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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2020-03-26 23:50:11 +0900 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-05-12 17:15:33 +0200 |
| commit | d85eaa9411472a99de4b5732cb59c8bae629d5f1 (patch) | |
| tree | 4d35f76035c78c48da9b96cd298d462643342fdc /samples | |
| parent | 16db6264c93d2d7df9eb8be5d9eb717ab30105fe (diff) | |
| download | lwn-d85eaa9411472a99de4b5732cb59c8bae629d5f1.tar.gz lwn-d85eaa9411472a99de4b5732cb59c8bae629d5f1.zip | |
samples/kprobes: Add __kprobes and NOKPROBE_SYMBOL() for handlers.
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
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/kprobes/kprobe_example.c | 6 | ||||
| -rw-r--r-- | samples/kprobes/kretprobe_example.c | 2 |
2 files changed, 6 insertions, 2 deletions
diff --git a/samples/kprobes/kprobe_example.c b/samples/kprobes/kprobe_example.c index d693c23a85e8..501911d1b327 100644 --- a/samples/kprobes/kprobe_example.c +++ b/samples/kprobes/kprobe_example.c @@ -25,7 +25,7 @@ static struct kprobe kp = { }; /* kprobe pre_handler: called just before the probed instruction is executed */ -static int handler_pre(struct kprobe *p, struct pt_regs *regs) +static int __kprobes handler_pre(struct kprobe *p, struct pt_regs *regs) { #ifdef CONFIG_X86 pr_info("<%s> pre_handler: p->addr = 0x%p, ip = %lx, flags = 0x%lx\n", @@ -54,7 +54,7 @@ static int handler_pre(struct kprobe *p, struct pt_regs *regs) } /* kprobe post_handler: called after the probed instruction is executed */ -static void handler_post(struct kprobe *p, struct pt_regs *regs, +static void __kprobes handler_post(struct kprobe *p, struct pt_regs *regs, unsigned long flags) { #ifdef CONFIG_X86 @@ -90,6 +90,8 @@ static int handler_fault(struct kprobe *p, struct pt_regs *regs, int trapnr) /* Return 0 because we don't handle the fault. */ return 0; } +/* NOKPROBE_SYMBOL() is also available */ +NOKPROBE_SYMBOL(handler_fault); static int __init kprobe_init(void) { diff --git a/samples/kprobes/kretprobe_example.c b/samples/kprobes/kretprobe_example.c index 186315ca88b3..013e8e6ebae9 100644 --- a/samples/kprobes/kretprobe_example.c +++ b/samples/kprobes/kretprobe_example.c @@ -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, |