From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/scripts/decode_stacktrace.sh | 91 ++++++++++++++++++++++++++++++++++++++++-----
1 files changed, 81 insertions(+), 10 deletions(-)
diff --git a/kernel/scripts/decode_stacktrace.sh b/kernel/scripts/decode_stacktrace.sh
index 946735b..9039834 100755
--- a/kernel/scripts/decode_stacktrace.sh
+++ b/kernel/scripts/decode_stacktrace.sh
@@ -3,17 +3,67 @@
# (c) 2014, Sasha Levin <sasha.levin@oracle.com>
#set -x
-if [[ $# < 2 ]]; then
+if [[ $# < 1 ]]; then
echo "Usage:"
- echo " $0 [vmlinux] [base path] [modules path]"
+ echo " $0 -r <release> | <vmlinux> [base path] [modules path]"
exit 1
fi
-vmlinux=$1
-basepath=$2
-modpath=$3
+if [[ $1 == "-r" ]] ; then
+ vmlinux=""
+ basepath="auto"
+ modpath=""
+ release=$2
+
+ for fn in {,/usr/lib/debug}/boot/vmlinux-$release{,.debug} /lib/modules/$release{,/build}/vmlinux ; do
+ if [ -e "$fn" ] ; then
+ vmlinux=$fn
+ break
+ fi
+ done
+
+ if [[ $vmlinux == "" ]] ; then
+ echo "ERROR! vmlinux image for release $release is not found" >&2
+ exit 2
+ fi
+else
+ vmlinux=$1
+ basepath=${2-auto}
+ modpath=$3
+ release=""
+fi
+
declare -A cache
declare -A modcache
+
+find_module() {
+ if [[ "$modpath" != "" ]] ; then
+ for fn in $(find "$modpath" -name "${module//_/[-_]}.ko*") ; do
+ if readelf -WS "$fn" | grep -qwF .debug_line ; then
+ echo $fn
+ return
+ fi
+ done
+ return 1
+ fi
+
+ modpath=$(dirname "$vmlinux")
+ find_module && return
+
+ if [[ $release == "" ]] ; then
+ release=$(gdb -ex 'print init_uts_ns.name.release' -ex 'quit' -quiet -batch "$vmlinux" | sed -n 's/\$1 = "\(.*\)".*/\1/p')
+ fi
+
+ for dn in {/usr/lib/debug,}/lib/modules/$release ; do
+ if [ -e "$dn" ] ; then
+ modpath="$dn"
+ find_module && return
+ fi
+ done
+
+ modpath=""
+ return 1
+}
parse_symbol() {
# The structure of symbol at this point is:
@@ -27,15 +77,24 @@
elif [[ "${modcache[$module]+isset}" == "isset" ]]; then
local objfile=${modcache[$module]}
else
- [[ $modpath == "" ]] && return
- local objfile=$(find "$modpath" -name $module.ko -print -quit)
- [[ $objfile == "" ]] && return
+ local objfile=$(find_module)
+ if [[ $objfile == "" ]] ; then
+ echo "WARNING! Modules path isn't set, but is needed to parse this symbol" >&2
+ return
+ fi
modcache[$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%+*}
@@ -46,7 +105,11 @@
if [[ "${cache[$module,$name]+isset}" == "isset" ]]; then
local base_addr=${cache[$module,$name]}
else
- local base_addr=$(nm "$objfile" | grep -i ' t ' | awk "/ $name\$/ {print \$1}" | head -n1)
+ local base_addr=$(nm "$objfile" | awk '$3 == "'$name'" && ($2 == "t" || $2 == "T") {print $1; exit}')
+ if [[ $base_addr == "" ]] ; then
+ # address not found
+ return
+ fi
cache[$module,$name]="$base_addr"
fi
# Let's start doing the math to get the exact address into the
@@ -84,7 +147,7 @@
code=${code//$'\n'/' '}
# Replace old address with pretty line numbers
- symbol="$name ($code)"
+ symbol="$segment$name ($code)"
}
decode_code() {
@@ -138,6 +201,14 @@
echo "${words[@]}" "$symbol $module"
}
+if [[ $basepath == "auto" ]] ; then
+ module=""
+ symbol="kernel_init+0x0/0x0"
+ parse_symbol
+ basepath=${symbol#kernel_init (}
+ basepath=${basepath%/init/main.c:*)}
+fi
+
while read line; do
# Let's see if we have an address in the line
if [[ $line =~ \[\<([^]]+)\>\] ]] ||
--
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