Binfmt misc information

binfmt_misc (Miscellaneous Binary Format) is a capability of the Linux kernel which allows arbitrary executable file formats to be recognized and passed to certain user space applications, such as emulators and virtual machines.^[1] It is one of a number of binary format handlers in the kernel that are involved in preparing a user-space program to run.^[2]

The executable formats are registered through the special purpose file system binfmt_misc file-system interface (usually mounted under part of /proc). This is either done directly by sending special sequences to the register procfs file or using a wrapper like Debian-based distributions binfmt-support package^[3] or systemd's systemd-binfmt.service.^[4][5]