mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Evan Green](/assets/img/avatar_default.png)
The manpage for modprobe mentions that dashes and underscores are treated interchangeably in module names. The stack trace dumps seem to print module names with underscores. Use bash to replace _ with the pattern [-_] so that file names with dashes or underscores can be found. For example, this line: [ 27.919759] hda_widget_sysfs_init+0x2b8/0x3a5 [snd_hda_core] should find a module named snd-hda-core.ko. Link: http://lkml.kernel.org/r/20190531205926.42474-1-evgreen@chromium.org Signed-off-by: Evan Green <evgreen@chromium.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Acked-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Douglas Anderson <dianders@chromium.org> Cc: Evan Green <evgreen@chromium.org> Cc: Nicolas Boichat <drinkcat@chromium.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Manuel Traut <manut@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
161 lines
3.9 KiB
Bash
Executable file
161 lines
3.9 KiB
Bash
Executable file
#!/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=${symbol%/*}
|
|
|
|
# Now, replace the symbol name with the base address we found
|
|
# before.
|
|
expr=${expr/$name/0x$base_addr}
|
|
|
|
# Evaluate it to find the actual address
|
|
expr=$((expr))
|
|
local address=$(printf "%x\n" "$expr")
|
|
|
|
# Pass it to addr2line to get filename and line number
|
|
# Could get more than one result
|
|
if [[ "${cache[$module,$address]+isset}" == "isset" ]]; then
|
|
local code=${cache[$module,$address]}
|
|
else
|
|
local code=$(${CROSS_COMPILE}addr2line -i -e "$objfile" "$address")
|
|
cache[$module,$address]=$code
|
|
fi
|
|
|
|
# addr2line doesn't return a proper error code if it fails, so
|
|
# we detect it using the value it prints so that we could preserve
|
|
# the offset/size into the function and bail out
|
|
if [[ $code == "??:0" ]]; then
|
|
return
|
|
fi
|
|
|
|
# Strip out the base of the path
|
|
code=${code#$basepath/}
|
|
|
|
# In the case of inlines, move everything to same line
|
|
code=${code//$'\n'/' '}
|
|
|
|
# Replace old address with pretty line numbers
|
|
symbol="$segment$name ($code)"
|
|
}
|
|
|
|
decode_code() {
|
|
local scripts=`dirname "${BASH_SOURCE[0]}"`
|
|
|
|
echo "$1" | $scripts/decodecode
|
|
}
|
|
|
|
handle_line() {
|
|
local words
|
|
|
|
# Tokenize
|
|
read -a words <<<"$1"
|
|
|
|
# Remove hex numbers. Do it ourselves until it happens in the
|
|
# kernel
|
|
|
|
# We need to know the index of the last element before we
|
|
# remove elements because arrays are sparse
|
|
local last=$(( ${#words[@]} - 1 ))
|
|
|
|
for i in "${!words[@]}"; do
|
|
# Remove the address
|
|
if [[ ${words[$i]} =~ \[\<([^]]+)\>\] ]]; then
|
|
unset words[$i]
|
|
fi
|
|
|
|
# Format timestamps with tabs
|
|
if [[ ${words[$i]} == \[ && ${words[$i+1]} == *\] ]]; then
|
|
unset words[$i]
|
|
words[$i+1]=$(printf "[%13s\n" "${words[$i+1]}")
|
|
fi
|
|
done
|
|
|
|
if [[ ${words[$last]} =~ \[([^]]+)\] ]]; then
|
|
module=${words[$last]}
|
|
module=${module#\[}
|
|
module=${module%\]}
|
|
symbol=${words[$last-1]}
|
|
unset words[$last-1]
|
|
else
|
|
# The symbol is the last element, process it
|
|
symbol=${words[$last]}
|
|
module=
|
|
fi
|
|
|
|
unset words[$last]
|
|
parse_symbol # modifies $symbol
|
|
|
|
# Add up the line number to the symbol
|
|
echo "${words[@]}" "$symbol $module"
|
|
}
|
|
|
|
while read line; do
|
|
# Let's see if we have an address in the line
|
|
if [[ $line =~ \[\<([^]]+)\>\] ]] ||
|
|
[[ $line =~ [^+\ ]+\+0x[0-9a-f]+/0x[0-9a-f]+ ]]; then
|
|
# Translate address to line numbers
|
|
handle_line "$line"
|
|
# Is it a code line?
|
|
elif [[ $line == *Code:* ]]; then
|
|
decode_code "$line"
|
|
else
|
|
# Nothing special in this line, show it as is
|
|
echo "$line"
|
|
fi
|
|
done
|