LCOM1920-T02G10

/*        $NetBSD: bpfjit.h,v 1.4 2014/06/25 19:32:37 alnsn Exp $        */

/*-

 * Copyright (c) 2011-2014 Alexander Nasonov.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in

 *    the documentation and/or other materials provided with the

 *    distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE

 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,

 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT

 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

#ifndef _NET_BPFJIT_H_

#define _NET_BPFJIT_H_

#ifndef _KERNEL

#include <stddef.h>

#include <stdint.h>

#endif

#include <sys/types.h>

#ifdef __linux

#include <pcap-bpf.h>

#else

#include <net/bpf.h>

#endif

/*

 * Return value of a function generated by sljit have sljit_uw type

 * which can have a greater width. In such cases, we rely on the fact

 * that calling conventions use same registers for smaller types.

 * SLJIT_MOV_UI is passed to sljit_emit_return() to make sure that the

 * return value is truncated to unsigned int.

 */

typedef unsigned int (*bpfjit_func_t)(const bpf_ctx_t *, bpf_args_t *);

bpfjit_func_t bpfjit_generate_code(const bpf_ctx_t *,

    const struct bpf_insn *, size_t);

void bpfjit_free_code(bpfjit_func_t);

#ifdef _KERNEL

struct bpfjit_ops {

        bpfjit_func_t (*bj_generate_code)(const bpf_ctx_t *,

            const struct bpf_insn *, size_t);

        void (*bj_free_code)(bpfjit_func_t);

};

extern struct bpfjit_ops bpfjit_module_ops;

#endif

#endif /* !_NET_BPFJIT_H_ */