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>
29 #include <linux/types.h>
31 struct vm_area_struct;
34 struct notifier_block;
37 #define UPROBE_HANDLER_REMOVE 1
38 #define UPROBE_HANDLER_MASK 1
40 #define MAX_URETPROBE_DEPTH 64
42 enum uprobe_filter_ctx {
43 UPROBE_FILTER_REGISTER,
44 UPROBE_FILTER_UNREGISTER,
48 struct uprobe_consumer {
49 int (*handler)(struct uprobe_consumer *self, struct pt_regs *regs);
50 int (*ret_handler)(struct uprobe_consumer *self,
52 struct pt_regs *regs);
53 bool (*filter)(struct uprobe_consumer *self,
54 enum uprobe_filter_ctx ctx,
55 struct mm_struct *mm);
57 struct uprobe_consumer *next;
61 #include <asm/uprobes.h>
63 enum uprobe_task_state {
71 * uprobe_task: Metadata of a task while it singlesteps.
74 enum uprobe_task_state state;
78 struct arch_uprobe_task autask;
83 struct callback_head dup_xol_work;
84 unsigned long dup_xol_addr;
88 struct uprobe *active_uprobe;
89 unsigned long xol_vaddr;
91 struct return_instance *return_instances;
95 struct return_instance {
96 struct uprobe *uprobe;
98 unsigned long stack; /* stack pointer */
99 unsigned long orig_ret_vaddr; /* original return address */
100 bool chained; /* true, if instance is nested */
102 struct return_instance *next; /* keep as stack */
113 struct uprobes_state {
114 struct xol_area *xol_area;
117 extern int set_swbp(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr);
118 extern int set_orig_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr);
119 extern bool is_swbp_insn(uprobe_opcode_t *insn);
120 extern bool is_trap_insn(uprobe_opcode_t *insn);
121 extern unsigned long uprobe_get_swbp_addr(struct pt_regs *regs);
122 extern unsigned long uprobe_get_trap_addr(struct pt_regs *regs);
123 extern int uprobe_write_opcode(struct mm_struct *mm, unsigned long vaddr, uprobe_opcode_t);
124 extern int uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *uc);
125 extern int uprobe_apply(struct inode *inode, loff_t offset, struct uprobe_consumer *uc, bool);
126 extern void uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consumer *uc);
127 extern int uprobe_mmap(struct vm_area_struct *vma);
128 extern void uprobe_munmap(struct vm_area_struct *vma, unsigned long start, unsigned long end);
129 extern void uprobe_start_dup_mmap(void);
130 extern void uprobe_end_dup_mmap(void);
131 extern void uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm);
132 extern void uprobe_free_utask(struct task_struct *t);
133 extern void uprobe_copy_process(struct task_struct *t, unsigned long flags);
134 extern int uprobe_post_sstep_notifier(struct pt_regs *regs);
135 extern int uprobe_pre_sstep_notifier(struct pt_regs *regs);
136 extern void uprobe_notify_resume(struct pt_regs *regs);
137 extern bool uprobe_deny_signal(void);
138 extern bool arch_uprobe_skip_sstep(struct arch_uprobe *aup, struct pt_regs *regs);
139 extern void uprobe_clear_state(struct mm_struct *mm);
140 extern int arch_uprobe_analyze_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long addr);
141 extern int arch_uprobe_pre_xol(struct arch_uprobe *aup, struct pt_regs *regs);
142 extern int arch_uprobe_post_xol(struct arch_uprobe *aup, struct pt_regs *regs);
143 extern bool arch_uprobe_xol_was_trapped(struct task_struct *tsk);
144 extern int arch_uprobe_exception_notify(struct notifier_block *self, unsigned long val, void *data);
145 extern void arch_uprobe_abort_xol(struct arch_uprobe *aup, struct pt_regs *regs);
146 extern unsigned long arch_uretprobe_hijack_return_addr(unsigned long trampoline_vaddr, struct pt_regs *regs);
147 extern bool arch_uretprobe_is_alive(struct return_instance *ret, enum rp_check ctx, struct pt_regs *regs);
148 extern bool arch_uprobe_ignore(struct arch_uprobe *aup, struct pt_regs *regs);
149 extern void arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr,
150 void *src, unsigned long len);
151 #else /* !CONFIG_UPROBES */
152 struct uprobes_state {
155 #define uprobe_get_trap_addr(regs) instruction_pointer(regs)
158 uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *uc)
163 uprobe_apply(struct inode *inode, loff_t offset, struct uprobe_consumer *uc, bool add)
168 uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consumer *uc)
171 static inline int uprobe_mmap(struct vm_area_struct *vma)
176 uprobe_munmap(struct vm_area_struct *vma, unsigned long start, unsigned long end)
179 static inline void uprobe_start_dup_mmap(void)
182 static inline void uprobe_end_dup_mmap(void)
186 uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm)
189 static inline void uprobe_notify_resume(struct pt_regs *regs)
192 static inline bool uprobe_deny_signal(void)
196 static inline void uprobe_free_utask(struct task_struct *t)
199 static inline void uprobe_copy_process(struct task_struct *t, unsigned long flags)
202 static inline void uprobe_clear_state(struct mm_struct *mm)
205 #endif /* !CONFIG_UPROBES */
206 #endif /* _LINUX_UPROBES_H */