diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-10-20 00:10:27 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-10-20 00:10:27 -0300 |
commit | d0b2f91bede3bd5e3d24dd6803e56eee959c1797 (patch) | |
tree | 7fee4ab0509879c373c4f2cbd5b8a5be5b4041ee /samples/kprobes/kretprobe_example.c | |
parent | e914f8eb445e8f74b00303c19c2ffceaedd16a05 (diff) |
Linux-libre 4.8.2-gnupck-4.8.2-gnu
Diffstat (limited to 'samples/kprobes/kretprobe_example.c')
-rw-r--r-- | samples/kprobes/kretprobe_example.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/samples/kprobes/kretprobe_example.c b/samples/kprobes/kretprobe_example.c index ebb1d1aed..7f9060f43 100644 --- a/samples/kprobes/kretprobe_example.c +++ b/samples/kprobes/kretprobe_example.c @@ -55,14 +55,14 @@ static int entry_handler(struct kretprobe_instance *ri, struct pt_regs *regs) */ static int ret_handler(struct kretprobe_instance *ri, struct pt_regs *regs) { - int retval = regs_return_value(regs); + unsigned long retval = regs_return_value(regs); struct my_data *data = (struct my_data *)ri->data; s64 delta; ktime_t now; now = ktime_get(); delta = ktime_to_ns(ktime_sub(now, data->entry_stamp)); - printk(KERN_INFO "%s returned %d and took %lld ns to execute\n", + pr_info("%s returned %lu and took %lld ns to execute\n", func_name, retval, (long long)delta); return 0; } @@ -82,11 +82,10 @@ static int __init kretprobe_init(void) my_kretprobe.kp.symbol_name = func_name; ret = register_kretprobe(&my_kretprobe); if (ret < 0) { - printk(KERN_INFO "register_kretprobe failed, returned %d\n", - ret); + pr_err("register_kretprobe failed, returned %d\n", ret); return -1; } - printk(KERN_INFO "Planted return probe at %s: %p\n", + pr_info("Planted return probe at %s: %p\n", my_kretprobe.kp.symbol_name, my_kretprobe.kp.addr); return 0; } @@ -94,11 +93,10 @@ static int __init kretprobe_init(void) static void __exit kretprobe_exit(void) { unregister_kretprobe(&my_kretprobe); - printk(KERN_INFO "kretprobe at %p unregistered\n", - my_kretprobe.kp.addr); + pr_info("kretprobe at %p unregistered\n", my_kretprobe.kp.addr); /* nmissed > 0 suggests that maxactive was set too low. */ - printk(KERN_INFO "Missed probing %d instances of %s\n", + pr_info("Missed probing %d instances of %s\n", my_kretprobe.nmissed, my_kretprobe.kp.symbol_name); } |