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