83803d97da
This patch introdces 'checker' to decoding phase, and calls checkers when instruction decoding. This allows further decoding for specific instructions. This patch introduces a stub call of checkers in kprobe arch_prepare_kprobe() as an example and for further expansion. Signed-off-by: Wang Nan <wangnan0@huawei.com> Reviewed-by: Jon Medhurst <tixy@linaro.org> Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Jon Medhurst <tixy@linaro.org>
102 lines
2.4 KiB
C
102 lines
2.4 KiB
C
/*
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* arch/arm/probes/decode-thumb.h
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*
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* Copyright 2013 Linaro Ltd.
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* Written by: David A. Long
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*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#ifndef _ARM_KERNEL_PROBES_THUMB_H
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#define _ARM_KERNEL_PROBES_THUMB_H
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#include "decode.h"
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/*
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* True if current instruction is in an IT block.
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*/
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#define in_it_block(cpsr) ((cpsr & 0x06000c00) != 0x00000000)
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/*
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* Return the condition code to check for the currently executing instruction.
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* This is in ITSTATE<7:4> which is in CPSR<15:12> but is only valid if
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* in_it_block returns true.
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*/
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#define current_cond(cpsr) ((cpsr >> 12) & 0xf)
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enum probes_t32_action {
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PROBES_T32_EMULATE_NONE,
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PROBES_T32_SIMULATE_NOP,
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PROBES_T32_LDMSTM,
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PROBES_T32_LDRDSTRD,
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PROBES_T32_TABLE_BRANCH,
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PROBES_T32_TST,
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PROBES_T32_CMP,
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PROBES_T32_MOV,
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PROBES_T32_ADDSUB,
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PROBES_T32_LOGICAL,
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PROBES_T32_ADDWSUBW_PC,
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PROBES_T32_ADDWSUBW,
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PROBES_T32_MOVW,
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PROBES_T32_SAT,
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PROBES_T32_BITFIELD,
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PROBES_T32_SEV,
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PROBES_T32_WFE,
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PROBES_T32_MRS,
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PROBES_T32_BRANCH_COND,
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PROBES_T32_BRANCH,
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PROBES_T32_PLDI,
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PROBES_T32_LDR_LIT,
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PROBES_T32_LDRSTR,
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PROBES_T32_SIGN_EXTEND,
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PROBES_T32_MEDIA,
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PROBES_T32_REVERSE,
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PROBES_T32_MUL_ADD,
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PROBES_T32_MUL_ADD2,
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PROBES_T32_MUL_ADD_LONG,
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NUM_PROBES_T32_ACTIONS
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};
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enum probes_t16_action {
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PROBES_T16_ADD_SP,
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PROBES_T16_CBZ,
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PROBES_T16_SIGN_EXTEND,
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PROBES_T16_PUSH,
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PROBES_T16_POP,
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PROBES_T16_SEV,
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PROBES_T16_WFE,
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PROBES_T16_IT,
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PROBES_T16_CMP,
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PROBES_T16_ADDSUB,
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PROBES_T16_LOGICAL,
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PROBES_T16_BLX,
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PROBES_T16_HIREGOPS,
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PROBES_T16_LDR_LIT,
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PROBES_T16_LDRHSTRH,
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PROBES_T16_LDRSTR,
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PROBES_T16_ADR,
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PROBES_T16_LDMSTM,
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PROBES_T16_BRANCH_COND,
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PROBES_T16_BRANCH,
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NUM_PROBES_T16_ACTIONS
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};
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extern const union decode_item probes_decode_thumb32_table[];
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extern const union decode_item probes_decode_thumb16_table[];
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enum probes_insn __kprobes
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thumb16_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
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bool emulate, const union decode_action *actions,
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const struct decode_checker *checkers[]);
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enum probes_insn __kprobes
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thumb32_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
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bool emulate, const union decode_action *actions,
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const struct decode_checker *checkers[]);
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#endif
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