1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0 3# description: Kprobe event user-memory access 4# requires: kprobe_events '$arg<N>':README 5 6grep -A10 "fetcharg:" README | grep -q 'ustring' || exit_unsupported 7grep -A10 "fetcharg:" README | grep -q '\[u\]<offset>' || exit_unsupported 8 9:;: "user-memory access syntax and ustring working on user memory";: 10echo 'p:myevent do_sys_open path=+0($arg2):ustring path2=+u0($arg2):string' \ 11 > kprobe_events 12 13grep myevent kprobe_events | \ 14 grep -q 'path=+0($arg2):ustring path2=+u0($arg2):string' 15echo 1 > events/kprobes/myevent/enable 16echo > /dev/null 17echo 0 > events/kprobes/myevent/enable 18 19grep myevent trace | grep -q 'path="/dev/null" path2="/dev/null"' 20 21:;: "user-memory access syntax and ustring not working with kernel memory";: 22echo 'p:myevent vfs_symlink path=+0($arg3):ustring path2=+u0($arg3):string' \ 23 > kprobe_events 24echo 1 > events/kprobes/myevent/enable 25ln -s foo $TMPDIR/bar 26echo 0 > events/kprobes/myevent/enable 27 28grep myevent trace | grep -q 'path=(fault) path2=(fault)' 29 30exit 0 31