]>
git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - include/linux/uprobes.h
1 #ifndef _LINUX_UPROBES_H
2 #define _LINUX_UPROBES_H
4 * User-space Probes (UProbes)
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 * Copyright (C) IBM Corporation, 2008-2012
24 * Copyright (C) 2011-2012 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com>
27 #include <linux/errno.h>
28 #include <linux/rbtree.h>
30 struct vm_area_struct
;
34 #ifdef CONFIG_ARCH_SUPPORTS_UPROBES
35 # include <asm/uprobes.h>
38 struct uprobe_consumer
{
39 int (*handler
)(struct uprobe_consumer
*self
, struct pt_regs
*regs
);
41 * filter is optional; If a filter exists, handler is run
42 * if and only if filter returns true.
44 bool (*filter
)(struct uprobe_consumer
*self
, struct task_struct
*task
);
46 struct uprobe_consumer
*next
;
50 enum uprobe_task_state
{
58 * uprobe_task: Metadata of a task while it singlesteps.
61 enum uprobe_task_state state
;
62 struct arch_uprobe_task autask
;
64 struct uprobe
*active_uprobe
;
66 unsigned long xol_vaddr
;
71 * On a breakpoint hit, thread contests for a slot. It frees the
72 * slot after singlestep. Currently a fixed number of slots are
76 wait_queue_head_t wq
; /* if all slots are busy */
77 atomic_t slot_count
; /* number of in-use slots */
78 unsigned long *bitmap
; /* 0 = free slot */
82 * We keep the vma's vm_start rather than a pointer to the vma
83 * itself. The probed process or a naughty kernel module could make
84 * the vma go away, and we must handle that reasonably gracefully.
86 unsigned long vaddr
; /* Page(s) of instruction slots */
89 struct uprobes_state
{
90 struct xol_area
*xol_area
;
93 extern int __weak
set_swbp(struct arch_uprobe
*aup
, struct mm_struct
*mm
, unsigned long vaddr
);
94 extern int __weak
set_orig_insn(struct arch_uprobe
*aup
, struct mm_struct
*mm
, unsigned long vaddr
);
95 extern bool __weak
is_swbp_insn(uprobe_opcode_t
*insn
);
96 extern int uprobe_register(struct inode
*inode
, loff_t offset
, struct uprobe_consumer
*uc
);
97 extern void uprobe_unregister(struct inode
*inode
, loff_t offset
, struct uprobe_consumer
*uc
);
98 extern int uprobe_mmap(struct vm_area_struct
*vma
);
99 extern void uprobe_munmap(struct vm_area_struct
*vma
, unsigned long start
, unsigned long end
);
100 extern void uprobe_dup_mmap(struct mm_struct
*oldmm
, struct mm_struct
*newmm
);
101 extern void uprobe_free_utask(struct task_struct
*t
);
102 extern void uprobe_copy_process(struct task_struct
*t
);
103 extern unsigned long __weak
uprobe_get_swbp_addr(struct pt_regs
*regs
);
104 extern void __weak
arch_uprobe_enable_step(struct arch_uprobe
*arch
);
105 extern void __weak
arch_uprobe_disable_step(struct arch_uprobe
*arch
);
106 extern int uprobe_post_sstep_notifier(struct pt_regs
*regs
);
107 extern int uprobe_pre_sstep_notifier(struct pt_regs
*regs
);
108 extern void uprobe_notify_resume(struct pt_regs
*regs
);
109 extern bool uprobe_deny_signal(void);
110 extern bool __weak
arch_uprobe_skip_sstep(struct arch_uprobe
*aup
, struct pt_regs
*regs
);
111 extern void uprobe_clear_state(struct mm_struct
*mm
);
112 #else /* !CONFIG_UPROBES */
113 struct uprobes_state
{
116 uprobe_register(struct inode
*inode
, loff_t offset
, struct uprobe_consumer
*uc
)
121 uprobe_unregister(struct inode
*inode
, loff_t offset
, struct uprobe_consumer
*uc
)
124 static inline int uprobe_mmap(struct vm_area_struct
*vma
)
129 uprobe_munmap(struct vm_area_struct
*vma
, unsigned long start
, unsigned long end
)
133 uprobe_dup_mmap(struct mm_struct
*oldmm
, struct mm_struct
*newmm
)
136 static inline void uprobe_notify_resume(struct pt_regs
*regs
)
139 static inline bool uprobe_deny_signal(void)
143 static inline unsigned long uprobe_get_swbp_addr(struct pt_regs
*regs
)
147 static inline void uprobe_free_utask(struct task_struct
*t
)
150 static inline void uprobe_copy_process(struct task_struct
*t
)
153 static inline void uprobe_clear_state(struct mm_struct
*mm
)
156 #endif /* !CONFIG_UPROBES */
157 #endif /* _LINUX_UPROBES_H */