bpf_jit.h

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#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 */