73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
/* $NetBSD: bpfjit.h,v 1.1 2012/10/27 22:36:14 alnsn Exp $ */
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/*-
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* Copyright (c) 2011-2012 Alexander Nasonov.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _NET_BPFJIT_H_
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#define _NET_BPFJIT_H_
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#ifndef _KERNEL
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#include <stddef.h>
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#include <stdint.h>
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#endif
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#include <sys/types.h>
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#ifdef __linux
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#include <pcap-bpf.h>
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#else
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#include <net/bpf.h>
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#endif
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/*
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* RETURN value and arguments of a function generated by sljit have sljit_uw
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* type which can have a greater width than arguments below. In such cases,
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* we rely on the fact that calling conventions use same registers for
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* smaller types.
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* SLJIT_MOV_UI is passed to sljit_emit_return() to make sure that the
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* return value is truncated to unsigned int.
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*/
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typedef unsigned int (*bpfjit_function_t)(const uint8_t *,
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unsigned int, unsigned int);
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bpfjit_function_t bpfjit_generate_code(struct bpf_insn *, size_t);
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void bpfjit_free_code(bpfjit_function_t);
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#ifdef _KERNEL
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struct bpfjit_ops
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{
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bpfjit_function_t (*bj_generate_code)(struct bpf_insn *, size_t);
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void (*bj_free_code)(bpfjit_function_t);
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};
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extern struct bpfjit_ops bpfjit_module_ops;
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#endif
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#endif /* !_NET_BPFJIT_H_ */
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