lib/bpf.h

/* Minimal extended BPF constants as alternative for linux/bpf.h.  */

#ifndef _ELFUTILS_BPF_H
#define _ELFUTILS_BPF_H 1

#include <stdint.h>

#define BPF_CLASS(code) ((code) & 0x07)

#define BPF_LD    0x00
#define BPF_LDX   0x01
#define BPF_ST    0x02
#define BPF_STX   0x03
#define BPF_ALU   0x04
#define BPF_JMP   0x05
#define BPF_RET   0x06
#define BPF_MISC  0x07

#define BPF_ALU64 0x07

#define BPF_JNE  0x50
#define BPF_JSGT 0x60
#define BPF_JSGE 0x70
#define BPF_CALL 0x80
#define BPF_EXIT 0x90

#define BPF_W 0x00
#define BPF_H 0x08
#define BPF_B 0x10

#define BPF_IMM 0x00
#define BPF_ABS 0x20
#define BPF_IND 0x40
#define BPF_MEM 0x60
#define BPF_LEN 0x80
#define BPF_MSH 0xa0

#define BPF_DW   0x18
#define BPF_XADD 0xc0

#define BPF_ADD 0x00
#define BPF_SUB 0x10
#define BPF_MUL 0x20
#define BPF_DIV 0x30
#define BPF_OR  0x40
#define BPF_AND 0x50
#define BPF_LSH 0x60
#define BPF_RSH 0x70
#define BPF_NEG 0x80
#define BPF_MOD 0x90
#define BPF_XOR 0xa0

#define BPF_MOV  0xb0
#define BPF_ARSH 0xc0

#define BPF_JA   0x00
#define BPF_JEQ  0x10
#define BPF_JGT  0x20
#define BPF_JGE  0x30
#define BPF_JSET 0x40

#define BPF_K 0x00
#define BPF_X 0x08

#define BPF_END   0xd0
#define BPF_TO_LE 0x00
#define BPF_TO_BE 0x08

#define BPF_PSEUDO_MAP_FD 1

#define MAX_BPF_REG 10

struct bpf_insn
{
  uint8_t code;
  uint8_t dst_reg:4;
  uint8_t src_reg:4;
  int16_t off;
  int32_t imm;
};

#endif