linux/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_symbol.tc

#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: Kprobe event symbol argument
# requires: kprobe_events

SYMBOL="linux_proc_banner"

if [ ! -f /proc/kallsyms ]; then
  echo "Can not check the target symbol - please enable CONFIG_KALLSYMS"
  exit_unresolved
elif ! grep "$SYMBOL\$" /proc/kallsyms; then
  echo "Linux banner is not exported - please enable CONFIG_KALLSYMS_ALL"
  exit_unresolved
fi

: "Test get basic types symbol argument"
echo "p:testprobe_u $FUNCTION_FORK arg1=@linux_proc_banner:u64 arg2=@linux_proc_banner:u32 arg3=@linux_proc_banner:u16 arg4=@linux_proc_banner:u8" > kprobe_events
echo "p:testprobe_s $FUNCTION_FORK arg1=@linux_proc_banner:s64 arg2=@linux_proc_banner:s32 arg3=@linux_proc_banner:s16 arg4=@linux_proc_banner:s8" >> kprobe_events
if grep -q "x8/16/32/64" README; then
  echo "p:testprobe_x $FUNCTION_FORK arg1=@linux_proc_banner:x64 arg2=@linux_proc_banner:x32 arg3=@linux_proc_banner:x16 arg4=@linux_proc_banner:x8" >> kprobe_events
fi
echo "p:testprobe_bf $FUNCTION_FORK arg1=@linux_proc_banner:b8@4/32" >> kprobe_events
echo 1 > events/kprobes/enable
(echo "forked")
echo 0 > events/kprobes/enable
grep "testprobe_[usx]:.* arg1=.* arg2=.* arg3=.* arg4=.*" trace
grep "testprobe_bf:.* arg1=.*" trace

: "Test get string symbol argument"
echo "p:testprobe_str $FUNCTION_FORK arg1=@linux_proc_banner:string" > kprobe_events
echo 1 > events/kprobes/enable
(echo "forked")
echo 0 > events/kprobes/enable
RESULT=`grep "testprobe_str" trace | sed -e 's/.* arg1=\(.*\)/\1/'`

RESULT=`echo $RESULT | sed -e 's/.* \((.*)\) \((.*)\) .*/\1 \2/'`
ORIG=`cat /proc/version | sed -e 's/.* \((.*)\) \((.*)\) .*/\1 \2/'`
test "$RESULT" = "$ORIG"