kprobes: Remove jprobe stub API

Remove jprobe stub APIs from linux/kprobes.h since
the jprobe implementation was completely gone.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-arch@vger.kernel.org
Link: https://lore.kernel.org/lkml/152942503572.15209.1652552217914694917.stgit@devbox
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h
index b520baa6568265d9b028d37e735eae572b0f49c8..e909413e4e38c6b95beed624581252de0be8ad18 100644 (file)
--- a/include/linux/kprobes.h
+++ b/include/linux/kprobes.h
@@ -63,7 +63,6 @@ struct pt_regs;
 struct kretprobe;
 struct kretprobe_instance;
 typedef int (*kprobe_pre_handler_t) (struct kprobe *, struct pt_regs *);
-typedef int (*kprobe_break_handler_t) (struct kprobe *, struct pt_regs *);
 typedef void (*kprobe_post_handler_t) (struct kprobe *, struct pt_regs *,
                                       unsigned long flags);
 typedef int (*kprobe_fault_handler_t) (struct kprobe *, struct pt_regs *,
@@ -101,12 +100,6 @@ struct kprobe {
         */
        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.
-        */
-       kprobe_break_handler_t break_handler;
-
        /* Saved opcode (which has been replaced with breakpoint) */
        kprobe_opcode_t opcode;
 
@@ -154,24 +147,6 @@ static inline int kprobe_ftrace(struct kprobe *p)
        return p->flags & KPROBE_FLAG_FTRACE;
 }
 
-/*
- * Special probe type that uses setjmp-longjmp type tricks to resume
- * execution at a specified entry with a matching prototype corresponding
- * to the probed function - a trick to enable arguments to become
- * accessible seamlessly by probe handling logic.
- * Note:
- * Because of the way compilers allocate stack space for local variables
- * etc upfront, regardless of sub-scopes within a function, this mirroring
- * principle currently works only for probes placed on function entry points.
- */
-struct jprobe {
-       struct kprobe kp;
-       void *entry;    /* probe handling code to jump to */
-};
-
-/* For backward compatibility with old code using JPROBE_ENTRY() */
-#define JPROBE_ENTRY(handler)  (handler)
-
 /*
  * Function-return probe -
  * Note:
@@ -436,9 +411,6 @@ static inline void unregister_kprobe(struct kprobe *p)
 static inline void unregister_kprobes(struct kprobe **kps, int num)
 {
 }
-static inline void jprobe_return(void)
-{
-}
 static inline int register_kretprobe(struct kretprobe *rp)
 {
        return -ENOSYS;
@@ -465,20 +437,6 @@ static inline int enable_kprobe(struct kprobe *kp)
        return -ENOSYS;
 }
 #endif /* CONFIG_KPROBES */
-static inline int register_jprobe(struct jprobe *p)
-{
-       return -ENOSYS;
-}
-static inline int register_jprobes(struct jprobe **jps, int num)
-{
-       return -ENOSYS;
-}
-static inline void unregister_jprobe(struct jprobe *p)
-{
-}
-static inline void unregister_jprobes(struct jprobe **jps, int num)
-{
-}
 static inline int disable_kretprobe(struct kretprobe *rp)
 {
        return disable_kprobe(&rp->kp);
@@ -487,14 +445,6 @@ static inline int enable_kretprobe(struct kretprobe *rp)
 {
        return enable_kprobe(&rp->kp);
 }
-static inline int disable_jprobe(struct jprobe *jp)
-{
-       return -ENOSYS;
-}
-static inline int enable_jprobe(struct jprobe *jp)
-{
-       return -ENOSYS;
-}
 
 #ifndef CONFIG_KPROBES
 static inline bool is_kprobe_insn_slot(unsigned long addr)