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=head1 NAME
B<fix-gnustack> - query or clear any ELF GNU_STACK executable flag
=head1 SYNOPSIS
B<fix-gnustack> -h
B<fix-gnustack> [-f] ELF
=head1 DESCRIPTION
B<fix-gnustack> scans the program headers of an ELF binary or shared
object library, reports if it has a GNU_STACK entry and if it is
marked both writeable and executable. On PaX hardened kernels where
memory protection (MPROTECT) is enforced, execution of binaries with
GNU_STACKS marked WX, or execution of binaries linking against libraries
with GNU_STACKS marked WX, is terminated by the kernel. When B<fix-gnustack>
is called without the B<-f> option on an ELF, it simply reports the
RWX (read/write/execute) flags on any GNU_STACK entry found. When called
with B<-f>, it clears the X flag if a GNU_STACK entry is found and it
has both W and X flags.
=head1 OPTIONS
=over
=item B<-h>
Print out a short help message and exit.
=item [B<-f>] ELF
"Fix" the ELF, ie, remove the X flag from any GNU_STACK entry found
if it has both W and X flags. When called without, it simply reports
what flags it found.
=back
=head1 HOMEPAGE
http://dev.gentoo.org/~blueness/elfix
=head1 REPORTING BUGS
Please report bugs at http://bugs.gentoo.org.
=head1 SEE ALSO
B<scanelf>(1), B<dumpelf>(1), B<paxctl>(1), B<paxctl-ng>(1), B<pspax>(1).
=head1 AUTHORS
B<Anthony G. Basile> <blueness@gentoo.org>
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