githubmirror/libseccomp

src/arch.h
76 строк2 KB
Paul Moore
all: relicense the library from GPLv2 to LGPLv2.1
10 апр 2012, 02:07
10 апр 2012, 02:07160e7c1
/**
 * Enhanced Seccomp Architecture/Machine Specific Code
 *
 * Copyright (c) 2012 Red Hat <pmoore@redhat.com>
 * Author: Paul Moore <pmoore@redhat.com>
 */

/*
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of version 2.1 of the GNU Lesser General Public License as
 * published by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, see <http://www.gnu.org/licenses>.
 */

#ifndef _ARCH_H
#define _ARCH_H

#include <inttypes.h>
#include <stddef.h>

#include <seccomp.h>

#include "system.h"

struct db_api_arg;

struct arch_def {
	uint32_t token;
	enum {
		ARCH_SIZE_UNSPEC = 0,
		ARCH_SIZE_32 = 32,
		ARCH_SIZE_64 = 64,
	} size;
	enum {
		ARCH_ENDIAN_UNSPEC = 0,
		ARCH_ENDIAN_LITTLE,
		ARCH_ENDIAN_BIG,
	} endian;
};

/* arch_def for the current process */
extern const struct arch_def arch_def_native;

#define DATUM_MAX	((scmp_datum_t)-1)
#define D64_LO(x)	((uint32_t)((uint64_t)(x) & 0x00000000ffffffff))
#define D64_HI(x)	((uint32_t)((uint64_t)(x) >> 32))

int arch_arg_count_max(const struct arch_def *arch);


/**
 * Determine the argument offset
 * @param _arg the argument number
 *
 * Return the correct offset of the given argument.
 *
 */
#define arch_arg_offset(_arg)	(offsetof(struct seccomp_data, args[_arg]))

int arch_arg_offset_lo(const struct arch_def *arch, unsigned int arg);
int arch_arg_offset_hi(const struct arch_def *arch, unsigned int arg);

int arch_syscall_rewrite(const struct arch_def *arch, int *syscall);

int arch_filter_rewrite(const struct arch_def *arch,
			unsigned int strict,
			int *syscall, struct db_api_arg *chain);

#endif