include/linux/bpf_common.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 #ifndef __LINUX_BPF_COMMON_H__
   3 #define __LINUX_BPF_COMMON_H__
   4
   5 /* Instruction classes */
   6 #define BPF_CLASS(code) ((code) & 0x07)
   7 #define         BPF_LD          0x00
   8 #define         BPF_LDX         0x01
   9 #define         BPF_ST          0x02
  10 #define         BPF_STX         0x03
  11 #define         BPF_ALU         0x04
  12 #define         BPF_JMP         0x05
  13 #define         BPF_RET         0x06
  14 #define         BPF_MISC        0x07
  15
  16 /* ld/ldx fields */
  17 #define BPF_SIZE(code)  ((code) & 0x18)
  18 #define         BPF_W           0x00 /* 32-bit */
  19 #define         BPF_H           0x08 /* 16-bit */
  20 #define         BPF_B           0x10 /*  8-bit */
  21 /* eBPF         BPF_DW          0x18    64-bit */
  22 #define BPF_MODE(code)  ((code) & 0xe0)
  23 #define         BPF_IMM         0x00
  24 #define         BPF_ABS         0x20
  25 #define         BPF_IND         0x40
  26 #define         BPF_MEM         0x60
  27 #define         BPF_LEN         0x80
  28 #define         BPF_MSH         0xa0
  29
  30 /* alu/jmp fields */
  31 #define BPF_OP(code)    ((code) & 0xf0)
  32 #define         BPF_ADD         0x00
  33 #define         BPF_SUB         0x10
  34 #define         BPF_MUL         0x20
  35 #define         BPF_DIV         0x30
  36 #define         BPF_OR          0x40
  37 #define         BPF_AND         0x50
  38 #define         BPF_LSH         0x60
  39 #define         BPF_RSH         0x70
  40 #define         BPF_NEG         0x80
  41 #define         BPF_MOD         0x90
  42 #define         BPF_XOR         0xa0
  43
  44 #define         BPF_JA          0x00
  45 #define         BPF_JEQ         0x10
  46 #define         BPF_JGT         0x20
  47 #define         BPF_JGE         0x30
  48 #define         BPF_JSET        0x40
  49 #define BPF_SRC(code)   ((code) & 0x08)
  50 #define         BPF_K           0x00
  51 #define         BPF_X           0x08
  52
  53 #ifndef BPF_MAXINSNS
  54 #define BPF_MAXINSNS 4096
  55 #endif
  56
  57 #endif /* __LINUX_BPF_COMMON_H__ */