blob: edde8250195c5097a73df194f4d5b3a09f142560
1 | #!/bin/bash |
2 | # (c) 2014, Sasha Levin <sasha.levin@oracle.com> |
3 | #set -x |
4 | |
5 | if [[ $# < 2 ]]; then |
6 | echo "Usage:" |
7 | echo " $0 [vmlinux] [base path] [modules path]" |
8 | exit 1 |
9 | fi |
10 | |
11 | vmlinux=$1 |
12 | basepath=$2 |
13 | modpath=$3 |
14 | declare -A cache |
15 | declare -A modcache |
16 | |
17 | parse_symbol() { |
18 | # The structure of symbol at this point is: |
19 | # ([name]+[offset]/[total length]) |
20 | # |
21 | # For example: |
22 | # do_basic_setup+0x9c/0xbf |
23 | |
24 | if [[ $module == "" ]] ; then |
25 | local objfile=$vmlinux |
26 | elif [[ "${modcache[$module]+isset}" == "isset" ]]; then |
27 | local objfile=${modcache[$module]} |
28 | else |
29 | [[ $modpath == "" ]] && return |
30 | local objfile=$(find "$modpath" -name $module.ko -print -quit) |
31 | [[ $objfile == "" ]] && return |
32 | modcache[$module]=$objfile |
33 | fi |
34 | |
35 | # Remove the englobing parenthesis |
36 | symbol=${symbol#\(} |
37 | symbol=${symbol%\)} |
38 | |
39 | # Strip the symbol name so that we could look it up |
40 | local name=${symbol%+*} |
41 | |
42 | # Use 'nm vmlinux' to figure out the base address of said symbol. |
43 | # It's actually faster to call it every time than to load it |
44 | # all into bash. |
45 | if [[ "${cache[$module,$name]+isset}" == "isset" ]]; then |
46 | local base_addr=${cache[$module,$name]} |
47 | else |
48 | local base_addr=$(nm "$objfile" | grep -i ' t ' | awk "/ $name\$/ {print \$1}" | head -n1) |
49 | cache[$module,$name]="$base_addr" |
50 | fi |
51 | # Let's start doing the math to get the exact address into the |
52 | # symbol. First, strip out the symbol total length. |
53 | local expr=${symbol%/*} |
54 | |
55 | # Now, replace the symbol name with the base address we found |
56 | # before. |
57 | expr=${expr/$name/0x$base_addr} |
58 | |
59 | # Evaluate it to find the actual address |
60 | expr=$((expr)) |
61 | local address=$(printf "%x\n" "$expr") |
62 | |
63 | # Pass it to addr2line to get filename and line number |
64 | # Could get more than one result |
65 | if [[ "${cache[$module,$address]+isset}" == "isset" ]]; then |
66 | local code=${cache[$module,$address]} |
67 | else |
68 | local code=$(addr2line -i -e "$objfile" "$address") |
69 | cache[$module,$address]=$code |
70 | fi |
71 | |
72 | # addr2line doesn't return a proper error code if it fails, so |
73 | # we detect it using the value it prints so that we could preserve |
74 | # the offset/size into the function and bail out |
75 | if [[ $code == "??:0" ]]; then |
76 | return |
77 | fi |
78 | |
79 | # Strip out the base of the path |
80 | code=${code//^$basepath/""} |
81 | |
82 | # In the case of inlines, move everything to same line |
83 | code=${code//$'\n'/' '} |
84 | |
85 | # Replace old address with pretty line numbers |
86 | symbol="$name ($code)" |
87 | } |
88 | |
89 | decode_code() { |
90 | local scripts=`dirname "${BASH_SOURCE[0]}"` |
91 | |
92 | echo "$1" | $scripts/decodecode |
93 | } |
94 | |
95 | handle_line() { |
96 | local words |
97 | |
98 | # Tokenize |
99 | read -a words <<<"$1" |
100 | |
101 | # Remove hex numbers. Do it ourselves until it happens in the |
102 | # kernel |
103 | |
104 | # We need to know the index of the last element before we |
105 | # remove elements because arrays are sparse |
106 | local last=$(( ${#words[@]} - 1 )) |
107 | |
108 | for i in "${!words[@]}"; do |
109 | # Remove the address |
110 | if [[ ${words[$i]} =~ \[\<([^]]+)\>\] ]]; then |
111 | unset words[$i] |
112 | fi |
113 | |
114 | # Format timestamps with tabs |
115 | if [[ ${words[$i]} == \[ && ${words[$i+1]} == *\] ]]; then |
116 | unset words[$i] |
117 | words[$i+1]=$(printf "[%13s\n" "${words[$i+1]}") |
118 | fi |
119 | done |
120 | |
121 | if [[ ${words[$last]} =~ \[([^]]+)\] ]]; then |
122 | module=${words[$last]} |
123 | module=${module#\[} |
124 | module=${module%\]} |
125 | symbol=${words[$last-1]} |
126 | unset words[$last-1] |
127 | else |
128 | # The symbol is the last element, process it |
129 | symbol=${words[$last]} |
130 | module= |
131 | fi |
132 | |
133 | unset words[$last] |
134 | parse_symbol # modifies $symbol |
135 | |
136 | # Add up the line number to the symbol |
137 | echo "${words[@]}" "$symbol $module" |
138 | } |
139 | |
140 | while read line; do |
141 | # Let's see if we have an address in the line |
142 | if [[ $line =~ \[\<([^]]+)\>\] ]]; then |
143 | # Translate address to line numbers |
144 | handle_line "$line" |
145 | # Is it a code line? |
146 | elif [[ $line == *Code:* ]]; then |
147 | decode_code "$line" |
148 | else |
149 | # Nothing special in this line, show it as is |
150 | echo "$line" |
151 | fi |
152 | done |
153 |