linux-imx

#!/bin/bash

# SPDX-License-Identifier: GPL-2.0

# (c) 2014, Sasha Levin <sasha.levin@oracle.com>

#set -x

​

if [[ $# < 2 ]]; then

    echo "Usage:"

    echo "  $0 [vmlinux] [base path] [modules path]"

    exit 1

fi

​

vmlinux=$1

basepath=$2

modpath=$3

declare -A cache

declare -A modcache

​

parse_symbol() {

    # The structure of symbol at this point is:

    #   ([name]+[offset]/[total length])

    #

    # For example:

    #   do_basic_setup+0x9c/0xbf

​

    if [[ $module == "" ]] ; then

        local objfile=$vmlinux

    elif [[ "${modcache[$module]+isset}" == "isset" ]]; then

        local objfile=${modcache[$module]}

    else

        [[ $modpath == "" ]] && return

        local objfile=$(find "$modpath" -name $module.ko -print -quit)

        [[ $objfile == "" ]] && return

        modcache[$module]=$objfile

    fi

​

    # Remove the englobing parenthesis

    symbol=${symbol#\(}

    symbol=${symbol%\)}

​

    # Strip segment

    local segment

    if [[ $symbol == *:* ]] ; then

        segment=${symbol%%:*}:

        symbol=${symbol#*:}

    fi

​

    # Strip the symbol name so that we could look it up

    local name=${symbol%+*}

​

    # Use 'nm vmlinux' to figure out the base address of said symbol.

    # It's actually faster to call it every time than to load it

    # all into bash.

    if [[ "${cache[$module,$name]+isset}" == "isset" ]]; then

        local base_addr=${cache[$module,$name]}

    else

        local base_addr=$(nm "$objfile" | grep -i ' t ' | awk "/ $name\$/ {print \$1}" | head -n1)

        cache[$module,$name]="$base_addr"

    fi

    # Let's start doing the math to get the exact address into the

    # symbol. First, strip out the symbol total length.

    local expr=${symbol%/*}

​

    # Now, replace the symbol name with the base address we found