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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 borako.ozarslan@gmail.com under sponsorship from the FreeBSD Foundation.