Utility script to load debug symbols for Linux kernel modules into GDB

module-symbols.sh

#!/bin/bash -ue

MODULE=$1
SYMBOL_PATH_BASE=usr/lib/debug
SYS_MODULES_BASE=/sys/module
MODULES_BASE=/lib/modules/`uname -r`/

function go() {
    MODULE_NAME=$1
    SECTIONS_PATH=$SYS_MODULES_BASE/`echo $MODULE_NAME | sed s/-/_/g`/sections
    TEXT=$(sudo cat $SECTIONS_PATH/.text)
    echo -n "$TEXT "
    for sect in `ls -A $SECTIONS_PATH | grep -v ^.text$`; do
        echo -n "-s $sect `sudo cat $SECTIONS_PATH/$sect` "
    done
    echo
}

if `modprobe --show-depends $MODULE > /dev/null 2>&1`; then
    echo "Known module, listing with dependencies:"
    echo
    modprobe --show-depends $MODULE | while read line; do
        if `echo $line | grep ^insmod 2>&1 > /dev/null`; then
            MODULE_PATH=$(echo $line | sed 's/^insmod //g')
            MODULE_NAME=$(basename $MODULE_PATH .ko)
            echo -n "add-symbol-file $SYMBOL_PATH_BASE$MODULE_PATH "
            go $MODULE_NAME
        fi
    done
else
    echo "Unknown module, listing without dependencies, prefix with 'add-symbol-file <file> ' accordingly:"
    echo
    go $MODULE
fi