1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3# (c) 2014, Sasha Levin <sasha.levin@oracle.com> 4#set -x 5 6if [[ $# < 2 ]]; then 7 echo "Usage:" 8 echo " $0 [vmlinux] [base path] [modules path]" 9 exit 1 10fi 11 12vmlinux=$1 13basepath=$2 14modpath=$3 15declare -A cache 16declare -A modcache 17 18parse_symbol() { 19 # The structure of symbol at this point is: 20 # ([name]+[offset]/[total length]) 21 # 22 # For example: 23 # do_basic_setup+0x9c/0xbf 24 25 if [[ $module == "" ]] ; then 26 local objfile=$vmlinux 27 elif [[ "${modcache[$module]+isset}" == "isset" ]]; then 28 local objfile=${modcache[$module]} 29 else 30 [[ $modpath == "" ]] && return 31 local objfile=$(find "$modpath" -name "${module//_/[-_]}.ko*" -print -quit) 32 [[ $objfile == "" ]] && return 33 modcache[$module]=$objfile 34 fi 35 36 # Remove the englobing parenthesis 37 symbol=${symbol#\(} 38 symbol=${symbol%\)} 39 40 # Strip segment 41 local segment 42 if [[ $symbol == *:* ]] ; then 43 segment=${symbol%%:*}: 44 symbol=${symbol#*:} 45 fi 46 47 # Strip the symbol name so that we could look it up 48 local name=${symbol%+*} 49 50 # Use 'nm vmlinux' to figure out the base address of said symbol. 51 # It's actually faster to call it every time than to load it 52 # all into bash. 53 if [[ "${cache[$module,$name]+isset}" == "isset" ]]; then 54 local base_addr=${cache[$module,$name]} 55 else 56 local base_addr=$(nm "$objfile" | grep -i ' t ' | awk "/ $name\$/ {print \$1}" | head -n1) 57 cache[$module,$name]="$base_addr" 58 fi 59 # Let's start doing the math to get the exact address into the 60 # symbol. First, strip out the symbol total length. 61 local expr=${symbol%/*} 62 63 # Now, replace the symbol name with the base address we found 64 # before. 65 expr=${expr/$name/0x$base_addr} 66 67 # Evaluate it to find the actual address 68 expr=$((expr)) 69 local address=$(printf "%x\n" "$expr") 70 71 # Pass it to addr2line to get filename and line number 72 # Could get more than one result 73 if [[ "${cache[$module,$address]+isset}" == "isset" ]]; then 74 local code=${cache[$module,$address]} 75 else 76 local code=$(${CROSS_COMPILE}addr2line -i -e "$objfile" "$address") 77 cache[$module,$address]=$code 78 fi 79 80 # addr2line doesn't return a proper error code if it fails, so 81 # we detect it using the value it prints so that we could preserve 82 # the offset/size into the function and bail out 83 if [[ $code == "??:0" ]]; then 84 return 85 fi 86 87 # Strip out the base of the path 88 code=${code#$basepath/} 89 90 # In the case of inlines, move everything to same line 91 code=${code//$'\n'/' '} 92 93 # Replace old address with pretty line numbers 94 symbol="$segment$name ($code)" 95} 96 97decode_code() { 98 local scripts=`dirname "${BASH_SOURCE[0]}"` 99 100 echo "$1" | $scripts/decodecode 101} 102 103handle_line() { 104 local words 105 106 # Tokenize 107 read -a words <<<"$1" 108 109 # Remove hex numbers. Do it ourselves until it happens in the 110 # kernel 111 112 # We need to know the index of the last element before we 113 # remove elements because arrays are sparse 114 local last=$(( ${#words[@]} - 1 )) 115 116 for i in "${!words[@]}"; do 117 # Remove the address 118 if [[ ${words[$i]} =~ \[\<([^]]+)\>\] ]]; then 119 unset words[$i] 120 fi 121 122 # Format timestamps with tabs 123 if [[ ${words[$i]} == \[ && ${words[$i+1]} == *\] ]]; then 124 unset words[$i] 125 words[$i+1]=$(printf "[%13s\n" "${words[$i+1]}") 126 fi 127 done 128 129 if [[ ${words[$last]} =~ \[([^]]+)\] ]]; then 130 module=${words[$last]} 131 module=${module#\[} 132 module=${module%\]} 133 symbol=${words[$last-1]} 134 unset words[$last-1] 135 else 136 # The symbol is the last element, process it 137 symbol=${words[$last]} 138 module= 139 fi 140 141 unset words[$last] 142 parse_symbol # modifies $symbol 143 144 # Add up the line number to the symbol 145 echo "${words[@]}" "$symbol $module" 146} 147 148while read line; do 149 # Let's see if we have an address in the line 150 if [[ $line =~ \[\<([^]]+)\>\] ]] || 151 [[ $line =~ [^+\ ]+\+0x[0-9a-f]+/0x[0-9a-f]+ ]]; then 152 # Translate address to line numbers 153 handle_line "$line" 154 # Is it a code line? 155 elif [[ $line == *Code:* ]]; then 156 decode_code "$line" 157 else 158 # Nothing special in this line, show it as is 159 echo "$line" 160 fi 161done 162