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/*
* seccomp example for x86 (32-bit and 64-bit) with BPF macros
*
* Copyright (c) 2012 The Chromium OS Authors <chromium-os-dev@chromium.org>
* Authors:
* Will Drewry <wad@chromium.org>
* Kees Cook <keescook@chromium.org>
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef _SECCOMP_BPF_H_
#define _SECCOMP_BPF_H_
#define _GNU_SOURCE 1
#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <errno.h>
#include <signal.h>
#include <string.h>
#include <unistd.h>
#include <endian.h>
#include <sys/prctl.h>
#ifndef PR_SET_NO_NEW_PRIVS
# define PR_SET_NO_NEW_PRIVS 38
#endif
#include <linux/unistd.h>
#include <linux/audit.h>
#include <linux/filter.h>
#ifdef HAVE_LINUX_SECCOMP_H
# include <linux/seccomp.h>
#endif
#ifndef SECCOMP_MODE_FILTER
#define SECCOMP_MODE_FILTER 2 /* uses user-supplied filter. */
#define SECCOMP_RET_KILL 0x00000000U /* kill the task immediately */
#define SECCOMP_RET_TRAP 0x00030000U /* disallow and force a SIGSYS */
#define SECCOMP_RET_ERRNO 0x00050000U /* returns an errno */
#define SECCOMP_RET_LOG 0x00070000U
#define SECCOMP_RET_ALLOW 0x7fff0000U /* allow */
#define SECCOMP_RET_ERROR(x) (SECCOMP_RET_ERRNO | ((x) & 0x0000ffffU))
#define SECCOMP_RET_LOGGER(x) (SECCOMP_RET_LOG | ((x) & 0x0000ffffU))
struct seccomp_data {
int nr;
__u32 arch;
__u64 instruction_pointer;
__u64 args[6];
};
#endif
#ifndef SYS_SECCOMP
# define SYS_SECCOMP 1
#endif
#define syscall_nr (offsetof(struct seccomp_data, nr))
#define arch_nr (offsetof(struct seccomp_data, arch))
#if defined(__i386__)
# define REG_SYSCALL REG_EAX
# define ARCH_NR AUDIT_ARCH_I386
#elif defined(__x86_64__)
# define REG_SYSCALL REG_RAX
# define ARCH_NR AUDIT_ARCH_X86_64
#elif defined(__mips__)
# define REG_SYSCALL regs[2]
# if __BYTE_ORDER == __LITTLE_ENDIAN
# define ARCH_NR AUDIT_ARCH_MIPSEL
# else
# define ARCH_NR AUDIT_ARCH_MIPS
# endif
#elif defined(__arm__) && (defined(__ARM_EABI__) || defined(__thumb__))
# define REG_SYSCALL regs.uregs[7]
# if __BYTE_ORDER == __LITTLE_ENDIAN
# define ARCH_NR AUDIT_ARCH_ARM
# else
# define ARCH_NR AUDIT_ARCH_ARMEB
# endif
#else
# warning "Platform does not support seccomp filter yet"
# define REG_SYSCALL 0
# define ARCH_NR 0
#endif
#endif /* _SECCOMP_BPF_H_ */
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