add initial version of ujail and utrace

[project/procd.git] / jail / seccomp-bpf.h

diff --git a/jail/seccomp-bpf.h b/jail/seccomp-bpf.h
new file mode 100644 (file)
index 0000000..1cc2908
--- /dev/null
+++ b/jail/seccomp-bpf.h
@@ -0,0 +1,77 @@
+/*
+ * 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 <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]
+# define ARCH_NR       AUDIT_ARCH_MIPSEL
+#else
+# warning "Platform does not support seccomp filter yet"
+# define REG_SYSCALL   0
+# define ARCH_NR       0
+#endif
+
+#endif /* _SECCOMP_BPF_H_ */