subset al limbajului C, compilate \u0219i \u00eenc\u0103rcate \u00een nucleu. \u00cenainte de executare, interpretatorul eBPF verific\u0103 bytecode-ul pentru utilizarea instruc\u021biunilor permise \u0219i impune anumite reguli asupra codului (de exemplu, absen\u021ba buclelor).
\nIni\u021bial, pentru compilarea eBPF \u00een Linux era utilizat un instrumentar bazat pe LLVM. Suportul eBPF \u00een GCC este interesant deoarece permite utilizarea aceluia\u0219i instrumentar pentru a construi nucleul Linux \u0219i programele eBPF, f\u0103r\u0103 a instala dependen\u021be suplimentare. <\/p>\n

Sub form\u0103 de programe eBPF, pot fi create manipulatoare pentru opera\u021biuni de re\u021bea, se poate filtra traficul, gestiona l\u0103\u021bimea de band\u0103, monitoriza func\u021bionarea sistemelor, intercepta apelurile de sistem, controla accesul, num\u0103ra frecven\u021ba \u0219i timpul execu\u021biei opera\u021biunilor, efectua tras\u0103ri folosind kprobes\/uprobes\/tracepoints.<\/p>\n

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

Sursa: opennet.ro<\/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\udd47Setul GCC a acceptat backend-ul pentru compilarea \u00een eBPF | ProHoster","description":"Setul de compilatoare GCC a adoptat codul pentru compilarea programelor pentru interpretatorul \u00eencorporat \u00een nucleul 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