arch/arm/include/asm/probes.h

   1 /*
   2  * arch/arm/include/asm/probes.h
   3  *
   4  * Original contents copied from arch/arm/include/asm/kprobes.h
   5  * which contains the following notice...
   6  *
   7  * Copyright (C) 2006, 2007 Motorola Inc.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  */
  18
  19 #ifndef _ASM_PROBES_H
  20 #define _ASM_PROBES_H
  21
  22 #ifndef __ASSEMBLY__
  23
  24 typedef u32 probes_opcode_t;
  25
  26 struct arch_probes_insn;
  27 typedef void (probes_insn_handler_t)(probes_opcode_t,
  28                                      struct arch_probes_insn *,
  29                                      struct pt_regs *);
  30 typedef unsigned long (probes_check_cc)(unsigned long);
  31 typedef void (probes_insn_singlestep_t)(probes_opcode_t,
  32                                         struct arch_probes_insn *,
  33                                         struct pt_regs *);
  34 typedef void (probes_insn_fn_t)(void);
  35
  36 /* Architecture specific copy of original instruction. */
  37 struct arch_probes_insn {
  38         probes_opcode_t                 *insn;
  39         probes_insn_handler_t           *insn_handler;
  40         probes_check_cc                 *insn_check_cc;
  41         probes_insn_singlestep_t        *insn_singlestep;
  42         probes_insn_fn_t                *insn_fn;
  43         int                             stack_space;
  44         unsigned long                   register_usage_flags;
  45         bool                            kprobe_direct_exec;
  46 };
  47
  48 #endif /* __ASSEMBLY__ */
  49
  50 /*
  51  * We assume one instruction can consume at most 64 bytes stack, which is
  52  * 'push {r0-r15}'. Instructions consume more or unknown stack space like
  53  * 'str r0, [sp, #-80]' and 'str r0, [sp, r1]' should be prohibit to probe.
  54  * Both kprobe and jprobe use this macro.
  55  */
  56 #define MAX_STACK_SIZE                  64
  57
  58 #endif