2 # SPDX-License-Identifier: GPL-2.0
3 # description: Kprobe event argument syntax
5 [ -f kprobe_events ] || exit_unsupported # this is configurable
7 grep "x8/16/32/64" README > /dev/null || exit_unsupported # version issue
16 if ! grep -qw ${GOODSYM} /proc/kallsyms ; then
20 SYMADDR=0x`grep -w ${GOODSYM} /proc/kallsyms | cut -f 1 -d " "`
39 test_goodarg() # Good-args
42 echo "p ${PROBEFUNC} $1" > kprobe_events
47 test_badarg() # Bad-args
50 ! echo "p ${PROBEFUNC} $1" > kprobe_events
58 test_goodarg ${GOODREG}
62 test_goodarg "@${GOODSYM}" "@${SYMADDR}" "@${GOODSYM}+10" "@${GOODSYM}-10"
63 test_badarg "@" "@${BADSYM}" "@${GOODSYM}*10" "@${GOODSYM}/10" \
64 "@${GOODSYM}%10" "@${GOODSYM}&10" "@${GOODSYM}|10"
67 test_goodarg "\$stack" "\$stack0" "\$stack1"
68 test_badarg "\$stackp" "\$stack0+10" "\$stack1-10"
71 echo "r ${PROBEFUNC} \$retval" > kprobe_events
72 ! echo "p ${PROBEFUNC} \$retval" > kprobe_events
74 # $comm was introduced in 4.8, older kernels reject it.
75 if grep -A1 "fetcharg:" README | grep -q '\$comm' ; then
80 : "Indirect memory access"
81 test_goodarg "+0(${GOODREG})" "-0(${GOODREG})" "+10(\$stack)" \
82 "+0(\$stack1)" "+10(@${GOODSYM}-10)" "+0(+10(+20(\$stack)))"
83 test_badarg "+(${GOODREG})" "(${GOODREG}+10)" "-(${GOODREG})" "(${GOODREG})" \
84 "+10(\$comm)" "+0(${GOODREG})+10"
87 test_goodarg "varname=${GOODREG}"
88 test_badarg "varname=varname2=${GOODREG}"
91 test_goodarg "${GOODREG}:${GOODTYPE}"
92 test_badarg "${GOODREG}::${GOODTYPE}" "${GOODREG}:${BADTYPE}" \
93 "${GOODTYPE}:${GOODREG}"
97 test_goodarg "\$comm:string" "+0(\$stack):string"
98 test_badarg "\$comm:x64" "\$stack:string" "${GOODREG}:string"