sparc/net/bpf_jit_32.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef _BPF_JIT_H
0003 #define _BPF_JIT_H
0004
0005 /* Conventions:
0006  *  %g1 : temporary
0007  *  %g2 : Secondary temporary used by SKB data helper stubs.
0008  *  %g3 : packet offset passed into SKB data helper stubs.
0009  *  %o0 : pointer to skb (first argument given to JIT function)
0010  *  %o1 : BPF A accumulator
0011  *  %o2 : BPF X accumulator
0012  *  %o3 : Holds saved %o7 so we can call helper functions without needing
0013  *        to allocate a register window.
0014  *  %o4 : skb->len - skb->data_len
0015  *  %o5 : skb->data
0016  */
0017
0018 #ifndef __ASSEMBLER__
0019 #define G0      0x00
0020 #define G1      0x01
0021 #define G3      0x03
0022 #define G6      0x06
0023 #define O0      0x08
0024 #define O1      0x09
0025 #define O2      0x0a
0026 #define O3      0x0b
0027 #define O4      0x0c
0028 #define O5      0x0d
0029 #define SP      0x0e
0030 #define O7      0x0f
0031 #define FP      0x1e
0032
0033 #define r_SKB       O0
0034 #define r_A     O1
0035 #define r_X     O2
0036 #define r_saved_O7  O3
0037 #define r_HEADLEN   O4
0038 #define r_SKB_DATA  O5
0039 #define r_TMP       G1
0040 #define r_TMP2      G2
0041 #define r_OFF       G3
0042
0043 /* assembly code in arch/sparc/net/bpf_jit_asm_32.S */
0044 extern u32 bpf_jit_load_word[];
0045 extern u32 bpf_jit_load_half[];
0046 extern u32 bpf_jit_load_byte[];
0047 extern u32 bpf_jit_load_byte_msh[];
0048 extern u32 bpf_jit_load_word_positive_offset[];
0049 extern u32 bpf_jit_load_half_positive_offset[];
0050 extern u32 bpf_jit_load_byte_positive_offset[];
0051 extern u32 bpf_jit_load_byte_msh_positive_offset[];
0052 extern u32 bpf_jit_load_word_negative_offset[];
0053 extern u32 bpf_jit_load_half_negative_offset[];
0054 extern u32 bpf_jit_load_byte_negative_offset[];
0055 extern u32 bpf_jit_load_byte_msh_negative_offset[];
0056
0057 #else
0058 #define r_SKB       %o0
0059 #define r_A     %o1
0060 #define r_X     %o2
0061 #define r_saved_O7  %o3
0062 #define r_HEADLEN   %o4
0063 #define r_SKB_DATA  %o5
0064 #define r_TMP       %g1
0065 #define r_TMP2      %g2
0066 #define r_OFF       %g3
0067 #endif
0068
0069 #endif /* _BPF_JIT_H */