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 /*
  20  * ARM strongly recommends a limit of 128 bytes between LoadExcl and
  21  * StoreExcl instructions in a single thread of execution. So keep the
  22  * max atomic context size as 32.
  23  */
  24 #define MAX_ATOMIC_CONTEXT_SIZE (128 / sizeof(kprobe_opcode_t))
  25
  26 enum kprobe_insn {
  27         INSN_REJECTED,
  28         INSN_GOOD_NO_SLOT,
  29         INSN_GOOD,
  30 };
  31
  32 enum kprobe_insn __kprobes
  33 arm_kprobe_decode_insn(kprobe_opcode_t *addr, struct arch_specific_insn *asi);
  34
  35 #endif /* _ARM_KERNEL_KPROBES_ARM64_H */