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 */ 44extern u32 bpf_jit_load_word[]; 45extern u32 bpf_jit_load_half[]; 46extern u32 bpf_jit_load_byte[]; 47extern u32 bpf_jit_load_byte_msh[]; 48extern u32 bpf_jit_load_word_positive_offset[]; 49extern u32 bpf_jit_load_half_positive_offset[]; 50extern u32 bpf_jit_load_byte_positive_offset[]; 51extern u32 bpf_jit_load_byte_msh_positive_offset[]; 52extern u32 bpf_jit_load_word_negative_offset[]; 53extern u32 bpf_jit_load_half_negative_offset[]; 54extern u32 bpf_jit_load_byte_negative_offset[]; 55extern 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