5 * Dynamic Binary Instrumentation Module based on KProbes
6 * modules/kprobe/dbi_uprobes.h
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 * Copyright (C) Samsung Electronics, 2006-2010
24 * 2008-2009 Alexey Gerenkov <a.gerenkov@samsung.com> User-Space
25 * Probes initial implementation; Support x86/ARM/MIPS for both user and kernel spaces.
26 * 2010 Ekaterina Gorelkina <e.gorelkina@samsung.com>: redesign module for separating core and arch parts
30 #include "dbi_kprobes.h"
34 struct task_struct *task;
37 typedef unsigned long (*uprobe_pre_entry_handler_t)(void *priv_arg, struct pt_regs * regs);
41 /* probe handling code to jump to */
43 // handler whichw willb bec called before 'entry'
44 uprobe_pre_entry_handler_t pre_entry;
48 struct uretprobe_instance;
50 typedef int (*uretprobe_handler_t)(struct uretprobe_instance *, struct pt_regs *, void *);
53 * Function-return probe -
55 * User needs to provide a handler function, and initialize maxactive.
56 * maxactive - The maximum number of instances of the probed function that
57 * can be active concurrently.
58 * nmissed - tracks the number of times the probed function's return was
59 * ignored, due to maxactive being too low.
64 uretprobe_handler_t handler;
68 struct hlist_head free_instances;
69 struct hlist_head used_instances;
72 struct uretprobe_instance {
73 /* either on free list or used list */
74 struct hlist_node uflist;
75 struct hlist_node hlist;
77 kprobe_opcode_t *ret_addr;
79 struct task_struct *task;
82 int dbi_register_uprobe(struct uprobe *p, int atomic);
83 void dbi_unregister_uprobe(struct uprobe *p, int atomic);
85 int dbi_register_ujprobe(struct ujprobe *jp, int atomic);
86 void dbi_unregister_ujprobe(struct ujprobe *jp, int atomic);
88 int dbi_register_uretprobe(struct uretprobe *rp, int atomic);
89 void dbi_unregister_uretprobe(struct uretprobe *rp, int atomic);
91 void dbi_unregister_all_uprobes(struct task_struct *task, int atomic);
93 void dbi_uprobe_return(void);
94 struct kprobe *get_ukprobe(void *addr, pid_t tgid);
95 struct kprobe *get_ukprobe_by_insn_slot(void *addr, pid_t tgid, struct pt_regs *regs);
97 static inline struct uprobe *kp2up(struct kprobe *p)
99 return container_of(p, struct uprobe, kp);
102 static inline struct kprobe *up2kp(struct uprobe *p)
107 void disarm_uprobe(struct uprobe *p);
109 int trampoline_uprobe_handler(struct kprobe *p, struct pt_regs *regs);
111 #endif /* _DBI_UPROBES_H */