Lines Matching refs:p
326 struct kprobe *p; in get_kprobe() local
329 hlist_for_each_entry_rcu(p, head, hlist) { in get_kprobe()
330 if (p->addr == addr) in get_kprobe()
331 return p; in get_kprobe()
338 static int aggr_pre_handler(struct kprobe *p, struct pt_regs *regs);
341 static inline int kprobe_aggrprobe(struct kprobe *p) in kprobe_aggrprobe() argument
343 return p->pre_handler == aggr_pre_handler; in kprobe_aggrprobe()
347 static inline int kprobe_unused(struct kprobe *p) in kprobe_unused() argument
349 return kprobe_aggrprobe(p) && kprobe_disabled(p) && in kprobe_unused()
350 list_empty(&p->list); in kprobe_unused()
356 static inline void copy_kprobe(struct kprobe *ap, struct kprobe *p) in copy_kprobe() argument
358 memcpy(&p->opcode, &ap->opcode, sizeof(kprobe_opcode_t)); in copy_kprobe()
359 memcpy(&p->ainsn, &ap->ainsn, sizeof(struct arch_specific_insn)); in copy_kprobe()
370 void opt_pre_handler(struct kprobe *p, struct pt_regs *regs) in opt_pre_handler() argument
374 list_for_each_entry_rcu(kp, &p->list, list) { in opt_pre_handler()
385 static void free_aggr_kprobe(struct kprobe *p) in free_aggr_kprobe() argument
389 op = container_of(p, struct optimized_kprobe, kp); in free_aggr_kprobe()
391 arch_remove_kprobe(p); in free_aggr_kprobe()
396 static inline int kprobe_optready(struct kprobe *p) in kprobe_optready() argument
400 if (kprobe_aggrprobe(p)) { in kprobe_optready()
401 op = container_of(p, struct optimized_kprobe, kp); in kprobe_optready()
409 static inline int kprobe_disarmed(struct kprobe *p) in kprobe_disarmed() argument
414 if (!kprobe_aggrprobe(p)) in kprobe_disarmed()
415 return kprobe_disabled(p); in kprobe_disarmed()
417 op = container_of(p, struct optimized_kprobe, kp); in kprobe_disarmed()
419 return kprobe_disabled(p) && list_empty(&op->list); in kprobe_disarmed()
423 static int kprobe_queued(struct kprobe *p) in kprobe_queued() argument
427 if (kprobe_aggrprobe(p)) { in kprobe_queued()
428 op = container_of(p, struct optimized_kprobe, kp); in kprobe_queued()
442 struct kprobe *p = NULL; in get_optimized_kprobe() local
446 for (i = 1; !p && i < MAX_OPTIMIZED_LENGTH; i++) in get_optimized_kprobe()
447 p = get_kprobe((void *)(addr - i)); in get_optimized_kprobe()
449 if (p && kprobe_optready(p)) { in get_optimized_kprobe()
450 op = container_of(p, struct optimized_kprobe, kp); in get_optimized_kprobe()
452 return p; in get_optimized_kprobe()
614 static void optimize_kprobe(struct kprobe *p) in optimize_kprobe() argument
619 if (!kprobe_optready(p) || !kprobes_allow_optimization || in optimize_kprobe()
620 (kprobe_disabled(p) || kprobes_all_disarmed)) in optimize_kprobe()
624 if (p->post_handler) in optimize_kprobe()
627 op = container_of(p, struct optimized_kprobe, kp); in optimize_kprobe()
657 static void unoptimize_kprobe(struct kprobe *p, bool force) in unoptimize_kprobe() argument
661 if (!kprobe_aggrprobe(p) || kprobe_disarmed(p)) in unoptimize_kprobe()
664 op = container_of(p, struct optimized_kprobe, kp); in unoptimize_kprobe()
665 if (!kprobe_optimized(p)) { in unoptimize_kprobe()
717 static void kill_optimized_kprobe(struct kprobe *p) in kill_optimized_kprobe() argument
721 op = container_of(p, struct optimized_kprobe, kp); in kill_optimized_kprobe()
727 if (kprobe_unused(p)) { in kill_optimized_kprobe()
743 void __prepare_optimized_kprobe(struct optimized_kprobe *op, struct kprobe *p) in __prepare_optimized_kprobe() argument
745 if (!kprobe_ftrace(p)) in __prepare_optimized_kprobe()
746 arch_prepare_optimized_kprobe(op, p); in __prepare_optimized_kprobe()
750 static void prepare_optimized_kprobe(struct kprobe *p) in prepare_optimized_kprobe() argument
754 op = container_of(p, struct optimized_kprobe, kp); in prepare_optimized_kprobe()
755 __prepare_optimized_kprobe(op, p); in prepare_optimized_kprobe()
759 static struct kprobe *alloc_aggr_kprobe(struct kprobe *p) in alloc_aggr_kprobe() argument
768 op->kp.addr = p->addr; in alloc_aggr_kprobe()
769 __prepare_optimized_kprobe(op, p); in alloc_aggr_kprobe()
774 static void init_aggr_kprobe(struct kprobe *ap, struct kprobe *p);
780 static void try_to_optimize_kprobe(struct kprobe *p) in try_to_optimize_kprobe() argument
786 if (kprobe_ftrace(p)) in try_to_optimize_kprobe()
794 ap = alloc_aggr_kprobe(p); in try_to_optimize_kprobe()
806 init_aggr_kprobe(ap, p); in try_to_optimize_kprobe()
819 struct kprobe *p; in optimize_all_kprobes() local
831 hlist_for_each_entry_rcu(p, head, hlist) in optimize_all_kprobes()
832 if (!kprobe_disabled(p)) in optimize_all_kprobes()
833 optimize_kprobe(p); in optimize_all_kprobes()
844 struct kprobe *p; in unoptimize_all_kprobes() local
858 hlist_for_each_entry_rcu(p, head, hlist) { in unoptimize_all_kprobes()
859 if (!kprobe_disabled(p)) in unoptimize_all_kprobes()
860 unoptimize_kprobe(p, false); in unoptimize_all_kprobes()
894 static void __arm_kprobe(struct kprobe *p) in __arm_kprobe() argument
899 _p = get_optimized_kprobe((unsigned long)p->addr); in __arm_kprobe()
904 arch_arm_kprobe(p); in __arm_kprobe()
905 optimize_kprobe(p); /* Try to optimize (add kprobe to a list) */ in __arm_kprobe()
909 static void __disarm_kprobe(struct kprobe *p, bool reopt) in __disarm_kprobe() argument
914 unoptimize_kprobe(p, kprobes_all_disarmed); in __disarm_kprobe()
916 if (!kprobe_queued(p)) { in __disarm_kprobe()
917 arch_disarm_kprobe(p); in __disarm_kprobe()
919 _p = get_optimized_kprobe((unsigned long)p->addr); in __disarm_kprobe()
928 #define optimize_kprobe(p) do {} while (0) argument
929 #define unoptimize_kprobe(p, f) do {} while (0) argument
930 #define kill_optimized_kprobe(p) do {} while (0) argument
931 #define prepare_optimized_kprobe(p) do {} while (0) argument
932 #define try_to_optimize_kprobe(p) do {} while (0) argument
933 #define __arm_kprobe(p) arch_arm_kprobe(p) argument
934 #define __disarm_kprobe(p, o) arch_disarm_kprobe(p) argument
935 #define kprobe_disarmed(p) kprobe_disabled(p) argument
950 static void free_aggr_kprobe(struct kprobe *p) in free_aggr_kprobe() argument
952 arch_remove_kprobe(p); in free_aggr_kprobe()
953 kfree(p); in free_aggr_kprobe()
956 static struct kprobe *alloc_aggr_kprobe(struct kprobe *p) in alloc_aggr_kprobe() argument
977 static int prepare_kprobe(struct kprobe *p) in prepare_kprobe() argument
979 if (!kprobe_ftrace(p)) in prepare_kprobe()
980 return arch_prepare_kprobe(p); in prepare_kprobe()
982 return arch_prepare_kprobe_ftrace(p); in prepare_kprobe()
986 static int __arm_kprobe_ftrace(struct kprobe *p, struct ftrace_ops *ops, in __arm_kprobe_ftrace() argument
991 ret = ftrace_set_filter_ip(ops, (unsigned long)p->addr, 0, 0); in __arm_kprobe_ftrace()
994 p->addr, ret); in __arm_kprobe_ftrace()
1014 ftrace_set_filter_ip(ops, (unsigned long)p->addr, 1, 0); in __arm_kprobe_ftrace()
1018 static int arm_kprobe_ftrace(struct kprobe *p) in arm_kprobe_ftrace() argument
1020 bool ipmodify = (p->post_handler != NULL); in arm_kprobe_ftrace()
1022 return __arm_kprobe_ftrace(p, in arm_kprobe_ftrace()
1028 static int __disarm_kprobe_ftrace(struct kprobe *p, struct ftrace_ops *ops, in __disarm_kprobe_ftrace() argument
1041 ret = ftrace_set_filter_ip(ops, (unsigned long)p->addr, 1, 0); in __disarm_kprobe_ftrace()
1043 p->addr, ret); in __disarm_kprobe_ftrace()
1047 static int disarm_kprobe_ftrace(struct kprobe *p) in disarm_kprobe_ftrace() argument
1049 bool ipmodify = (p->post_handler != NULL); in disarm_kprobe_ftrace()
1051 return __disarm_kprobe_ftrace(p, in disarm_kprobe_ftrace()
1056 #define prepare_kprobe(p) arch_prepare_kprobe(p) argument
1057 #define arm_kprobe_ftrace(p) (-ENODEV) argument
1058 #define disarm_kprobe_ftrace(p) (-ENODEV) argument
1095 static int aggr_pre_handler(struct kprobe *p, struct pt_regs *regs) in aggr_pre_handler() argument
1099 list_for_each_entry_rcu(kp, &p->list, list) { in aggr_pre_handler()
1111 static void aggr_post_handler(struct kprobe *p, struct pt_regs *regs, in aggr_post_handler() argument
1116 list_for_each_entry_rcu(kp, &p->list, list) { in aggr_post_handler()
1126 static int aggr_fault_handler(struct kprobe *p, struct pt_regs *regs, in aggr_fault_handler() argument
1144 void kprobes_inc_nmissed_count(struct kprobe *p) in kprobes_inc_nmissed_count() argument
1147 if (!kprobe_aggrprobe(p)) { in kprobes_inc_nmissed_count()
1148 p->nmissed++; in kprobes_inc_nmissed_count()
1150 list_for_each_entry_rcu(kp, &p->list, list) in kprobes_inc_nmissed_count()
1284 static int add_new_kprobe(struct kprobe *ap, struct kprobe *p) in add_new_kprobe() argument
1286 if (p->post_handler) in add_new_kprobe()
1289 list_add_rcu(&p->list, &ap->list); in add_new_kprobe()
1290 if (p->post_handler && !ap->post_handler) in add_new_kprobe()
1300 static void init_aggr_kprobe(struct kprobe *ap, struct kprobe *p) in init_aggr_kprobe() argument
1303 copy_kprobe(p, ap); in init_aggr_kprobe()
1305 ap->addr = p->addr; in init_aggr_kprobe()
1306 ap->flags = p->flags & ~KPROBE_FLAG_OPTIMIZED; in init_aggr_kprobe()
1310 if (p->post_handler && !kprobe_gone(p)) in init_aggr_kprobe()
1316 list_add_rcu(&p->list, &ap->list); in init_aggr_kprobe()
1317 hlist_replace_rcu(&p->hlist, &ap->hlist); in init_aggr_kprobe()
1324 static int register_aggr_kprobe(struct kprobe *orig_p, struct kprobe *p) in register_aggr_kprobe() argument
1378 copy_kprobe(ap, p); in register_aggr_kprobe()
1379 ret = add_new_kprobe(ap, p); in register_aggr_kprobe()
1386 if (ret == 0 && kprobe_disabled(ap) && !kprobe_disabled(p)) { in register_aggr_kprobe()
1393 list_del_rcu(&p->list); in register_aggr_kprobe()
1427 char symname[KSYM_NAME_LEN], *p; in within_kprobe_blacklist() local
1434 p = strchr(symname, '.'); in within_kprobe_blacklist()
1435 if (!p) in within_kprobe_blacklist()
1437 *p = '\0'; in within_kprobe_blacklist()
1471 static kprobe_opcode_t *kprobe_addr(struct kprobe *p) in kprobe_addr() argument
1473 return _kprobe_addr(p->addr, p->symbol_name, p->offset); in kprobe_addr()
1477 static struct kprobe *__get_valid_kprobe(struct kprobe *p) in __get_valid_kprobe() argument
1481 ap = get_kprobe(p->addr); in __get_valid_kprobe()
1485 if (p != ap) { in __get_valid_kprobe()
1487 if (list_p == p) in __get_valid_kprobe()
1497 static inline int check_kprobe_rereg(struct kprobe *p) in check_kprobe_rereg() argument
1502 if (__get_valid_kprobe(p)) in check_kprobe_rereg()
1509 int __weak arch_check_ftrace_location(struct kprobe *p) in arch_check_ftrace_location() argument
1513 ftrace_addr = ftrace_location((unsigned long)p->addr); in arch_check_ftrace_location()
1517 if ((unsigned long)p->addr != ftrace_addr) in arch_check_ftrace_location()
1519 p->flags |= KPROBE_FLAG_FTRACE; in arch_check_ftrace_location()
1527 static int check_kprobe_address_safe(struct kprobe *p, in check_kprobe_address_safe() argument
1532 ret = arch_check_ftrace_location(p); in check_kprobe_address_safe()
1539 if (!kernel_text_address((unsigned long) p->addr) || in check_kprobe_address_safe()
1540 within_kprobe_blacklist((unsigned long) p->addr) || in check_kprobe_address_safe()
1541 jump_label_text_reserved(p->addr, p->addr) || in check_kprobe_address_safe()
1542 find_bug((unsigned long)p->addr)) { in check_kprobe_address_safe()
1548 *probed_mod = __module_text_address((unsigned long) p->addr); in check_kprobe_address_safe()
1563 if (within_module_init((unsigned long)p->addr, *probed_mod) && in check_kprobe_address_safe()
1577 int register_kprobe(struct kprobe *p) in register_kprobe() argument
1585 addr = kprobe_addr(p); in register_kprobe()
1588 p->addr = addr; in register_kprobe()
1590 ret = check_kprobe_rereg(p); in register_kprobe()
1595 p->flags &= KPROBE_FLAG_DISABLED; in register_kprobe()
1596 p->nmissed = 0; in register_kprobe()
1597 INIT_LIST_HEAD(&p->list); in register_kprobe()
1599 ret = check_kprobe_address_safe(p, &probed_mod); in register_kprobe()
1605 old_p = get_kprobe(p->addr); in register_kprobe()
1608 ret = register_aggr_kprobe(old_p, p); in register_kprobe()
1615 ret = prepare_kprobe(p); in register_kprobe()
1621 INIT_HLIST_NODE(&p->hlist); in register_kprobe()
1622 hlist_add_head_rcu(&p->hlist, in register_kprobe()
1623 &kprobe_table[hash_ptr(p->addr, KPROBE_HASH_BITS)]); in register_kprobe()
1625 if (!kprobes_all_disarmed && !kprobe_disabled(p)) { in register_kprobe()
1626 ret = arm_kprobe(p); in register_kprobe()
1628 hlist_del_rcu(&p->hlist); in register_kprobe()
1635 try_to_optimize_kprobe(p); in register_kprobe()
1663 static struct kprobe *__disable_kprobe(struct kprobe *p) in __disable_kprobe() argument
1669 orig_p = __get_valid_kprobe(p); in __disable_kprobe()
1673 if (!kprobe_disabled(p)) { in __disable_kprobe()
1675 if (p != orig_p) in __disable_kprobe()
1676 p->flags |= KPROBE_FLAG_DISABLED; in __disable_kprobe()
1679 if (p == orig_p || aggr_kprobe_disabled(orig_p)) { in __disable_kprobe()
1688 p->flags &= ~KPROBE_FLAG_DISABLED; in __disable_kprobe()
1702 static int __unregister_kprobe_top(struct kprobe *p) in __unregister_kprobe_top() argument
1707 ap = __disable_kprobe(p); in __unregister_kprobe_top()
1711 if (ap == p) in __unregister_kprobe_top()
1729 if (p->post_handler && !kprobe_gone(p)) { in __unregister_kprobe_top()
1731 if ((list_p != p) && (list_p->post_handler)) in __unregister_kprobe_top()
1741 list_del_rcu(&p->list); in __unregister_kprobe_top()
1756 static void __unregister_kprobe_bottom(struct kprobe *p) in __unregister_kprobe_bottom() argument
1760 if (list_empty(&p->list)) in __unregister_kprobe_bottom()
1762 arch_remove_kprobe(p); in __unregister_kprobe_bottom()
1763 else if (list_is_singular(&p->list)) { in __unregister_kprobe_bottom()
1765 ap = list_entry(p->list.next, struct kprobe, list); in __unregister_kprobe_bottom()
1766 list_del(&p->list); in __unregister_kprobe_bottom()
1790 void unregister_kprobe(struct kprobe *p) in unregister_kprobe() argument
1792 unregister_kprobes(&p, 1); in unregister_kprobe()
1837 static int pre_handler_kretprobe(struct kprobe *p, struct pt_regs *regs) in pre_handler_kretprobe() argument
1839 struct kretprobe *rp = container_of(p, struct kretprobe, kp); in pre_handler_kretprobe()
2031 static int pre_handler_kretprobe(struct kprobe *p, struct pt_regs *regs) in pre_handler_kretprobe() argument
2040 static void kill_kprobe(struct kprobe *p) in kill_kprobe() argument
2044 p->flags |= KPROBE_FLAG_GONE; in kill_kprobe()
2045 if (kprobe_aggrprobe(p)) { in kill_kprobe()
2050 list_for_each_entry_rcu(kp, &p->list, list) in kill_kprobe()
2052 p->post_handler = NULL; in kill_kprobe()
2053 kill_optimized_kprobe(p); in kill_kprobe()
2059 arch_remove_kprobe(p); in kill_kprobe()
2066 struct kprobe *p; in disable_kprobe() local
2071 p = __disable_kprobe(kp); in disable_kprobe()
2072 if (IS_ERR(p)) in disable_kprobe()
2073 ret = PTR_ERR(p); in disable_kprobe()
2084 struct kprobe *p; in enable_kprobe() local
2089 p = __get_valid_kprobe(kp); in enable_kprobe()
2090 if (unlikely(p == NULL)) { in enable_kprobe()
2101 if (p != kp) in enable_kprobe()
2104 if (!kprobes_all_disarmed && kprobe_disabled(p)) { in enable_kprobe()
2105 p->flags &= ~KPROBE_FLAG_DISABLED; in enable_kprobe()
2106 ret = arm_kprobe(p); in enable_kprobe()
2108 p->flags |= KPROBE_FLAG_DISABLED; in enable_kprobe()
2203 struct kprobe *p; in kprobes_module_callback() local
2219 hlist_for_each_entry_rcu(p, head, hlist) in kprobes_module_callback()
2220 if (within_module_init((unsigned long)p->addr, mod) || in kprobes_module_callback()
2222 within_module_core((unsigned long)p->addr, mod))) { in kprobes_module_callback()
2234 kill_kprobe(p); in kprobes_module_callback()
2307 static void report_probe(struct seq_file *pi, struct kprobe *p, in report_probe() argument
2311 void *addr = p->addr; in report_probe()
2313 if (p->pre_handler == pre_handler_kretprobe) in report_probe()
2327 addr, kprobe_type, p->addr); in report_probe()
2330 pp = p; in report_probe()
2332 (kprobe_gone(p) ? "[GONE]" : ""), in report_probe()
2333 ((kprobe_disabled(p) && !kprobe_gone(p)) ? "[DISABLED]" : ""), in report_probe()
2359 struct kprobe *p, *kp; in show_kprobe_addr() local
2367 hlist_for_each_entry_rcu(p, head, hlist) { in show_kprobe_addr()
2368 sym = kallsyms_lookup((unsigned long)p->addr, NULL, in show_kprobe_addr()
2370 if (kprobe_aggrprobe(p)) { in show_kprobe_addr()
2371 list_for_each_entry_rcu(kp, &p->list, list) in show_kprobe_addr()
2372 report_probe(pi, kp, sym, offset, modname, p); in show_kprobe_addr()
2374 report_probe(pi, p, sym, offset, modname, NULL); in show_kprobe_addr()
2450 struct kprobe *p; in arm_all_kprobes() local
2470 hlist_for_each_entry_rcu(p, head, hlist) { in arm_all_kprobes()
2471 if (!kprobe_disabled(p)) { in arm_all_kprobes()
2472 err = arm_kprobe(p); in arm_all_kprobes()
2496 struct kprobe *p; in disarm_all_kprobes() local
2513 hlist_for_each_entry_rcu(p, head, hlist) { in disarm_all_kprobes()
2514 if (!arch_trampoline_kprobe(p) && !kprobe_disabled(p)) { in disarm_all_kprobes()
2515 err = disarm_kprobe(p, false); in disarm_all_kprobes()