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
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