LXR linux/arch/arm/probes/decode-thumb.h

   1/*
   2 * arch/arm/probes/decode-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#include "decode.h"
  19
  20/*
  21 * True if current instruction is in an IT block.
  22 */
  23#define in_it_block(cpsr)       ((cpsr & 0x06000c00) != 0x00000000)
  24
  25/*
  26 * Return the condition code to check for the currently executing instruction.
  27 * This is in ITSTATE<7:4> which is in CPSR<15:12> but is only valid if
  28 * in_it_block returns true.
  29 */
  30#define current_cond(cpsr)      ((cpsr >> 12) & 0xf)
  31
  32enum probes_t32_action {
  33        PROBES_T32_EMULATE_NONE,
  34        PROBES_T32_SIMULATE_NOP,
  35        PROBES_T32_LDMSTM,
  36        PROBES_T32_LDRDSTRD,
  37        PROBES_T32_TABLE_BRANCH,
  38        PROBES_T32_TST,
  39        PROBES_T32_CMP,
  40        PROBES_T32_MOV,
  41        PROBES_T32_ADDSUB,
  42        PROBES_T32_LOGICAL,
  43        PROBES_T32_ADDWSUBW_PC,
  44        PROBES_T32_ADDWSUBW,
  45        PROBES_T32_MOVW,
  46        PROBES_T32_SAT,
  47        PROBES_T32_BITFIELD,
  48        PROBES_T32_SEV,
  49        PROBES_T32_WFE,
  50        PROBES_T32_MRS,
  51        PROBES_T32_BRANCH_COND,
  52        PROBES_T32_BRANCH,
  53        PROBES_T32_PLDI,
  54        PROBES_T32_LDR_LIT,
  55        PROBES_T32_LDRSTR,
  56        PROBES_T32_SIGN_EXTEND,
  57        PROBES_T32_MEDIA,
  58        PROBES_T32_REVERSE,
  59        PROBES_T32_MUL_ADD,
  60        PROBES_T32_MUL_ADD2,
  61        PROBES_T32_MUL_ADD_LONG,
  62        NUM_PROBES_T32_ACTIONS
  63};
  64
  65enum probes_t16_action {
  66        PROBES_T16_ADD_SP,
  67        PROBES_T16_CBZ,
  68        PROBES_T16_SIGN_EXTEND,
  69        PROBES_T16_PUSH,
  70        PROBES_T16_POP,
  71        PROBES_T16_SEV,
  72        PROBES_T16_WFE,
  73        PROBES_T16_IT,
  74        PROBES_T16_CMP,
  75        PROBES_T16_ADDSUB,
  76        PROBES_T16_LOGICAL,
  77        PROBES_T16_BLX,
  78        PROBES_T16_HIREGOPS,
  79        PROBES_T16_LDR_LIT,
  80        PROBES_T16_LDRHSTRH,
  81        PROBES_T16_LDRSTR,
  82        PROBES_T16_ADR,
  83        PROBES_T16_LDMSTM,
  84        PROBES_T16_BRANCH_COND,
  85        PROBES_T16_BRANCH,
  86        NUM_PROBES_T16_ACTIONS
  87};
  88
  89extern const union decode_item probes_decode_thumb32_table[];
  90extern const union decode_item probes_decode_thumb16_table[];
  91
  92enum probes_insn __kprobes
  93thumb16_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
  94                bool emulate, const union decode_action *actions,
  95                const struct decode_checker *checkers[]);
  96enum probes_insn __kprobes
  97thumb32_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
  98                bool emulate, const union decode_action *actions,
  99                const struct decode_checker *checkers[]);
 100
 101#endif
 102