1#!/bin/sh
2# SPDX-License-Identifier: GPL-2.0
3# description: Register/unregister many kprobe events
4
5[ -f kprobe_events ] || exit_unsupported # this is configurable
6
7# ftrace fentry skip size depends on the machine architecture.
8# Currently HAVE_KPROBES_ON_FTRACE defined on x86 and powerpc64le
9case `uname -m` in
10  x86_64|i[3456]86) OFFS=5;;
11  ppc64le) OFFS=8;;
12  *) OFFS=0;;
13esac
14
15N=0
16echo "Setup up kprobes on first available 256 text symbols"
17grep -i " t " /proc/kallsyms | cut -f3 -d" " | grep -v .*\\..* | \
18while read i; do
19  echo p ${i}+${OFFS} >> kprobe_events && N=$((N+1)) ||:
20  test $N -eq 256 && break
21done
22
23L=`cat kprobe_events | wc -l`
24if [ $L -ne 256 ]; then
25  echo "The number of kprobes events ($L) is not 256"
26  exit_fail
27fi
28
29echo 1 > events/kprobes/enable
30echo 0 > events/kprobes/enable
31echo > kprobe_events
32echo "Waiting for unoptimizing & freeing"
33sleep 5
34echo "Done"
35