arch/arm64/kernel/probes/decode-insn.h

   1 /*
   2  * arch/arm64/kernel/probes/decode-insn.h
   3  *
   4  * Copyright (C) 2013 Linaro Limited.
   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_KERNEL_KPROBES_ARM64_H
  17 #define _ARM_KERNEL_KPROBES_ARM64_H
  18
  19 #include <asm/kprobes.h>
  20
  21 /*
  22  * ARM strongly recommends a limit of 128 bytes between LoadExcl and
  23  * StoreExcl instructions in a single thread of execution. So keep the
  24  * max atomic context size as 32.
  25  */
  26 #define MAX_ATOMIC_CONTEXT_SIZE (128 / sizeof(kprobe_opcode_t))
  27
  28 enum probe_insn {
  29         INSN_REJECTED,
  30         INSN_GOOD_NO_SLOT,
  31         INSN_GOOD,
  32 };
  33
  34 #ifdef CONFIG_KPROBES
  35 enum probe_insn __kprobes
  36 arm_kprobe_decode_insn(kprobe_opcode_t *addr, struct arch_specific_insn *asi);
  37 #endif
  38 enum probe_insn __kprobes
  39 arm_probe_decode_insn(probe_opcode_t insn, struct arch_probe_insn *asi);
  40
  41 #endif /* _ARM_KERNEL_KPROBES_ARM64_H */