Byla dokon\u010dena pr\u00e1ce na matematick\u00e9 form\u00e1ln\u00ed verifikaci spolehlivosti a bezpe\u010dnosti mikroj\u00e1dra seL4 na syst\u00e9mech s architekturou p\u0159\u00edkazov\u00e9ho syst\u00e9mu AArch64. Verifikace se t\u00fdk\u00e1 matematick\u00e9ho d\u016fkazu spr\u00e1vnosti fungov\u00e1n\u00ed seL4, kter\u00fd potvrzuje plnou shodu se specifikacemi definovan\u00fdmi ve form\u00e1ln\u00edm jazyce. D\u016fkaz spolehlivosti umo\u017e\u0148uje pou\u017eit\u00ed seL4 v kritick\u00fdch syst\u00e9mech zalo\u017een\u00fdch na procesorech ARM64, kter\u00e9 vy\u017eaduj\u00ed zv\u00fd\u0161enou \u00farove\u0148 bezpe\u010dnosti a zaji\u0161\u0165uj\u00ed absenci selh\u00e1n\u00ed. <\/p>\n
P\u016fvodn\u011b bylo mikroj\u00e1dro seL4 verifikov\u00e1no pro 32bitov\u00e9 procesory ARM a pozd\u011bji pro 64bitov\u00e9 procesory x86 a RISC-V. Verifikace zaru\u010duje, \u017ee v p\u0159\u00edpad\u011b selh\u00e1n\u00ed v jedn\u00e9 \u010d\u00e1sti syst\u00e9mu se toto selh\u00e1n\u00ed ne\u0161\u00ed\u0159\u00ed na zb\u00fdvaj\u00edc\u00ed syst\u00e9m a jeho kritick\u00e9 \u010d\u00e1sti. V kontextu zaji\u0161t\u011bn\u00ed bezpe\u010dnosti verifikace potvrzuje, \u017ee j\u00e1dro poskytuje odpov\u00eddaj\u00edc\u00ed \u00farove\u0148 izolace aplikac\u00ed, nedovoluje jim p\u0159\u00edstup k informac\u00edm bez autorizace a zaru\u010duje, \u017ee v p\u0159\u00edpad\u011b kompromitace sekund\u00e1rn\u00edch aplikac\u00ed se \u00fatok ne\u0161\u00ed\u0159\u00ed na kritick\u00e9 aplikace. <\/p>\n
Architektura mikroj\u00e1dra seL4 je pozoruhodn\u00e1 t\u00edm, \u017ee odd\u011bluje \u010d\u00e1sti pro spr\u00e1vu prost\u0159edk\u016f j\u00e1dra do prostoru u\u017eivatele a aplikuje na tyto prost\u0159edky stejn\u00e1 p\u0159\u00edstupov\u00e1 omezen\u00ed jako na u\u017eivatelsk\u00e9 prost\u0159edky. Mikroj\u00e1dro neposkytuje hotov\u00e9 vysoce\u00farov\u0148ov\u00e9 abstrakce pro spr\u00e1vu soubor\u016f, proces\u016f, s\u00ed\u0165ov\u00fdch p\u0159ipojen\u00ed atd., m\u00edsto toho poskytuje pouze minim\u00e1ln\u00ed mechanismy pro spr\u00e1vu p\u0159\u00edstupu k fyzick\u00e9mu adresn\u00edmu prostoru, p\u0159eru\u0161en\u00edm a prost\u0159edk\u016fm procesoru. Vysoce\u00farov\u0148ov\u00e9 abstrakce a ovlada\u010de pro interakci s hardwarem jsou implementov\u00e1ny samostatn\u011b nad mikroj\u00e1dr\u00e9m ve form\u011b \u00faloh prov\u00e1d\u011bn\u00fdch na u\u017eivatelsk\u00e9 \u00farovni. P\u0159\u00edstup t\u011bchto \u00faloh k prost\u0159edk\u016fm, kter\u00e9 m\u00e1 mikroj\u00e1dro k dispozici, je organizov\u00e1n prost\u0159ednictv\u00edm stanoven\u00ed pravidel. \u0417\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0430 \u0440\u0430\u0431\u043e\u0442\u0430 \u043d\u0430\u0434 \u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0444\u043e\u0440\u043c\u0430\u043b\u044c\u043d\u043e\u0439 \u0432\u0435\u0440\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0435\u0439 \u043d\u0430\u0434\u0451\u0436\u043d\u043e\u0441\u0442\u0438 \u0438 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0440\u0430\u0431\u043e\u0442\u044b \u043c\u0438\u043a\u0440\u043e\u044f\u0434\u0440\u0430 seL4 \u043d\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u0441 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u043e\u0439 \u043d\u0430\u0431\u043e\u0440\u0430 \u043a\u043e\u043c\u0430\u043d\u0434 AArch64. \u0412\u0435\u0440\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f \u0441\u0432\u043e\u0434\u0438\u0442\u0441\u044f \u043a \u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u043c\u0443 \u0434\u043e\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044c\u0441\u0442\u0432\u0443 \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e\u0441\u0442\u0438 \u0440\u0430\u0431\u043e\u0442\u044b seL4, \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u0441\u0432\u0438\u0434\u0435\u0442\u0435\u043b\u044c\u0441\u0442\u0432\u0443\u0435\u0442 \u043e \u043f\u043e\u043b\u043d\u043e\u043c \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0438\u0438 \u0437\u0430\u0434\u0430\u043d\u043d\u044b\u043c \u043d\u0430 \u0444\u043e\u0440\u043c\u0430\u043b\u044c\u043d\u043e\u043c \u044f\u0437\u044b\u043a\u0435 \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f\u043c. \u0414\u043e\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044c\u0441\u0442\u0432\u043e \u043d\u0430\u0434\u0451\u0436\u043d\u043e\u0441\u0442\u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c seL4 \u0432 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u0432\u0430\u0436\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u043d\u0430 \u0431\u0430\u0437\u0435 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043e\u0432 ARM64, \u0442\u0440\u0435\u0431\u0443\u044e\u0449\u0438\u0445 \u043f\u043e\u0432\u044b\u0448\u0435\u043d\u043d\u043e\u0433\u043e \u0443\u0440\u043e\u0432\u043d\u044f \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0438 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Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"