cregit-Linux how code gets into the kernel

Release 4.7 include/uapi/linux/bpf_common.h

Directory: include/uapi/linux
#ifndef _UAPI__LINUX_BPF_COMMON_H__

#define _UAPI__LINUX_BPF_COMMON_H__

/* Instruction classes */

#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

/* ld/ldx fields */

#define BPF_SIZE(code)  ((code) & 0x18)

#define		BPF_W		0x00

#define		BPF_H		0x08

#define		BPF_B		0x10

#define BPF_MODE(code)  ((code) & 0xe0)

#define		BPF_IMM		0x00

#define		BPF_ABS		0x20

#define		BPF_IND		0x40

#define		BPF_MEM		0x60

#define		BPF_LEN		0x80

#define		BPF_MSH		0xa0

/* alu/jmp fields */

#define BPF_OP(code)    ((code) & 0xf0)

#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_JA		0x00

#define		BPF_JEQ		0x10

#define		BPF_JGT		0x20

#define		BPF_JGE		0x30

#define		BPF_JSET        0x40

#define BPF_SRC(code)   ((code) & 0x08)

#define		BPF_K		0x00

#define		BPF_X		0x08

#ifndef BPF_MAXINSNS

#define BPF_MAXINSNS 4096
#endif

#endif /* _UAPI__LINUX_BPF_COMMON_H__ */

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Directory: include/uapi/linux



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