x86: kprobes: add kprobes smoke tests that run on boot

[linux-2.6.git] / include / linux / kprobes.h

diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h
index 10005bc92a316000321e89ea87a76d3e7599b1ea..6168c0a441724f198f1999e0f35ce88012750d59 100644 (file)
--- a/include/linux/kprobes.h
+++ b/include/linux/kprobes.h
@@ -29,13 +29,13 @@
  *             <jkenisto@us.ibm.com>  and Prasanna S Panchamukhi
  *             <prasanna@in.ibm.com> added function-return probes.
  */
-#include <linux/config.h>
 #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 <linux/mutex.h>
 
 #ifdef CONFIG_KPROBES
 #include <asm/kprobes.h>
@@ -68,12 +68,21 @@ struct kprobe {
        /* list of kprobes for multi-handler support */
        struct list_head list;
 
+       /* Indicates that the corresponding module has been ref counted */
+       unsigned int mod_refcounted;
+
        /*count the number of times this probe was temporarily disarmed */
        unsigned long nmissed;
 
        /* location of the probe point */
        kprobe_opcode_t *addr;
 
+       /* Allow user to indicate symbol name of the probe point */
+       const char *symbol_name;
+
+       /* Offset into the symbol */
+       unsigned int offset;
+
        /* Called before addr is executed. */
        kprobe_pre_handler_t pre_handler;
 
@@ -107,19 +116,28 @@ struct kprobe {
  */
 struct jprobe {
        struct kprobe kp;
-       kprobe_opcode_t *entry; /* probe handling code to jump to */
+       void *entry;    /* probe handling code to jump to */
 };
 
+/* For backward compatibility with old code using JPROBE_ENTRY() */
+#define JPROBE_ENTRY(handler)  (handler)
+
 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);
+extern void arch_prepare_kretprobe(struct kretprobe_instance *ri,
+                                  struct pt_regs *regs);
+extern int arch_trampoline_kprobe(struct kprobe *p);
 #else /* ARCH_SUPPORTS_KRETPROBES */
 static inline void arch_prepare_kretprobe(struct kretprobe *rp,
                                        struct pt_regs *regs)
 {
 }
+static inline int arch_trampoline_kprobe(struct kprobe *p)
+{
+       return 0;
+}
 #endif /* ARCH_SUPPORTS_KRETPROBES */
 /*
  * Function-return probe -
@@ -148,15 +166,40 @@ struct kretprobe_instance {
        struct task_struct *task;
 };
 
+struct kretprobe_blackpoint {
+       const char *name;
+       void *addr;
+};
+extern struct kretprobe_blackpoint kretprobe_blacklist[];
+
+static inline void kretprobe_assert(struct kretprobe_instance *ri,
+       unsigned long orig_ret_address, unsigned long trampoline_address)
+{
+       if (!orig_ret_address || (orig_ret_address == trampoline_address)) {
+               printk("kretprobe BUG!: Processing kretprobe %p @ %p\n",
+                               ri->rp, ri->rp->kp.addr);
+               BUG();
+       }
+}
+
+#ifdef CONFIG_KPROBES_SANITY_TEST
+extern int init_test_probes(void);
+#else
+static inline int init_test_probes(void)
+{
+       return 0;
+}
+#endif /* CONFIG_KPROBES_SANITY_TEST */
+
 extern spinlock_t kretprobe_lock;
-extern struct semaphore kprobe_mutex;
+extern struct mutex kprobe_mutex;
 extern int arch_prepare_kprobe(struct kprobe *p);
 extern void arch_arm_kprobe(struct kprobe *p);
 extern void arch_disarm_kprobe(struct kprobe *p);
 extern int arch_init_kprobes(void);
 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);
+extern void free_insn_slot(kprobe_opcode_t *slot, int dirty);
 extern void kprobes_inc_nmissed_count(struct kprobe *p);
 
 /* Get the kprobe at this addr (if any) - called with preemption disabled */
@@ -186,14 +229,14 @@ int longjmp_break_handler(struct kprobe *, struct pt_regs *);
 int register_jprobe(struct jprobe *p);
 void unregister_jprobe(struct jprobe *p);
 void jprobe_return(void);
+unsigned long arch_deref_entry_point(void *);
 
 int register_kretprobe(struct kretprobe *rp);
 void unregister_kretprobe(struct kretprobe *rp);
 
-struct kretprobe_instance *get_free_rp_inst(struct kretprobe *rp);
-void add_rp_inst(struct kretprobe_instance *ri);
 void kprobe_flush_task(struct task_struct *tk);
-void recycle_rp_inst(struct kretprobe_instance *ri);
+void recycle_rp_inst(struct kretprobe_instance *ri, struct hlist_head *head);
+
 #else /* CONFIG_KPROBES */
 
 #define __kprobes      /**/