1 /* $NetBSD: bpfjit.h,v 1.2 2013/11/15 00:12:44 rmind Exp $ */ 2 3 /*- 4 * Copyright (c) 2011-2012 Alexander Nasonov. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 22 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 28 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef _NET_BPFJIT_H_ 33 #define _NET_BPFJIT_H_ 34 35 #ifndef _KERNEL 36 #include <stddef.h> 37 #include <stdint.h> 38 #endif 39 40 #include <sys/types.h> 41 42 #ifdef __linux 43 #include <pcap-bpf.h> 44 #else 45 #include <net/bpf.h> 46 #endif 47 48 /* 49 * RETURN value and arguments of a function generated by sljit have sljit_uw 50 * type which can have a greater width than arguments below. In such cases, 51 * we rely on the fact that calling conventions use same registers for 52 * smaller types. 53 * SLJIT_MOV_UI is passed to sljit_emit_return() to make sure that the 54 * return value is truncated to unsigned int. 55 */ 56 typedef unsigned int (*bpfjit_func_t)(const uint8_t *, 57 unsigned int, unsigned int); 58 59 bpfjit_func_t bpfjit_generate_code(bpf_ctx_t *, struct bpf_insn *, size_t); 60 void bpfjit_free_code(bpfjit_func_t); 61 62 #ifdef _KERNEL 63 struct bpfjit_ops { 64 bpfjit_func_t (*bj_generate_code)(bpf_ctx_t *, struct bpf_insn *, size_t); 65 void (*bj_free_code)(bpfjit_func_t); 66 }; 67 68 extern struct bpfjit_ops bpfjit_module_ops; 69 #endif 70 71 #endif /* !_NET_BPFJIT_H_ */ 72