iris
802798ce3c
git-subtree-dir: external/capstone git-subtree-split: e46f64fadb351e9ecd05264fab26f2772feb0994
133 lines
3.6 KiB
C
133 lines
3.6 KiB
C
/* Capstone Disassembly Engine */
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/* BPF Backend by david942j <david942j@gmail.com>, 2019 */
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/* SPDX-FileCopyrightText: 2024 Roee Toledano <roeetoledano10@gmail.com> */
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/* SPDX-License-Identifier: BSD-3 */
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/* This file defines constants and macros used for parsing a BPF instruction */
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#ifndef CS_BPF_CONSTANTS_H
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#define CS_BPF_CONSTANTS_H
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#define BPF_CLASS(code) ((code) & 0x7)
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/// Instruction classes
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#define BPF_CLASS_LD 0x00
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#define BPF_CLASS_LDX 0x01
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#define BPF_CLASS_ST 0x02
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#define BPF_CLASS_STX 0x03
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#define BPF_CLASS_ALU 0x04
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#define BPF_CLASS_JMP 0x05
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/// cBPF only
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#define BPF_CLASS_RET 0x06
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/// eBPF only
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#define BPF_CLASS_JMP32 0x06
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/// cBPF only
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#define BPF_CLASS_MISC 0x07
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/// eBPF only
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#define BPF_CLASS_ALU64 0x07
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#define BPF_OP(code) ((code) & 0xf0)
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///< Types of ALU instruction
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#define BPF_ALU_ADD 0x00
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#define BPF_ALU_SUB 0x10
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#define BPF_ALU_MUL 0x20
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#define BPF_ALU_DIV 0x30
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#define BPF_ALU_OR 0x40
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#define BPF_ALU_AND 0x50
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#define BPF_ALU_LSH 0x60
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#define BPF_ALU_RSH 0x70
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#define BPF_ALU_NEG 0x80
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#define BPF_ALU_MOD 0x90
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#define BPF_ALU_XOR 0xa0
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/// eBPF only: mov reg to reg
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#define BPF_ALU_MOV 0xb0
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/// eBPF only: sign extending shift right
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#define BPF_ALU_ARSH 0xc0
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/// eBPF only: endianness conversion
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#define BPF_ALU_END 0xd0
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///< Types of jmp instruction
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/// goto
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#define BPF_JUMP_JA 0x00
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/// '=='
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#define BPF_JUMP_JEQ 0x10
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/// unsigned '>'
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#define BPF_JUMP_JGT 0x20
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/// unsigned '>='
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#define BPF_JUMP_JGE 0x30
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/// '&'
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#define BPF_JUMP_JSET 0x40
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/// eBPF only: '!=' */
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#define BPF_JUMP_JNE 0x50
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/// eBPF only: signed '>'
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#define BPF_JUMP_JSGT 0x60
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/// eBPF only: signed '>='
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#define BPF_JUMP_JSGE 0x70
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/// eBPF only: function call
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#define BPF_JUMP_CALL 0x80
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/// eBPF only: exit
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#define BPF_JUMP_EXIT 0x90
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/// eBPF only: unsigned '<'
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#define BPF_JUMP_JLT 0xa0
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/// eBPF only: unsigned '<='
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#define BPF_JUMP_JLE 0xb0
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/// eBPF only: signed '<'
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#define BPF_JUMP_JSLT 0xc0
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/// eBPF only: signed '<='
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#define BPF_JUMP_JSLE 0xd0
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/// Types of complex atomic instructions
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/// eBPF only: atomic exchange
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#define BPF_ATOMIC_XCHG 0xe0
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/// eBPF only: atomic compare and exchange
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#define BPF_ATOMIC_CMPXCHG 0xf0
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#define BPF_SRC(code) ((code) & 0x08)
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/// cBPF only: for return types
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#define BPF_RVAL(code) ((code) & 0x18)
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/// Source operand
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#define BPF_SRC_K 0x00
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#define BPF_SRC_X 0x08
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/// cBPF only
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#define BPF_SRC_A 0x10
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#define BPF_SRC_LITTLE BPF_SRC_K
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#define BPF_SRC_BIG BPF_SRC_X
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#define BPF_SIZE(code) ((code) & 0x18)
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/// Size modifier
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/// word
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#define BPF_SIZE_W 0x00
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/// half word
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#define BPF_SIZE_H 0x08
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/// byte
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#define BPF_SIZE_B 0x10
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/// eBPF only: double word
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#define BPF_SIZE_DW 0x18
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#define BPF_MODE(code) ((code) & 0xe0)
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///< Mode modifier
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#define BPF_MODE_IMM 0x00 ///< used for 32-bit mov in cBPF and 64-bit in eBPF
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#define BPF_MODE_ABS \
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0x20 ///< absolute indexing of socket buffer. eBPF only, but deprecated in new versions
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#define BPF_MODE_IND \
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0x40 ///< indirect indexing of socket buffer. eBPF only, but deprecated in new versions
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#define BPF_MODE_MEM 0x60
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/// cBPF only, reserved in eBPF
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#define BPF_MODE_LEN 0x80
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/// cBPF only, reserved in eBPF
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#define BPF_MODE_MSH 0xa0
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/// eBPF only: atomic operations. Originally BPF_MODE_XADD
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#define BPF_MODE_ATOMIC 0xc0
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/// eBPF only: overwrite 'src' with what was in the modified mem address before it was modified.
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/// NOTE: in contrast to regular modifiers, this one is encoded in the 'imm' field, not opcode!
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/// Must be used for BPF_XCHG and BPF_CMPXCHG. Optional for the other atomic operations.
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#define BPF_MODE_FETCH 0x01
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#define BPF_MISCOP(code) ((code) & 0x80)
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/// Operation of misc
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#define BPF_MISCOP_TAX 0x00
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#define BPF_MISCOP_TXA 0x80
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#endif
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