{"id":104906,"date":"2022-08-21T15:36:41","date_gmt":"2022-08-21T13:36:41","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-standartnoj-si-biblioteki-cosmopolitan-2-0-razvivaemoj-dlya-perenosimyh-ispolnyaemyh-fajlov"},"modified":"2022-08-21T15:36:41","modified_gmt":"2022-08-21T13:36:41","slug":"vypusk-standartnoj-si-biblioteki-cosmopolitan-2-0-razvivaemoj-dlya-perenosimyh-ispolnyaemyh-fajlov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/vypusk-standartnoj-si-biblioteki-cosmopolitan-2-0-razvivaemoj-dlya-perenosimyh-ispolnyaemyh-fajlov","title":{"rendered":"Vydanie \u0161tandardnej C kni\u017enice Cosmopolitan 2.0, vyv\u00edjanej pre prenosn\u00e9 spustite\u013en\u00e9 s\u00fabory","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Bol sa zverejnen\u00fd vydanie projektu Cosmopolitan 2.0, ktor\u00fd rozv\u00edja \u0161tandardn\u00fa C kni\u017enicu a univerz\u00e1lny form\u00e1t spustite\u013en\u00fdch s\u00faborov, ktor\u00fd sa m\u00f4\u017ee pou\u017ei\u0165 na distrib\u00faciu programov pre r\u00f4zne opera\u010dn\u00e9 syst\u00e9my bez pou\u017eitia interpreterov a virtu\u00e1lnych strojov. V\u00fdstup vytvoren\u00fd pomocou GCC a Clang je skompilovan\u00fd do staticky viazan\u00e9ho univerz\u00e1lneho spustite\u013en\u00e9ho s\u00faboru, ktor\u00fd je vhodn\u00fd na spustenie v ak\u00fdchko\u013evek distrib\u00faci\u00e1ch Linuxu, macOS, Windows, FreeBSD, OpenBSD, NetBSD a dokonca aj na vyvolanie z BIOSu. K\u00f3d projektu je distribuovan\u00fd pod licenciou ISC (zjednodu\u0161en\u00e1 verzia MIT\/BSD).         <\/p>\n<p>Kontajner pre formovanie univerz\u00e1lnych spustite\u013en\u00fdch s\u00faborov je zalo\u017een\u00fd na kombin\u00e1cii \u0161pecifick\u00fdch segmentov a hlavi\u010diek pre r\u00f4zne opera\u010dn\u00e9 syst\u00e9my (PE, ELF, MACHO, OPENBSD) v jednom s\u00fabore, ktor\u00fd kombinuje nieko\u013eko r\u00f4znych form\u00e1tov vyu\u017e\u00edvan\u00fdch v Unix, Windows a macOS. Na zabezpe\u010denie spustenia jedn\u00e9ho spustite\u013en\u00e9ho s\u00faboru v syst\u00e9moch Windows a Unix sa pou\u017e\u00edva triky spojen\u00e9 s k\u00f3dovan\u00edm s\u00faborov Windows PE ako shell skriptu, pri\u010dom sa vyu\u017e\u00edva fakt, \u017ee Thompson Shell nepou\u017e\u00edva skriptov\u00fd marker &#171;#!&#187;. Pre vytvorenie programov, ktor\u00e9 zah\u0155\u0148aj\u00fa viac s\u00faborov (zhroma\u017edenie v\u0161etk\u00fdch zdrojov do jedn\u00e9ho s\u00faboru), sa podporuje formovanie spustite\u013en\u00e9ho s\u00faboru ako \u0161peci\u00e1lne form\u00e1tovan\u00e9ho ZIP arch\u00edvu. Sch\u00e9ma navrhnut\u00e9ho form\u00e1tu (pr\u00edklad aplik\u00e1cie hello.com):        <\/p>\n<p>     MZqFpD=&#8217;     BIOS BOOT SECTOR&#8217;     exec 7 $(command -v $0)     printf &#8216;&#092;177ELF&#8230;LINKER-ENCODED-FREEBSD-HEADER&#8217; &gt;&#038;7     exec &#171;$0&#187; &#171;$@&#187;     exec qemu-x86_64 &#171;$0&#187; &#171;$@&#187;     exit 1     REAL MODE&#8230;     ELF SEGMENTS&#8230;     OPENBSD NOTE&#8230;     MACHO HEADERS&#8230;     CODE AND DATA&#8230;     ZIP DIRECTORY&#8230;      <\/p>\n<p>Na za\u010diatku s\u00faboru sa uv\u00e1dza zna\u010dka &#171;MZqFpD&#187;, ktor\u00e1 sa interpretuje ako hlavi\u010dka form\u00e1tu Windows PE. T\u00e1to sekvencia sa tie\u017e dek\u00f3duje na in\u0161trukciu &#171;pop %r10 ; jno 0x4a ; jo 0x4a&#187;, a re\u0165azec &#171;&#092;177ELF&#187; na in\u0161trukciu &#171;jg 0x47&#187;, ktor\u00e9 sa pou\u017e\u00edvaj\u00fa na presmerovanie na vstupn\u00fd bod. V Unix syst\u00e9moch sa vykon\u00e1va shell k\u00f3d, v ktorom sa pou\u017e\u00edva pr\u00edkaz exec s odovzd\u00e1van\u00edm spustite\u013en\u00e9ho k\u00f3du cez anonymn\u00fd kan\u00e1l. Obmedzen\u00edm navrhnutej met\u00f3dy je mo\u017enos\u0165 spustenia v Unix podobn\u00fdch OS len s pou\u017eit\u00edm shellov, ktor\u00e9 podporuj\u00fa re\u017eim sp\u00e4tnej kompatibility s Thompson Shell.       <\/p>\n<p>Volanie qemu-x86_64 je navrhnut\u00e9 na implement\u00e1ciu dodato\u010dnej prenosnosti a umo\u017e\u0148uje spusti\u0165 skompilovan\u00fd k\u00f3d pre architekt\u00faru x86_64 na platform\u00e1ch odli\u0161n\u00fdch od x86, napr\u00edklad na dosk\u00e1ch Raspberry Pi a zariadeniach Apple vybaven\u00fdch procesormi ARM. Projekt m\u00f4\u017ee by\u0165 tie\u017e pou\u017eit\u00fd na vytv\u00e1ranie samostatn\u00fdch aplik\u00e1ci\u00ed, ktor\u00e9 funguj\u00fa bez opera\u010dn\u00e9ho syst\u00e9mu (bare metal). V tak\u00fdch aplik\u00e1ci\u00e1ch je k spustite\u013en\u00e9mu s\u00faboru pripevnen\u00fd bootloader a program funguje ako na\u010d\u00edtate\u013en\u00fd opera\u010dn\u00fd syst\u00e9m.         <\/p>\n<p>V rozv\u00edjanej projekte \u0161tandardnej C kni\u017enici libc je navrhnut\u00fdch 2024 funkci\u00ed (v prvom vydan\u00ed bolo asi 1400 funkci\u00ed). Z h\u013eadiska v\u00fdkonu Cosmopolitan funguje rovnako r\u00fdchlo ako glibc a v\u00fdrazne predbehne Musl a Newlib, pri\u010dom Cosmopolitan je ve\u013ekostne o poriadok men\u0161\u00ed ne\u017e glibc a pribli\u017ene zodpoved\u00e1 Musl a Newlib. Pre optimaliz\u00e1ciu \u010dasto volan\u00fdch funkci\u00ed ako memcpy a strlen sa dodato\u010dne vyu\u017e\u00edva technika &#171;trickle-down performance&#187;, pri ktorej sa pre volanie funkcie pou\u017e\u00edva makro-obal, v ktorom sa kompil\u00e1tor informuje o pou\u017e\u00edvan\u00fdch registroch CPU, \u010do umo\u017e\u0148uje \u0161etri\u0165 zdroje pri uchov\u00e1van\u00ed stavu CPU t\u00fdm, \u017ee sa uchov\u00e1vaj\u00fa len menen\u00e9 registre.    <\/p>\n<p>Medzi zmenami v novom vydan\u00ed:  <\/p>\n<ul>\n<li class=\"l\"> Zmenen\u00fd syst\u00e9m pr\u00edstupu k intern\u00fdm zdrojom v zip s\u00faboroch (pri otv\u00e1ran\u00ed s\u00faborov sa teraz pou\u017e\u00edvaj\u00fa be\u017en\u00e9 cesty \/zip\/... namiesto pr\u00edstupu pomocou prefixu zip:..). Podobne pre pr\u00edstup k diskom vo Windows je teraz mo\u017en\u00e9 pou\u017ei\u0165 cesty typu \u201e\/c\/...\u201c namiesto \u201eC:\/...\u201c.\n<li class=\"l\"> Navrhnut\u00fd nov\u00fd bootloader APE (Actually Portable Executable), ktor\u00fd definuje form\u00e1t univerz\u00e1lnych spustite\u013en\u00fdch s\u00faborov. Nov\u00fd bootloader pou\u017e\u00edva mmap na umiestnenie programu do pam\u00e4te a viacej nemodifikuje obsah za behu. Ak je to potrebn\u00e9, univerz\u00e1lny spustite\u013en\u00fd s\u00fabor m\u00f4\u017ee by\u0165 konvertovan\u00fd na be\u017en\u00e9 spustite\u013en\u00e9 s\u00fabory viazan\u00e9 na jednotliv\u00e9 platformy.\n<li class=\"l\"> Na platforme Linux bola implementovan\u00e1 mo\u017enos\u0165 vyu\u017eitia modulu jadra binfmt_misc na sp\u00fa\u0161\u0165anie APE-programov. Uv\u00e1dza sa, \u017ee vyu\u017eitie binfmt_misc je najr\u00fdchlej\u0161ou met\u00f3dou sp\u00fa\u0161\u0165ania.\n<li class=\"l\"> Pre Linux je navrhnut\u00e1 implement\u00e1cia funk\u010dnosti syst\u00e9mov\u00fdch volan\u00ed pledge() a unveil(), vyv\u00edjan\u00fdch projektom OpenBSD. Poskytuje sa API na pou\u017eitie t\u00fdchto volan\u00ed v programoch v jazykoch C, C++, Python a Redbean, ako aj n\u00e1stroj pledge.com na izol\u00e1ciu \u013eubovo\u013en\u00fdch procesov.\n<li class=\"l\"> Pre zostavenie sa vyu\u017e\u00edva n\u00e1stroj Landlock Make \u2014 ed\u00edcia GNU Make so pr\u00edsnej\u0161ou kontrolou z\u00e1vislost\u00ed a pou\u017eit\u00edm syst\u00e9mov\u00e9ho volania Landlock na izol\u00e1ciu programu od zvy\u0161ku syst\u00e9mu a zv\u00fd\u0161enie efektivity cache. Mo\u017enos\u0165 zostavenia pomocou be\u017en\u00e9ho GNU Make zost\u00e1va zachovan\u00e1 ako vo\u013eba.\n<li class=\"l\"> Boli implementovan\u00e9 funkcie pre viacvl\u00e1knov\u00e9 spracovanie \u2014 _spawn() a _join(), ktor\u00e9 predstavuj\u00fa univerz\u00e1lne obaly nad \u0161pecifick\u00fdmi API pre r\u00f4zne opera\u010dn\u00e9 syst\u00e9my. Pr\u00e1ca na podpore POSIX Threads je taktie\u017e v priebehu.\n<li class=\"l\"> Poskytla sa mo\u017enos\u0165 pou\u017eitia k\u013e\u00fa\u010dov\u00e9ho slova _Thread_local na pou\u017e\u00edvanie samostatn\u00fdch \u00falo\u017e\u00edsk pre ka\u017ed\u00fd vl\u00e1kno (TLS, Thread-Local Storage). Predvolene C runtime inicializuje TLS pre hlavn\u00e9 vl\u00e1kno, \u010do sp\u00f4sobilo zv\u00fd\u0161enie minim\u00e1lnej ve\u013ekosti spustite\u013en\u00e9ho s\u00faboru z 12 na 16 KB.\n<li class=\"l\"> Do spustite\u013en\u00fdch s\u00faborov bola pridan\u00e1 podpora parametrov \u201e--ftrace\u201c a \u201e--strace\u201c na v\u00fdstup do stderr inform\u00e1ci\u00ed o v\u0161etk\u00fdch volaniach funkci\u00ed a syst\u00e9mov\u00fdch volaniach.\n<li class=\"l\"> Pridan\u00e1 podpora syst\u00e9mov\u00e9ho volania closefrom(), podporovan\u00e9ho v Linuxe 5.9+, FreeBSD 8+ a OpenBSD.\n<li class=\"l\"> Na platforme Linux bola zv\u00fd\u0161en\u00e1 v\u00fdkonnos\u0165 volan\u00ed clock_gettime a gettimeofday a\u017e 10-kr\u00e1t v\u010faka vyu\u017eitiu mechanizmu vDSO (virtual dynamic shared object), ktor\u00fd umo\u017e\u0148uje prenies\u0165 obsluhu syst\u00e9mov\u00e9ho volania do priestoru u\u017e\u00edvate\u013ea a vyhn\u00fa\u0165 sa prepinaniam kontextu.\n<li class=\"l\"> Z kni\u017enice Musl boli prenesen\u00e9 matematick\u00e9 funkcie na pr\u00e1cu s komplexn\u00fdmi \u010d\u00edslami. Zr\u00fdchlen\u00e1 pr\u00e1ca mnoh\u00fdch matematick\u00fdch funkci\u00ed.\n<li class=\"l\"> Navrhnut\u00e1 funkcia nointernet(), ktor\u00e1 vyp\u00edna sie\u0165ov\u00e9 mo\u017enosti.\n<li class=\"l\"> Pridan\u00e9 nov\u00e9 funkcie na efekt\u00edvne pripojenie re\u0165azcov: appendd, appendf, appendr, appends, appendw, appendz, kappendf, kvappendf a vappendf.\n<li class=\"l\"> Pridan\u00e1 chr\u00e1nen\u00e1 verzia rodiny funkci\u00ed kprintf(), ur\u010den\u00e1 na pr\u00e1cu pri zv\u00fd\u0161en\u00fdch privil\u00e9gi\u00e1ch.\n<li class=\"l\"> V\u00fdznamne zv\u00fd\u0161en\u00fd v\u00fdkon realiz\u00e1ci\u00ed <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/ssl-sertifikat\/\"   title=\"SSL\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2309\">SSL<\/a>, SHA, curve25519 a RSA.      <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=57663\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Cosmopolitan 2.0, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u0443\u044e \u0421\u0438-\u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0443 \u0438 \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0430\u043b\u044c\u043d\u044b\u0439 \u0444\u043e\u0440\u043c\u0430\u0442 \u0438\u0441\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u044b\u0445 \u0444\u0430\u0439\u043b\u043e\u0432, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0434\u043b\u044f \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c \u0434\u043b\u044f \u0440\u0430\u0437\u043d\u044b\u0445 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u0431\u0435\u0437 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0438\u043d\u0442\u0435\u0440\u043f\u0440\u0435\u0442\u0430\u0442\u043e\u0440\u043e\u0432 \u0438 \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0445 \u043c\u0430\u0448\u0438\u043d. \u041f\u043e\u043b\u0443\u0447\u0430\u0435\u043c\u044b\u0439 \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u0438 \u0432 GCC \u0438 Clang \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u043a\u043e\u043c\u043f\u043e\u043d\u0443\u0435\u0442\u0441\u044f \u0432 \u0441\u0442\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u0441\u0432\u044f\u0437\u044b\u0432\u0430\u0435\u043c\u044b\u0439 \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0430\u043b\u044c\u043d\u044b\u0439 \u0438\u0441\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u044b\u0439 \u0444\u0430\u0439\u043b, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043f\u0440\u0438\u0433\u043e\u0434\u0435\u043d \u0434\u043b\u044f \u0437\u0430\u043f\u0443\u0441\u043a\u0430 \u0432 \u043b\u044e\u0431\u043e\u043c \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0435 Linux, macOS, Windows, [&hellip;]<\/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-104906","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" 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