static u32 rand1, preh_val, posth_val, jph_val;
static int errors, handler_errors, num_tests;
+static u32 (*target)(u32 value);
+static u32 (*target2)(u32 value);
static noinline u32 kprobe_target(u32 value)
{
- /*
- * gcc ignores noinline on some architectures unless we stuff
- * sufficient lard into the function. The get_kprobe() here is
- * just for that.
- *
- * NOTE: We aren't concerned about the correctness of get_kprobe()
- * here; hence, this call is neither under !preempt nor with the
- * kprobe_mutex held. This is fine(tm)
- */
- if (get_kprobe((void *)0xdeadbeef))
- printk(KERN_INFO "Kprobe smoke test: probe on 0xdeadbeef!\n");
-
return (value / div_factor);
}
return ret;
}
- ret = kprobe_target(rand1);
+ ret = target(rand1);
unregister_kprobe(&kp);
if (preh_val == 0) {
return 0;
}
+static noinline u32 kprobe_target2(u32 value)
+{
+ return (value / div_factor) + 1;
+}
+
+static int kp_pre_handler2(struct kprobe *p, struct pt_regs *regs)
+{
+ preh_val = (rand1 / div_factor) + 1;
+ return 0;
+}
+
+static void kp_post_handler2(struct kprobe *p, struct pt_regs *regs,
+ unsigned long flags)
+{
+ if (preh_val != (rand1 / div_factor) + 1) {
+ handler_errors++;
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "incorrect value in post_handler2\n");
+ }
+ posth_val = preh_val + div_factor;
+}
+
+static struct kprobe kp2 = {
+ .symbol_name = "kprobe_target2",
+ .pre_handler = kp_pre_handler2,
+ .post_handler = kp_post_handler2
+};
+
+static int test_kprobes(void)
+{
+ int ret;
+ struct kprobe *kps[2] = {&kp, &kp2};
+
+ kp.addr = 0; /* addr should be cleard for reusing kprobe. */
+ ret = register_kprobes(kps, 2);
+ if (ret < 0) {
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "register_kprobes returned %d\n", ret);
+ return ret;
+ }
+
+ preh_val = 0;
+ posth_val = 0;
+ ret = target(rand1);
+
+ if (preh_val == 0) {
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "kprobe pre_handler not called\n");
+ handler_errors++;
+ }
+
+ if (posth_val == 0) {
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "kprobe post_handler not called\n");
+ handler_errors++;
+ }
+
+ preh_val = 0;
+ posth_val = 0;
+ ret = target2(rand1);
+
+ if (preh_val == 0) {
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "kprobe pre_handler2 not called\n");
+ handler_errors++;
+ }
+
+ if (posth_val == 0) {
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "kprobe post_handler2 not called\n");
+ handler_errors++;
+ }
+
+ unregister_kprobes(kps, 2);
+ return 0;
+
+}
+
static u32 j_kprobe_target(u32 value)
{
if (value != rand1) {
return ret;
}
- ret = kprobe_target(rand1);
+ ret = target(rand1);
unregister_jprobe(&jp);
if (jph_val == 0) {
printk(KERN_ERR "Kprobe smoke test failed: "
return 0;
}
+static struct jprobe jp2 = {
+ .entry = j_kprobe_target,
+ .kp.symbol_name = "kprobe_target2"
+};
+
+static int test_jprobes(void)
+{
+ int ret;
+ struct jprobe *jps[2] = {&jp, &jp2};
+
+ jp.kp.addr = 0; /* addr should be cleard for reusing kprobe. */
+ ret = register_jprobes(jps, 2);
+ if (ret < 0) {
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "register_jprobes returned %d\n", ret);
+ return ret;
+ }
+
+ jph_val = 0;
+ ret = target(rand1);
+ if (jph_val == 0) {
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "jprobe handler not called\n");
+ handler_errors++;
+ }
+
+ jph_val = 0;
+ ret = target2(rand1);
+ if (jph_val == 0) {
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "jprobe handler2 not called\n");
+ handler_errors++;
+ }
+ unregister_jprobes(jps, 2);
+
+ return 0;
+}
#ifdef CONFIG_KRETPROBES
static u32 krph_val;
return ret;
}
- ret = kprobe_target(rand1);
+ ret = target(rand1);
unregister_kretprobe(&rp);
if (krph_val != rand1) {
printk(KERN_ERR "Kprobe smoke test failed: "
return 0;
}
+
+static int return_handler2(struct kretprobe_instance *ri, struct pt_regs *regs)
+{
+ unsigned long ret = regs_return_value(regs);
+
+ if (ret != (rand1 / div_factor) + 1) {
+ handler_errors++;
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "incorrect value in kretprobe handler2\n");
+ }
+ if (krph_val == 0) {
+ handler_errors++;
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "call to kretprobe entry handler failed\n");
+ }
+
+ krph_val = rand1;
+ return 0;
+}
+
+static struct kretprobe rp2 = {
+ .handler = return_handler2,
+ .entry_handler = entry_handler,
+ .kp.symbol_name = "kprobe_target2"
+};
+
+static int test_kretprobes(void)
+{
+ int ret;
+ struct kretprobe *rps[2] = {&rp, &rp2};
+
+ rp.kp.addr = 0; /* addr should be cleard for reusing kprobe. */
+ ret = register_kretprobes(rps, 2);
+ if (ret < 0) {
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "register_kretprobe returned %d\n", ret);
+ return ret;
+ }
+
+ krph_val = 0;
+ ret = target(rand1);
+ if (krph_val != rand1) {
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "kretprobe handler not called\n");
+ handler_errors++;
+ }
+
+ krph_val = 0;
+ ret = target2(rand1);
+ if (krph_val != rand1) {
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "kretprobe handler2 not called\n");
+ handler_errors++;
+ }
+ unregister_kretprobes(rps, 2);
+ return 0;
+}
#endif /* CONFIG_KRETPROBES */
int init_test_probes(void)
{
int ret;
+ target = kprobe_target;
+ target2 = kprobe_target2;
+
do {
rand1 = random32();
} while (rand1 <= div_factor);
if (ret < 0)
errors++;
+ num_tests++;
+ ret = test_kprobes();
+ if (ret < 0)
+ errors++;
+
num_tests++;
ret = test_jprobe();
if (ret < 0)
errors++;
+ num_tests++;
+ ret = test_jprobes();
+ if (ret < 0)
+ errors++;
+
#ifdef CONFIG_KRETPROBES
num_tests++;
ret = test_kretprobe();
if (ret < 0)
errors++;
+
+ num_tests++;
+ ret = test_kretprobes();
+ if (ret < 0)
+ errors++;
#endif /* CONFIG_KRETPROBES */
if (errors)
git.openpandora.org / pandora-kernel.git / blobdiff