debian x64 os binfmts qemu i386

在 debina x64 os 執行 i386的 exe檔會很慢 或是會出錯。



https://manpages.debian.org/testing/binfmt-support/update-binfmts.8.en.html


update-binfmts --display



i386 (disabled):
     package = <local>
        type = magic
      offset = 0
       magic = \x7fELF\x01\x01\x01\x03\x00\x00\x00\x00\x00\x00\x00\x00\x03\x00\x03\x00\x01\x00\x00\x00
        mask = \xff\xff\xff\xff\xff\xff\xff\xfc\xff\xff\xff\xff\xff\xff\xff\xff\xf8\xff\xff\xff\xff\xff\xff\xff
interpreter = /usr/bin/qemu-i386-static
    detector =


update-binfmts --remove i386 /usr/bin/qemu-i386-static


update-binfmts: warning: no executable /usr/bin/qemu-i386-static found, but continuing anyway as you request



i386

https://coldnew.github.io/5cecf128/

透過 binfmt_misc 讓 Linux 可以執行不同格式的執



cat /proc/sys/fs/binfmt_misc/i386
enabled
interpreter /usr/bin/qemu-i386-static
flags:
offset 0
magic 7f454c460101010300000000000000000300030001000000
mask fffffffffffffffcfffffffffffffffff8ffffffffffffff


https://www.kernel.org/doc/Documentation/admin-guide/binfmt-misc.rst


echo -1 > /proc/sys/fs/binfmt_misc/i386