1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0 3# description: Register/unregister many kprobe events 4# requires: kprobe_events 5 6# ftrace fentry skip size depends on the machine architecture. 7# Currently HAVE_KPROBES_ON_FTRACE defined on x86 and powerpc64le 8case `uname -m` in 9 x86_64|i[3456]86) OFFS=5;; 10 ppc64le) OFFS=8;; 11 *) OFFS=0;; 12esac 13 14N=0 15echo "Setup up kprobes on first available 256 text symbols" 16grep -i " t " /proc/kallsyms | cut -f3 -d" " | grep -v .*\\..* | \ 17while read i; do 18 echo p ${i}+${OFFS} >> kprobe_events && N=$((N+1)) ||: 19 test $N -eq 256 && break 20done 21 22L=`cat kprobe_events | wc -l` 23if [ $L -ne 256 ]; then 24 echo "The number of kprobes events ($L) is not 256" 25 exit_fail 26fi 27 28echo 1 > events/kprobes/enable 29echo 0 > events/kprobes/enable 30echo > kprobe_events 31echo "Waiting for unoptimizing & freeing" 32sleep 5 33echo "Done" 34