FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/scripts/paxcheck.sh

     #!/bin/sh
     
     if ! command -v scanelf > /dev/null; then
         echo "scanelf (from pax-utils) is required for these checks." >&2
         exit 3
     fi
     
     RET=0
     
    # check for exec stacks
    OUT=$(scanelf -qyRAF '%e %p' "$1")
    
    if [ x"${OUT}" != x ]; then
        RET=2
        echo "The following files contain writable and executable sections"
        echo " Files with such sections will not work properly (or at all!) on some"
        echo " architectures/operating systems."
        echo " For more information, see:"
        echo "   https://wiki.gentoo.org/wiki/Hardened/GNU_stack_quickstart"
        echo
        echo "${OUT}"
        echo
    fi
    
    
    # check for TEXTRELS
    OUT=$(scanelf -qyRAF '%T %p' "$1")
    
    if [ x"${OUT}" != x ]; then
        RET=2
        echo "The following files contain runtime text relocations"
        echo " Text relocations force the dynamic linker to perform extra"
        echo " work at startup, waste system resources, and may pose a security"
        echo " risk.  On some architectures, the code may not even function"
        echo " properly, if at all."
        echo " For more information, see:"
        echo "   https://wiki.gentoo.org/wiki/Hardened/HOWTO_locate_and_fix_textrels"
        echo
        echo "${OUT}"
        echo
    fi
    
    exit "$RET"

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