/* $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_ */
