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