bpf: split up instructions and extensions from header

Move them into a separate header file, so that it is more clean.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>

1 files changed, 58 insertions, 0 deletions

diff --git a/bpf_insns.h b/bpf_insns.h
new file mode 100644
index 0000000..193f0b7
--- /dev/null
+++ b/bpf_insns.h
@@ -0,0 +1,58 @@
+#ifndef BPF_INSNS_H
+#define BPF_INSNS_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_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
+
+#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
+
+/* ret - BPF_K and BPF_X also apply */
+#define BPF_RVAL(code)	((code) & 0x18)
+#define	BPF_A		0x10
+
+#define BPF_MISCOP(code) ((code) & 0xf8)
+#define	BPF_TAX		0x00
+#define	BPF_TXA		0x80
+
+#endif /* BPF_INSNS_H */