5 * Dynamic Binary Instrumentation Module based on KProbes
6 * modules/uprobe/swap_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 <kprobe/dbi_kprobes.h>
31 #include <uprobe/arch/asm/swap_uprobes.h>
36 struct task_struct *task;
37 struct slot_manager *sm;
38 struct arch_specific_tramp atramp;
41 typedef unsigned long (*uprobe_pre_entry_handler_t)(void *priv_arg, struct pt_regs * regs);
45 /* probe handling code to jump to */
47 // handler whichw willb bec called before 'entry'
48 uprobe_pre_entry_handler_t pre_entry;
53 struct uretprobe_instance;
55 typedef int (*uretprobe_handler_t)(struct uretprobe_instance *, struct pt_regs *);
58 * Function-return probe -
60 * User needs to provide a handler function, and initialize maxactive.
61 * maxactive - The maximum number of instances of the probed function that
62 * can be active concurrently.
63 * nmissed - tracks the number of times the probed function's return was
64 * ignored, due to maxactive being too low.
69 uretprobe_handler_t handler;
70 uretprobe_handler_t entry_handler;
73 struct hlist_head free_instances;
74 struct hlist_head used_instances;
77 /* probe with noreturn (bl,blx) */
79 unsigned thumb_noret:1;
83 struct uretprobe_instance {
84 /* either on free list or used list */
85 struct hlist_node uflist;
86 struct hlist_node hlist;
88 kprobe_opcode_t *ret_addr;
90 struct task_struct *task;
93 int dbi_register_uprobe(struct uprobe *p);
94 void dbi_unregister_uprobe(struct uprobe *p);
95 void __dbi_unregister_uprobe(struct uprobe *up, int disarm);
97 int dbi_register_ujprobe(struct ujprobe *jp);
98 void dbi_unregister_ujprobe(struct ujprobe *jp);
99 void __dbi_unregister_ujprobe(struct ujprobe *jp, int disarm);
101 int dbi_register_uretprobe(struct uretprobe *rp);
102 void dbi_unregister_uretprobe(struct uretprobe *rp);
103 void __dbi_unregister_uretprobe(struct uretprobe *rp, int disarm);
105 void dbi_unregister_all_uprobes(struct task_struct *task);
106 void dbi_discard_pending_uretprobes(struct task_struct *task);
108 void swap_ujprobe_return(void);
109 struct kprobe *get_ukprobe(void *addr, pid_t tgid);
110 struct kprobe *get_ukprobe_by_insn_slot(void *addr, pid_t tgid, struct pt_regs *regs);
112 static inline struct uprobe *kp2up(struct kprobe *p)
114 return container_of(p, struct uprobe, kp);
117 static inline struct kprobe *up2kp(struct uprobe *p)
122 void disarm_uprobe(struct kprobe *p, struct task_struct *task);
124 int trampoline_uprobe_handler(struct kprobe *p, struct pt_regs *regs);
126 void add_uprobe_table(struct kprobe *p);
128 #endif /* _DBI_UPROBES_H */