arch/arm/probes/decode-thumb.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * arch/arm/probes/decode-thumb.h
   4  *
   5  * Copyright 2013 Linaro Ltd.
   6  * Written by: David A. Long
   7  */
   8
   9 #ifndef _ARM_KERNEL_PROBES_THUMB_H
  10 #define  _ARM_KERNEL_PROBES_THUMB_H
  11
  12 #include "decode.h"
  13
  14 /*
  15  * True if current instruction is in an IT block.
  16  */
  17 #define in_it_block(cpsr)       ((cpsr & 0x06000c00) != 0x00000000)
  18
  19 /*
  20  * Return the condition code to check for the currently executing instruction.
  21  * This is in ITSTATE<7:4> which is in CPSR<15:12> but is only valid if
  22  * in_it_block returns true.
  23  */
  24 #define current_cond(cpsr)      ((cpsr >> 12) & 0xf)
  25
  26 enum probes_t32_action {
  27         PROBES_T32_EMULATE_NONE,
  28         PROBES_T32_SIMULATE_NOP,
  29         PROBES_T32_LDMSTM,
  30         PROBES_T32_LDRDSTRD,
  31         PROBES_T32_TABLE_BRANCH,
  32         PROBES_T32_TST,
  33         PROBES_T32_CMP,
  34         PROBES_T32_MOV,
  35         PROBES_T32_ADDSUB,
  36         PROBES_T32_LOGICAL,
  37         PROBES_T32_ADDWSUBW_PC,
  38         PROBES_T32_ADDWSUBW,
  39         PROBES_T32_MOVW,
  40         PROBES_T32_SAT,
  41         PROBES_T32_BITFIELD,
  42         PROBES_T32_SEV,
  43         PROBES_T32_WFE,
  44         PROBES_T32_MRS,
  45         PROBES_T32_BRANCH_COND,
  46         PROBES_T32_BRANCH,
  47         PROBES_T32_PLDI,
  48         PROBES_T32_LDR_LIT,
  49         PROBES_T32_LDRSTR,
  50         PROBES_T32_SIGN_EXTEND,
  51         PROBES_T32_MEDIA,
  52         PROBES_T32_REVERSE,
  53         PROBES_T32_MUL_ADD,
  54         PROBES_T32_MUL_ADD2,
  55         PROBES_T32_MUL_ADD_LONG,
  56         NUM_PROBES_T32_ACTIONS
  57 };
  58
  59 enum probes_t16_action {
  60         PROBES_T16_ADD_SP,
  61         PROBES_T16_CBZ,
  62         PROBES_T16_SIGN_EXTEND,
  63         PROBES_T16_PUSH,
  64         PROBES_T16_POP,
  65         PROBES_T16_SEV,
  66         PROBES_T16_WFE,
  67         PROBES_T16_IT,
  68         PROBES_T16_CMP,
  69         PROBES_T16_ADDSUB,
  70         PROBES_T16_LOGICAL,
  71         PROBES_T16_BLX,
  72         PROBES_T16_HIREGOPS,
  73         PROBES_T16_LDR_LIT,
  74         PROBES_T16_LDRHSTRH,
  75         PROBES_T16_LDRSTR,
  76         PROBES_T16_ADR,
  77         PROBES_T16_LDMSTM,
  78         PROBES_T16_BRANCH_COND,
  79         PROBES_T16_BRANCH,
  80         NUM_PROBES_T16_ACTIONS
  81 };
  82
  83 extern const union decode_item probes_decode_thumb32_table[];
  84 extern const union decode_item probes_decode_thumb16_table[];
  85
  86 enum probes_insn __kprobes
  87 thumb16_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
  88                 bool emulate, const union decode_action *actions,
  89                 const struct decode_checker *checkers[]);
  90 enum probes_insn __kprobes
  91 thumb32_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
  92                 bool emulate, const union decode_action *actions,
  93                 const struct decode_checker *checkers[]);
  94
  95 #endif