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 */ 43 extern u32 bpf_jit_load_word[]; 44 extern u32 bpf_jit_load_half[]; 45 extern u32 bpf_jit_load_byte[]; 46 extern u32 bpf_jit_load_byte_msh[]; 47 extern u32 bpf_jit_load_word_positive_offset[]; 48 extern u32 bpf_jit_load_half_positive_offset[]; 49 extern u32 bpf_jit_load_byte_positive_offset[]; 50 extern u32 bpf_jit_load_byte_msh_positive_offset[]; 51 extern u32 bpf_jit_load_word_negative_offset[]; 52 extern u32 bpf_jit_load_half_negative_offset[]; 53 extern u32 bpf_jit_load_byte_negative_offset[]; 54 extern 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