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Diffstat (limited to 'kernel/test_kprobes.c')
-rw-r--r--kernel/test_kprobes.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/kernel/test_kprobes.c b/kernel/test_kprobes.c
index 88cdb109e13c..06b6395b45b2 100644
--- a/kernel/test_kprobes.c
+++ b/kernel/test_kprobes.c
@@ -135,6 +135,12 @@ static int test_jprobe(void)
#ifdef CONFIG_KRETPROBES
static u32 krph_val;
+static int entry_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
+{
+ krph_val = (rand1 / div_factor);
+ return 0;
+}
+
static int return_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
{
unsigned long ret = regs_return_value(regs);
@@ -144,13 +150,19 @@ static int return_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
printk(KERN_ERR "Kprobe smoke test failed: "
"incorrect value in kretprobe handler\n");
}
+ if (krph_val == 0) {
+ handler_errors++;
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "call to kretprobe entry handler failed\n");
+ }
- krph_val = (rand1 / div_factor);
+ krph_val = rand1;
return 0;
}
static struct kretprobe rp = {
.handler = return_handler,
+ .entry_handler = entry_handler,
.kp.symbol_name = "kprobe_target"
};
@@ -167,7 +179,7 @@ static int test_kretprobe(void)
ret = kprobe_target(rand1);
unregister_kretprobe(&rp);
- if (krph_val == 0) {
+ if (krph_val != rand1) {
printk(KERN_ERR "Kprobe smoke test failed: "
"kretprobe handler not called\n");
handler_errors++;