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uprobes.h
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1 #ifndef _ASM_UPROBES_H
2 #define _ASM_UPROBES_H
3 /*
4  * User-space Probes (UProbes) for x86
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, 2008-2011
21  * Authors:
22  * Srikar Dronamraju
23  * Jim Keniston
24  */
25 
26 #include <linux/notifier.h>
27 
29 
30 #define MAX_UINSN_BYTES 16
31 #define UPROBE_XOL_SLOT_BYTES 128 /* to keep it cache aligned */
32 
33 #define UPROBE_SWBP_INSN 0xcc
34 #define UPROBE_SWBP_INSN_SIZE 1
35 
36 struct arch_uprobe {
39 #ifdef CONFIG_X86_64
40  unsigned long rip_rela_target_address;
41 #endif
42 };
43 
44 struct arch_uprobe_task {
45 #ifdef CONFIG_X86_64
46  unsigned long saved_scratch_register;
47 #endif
48  unsigned int saved_trap_nr;
49  unsigned int saved_tf;
50 };
51 
52 extern int arch_uprobe_analyze_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long addr);
53 extern int arch_uprobe_pre_xol(struct arch_uprobe *aup, struct pt_regs *regs);
54 extern int arch_uprobe_post_xol(struct arch_uprobe *aup, struct pt_regs *regs);
55 extern bool arch_uprobe_xol_was_trapped(struct task_struct *tsk);
56 extern int arch_uprobe_exception_notify(struct notifier_block *self, unsigned long val, void *data);
57 extern void arch_uprobe_abort_xol(struct arch_uprobe *aup, struct pt_regs *regs);
58 #endif /* _ASM_UPROBES_H */