#define KPROBE_HIT_SSDONE 0x00000008
/* Attach to insert probes on any functions which should be ignored*/
-#define __kprobes __attribute__((__section__(".kprobes.text"))) notrace
+#define __kprobes __attribute__((__section__(".kprobes.text")))
#else /* CONFIG_KPROBES */
typedef int kprobe_opcode_t;
struct arch_specific_insn {
int dummy;
};
-#define __kprobes notrace
+#define __kprobes
#endif /* CONFIG_KPROBES */
struct kprobe;
/* Called after addr is executed, unless... */
kprobe_post_handler_t post_handler;
- /* ... called if executing addr causes a fault (eg. page fault).
- * Return 1 if it handled fault, otherwise kernel will see it. */
+ /*
+ * ... called if executing addr causes a fault (eg. page fault).
+ * Return 1 if it handled fault, otherwise kernel will see it.
+ */
kprobe_fault_handler_t fault_handler;
- /* ... called if breakpoint trap occurs in probe handler.
- * Return 1 if it handled break, otherwise kernel will see it. */
+ /*
+ * ... called if breakpoint trap occurs in probe handler.
+ * Return 1 if it handled break, otherwise kernel will see it.
+ */
kprobe_break_handler_t break_handler;
/* Saved opcode (which has been replaced with breakpoint) */
/* copy of the original instruction */
struct arch_specific_insn ainsn;
- /* Indicates various status flags. Protected by kprobe_mutex. */
+ /*
+ * Indicates various status flags.
+ * Protected by kprobe_mutex after this kprobe is registered.
+ */
u32 flags;
};
/* Kprobe status flags */
#define KPROBE_FLAG_GONE 1 /* breakpoint has already gone */
-
+#define KPROBE_FLAG_DISABLED 2 /* probe is temporarily disabled */
+#define KPROBE_FLAG_OPTIMIZED 4 /*
+ * probe is really optimized.
+ * NOTE:
+ * this flag is only for optimized_kprobe.
+ */
+
+/* Has this kprobe gone ? */
static inline int kprobe_gone(struct kprobe *p)
{
return p->flags & KPROBE_FLAG_GONE;
}
+/* Is this kprobe disabled ? */
+static inline int kprobe_disabled(struct kprobe *p)
+{
+ return p->flags & (KPROBE_FLAG_DISABLED | KPROBE_FLAG_GONE);
+}
+
+/* Is this kprobe really running optimized path ? */
+static inline int kprobe_optimized(struct kprobe *p)
+{
+ return p->flags & KPROBE_FLAG_OPTIMIZED;
+}
/*
* Special probe type that uses setjmp-longjmp type tricks to resume
* execution at a specified entry with a matching prototype corresponding
DECLARE_PER_CPU(struct kprobe *, current_kprobe);
DECLARE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
+/*
+ * For #ifdef avoidance:
+ */
+static inline int kprobes_built_in(void)
+{
+ return 1;
+}
+
#ifdef CONFIG_KRETPROBES
extern void arch_prepare_kretprobe(struct kretprobe_instance *ri,
struct pt_regs *regs);
extern void free_insn_slot(kprobe_opcode_t *slot, int dirty);
extern void kprobes_inc_nmissed_count(struct kprobe *p);
+#ifdef CONFIG_OPTPROBES
+/*
+ * Internal structure for direct jump optimized probe
+ */
+struct optimized_kprobe {
+ struct kprobe kp;
+ struct list_head list; /* list for optimizing queue */
+ struct arch_optimized_insn optinsn;
+};
+
+/* Architecture dependent functions for direct jump optimization */
+extern int arch_prepared_optinsn(struct arch_optimized_insn *optinsn);
+extern int arch_check_optimized_kprobe(struct optimized_kprobe *op);
+extern int arch_prepare_optimized_kprobe(struct optimized_kprobe *op);
+extern void arch_remove_optimized_kprobe(struct optimized_kprobe *op);
+extern int arch_optimize_kprobe(struct optimized_kprobe *op);
+extern void arch_unoptimize_kprobe(struct optimized_kprobe *op);
+extern kprobe_opcode_t *get_optinsn_slot(void);
+extern void free_optinsn_slot(kprobe_opcode_t *slot, int dirty);
+extern int arch_within_optimized_kprobe(struct optimized_kprobe *op,
+ unsigned long addr);
+
+extern void opt_pre_handler(struct kprobe *p, struct pt_regs *regs);
+
+#ifdef CONFIG_SYSCTL
+extern int sysctl_kprobes_optimization;
+extern int proc_kprobes_optimization_handler(struct ctl_table *table,
+ int write, void __user *buffer,
+ size_t *length, loff_t *ppos);
+#endif
+
+#endif /* CONFIG_OPTPROBES */
+
/* Get the kprobe at this addr (if any) - called with preemption disabled */
struct kprobe *get_kprobe(void *addr);
void kretprobe_hash_lock(struct task_struct *tsk,
void kprobe_flush_task(struct task_struct *tk);
void recycle_rp_inst(struct kretprobe_instance *ri, struct hlist_head *head);
-#else /* CONFIG_KPROBES */
+int disable_kprobe(struct kprobe *kp);
+int enable_kprobe(struct kprobe *kp);
+
+void dump_kprobe(struct kprobe *kp);
+#else /* !CONFIG_KPROBES: */
+
+static inline int kprobes_built_in(void)
+{
+ return 0;
+}
+static inline int kprobe_fault_handler(struct pt_regs *regs, int trapnr)
+{
+ return 0;
+}
static inline struct kprobe *get_kprobe(void *addr)
{
return NULL;
static inline void kprobe_flush_task(struct task_struct *tk)
{
}
-#endif /* CONFIG_KPROBES */
-#endif /* _LINUX_KPROBES_H */
+static inline int disable_kprobe(struct kprobe *kp)
+{
+ return -ENOSYS;
+}
+static inline int enable_kprobe(struct kprobe *kp)
+{
+ return -ENOSYS;
+}
+#endif /* CONFIG_KPROBES */
+static inline int disable_kretprobe(struct kretprobe *rp)
+{
+ return disable_kprobe(&rp->kp);
+}
+static inline int enable_kretprobe(struct kretprobe *rp)
+{
+ return enable_kprobe(&rp->kp);
+}
+static inline int disable_jprobe(struct jprobe *jp)
+{
+ return disable_kprobe(&jp->kp);
+}
+static inline int enable_jprobe(struct jprobe *jp)
+{
+ return enable_kprobe(&jp->kp);
+}
+
+#endif /* _LINUX_KPROBES_H */