The BSDun project has been released, developing a module for the Linux kernel that allows recognizing, loading, and executing unmodified ELF executable files compiled for FreeBSD in Linux. It uses a simulated FreeBSD environment hosted in the \/compat\/freebsd directory. Overall, the project is the complete opposite of FreeBSD's Linuxulator. The code is distributed under the GPLv2+ license and was written with the assistance of the AI assistant Claude Code. <\/p>\n
With the help of BSDun, it became possible to successfully run many applications from FreeBSD packages on Linux, including pkg, nginx, mc, ping, xeyes, xfce4-panel, Thunar, xfce4-terminal, Libreoffice, Midori, Epiphany, Chromium, and VScode. To run Chromium and VScode, you need to disable sandbox isolation and limit the video memory size using the options \"--no-sandbox --force-gpu-mem-available-mb=1024.\" <\/p>\n
The module does not aim to be included in the main kernel, since since the removal of the Solaris ABI, the Linux kernel architecture does not allow the inclusion of other executable file handlers (OS Personalities) and only provides for a single syscall table. To circumvent this issue, BSDun employs the kprobe mechanism to intercept all system calls. <\/p>\n
Using kprobe, FreeBSD system calls were separated from Linux system calls and wrapped into a separate table. Some FreeBSD system calls were directly linked to Linux system calls, while others required re-packaging of the parameter and return structures, some were replaced with stubs (such as those related to Capcicum), and others were based on internal structures of the Linux kernel. For implementing the kevent\/kqueue mechanism over epoll(), a modification of user-space components was separately applied, automatically occurring upon loading each FreeBSD executable. <\/p>\n
A total of about 250 system calls have been implemented. SystemV IPC, networking functions, futexes, sysctl MIB, prctl, timers, and ioctl have also been implemented. For file system isolation, a chroot environment was used on the Linux side (during experiments without chroot, the author executed \"pkg install ...\" which overwrote the contents of \/usr\/local\/* in Linux). Nevertheless, some utilities can still work without chroot. <\/p>\n
The proposed module can be used for the development, building, and porting of software for FreeBSD without using of virtual machines<\/a>. Quick usage instructions: make make load .\/bsdun-freebsd-root-resetup.sh .\/bsdun-freebsd-enter.sh uname -a FreeBSD host 16.0-CURRENT FreeBSD 16.0-CURRENT (bsdun) amd64 \u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u043f\u0440\u043e\u0435\u043a\u0442 BSDun, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0438\u0439 \u043c\u043e\u0434\u0443\u043b\u044c \u0434\u043b\u044f \u044f\u0434\u0440\u0430 Linux, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0439 \u0440\u0430\u0441\u043f\u043e\u0437\u043d\u0430\u0432\u0430\u0442\u044c, \u0437\u0430\u0433\u0440\u0443\u0436\u0430\u0442\u044c \u0438 \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u0442\u044c \u0432 Linux \u043d\u0435\u043c\u043e\u0434\u0438\u0444\u0438\u0446\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0435 \u0438\u0441\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u044b\u0435 \u0444\u0430\u0439\u043b\u044b \u0432 \u0444\u043e\u0440\u043c\u0430\u0442\u0435 ELF, \u0441\u043e\u0431\u0440\u0430\u043d\u043d\u044b\u0435 \u0434\u043b\u044f FreeBSD. \u0414\u043b\u044f \u0437\u0430\u043f\u0443\u0441\u043a\u0430 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f \u044d\u043c\u0443\u043b\u0438\u0440\u0443\u0435\u043c\u043e\u0435 \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u0435 FreeBSD, \u0440\u0430\u0437\u043c\u0435\u0449\u0430\u0435\u043c\u043e\u0435 \u0432 \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u0435 \/compat\/freebsd. \u0412 \u0446\u0435\u043b\u043e\u043c \u043f\u0440\u043e\u0435\u043a\u0442 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u043b\u043d\u043e\u0439 \u043f\u0440\u043e\u0442\u0438\u0432\u043e\u043f\u043e\u043b\u043e\u0436\u043d\u043e\u0441\u0442\u044c\u044e FreeBSD Linuxulator. \u041a\u043e\u0434 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 GPLv2+ \u0438 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c AI-\u0430\u0441\u0441\u0438\u0441\u0442\u0435\u043d\u0442\u0430 Claude Code. \u041f\u0440\u0438 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-182472","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\n","aioseo_head_json":{"title":"\ud83e\udd47 BSDun published, a module for running FreeBSD executable files in Linux | ProHoster","description":"The BSDun project has been published, developing a module for the Linux kernel that allows recognizing, loading, and executing unmodified ELF format executable files compiled for FreeBSD in Linux.","canonical_url":"https:\/\/prohoster.info\/en\/blog\/news\/opublikovan-bsdun-modul-dlya-zapuska-ispolnyaemyh-fajlov-freebsd-v-linux","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"en_US","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d BSDun, \u043c\u043e\u0434\u0443\u043b\u044c \u0434\u043b\u044f \u0437\u0430\u043f\u0443\u0441\u043a\u0430 \u0438\u0441\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u044b\u0445 \u0444\u0430\u0439\u043b\u043e\u0432 FreeBSD \u0432 Linux | ProHoster","og:description":"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u043f\u0440\u043e\u0435\u043a\u0442 BSDun, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0438\u0439 \u043c\u043e\u0434\u0443\u043b\u044c \u0434\u043b\u044f \u044f\u0434\u0440\u0430 Linux, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0439 \u0440\u0430\u0441\u043f\u043e\u0437\u043d\u0430\u0432\u0430\u0442\u044c, \u0437\u0430\u0433\u0440\u0443\u0436\u0430\u0442\u044c \u0438 \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u0442\u044c \u0432 Linux \u043d\u0435\u043c\u043e\u0434\u0438\u0444\u0438\u0446\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0435 \u0438\u0441\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u044b\u0435 \u0444\u0430\u0439\u043b\u044b \u0432 \u0444\u043e\u0440\u043c\u0430\u0442\u0435 ELF, \u0441\u043e\u0431\u0440\u0430\u043d\u043d\u044b\u0435 \u0434\u043b\u044f FreeBSD.","og:url":"https:\/\/prohoster.info\/en\/blog\/news\/opublikovan-bsdun-modul-dlya-zapuska-ispolnyaemyh-fajlov-freebsd-v-linux","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2026-07-05T14:54:28+00:00","article:modified_time":"2026-07-05T14:54:28+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"182472","title":null,"description":null,"keywords":null,"keyphrases":{"focus":[],"additional":[]},"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":null,"breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2026-08-05 12:22:09","updated":"2026-08-05 12:22:09","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/en\/wp-json\/wp\/v2\/posts\/182472","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/en\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/en\/wp-json\/wp\/v2\/comments?post=182472"}],"version-history":[{"count":1,"href":"https:\/\/prohoster.info\/en\/wp-json\/wp\/v2\/posts\/182472\/revisions"}],"predecessor-version":[{"id":182568,"href":"https:\/\/prohoster.info\/en\/wp-json\/wp\/v2\/posts\/182472\/revisions\/182568"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/en\/wp-json\/wp\/v2\/media?parent=182472"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/en\/wp-json\/wp\/v2\/categories?post=182472"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/en\/wp-json\/wp\/v2\/tags?post=182472"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n
Source: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"