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Linux kernel mirror (for testing)
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linux
1#ifndef _ASM_KPROBES_H
2#define _ASM_KPROBES_H
3/*
4 * Kernel Probes (KProbes)
5 * include/asm-x86_64/kprobes.h
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 *
21 * Copyright (C) IBM Corporation, 2002, 2004
22 *
23 * 2004-Oct Prasanna S Panchamukhi <prasanna@in.ibm.com> and Jim Keniston
24 * kenistoj@us.ibm.com adopted from i386.
25 */
26#include <linux/types.h>
27#include <linux/ptrace.h>
28
29struct pt_regs;
30
31typedef u8 kprobe_opcode_t;
32#define BREAKPOINT_INSTRUCTION 0xcc
33#define MAX_INSN_SIZE 15
34#define MAX_STACK_SIZE 64
35#define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \
36 (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) \
37 ? (MAX_STACK_SIZE) \
38 : (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR)))
39
40#define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)pentry
41#define ARCH_SUPPORTS_KRETPROBES
42
43void kretprobe_trampoline(void);
44
45/* Architecture specific copy of original instruction*/
46struct arch_specific_insn {
47 /* copy of the original instruction */
48 kprobe_opcode_t *insn;
49};
50
51/* trap3/1 are intr gates for kprobes. So, restore the status of IF,
52 * if necessary, before executing the original int3/1 (trap) handler.
53 */
54static inline void restore_interrupts(struct pt_regs *regs)
55{
56 if (regs->eflags & IF_MASK)
57 local_irq_enable();
58}
59
60extern int post_kprobe_handler(struct pt_regs *regs);
61extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
62extern int kprobe_handler(struct pt_regs *regs);
63
64extern int kprobe_exceptions_notify(struct notifier_block *self,
65 unsigned long val, void *data);
66#endif /* _ASM_KPROBES_H */