1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _BPF_JIT_H |
3 | #define _BPF_JIT_H |
4 | |
5 | /* Conventions: |
6 | * %g1 : temporary |
7 | * %g2 : Secondary temporary used by SKB data helper stubs. |
8 | * %g3 : packet offset passed into SKB data helper stubs. |
9 | * %o0 : pointer to skb (first argument given to JIT function) |
10 | * %o1 : BPF A accumulator |
11 | * %o2 : BPF X accumulator |
12 | * %o3 : Holds saved %o7 so we can call helper functions without needing |
13 | * to allocate a register window. |
14 | * %o4 : skb->len - skb->data_len |
15 | * %o5 : skb->data |
16 | */ |
17 | |
18 | #ifndef __ASSEMBLER__ |
19 | #define G0 0x00 |
20 | #define G1 0x01 |
21 | #define G3 0x03 |
22 | #define G6 0x06 |
23 | #define O0 0x08 |
24 | #define O1 0x09 |
25 | #define O2 0x0a |
26 | #define O3 0x0b |
27 | #define O4 0x0c |
28 | #define O5 0x0d |
29 | #define SP 0x0e |
30 | #define O7 0x0f |
31 | #define FP 0x1e |
32 | |
33 | #define r_SKB O0 |
34 | #define r_A O1 |
35 | #define r_X O2 |
36 | #define r_saved_O7 O3 |
37 | #define r_HEADLEN O4 |
38 | #define r_SKB_DATA O5 |
39 | #define r_TMP G1 |
40 | #define r_TMP2 G2 |
41 | #define r_OFF G3 |
42 | |
43 | /* assembly code in arch/sparc/net/bpf_jit_asm_32.S */ |
44 | extern u32 bpf_jit_load_word[]; |
45 | extern u32 bpf_jit_load_half[]; |
46 | extern u32 bpf_jit_load_byte[]; |
47 | extern u32 bpf_jit_load_byte_msh[]; |
48 | extern u32 bpf_jit_load_word_positive_offset[]; |
49 | extern u32 bpf_jit_load_half_positive_offset[]; |
50 | extern u32 bpf_jit_load_byte_positive_offset[]; |
51 | extern u32 bpf_jit_load_byte_msh_positive_offset[]; |
52 | extern u32 bpf_jit_load_word_negative_offset[]; |
53 | extern u32 bpf_jit_load_half_negative_offset[]; |
54 | extern u32 bpf_jit_load_byte_negative_offset[]; |
55 | extern u32 bpf_jit_load_byte_msh_negative_offset[]; |
56 | |
57 | #else |
58 | #define r_SKB %o0 |
59 | #define r_A %o1 |
60 | #define r_X %o2 |
61 | #define r_saved_O7 %o3 |
62 | #define r_HEADLEN %o4 |
63 | #define r_SKB_DATA %o5 |
64 | #define r_TMP %g1 |
65 | #define r_TMP2 %g2 |
66 | #define r_OFF %g3 |
67 | #endif |
68 | |
69 | #endif /* _BPF_JIT_H */ |
70 | |