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