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| author | David S. Miller <davem@davemloft.net> | 2017-04-17 18:25:07 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-04-22 12:10:52 -0700 |
| commit | 6b3d4eec7f34c21df80191bfd72657404dad0f0a (patch) | |
| tree | 1c4c965f906db226dd298a719df6359cec2ea391 /arch/sparc/net/bpf_jit_32.h | |
| parent | fb796707d7a6c9b24fdf80b9b4f24fa5ffcf0ec5 (diff) | |
| download | linux-6b3d4eec7f34c21df80191bfd72657404dad0f0a.tar.bz2 | |
sparc: Split BPF JIT into 32-bit and 64-bit.
This is in preparation for adding the 64-bit eBPF JIT.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/net/bpf_jit_32.h')
| -rw-r--r-- | arch/sparc/net/bpf_jit_32.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/arch/sparc/net/bpf_jit_32.h b/arch/sparc/net/bpf_jit_32.h new file mode 100644 index 000000000000..33d6b375ff12 --- /dev/null +++ b/arch/sparc/net/bpf_jit_32.h @@ -0,0 +1,68 @@ +#ifndef _BPF_JIT_H +#define _BPF_JIT_H + +/* Conventions: + * %g1 : temporary + * %g2 : Secondary temporary used by SKB data helper stubs. + * %g3 : packet offset passed into SKB data helper stubs. + * %o0 : pointer to skb (first argument given to JIT function) + * %o1 : BPF A accumulator + * %o2 : BPF X accumulator + * %o3 : Holds saved %o7 so we can call helper functions without needing + * to allocate a register window. + * %o4 : skb->len - skb->data_len + * %o5 : skb->data + */ + +#ifndef __ASSEMBLER__ +#define G0 0x00 +#define G1 0x01 +#define G3 0x03 +#define G6 0x06 +#define O0 0x08 +#define O1 0x09 +#define O2 0x0a +#define O3 0x0b +#define O4 0x0c +#define O5 0x0d +#define SP 0x0e +#define O7 0x0f +#define FP 0x1e + +#define r_SKB O0 +#define r_A O1 +#define r_X O2 +#define r_saved_O7 O3 +#define r_HEADLEN O4 +#define r_SKB_DATA O5 +#define r_TMP G1 +#define r_TMP2 G2 +#define r_OFF G3 + +/* assembly code in arch/sparc/net/bpf_jit_asm.S */ +extern u32 bpf_jit_load_word[]; +extern u32 bpf_jit_load_half[]; +extern u32 bpf_jit_load_byte[]; +extern u32 bpf_jit_load_byte_msh[]; +extern u32 bpf_jit_load_word_positive_offset[]; +extern u32 bpf_jit_load_half_positive_offset[]; +extern u32 bpf_jit_load_byte_positive_offset[]; +extern u32 bpf_jit_load_byte_msh_positive_offset[]; +extern u32 bpf_jit_load_word_negative_offset[]; +extern u32 bpf_jit_load_half_negative_offset[]; +extern u32 bpf_jit_load_byte_negative_offset[]; +extern u32 bpf_jit_load_byte_msh_negative_offset[]; + +#else +#define r_SKB %o0 +#define r_A %o1 +#define r_X %o2 +#define r_saved_O7 %o3 +#define r_HEADLEN %o4 +#define r_SKB_DATA %o5 +#define r_TMP %g1 +#define r_TMP2 %g2 +#define r_OFF %g3 +#endif + +#endif /* _BPF_JIT_H */ |