arch/arm/include/asm/kprobes.h

   1 /*
   2  * arch/arm/include/asm/kprobes.h
   3  *
   4  * Copyright (C) 2006, 2007 Motorola Inc.
   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 version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  */
  15
  16 #ifndef _ARM_KPROBES_H
  17 #define _ARM_KPROBES_H
  18
  19 #include <linux/types.h>
  20 #include <linux/ptrace.h>
  21 #include <linux/percpu.h>
  22
  23 #define __ARCH_WANT_KPROBES_INSN_SLOT
  24 #define MAX_INSN_SIZE                   2
  25 #define MAX_STACK_SIZE                  64      /* 32 would probably be OK */
  26
  27 #define flush_insn_slot(p)              do { } while (0)
  28 #define kretprobe_blacklist_size        0
  29
  30 typedef u32 kprobe_opcode_t;
  31
  32 struct kprobe;
  33 typedef void (kprobe_insn_handler_t)(struct kprobe *, struct pt_regs *);
  34 typedef unsigned long (kprobe_check_cc)(unsigned long);
  35 typedef void (kprobe_insn_singlestep_t)(struct kprobe *, struct pt_regs *);
  36 typedef void (kprobe_insn_fn_t)(void);
  37
  38 /* Architecture specific copy of original instruction. */
  39 struct arch_specific_insn {
  40         kprobe_opcode_t                 *insn;
  41         kprobe_insn_handler_t           *insn_handler;
  42         kprobe_check_cc                 *insn_check_cc;
  43         kprobe_insn_singlestep_t        *insn_singlestep;
  44         kprobe_insn_fn_t                *insn_fn;
  45 };
  46
  47 struct prev_kprobe {
  48         struct kprobe *kp;
  49         unsigned int status;
  50 };
  51
  52 /* per-cpu kprobe control block */
  53 struct kprobe_ctlblk {
  54         unsigned int kprobe_status;
  55         struct prev_kprobe prev_kprobe;
  56         struct pt_regs jprobe_saved_regs;
  57         char jprobes_stack[MAX_STACK_SIZE];
  58 };
  59
  60 void arch_remove_kprobe(struct kprobe *);
  61 int kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr);
  62 int kprobe_exceptions_notify(struct notifier_block *self,
  63                              unsigned long val, void *data);
  64
  65
  66 #endif /* _ARM_KPROBES_H */