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-rw-r--r--include/linux/kprobes.h40
1 files changed, 26 insertions, 14 deletions
diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h
index e30afdca7917..e373c4a9de53 100644
--- a/include/linux/kprobes.h
+++ b/include/linux/kprobes.h
@@ -33,6 +33,9 @@
#include <linux/list.h>
#include <linux/notifier.h>
#include <linux/smp.h>
+#include <linux/percpu.h>
+#include <linux/spinlock.h>
+#include <linux/rcupdate.h>
#include <asm/kprobes.h>
@@ -106,6 +109,9 @@ struct jprobe {
kprobe_opcode_t *entry; /* probe handling code to jump to */
};
+DECLARE_PER_CPU(struct kprobe *, current_kprobe);
+DECLARE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
+
#ifdef ARCH_SUPPORTS_KRETPROBES
extern void arch_prepare_kretprobe(struct kretprobe *rp, struct pt_regs *regs);
#else /* ARCH_SUPPORTS_KRETPROBES */
@@ -142,17 +148,7 @@ struct kretprobe_instance {
};
#ifdef CONFIG_KPROBES
-/* Locks kprobe: irq must be disabled */
-void lock_kprobes(void);
-void unlock_kprobes(void);
-
-/* kprobe running now on this CPU? */
-static inline int kprobe_running(void)
-{
- extern unsigned int kprobe_cpu;
- return kprobe_cpu == smp_processor_id();
-}
-
+extern spinlock_t kretprobe_lock;
extern int arch_prepare_kprobe(struct kprobe *p);
extern void arch_copy_kprobe(struct kprobe *p);
extern void arch_arm_kprobe(struct kprobe *p);
@@ -163,10 +159,26 @@ extern void show_registers(struct pt_regs *regs);
extern kprobe_opcode_t *get_insn_slot(void);
extern void free_insn_slot(kprobe_opcode_t *slot);
-/* Get the kprobe at this addr (if any). Must have called lock_kprobes */
+/* Get the kprobe at this addr (if any) - called with preemption disabled */
struct kprobe *get_kprobe(void *addr);
struct hlist_head * kretprobe_inst_table_head(struct task_struct *tsk);
+/* kprobe_running() will just return the current_kprobe on this CPU */
+static inline struct kprobe *kprobe_running(void)
+{
+ return (__get_cpu_var(current_kprobe));
+}
+
+static inline void reset_current_kprobe(void)
+{
+ __get_cpu_var(current_kprobe) = NULL;
+}
+
+static inline struct kprobe_ctlblk *get_kprobe_ctlblk(void)
+{
+ return (&__get_cpu_var(kprobe_ctlblk));
+}
+
int register_kprobe(struct kprobe *p);
void unregister_kprobe(struct kprobe *p);
int setjmp_pre_handler(struct kprobe *, struct pt_regs *);
@@ -183,9 +195,9 @@ void add_rp_inst(struct kretprobe_instance *ri);
void kprobe_flush_task(struct task_struct *tk);
void recycle_rp_inst(struct kretprobe_instance *ri);
#else /* CONFIG_KPROBES */
-static inline int kprobe_running(void)
+static inline struct kprobe *kprobe_running(void)
{
- return 0;
+ return NULL;
}
static inline int register_kprobe(struct kprobe *p)
{
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