arch/arm/kernel/probes-thumb.h

   1 /*
   2  * arch/arm/kernel/probes-thumb.h
   3  *
   4  * Copyright 2013 Linaro Ltd.
   5  * Written by: David A. Long
   6  *
   7  * The code contained herein is licensed under the GNU General Public
   8  * License. You may obtain a copy of the GNU General Public License
   9  * Version 2 or later at the following locations:
  10  *
  11  * http://www.opensource.org/licenses/gpl-license.html
  12  * http://www.gnu.org/copyleft/gpl.html
  13  */
  14
  15 #ifndef _ARM_KERNEL_PROBES_THUMB_H
  16 #define  _ARM_KERNEL_PROBES_THUMB_H
  17
  18 /*
  19  * True if current instruction is in an IT block.
  20  */
  21 #define in_it_block(cpsr)       ((cpsr & 0x06000c00) != 0x00000000)
  22
  23 /*
  24  * Return the condition code to check for the currently executing instruction.
  25  * This is in ITSTATE<7:4> which is in CPSR<15:12> but is only valid if
  26  * in_it_block returns true.
  27  */
  28 #define current_cond(cpsr)      ((cpsr >> 12) & 0xf)
  29
  30 enum probes_t32_action {
  31         PROBES_T32_EMULATE_NONE,
  32         PROBES_T32_SIMULATE_NOP,
  33         PROBES_T32_LDMSTM,
  34         PROBES_T32_LDRDSTRD,
  35         PROBES_T32_TABLE_BRANCH,
  36         PROBES_T32_TST,
  37         PROBES_T32_CMP,
  38         PROBES_T32_MOV,
  39         PROBES_T32_ADDSUB,
  40         PROBES_T32_LOGICAL,
  41         PROBES_T32_ADDWSUBW_PC,
  42         PROBES_T32_ADDWSUBW,
  43         PROBES_T32_MOVW,
  44         PROBES_T32_SAT,
  45         PROBES_T32_BITFIELD,
  46         PROBES_T32_SEV,
  47         PROBES_T32_WFE,
  48         PROBES_T32_MRS,
  49         PROBES_T32_BRANCH_COND,
  50         PROBES_T32_BRANCH,
  51         PROBES_T32_PLDI,
  52         PROBES_T32_LDR_LIT,
  53         PROBES_T32_LDRSTR,
  54         PROBES_T32_SIGN_EXTEND,
  55         PROBES_T32_MEDIA,
  56         PROBES_T32_REVERSE,
  57         PROBES_T32_MUL_ADD,
  58         PROBES_T32_MUL_ADD2,
  59         PROBES_T32_MUL_ADD_LONG,
  60         NUM_PROBES_T32_ACTIONS
  61 };
  62
  63 enum probes_t16_action {
  64         PROBES_T16_ADD_SP,
  65         PROBES_T16_CBZ,
  66         PROBES_T16_SIGN_EXTEND,
  67         PROBES_T16_PUSH,
  68         PROBES_T16_POP,
  69         PROBES_T16_SEV,
  70         PROBES_T16_WFE,
  71         PROBES_T16_IT,
  72         PROBES_T16_CMP,
  73         PROBES_T16_ADDSUB,
  74         PROBES_T16_LOGICAL,
  75         PROBES_T16_BLX,
  76         PROBES_T16_HIREGOPS,
  77         PROBES_T16_LDR_LIT,
  78         PROBES_T16_LDRHSTRH,
  79         PROBES_T16_LDRSTR,
  80         PROBES_T16_ADR,
  81         PROBES_T16_LDMSTM,
  82         PROBES_T16_BRANCH_COND,
  83         PROBES_T16_BRANCH,
  84         NUM_PROBES_T16_ACTIONS
  85 };
  86
  87 extern const union decode_item probes_decode_thumb32_table[];
  88 extern const union decode_item probes_decode_thumb16_table[];
  89
  90 enum probes_insn __kprobes
  91 thumb16_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
  92                 bool emulate, const union decode_action *actions);
  93 enum probes_insn __kprobes
  94 thumb32_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
  95                 bool emulate, const union decode_action *actions);
  96
  97 #endif