scripts/decode_stacktrace.sh: handle symbols in modules
scripts/decode_stacktrace.sh presently displays module symbols as func+0x0ff/0x5153 [module] Add a third argument: the pathname of a directory where the script should look for the file module.ko so that the output appears as func (foo/bar.c:123) module Without the argument or if the module file isn't found the script prints such symbols as is without decoding. Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>hifive-unleashed-5.1
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8e4f70e218
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310c6dd06a
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@ -2,15 +2,17 @@
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# (c) 2014, Sasha Levin <sasha.levin@oracle.com>
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# (c) 2014, Sasha Levin <sasha.levin@oracle.com>
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#set -x
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#set -x
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if [[ $# != 2 ]]; then
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if [[ $# < 2 ]]; then
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echo "Usage:"
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echo "Usage:"
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echo " $0 [vmlinux] [base path]"
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echo " $0 [vmlinux] [base path] [modules path]"
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exit 1
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exit 1
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fi
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fi
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vmlinux=$1
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vmlinux=$1
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basepath=$2
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basepath=$2
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modpath=$3
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declare -A cache
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declare -A cache
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declare -A modcache
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parse_symbol() {
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parse_symbol() {
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# The structure of symbol at this point is:
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# The structure of symbol at this point is:
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@ -19,6 +21,17 @@ parse_symbol() {
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# For example:
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# For example:
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# do_basic_setup+0x9c/0xbf
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# do_basic_setup+0x9c/0xbf
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if [[ $module == "" ]] ; then
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local objfile=$vmlinux
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elif [[ "${modcache[$module]+isset}" == "isset" ]]; then
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local objfile=${modcache[$module]}
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else
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[[ $modpath == "" ]] && return
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local objfile=$(find "$modpath" -name $module.ko -print -quit)
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[[ $objfile == "" ]] && return
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modcache[$module]=$objfile
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fi
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# Remove the englobing parenthesis
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# Remove the englobing parenthesis
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symbol=${symbol#\(}
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symbol=${symbol#\(}
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symbol=${symbol%\)}
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symbol=${symbol%\)}
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@ -29,11 +42,11 @@ parse_symbol() {
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# Use 'nm vmlinux' to figure out the base address of said symbol.
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# Use 'nm vmlinux' to figure out the base address of said symbol.
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# It's actually faster to call it every time than to load it
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# It's actually faster to call it every time than to load it
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# all into bash.
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# all into bash.
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if [[ "${cache[$name]+isset}" == "isset" ]]; then
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if [[ "${cache[$module,$name]+isset}" == "isset" ]]; then
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local base_addr=${cache[$name]}
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local base_addr=${cache[$module,$name]}
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else
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else
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local base_addr=$(nm "$vmlinux" | grep -i ' t ' | awk "/ $name\$/ {print \$1}" | head -n1)
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local base_addr=$(nm "$objfile" | grep -i ' t ' | awk "/ $name\$/ {print \$1}" | head -n1)
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cache["$name"]="$base_addr"
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cache[$module,$name]="$base_addr"
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fi
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fi
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# Let's start doing the math to get the exact address into the
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# Let's start doing the math to get the exact address into the
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# symbol. First, strip out the symbol total length.
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# symbol. First, strip out the symbol total length.
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@ -48,12 +61,12 @@ parse_symbol() {
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local address=$(printf "%x\n" "$expr")
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local address=$(printf "%x\n" "$expr")
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# Pass it to addr2line to get filename and line number
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# Pass it to addr2line to get filename and line number
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# Could get more than one result
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# Could get more than one result
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if [[ "${cache[$address]+isset}" == "isset" ]]; then
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if [[ "${cache[$module,$address]+isset}" == "isset" ]]; then
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local code=${cache[$address]}
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local code=${cache[$module,$address]}
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else
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else
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local code=$(addr2line -i -e "$vmlinux" "$address")
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local code=$(addr2line -i -e "$objfile" "$address")
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cache[$address]=$code
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cache[$module,$address]=$code
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fi
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fi
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# addr2line doesn't return a proper error code if it fails, so
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# addr2line doesn't return a proper error code if it fails, so
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@ -105,13 +118,23 @@ handle_line() {
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fi
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fi
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done
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done
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# The symbol is the last element, process it
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if [[ ${words[$last]} =~ \[([^]]+)\] ]]; then
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symbol=${words[$last]}
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module=${words[$last]}
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module=${module#\[}
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module=${module%\]}
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symbol=${words[$last-1]}
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unset words[$last-1]
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else
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# The symbol is the last element, process it
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symbol=${words[$last]}
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module=
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fi
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unset words[$last]
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unset words[$last]
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parse_symbol # modifies $symbol
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parse_symbol # modifies $symbol
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# Add up the line number to the symbol
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# Add up the line number to the symbol
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echo "${words[@]}" "$symbol"
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echo "${words[@]}" "$symbol $module"
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}
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}
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while read line; do
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while read line; do
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@ -121,8 +144,8 @@ while read line; do
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handle_line "$line"
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handle_line "$line"
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# Is it a code line?
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# Is it a code line?
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elif [[ $line == *Code:* ]]; then
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elif [[ $line == *Code:* ]]; then
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decode_code "$line"
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decode_code "$line"
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else
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else
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# Nothing special in this line, show it as is
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# Nothing special in this line, show it as is
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echo "$line"
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echo "$line"
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fi
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fi
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