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/*-
* Copyright (c) 2002 - 2003 NetGroup, Politecnico di Torino (Italy)
* Copyright (c) 2005 Jung-uk Kim <jkim@FreeBSD.org>
* 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.
* 3. Neither the name of the Politecnico di Torino nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* 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
* OWNER 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_bpf.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/sysctl.h>
#include <net/bpf.h>
#include <net/bpf_jitter.h>
MALLOC_DEFINE(M_BPFJIT, "BPF_JIT", "BPF JIT compiler");
bpf_filter_func bpf_jit_compile(struct bpf_insn *, u_int, int *);
SYSCTL_NODE(_net, OID_AUTO, bpf_jitter, CTLFLAG_RW, 0, "BPF JIT compiler");
int bpf_jitter_enable = 1;
SYSCTL_INT(_net_bpf_jitter, OID_AUTO, enable, CTLFLAG_RW,
&bpf_jitter_enable, 0, "enable BPF JIT compiler");
bpf_jit_filter *
bpf_jitter(struct bpf_insn *fp, int nins)
{
bpf_jit_filter *filter;
/* Allocate the filter structure */
filter = (struct bpf_jit_filter *)malloc(sizeof(struct bpf_jit_filter),
M_BPFJIT, M_NOWAIT);
if (filter == NULL)
return NULL;
/* Allocate the filter's memory */
filter->mem = (int *)malloc(BPF_MEMWORDS * sizeof(int),
M_BPFJIT, M_NOWAIT);
if (filter->mem == NULL) {
free(filter, M_BPFJIT);
return NULL;
}
/* Create the binary */
if ((filter->func = bpf_jit_compile(fp, nins, filter->mem)) == NULL) {
free(filter->mem, M_BPFJIT);
free(filter, M_BPFJIT);
return NULL;
}
return filter;
}
void
bpf_destroy_jit_filter(bpf_jit_filter *filter)
{
free(filter->mem, M_BPFJIT);
free(filter->func, M_BPFJIT);
free(filter, M_BPFJIT);
}
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