ELFCTL(1)               FreeBSD General Commands Manual              ELFCTL(1)

NAME
     elfctl - change an ELF binary's feature control note

SYNOPSIS
     elfctl [-h | --help] [-i] [-l] [-e featurelist] file ...

DESCRIPTION
     The elfctl utility modifies feature flags in the feature control note in
     an ELF binary.

     The options are as follows:

     -h | --help
             Print a usage message and exit.

     -i      Ignore unknown feature flags in featurelist.

     -l      List known ELF feature flags.

     -e featurelist
             Edit features from the given comma separated list featurelist.
             featurelist starts with one of the three operations: "+" to turn
             on the features, "-" to turn off the features, "=" to only turn
             on the given features.  A comma separated list of feature names
             or numeric values follows the operation.

     If -e is not specified elfctl displays the status of each feature in the
     ELF note in each file ....

EXIT STATUS
     Exit status is 0 on success, and 1 if the command fails if a file does
     not exist, is too short, or fails to find or edit features note.

EXAMPLES
     The following is an example of a typical usage of the elfctl command:

           elfctl file
           elfctl -e +noaslr file

     Features may be specified as numerical values:

            elfctl -e =0x0001,0x0004 file

     Features may also be specified as a single combined value:

            elfctl -e =0x5 file

HISTORY
     elfctl first appeared in FreeBSD 12.2.

AUTHORS
     elfctl was written by Bora Ozarslan borako.ozarslan@gmail.com under
     sponsorship from the FreeBSD Foundation.

FreeBSD 13.1-RELEASE-p6        February 4, 2022        FreeBSD 13.1-RELEASE-p6