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samples/kprobes: Add __kprobes and NOKPROBE_SYMBOL() for handlers.

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Add __kprobes and NOKPROBE_SYMBOL() for sample kprobe handlers.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200505134059.878578033@linutronix.de
This commit is contained in:
Masami Hiramatsu
2020-03-26 23:50:11 +09:00
committed by Thomas Gleixner
parent 16db6264c9
commit d85eaa9411
2 changed files with 6 additions and 2 deletions
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2
samples/kprobes/kretprobe_example.c
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@@ -48,6 +48,7 @@ static int entry_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
data->entry_stamp = ktime_get();
return 0;
}
NOKPROBE_SYMBOL(entry_handler);
/*
* Return-probe handler: Log the return value and duration. Duration may turn
@@ -67,6 +68,7 @@ static int ret_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
func_name, retval, (long long)delta);
return 0;
}
NOKPROBE_SYMBOL(ret_handler);
static struct kretprobe my_kretprobe = {
.handler = ret_handler,