---

yaml --- r: 24109 b: refs/heads/master c: 2326c77 h: refs/heads/master i: 24107: 4a1db83 v: v3
git-mirror · Mar 26, 2006 · 47f51e0 · 47f51e0
1 parent e64cbf2
commit 47f51e0
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Showing 6 changed files with 19 additions and 14 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c6fd91f0bdcd294a0ae0ba2b2a7f7456ef4b7144
+refs/heads/master: 2326c77017c79fd6d55c69d8a49a57a252921bcd
diff --git a/trunk/arch/i386/kernel/kprobes.c b/trunk/arch/i386/kernel/kprobes.c
@@ -203,31 +203,21 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
 {
 	struct kprobe *p;
 	int ret = 0;
-	kprobe_opcode_t *addr = NULL;
-	unsigned long *lp;
+	kprobe_opcode_t *addr;
 	struct kprobe_ctlblk *kcb;
 #ifdef CONFIG_PREEMPT
 	unsigned pre_preempt_count = preempt_count();
 #endif /* CONFIG_PREEMPT */
 
+	addr = (kprobe_opcode_t *)(regs->eip - sizeof(kprobe_opcode_t));
+
 	/*
 	 * We don't want to be preempted for the entire
 	 * duration of kprobe processing
 	 */
 	preempt_disable();
 	kcb = get_kprobe_ctlblk();
 
-	/* Check if the application is using LDT entry for its code segment and
-	 * calculate the address by reading the base address from the LDT entry.
-	 */
-	if ((regs->xcs & 4) && (current->mm)) {
-		lp = (unsigned long *) ((unsigned long)((regs->xcs >> 3) * 8)
-					+ (char *) current->mm->context.ldt);
-		addr = (kprobe_opcode_t *) (get_desc_base(lp) + regs->eip -
-						sizeof(kprobe_opcode_t));
-	} else {
-		addr = (kprobe_opcode_t *)(regs->eip - sizeof(kprobe_opcode_t));
-	}
 	/* Check we're not actually recursing */
 	if (kprobe_running()) {
 		p = get_kprobe(addr);
@@ -579,6 +569,9 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
 	struct die_args *args = (struct die_args *)data;
 	int ret = NOTIFY_DONE;
 
+	if (args->regs && user_mode(args->regs))
+		return ret;
+
 	switch (val) {
 	case DIE_INT3:
 		if (kprobe_handler(args->regs))

diff --git a/trunk/arch/ia64/kernel/kprobes.c b/trunk/arch/ia64/kernel/kprobes.c
@@ -740,6 +740,9 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
 	struct die_args *args = (struct die_args *)data;
 	int ret = NOTIFY_DONE;
 
+	if (args->regs && user_mode(args->regs))
+		return ret;
+
 	switch(val) {
 	case DIE_BREAK:
 		/* err is break number from ia64_bad_break() */

diff --git a/trunk/arch/powerpc/kernel/kprobes.c b/trunk/arch/powerpc/kernel/kprobes.c
@@ -396,6 +396,9 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
 	struct die_args *args = (struct die_args *)data;
 	int ret = NOTIFY_DONE;
 
+	if (args->regs && user_mode(args->regs))
+		return ret;
+
 	switch (val) {
 	case DIE_BPT:
 		if (kprobe_handler(args->regs))

diff --git a/trunk/arch/sparc64/kernel/kprobes.c b/trunk/arch/sparc64/kernel/kprobes.c
@@ -324,6 +324,9 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
 	struct die_args *args = (struct die_args *)data;
 	int ret = NOTIFY_DONE;
 
+	if (args->regs && user_mode(args->regs))
+		return ret;
+
 	switch (val) {
 	case DIE_DEBUG:
 		if (kprobe_handler(args->regs))

diff --git a/trunk/arch/x86_64/kernel/kprobes.c b/trunk/arch/x86_64/kernel/kprobes.c
@@ -601,6 +601,9 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
 	struct die_args *args = (struct die_args *)data;
 	int ret = NOTIFY_DONE;
 
+	if (args->regs && user_mode(args->regs))
+		return ret;
+
 	switch (val) {
 	case DIE_INT3:
 		if (kprobe_handler(args->regs))