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
SEE ALSO
mitigations(7)
HISTORY
elfctl first appeared in FreeBSD 12.2.
AUTHORS
elfctl was written by Bora Ozarslan
[email protected] under
sponsorship from the FreeBSD Foundation.
FreeBSD 14.1-RELEASE-p8 October 5, 2023 FreeBSD 14.1-RELEASE-p8