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TOMOYO Linux Cross Reference
Linux/include/linux/uprobes.h

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  1 #ifndef _LINUX_UPROBES_H
  2 #define _LINUX_UPROBES_H
  3 /*
  4  * User-space Probes (UProbes)
  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  *
 20  * Copyright (C) IBM Corporation, 2008-2012
 21  * Authors:
 22  *      Srikar Dronamraju
 23  *      Jim Keniston
 24  * Copyright (C) 2011-2012 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com>
 25  */
 26 
 27 #include <linux/errno.h>
 28 #include <linux/rbtree.h>
 29 #include <linux/types.h>
 30 
 31 struct vm_area_struct;
 32 struct mm_struct;
 33 struct inode;
 34 struct notifier_block;
 35 struct page;
 36 
 37 #define UPROBE_HANDLER_REMOVE           1
 38 #define UPROBE_HANDLER_MASK             1
 39 
 40 #define MAX_URETPROBE_DEPTH             64
 41 
 42 enum uprobe_filter_ctx {
 43         UPROBE_FILTER_REGISTER,
 44         UPROBE_FILTER_UNREGISTER,
 45         UPROBE_FILTER_MMAP,
 46 };
 47 
 48 struct uprobe_consumer {
 49         int (*handler)(struct uprobe_consumer *self, struct pt_regs *regs);
 50         int (*ret_handler)(struct uprobe_consumer *self,
 51                                 unsigned long func,
 52                                 struct pt_regs *regs);
 53         bool (*filter)(struct uprobe_consumer *self,
 54                                 enum uprobe_filter_ctx ctx,
 55                                 struct mm_struct *mm);
 56 
 57         struct uprobe_consumer *next;
 58 };
 59 
 60 #ifdef CONFIG_UPROBES
 61 #include <asm/uprobes.h>
 62 
 63 enum uprobe_task_state {
 64         UTASK_RUNNING,
 65         UTASK_SSTEP,
 66         UTASK_SSTEP_ACK,
 67         UTASK_SSTEP_TRAPPED,
 68 };
 69 
 70 /*
 71  * uprobe_task: Metadata of a task while it singlesteps.
 72  */
 73 struct uprobe_task {
 74         enum uprobe_task_state          state;
 75 
 76         union {
 77                 struct {
 78                         struct arch_uprobe_task autask;
 79                         unsigned long           vaddr;
 80                 };
 81 
 82                 struct {
 83                         struct callback_head    dup_xol_work;
 84                         unsigned long           dup_xol_addr;
 85                 };
 86         };
 87 
 88         struct uprobe                   *active_uprobe;
 89         unsigned long                   xol_vaddr;
 90 
 91         struct return_instance          *return_instances;
 92         unsigned int                    depth;
 93 };
 94 
 95 struct xol_area;
 96 
 97 struct uprobes_state {
 98         struct xol_area         *xol_area;
 99 };
100 
101 extern int set_swbp(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr);
102 extern int set_orig_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr);
103 extern bool is_swbp_insn(uprobe_opcode_t *insn);
104 extern bool is_trap_insn(uprobe_opcode_t *insn);
105 extern unsigned long uprobe_get_swbp_addr(struct pt_regs *regs);
106 extern unsigned long uprobe_get_trap_addr(struct pt_regs *regs);
107 extern int uprobe_write_opcode(struct mm_struct *mm, unsigned long vaddr, uprobe_opcode_t);
108 extern int uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *uc);
109 extern int uprobe_apply(struct inode *inode, loff_t offset, struct uprobe_consumer *uc, bool);
110 extern void uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consumer *uc);
111 extern int uprobe_mmap(struct vm_area_struct *vma);
112 extern void uprobe_munmap(struct vm_area_struct *vma, unsigned long start, unsigned long end);
113 extern void uprobe_start_dup_mmap(void);
114 extern void uprobe_end_dup_mmap(void);
115 extern void uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm);
116 extern void uprobe_free_utask(struct task_struct *t);
117 extern void uprobe_copy_process(struct task_struct *t, unsigned long flags);
118 extern int uprobe_post_sstep_notifier(struct pt_regs *regs);
119 extern int uprobe_pre_sstep_notifier(struct pt_regs *regs);
120 extern void uprobe_notify_resume(struct pt_regs *regs);
121 extern bool uprobe_deny_signal(void);
122 extern bool arch_uprobe_skip_sstep(struct arch_uprobe *aup, struct pt_regs *regs);
123 extern void uprobe_clear_state(struct mm_struct *mm);
124 extern int  arch_uprobe_analyze_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long addr);
125 extern int  arch_uprobe_pre_xol(struct arch_uprobe *aup, struct pt_regs *regs);
126 extern int  arch_uprobe_post_xol(struct arch_uprobe *aup, struct pt_regs *regs);
127 extern bool arch_uprobe_xol_was_trapped(struct task_struct *tsk);
128 extern int  arch_uprobe_exception_notify(struct notifier_block *self, unsigned long val, void *data);
129 extern void arch_uprobe_abort_xol(struct arch_uprobe *aup, struct pt_regs *regs);
130 extern unsigned long arch_uretprobe_hijack_return_addr(unsigned long trampoline_vaddr, struct pt_regs *regs);
131 extern bool arch_uprobe_ignore(struct arch_uprobe *aup, struct pt_regs *regs);
132 extern void arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr,
133                                          void *src, unsigned long len);
134 #else /* !CONFIG_UPROBES */
135 struct uprobes_state {
136 };
137 
138 #define uprobe_get_trap_addr(regs)      instruction_pointer(regs)
139 
140 static inline int
141 uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *uc)
142 {
143         return -ENOSYS;
144 }
145 static inline int
146 uprobe_apply(struct inode *inode, loff_t offset, struct uprobe_consumer *uc, bool add)
147 {
148         return -ENOSYS;
149 }
150 static inline void
151 uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consumer *uc)
152 {
153 }
154 static inline int uprobe_mmap(struct vm_area_struct *vma)
155 {
156         return 0;
157 }
158 static inline void
159 uprobe_munmap(struct vm_area_struct *vma, unsigned long start, unsigned long end)
160 {
161 }
162 static inline void uprobe_start_dup_mmap(void)
163 {
164 }
165 static inline void uprobe_end_dup_mmap(void)
166 {
167 }
168 static inline void
169 uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm)
170 {
171 }
172 static inline void uprobe_notify_resume(struct pt_regs *regs)
173 {
174 }
175 static inline bool uprobe_deny_signal(void)
176 {
177         return false;
178 }
179 static inline void uprobe_free_utask(struct task_struct *t)
180 {
181 }
182 static inline void uprobe_copy_process(struct task_struct *t, unsigned long flags)
183 {
184 }
185 static inline void uprobe_clear_state(struct mm_struct *mm)
186 {
187 }
188 #endif /* !CONFIG_UPROBES */
189 #endif  /* _LINUX_UPROBES_H */
190 

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