find、nm、grepを使ってシンボル探し。

find_function.sh

# !/bin/bash

target_dir=/lib/modules/`uname -r`/
target_type="ko"
func_name=""

function usage()
{
    echo "usage: $1 -d [directory] -t [objecdt type(e.g. so, ko)] -f [function name]"
    exit -1
}

while getopts d:t:f: option
do
    case $option in
        d)
            target_dir=$OPTARG
            ;;
        t)
            target_type=$OPTARG
            ;;
        f)
            func_name=$OPTARG
            ;;
        \?)
            usage $0
            ;;
    esac
done

if [ "$func_name" = "" ]; then
    usage $0
fi

echo "[-]Directory: $target_dir"
echo "[-]File type: $target_type"
echo "[-]Function : $func_name"

files=`find -L "$target_dir" -name "*.$target_type"`
for f in $files
do
    nm --defined-only $f 2>&1 | grep "$func_name"  > /dev/null 
    if [ $? -eq 0 ]; then
        echo $f
    fi
done

exit 0

.koから探す。

[-]Directory: /lib/modules/3.13.0-rc4-ktest/
[-]File type: ko
[-]Function : ext4_xattr_get
/lib/modules/3.13.0-rc4-ktest/build/fs/ext4/ext4.ko
/lib/modules/3.13.0-rc4-ktest/kernel/fs/ext4/ext4.ko
/lib/modules/3.13.0-rc4-ktest/source/fs/ext4/ext4.ko

.oから探す。

masami@saga:~$ find_function.sh -d ~/linux-kernel/fs -t o -f ext4_xattr_get
[-]Directory: /home/masami/linux-kernel/fs
[-]File type: o
[-]Function : ext4_xattr_get
/home/masami/linux-kernel/fs/ext4/acl.o
/home/masami/linux-kernel/fs/ext4/xattr.o
/home/masami/linux-kernel/fs/ext4/ext4.o

.soから探す。

masami@saga:~$ find_function.sh -d /lib -t so -f printf
[-]Directory: /lib
[-]File type: so
[-]Function : printf
/lib/perl5/core_perl/auto/Devel/PPPort/PPPort.so
/lib/perl5/core_perl/CORE/libperl.so
/lib/libpython2.7.so
/lib/python3.3/config-3.3m/libpython3.3m.so
/lib/libpython3.3m.so
/lib/libc-2.18.so
/lib/libasprintf.so
/lib/libdevmapper.so
/lib/python2.7/config/libpython2.7.so
/lib/libcrypto.so
/lib/ld-2.18.so
/lib/libnss3.so