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1 | #ifndef _LINUX_UPROBES_H |
2 | #define _LINUX_UPROBES_H | |
3 | /* | |
7b2d81d4 | 4 | * User-space Probes (UProbes) |
2b144498 SD |
5 | * |
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. | |
10 | * | |
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. | |
15 | * | |
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. | |
19 | * | |
35aa621b | 20 | * Copyright (C) IBM Corporation, 2008-2012 |
2b144498 SD |
21 | * Authors: |
22 | * Srikar Dronamraju | |
23 | * Jim Keniston | |
35aa621b | 24 | * Copyright (C) 2011-2012 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com> |
2b144498 SD |
25 | */ |
26 | ||
27 | #include <linux/errno.h> | |
28 | #include <linux/rbtree.h> | |
29 | ||
30 | struct vm_area_struct; | |
0326f5a9 | 31 | |
2b144498 | 32 | #ifdef CONFIG_ARCH_SUPPORTS_UPROBES |
0326f5a9 | 33 | # include <asm/uprobes.h> |
2b144498 SD |
34 | #endif |
35 | ||
2b144498 | 36 | /* flags that denote/change uprobes behaviour */ |
7b2d81d4 | 37 | |
2b144498 | 38 | /* Have a copy of original instruction */ |
900771a4 | 39 | #define UPROBE_COPY_INSN 0x1 |
7b2d81d4 | 40 | |
2b144498 | 41 | /* Dont run handlers when first register/ last unregister in progress*/ |
900771a4 | 42 | #define UPROBE_RUN_HANDLER 0x2 |
0326f5a9 SD |
43 | /* Can skip singlestep */ |
44 | #define UPROBE_SKIP_SSTEP 0x4 | |
2b144498 SD |
45 | |
46 | struct uprobe_consumer { | |
47 | int (*handler)(struct uprobe_consumer *self, struct pt_regs *regs); | |
48 | /* | |
49 | * filter is optional; If a filter exists, handler is run | |
50 | * if and only if filter returns true. | |
51 | */ | |
52 | bool (*filter)(struct uprobe_consumer *self, struct task_struct *task); | |
53 | ||
54 | struct uprobe_consumer *next; | |
55 | }; | |
56 | ||
2b144498 | 57 | #ifdef CONFIG_UPROBES |
0326f5a9 SD |
58 | enum uprobe_task_state { |
59 | UTASK_RUNNING, | |
60 | UTASK_BP_HIT, | |
61 | UTASK_SSTEP, | |
62 | UTASK_SSTEP_ACK, | |
63 | UTASK_SSTEP_TRAPPED, | |
64 | }; | |
65 | ||
66 | /* | |
67 | * uprobe_task: Metadata of a task while it singlesteps. | |
68 | */ | |
69 | struct uprobe_task { | |
70 | enum uprobe_task_state state; | |
71 | struct arch_uprobe_task autask; | |
72 | ||
73 | struct uprobe *active_uprobe; | |
74 | ||
75 | unsigned long xol_vaddr; | |
76 | unsigned long vaddr; | |
77 | }; | |
78 | ||
5cb4ac3a | 79 | extern int __weak set_swbp(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr); |
e3343e6a | 80 | extern int __weak set_orig_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr, bool verify); |
5cb4ac3a | 81 | extern bool __weak is_swbp_insn(uprobe_opcode_t *insn); |
e3343e6a SD |
82 | extern int uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *uc); |
83 | extern void uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consumer *uc); | |
7b2d81d4 | 84 | extern int uprobe_mmap(struct vm_area_struct *vma); |
0326f5a9 SD |
85 | extern void uprobe_free_utask(struct task_struct *t); |
86 | extern void uprobe_copy_process(struct task_struct *t); | |
87 | extern unsigned long __weak uprobe_get_swbp_addr(struct pt_regs *regs); | |
88 | extern int uprobe_post_sstep_notifier(struct pt_regs *regs); | |
89 | extern int uprobe_pre_sstep_notifier(struct pt_regs *regs); | |
90 | extern void uprobe_notify_resume(struct pt_regs *regs); | |
91 | extern bool uprobe_deny_signal(void); | |
92 | extern bool __weak arch_uprobe_skip_sstep(struct arch_uprobe *aup, struct pt_regs *regs); | |
93 | #else /* !CONFIG_UPROBES */ | |
7b2d81d4 | 94 | static inline int |
e3343e6a | 95 | uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *uc) |
2b144498 SD |
96 | { |
97 | return -ENOSYS; | |
98 | } | |
7b2d81d4 | 99 | static inline void |
e3343e6a | 100 | uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consumer *uc) |
2b144498 SD |
101 | { |
102 | } | |
7b2d81d4 | 103 | static inline int uprobe_mmap(struct vm_area_struct *vma) |
2b144498 SD |
104 | { |
105 | return 0; | |
106 | } | |
0326f5a9 SD |
107 | static inline void uprobe_notify_resume(struct pt_regs *regs) |
108 | { | |
109 | } | |
110 | static inline bool uprobe_deny_signal(void) | |
111 | { | |
112 | return false; | |
113 | } | |
114 | static inline unsigned long uprobe_get_swbp_addr(struct pt_regs *regs) | |
115 | { | |
116 | return 0; | |
117 | } | |
118 | static inline void uprobe_free_utask(struct task_struct *t) | |
119 | { | |
120 | } | |
121 | static inline void uprobe_copy_process(struct task_struct *t) | |
122 | { | |
123 | } | |
124 | #endif /* !CONFIG_UPROBES */ | |
2b144498 | 125 | #endif /* _LINUX_UPROBES_H */ |