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David S. Miller2809a20872012-04-15 20:06:27 -07001#ifndef _BPF_JIT_H
2#define _BPF_JIT_H
3
4/* Conventions:
5 * %g1 : temporary
6 * %g2 : Secondary temporary used by SKB data helper stubs.
7 * %o0 : pointer to skb (first argument given to JIT function)
8 * %o1 : BPF A accumulator
9 * %o2 : BPF X accumulator
10 * %o3 : Holds saved %o7 so we can call helper functions without needing
11 * to allocate a register window.
12 * %o4 : skb->data
13 * %o5 : skb->len - skb->data_len
14 */
15
16#ifndef __ASSEMBLER__
17#define G0 0x00
18#define G1 0x01
19#define G3 0x03
20#define G6 0x06
21#define O0 0x08
22#define O1 0x09
23#define O2 0x0a
24#define O3 0x0b
25#define O4 0x0c
26#define O5 0x0d
27#define SP 0x0e
28#define O7 0x0f
29#define FP 0x1e
30
31#define r_SKB O0
32#define r_A O1
33#define r_X O2
34#define r_saved_O7 O3
35#define r_HEADLEN O4
36#define r_SKB_DATA O5
37#define r_TMP G1
38#define r_TMP2 G2
39#define r_OFF G3
40#else
41#define r_SKB %o0
42#define r_A %o1
43#define r_X %o2
44#define r_saved_O7 %o3
45#define r_HEADLEN %o4
46#define r_SKB_DATA %o5
47#define r_TMP %g1
48#define r_TMP2 %g2
49#define r_OFF %g3
50#endif
51
52#endif /* _BPF_JIT_H */