#include <linux/seccomp.h>
#include <linux/sched.h>
+#include <linux/compat.h>
/* #define SECCOMP_DEBUG 1 */
+#define NR_SECCOMP_MODES 1
/*
* Secure computing mode 1 allows only read/write/exit/sigreturn.
0, /* null terminated */
};
-#ifdef TIF_32BIT
+#ifdef CONFIG_COMPAT
static int mode1_syscalls_32[] = {
__NR_seccomp_read_32, __NR_seccomp_write_32, __NR_seccomp_exit_32, __NR_seccomp_sigreturn_32,
0, /* null terminated */
switch (mode) {
case 1:
syscall = mode1_syscalls;
-#ifdef TIF_32BIT
- if (test_thread_flag(TIF_32BIT))
+#ifdef CONFIG_COMPAT
+ if (is_compat_task())
syscall = mode1_syscalls_32;
#endif
do {
#endif
do_exit(SIGKILL);
}
+
+long prctl_get_seccomp(void)
+{
+ return current->seccomp.mode;
+}
+
+long prctl_set_seccomp(unsigned long seccomp_mode)
+{
+ long ret;
+
+ /* can set it only once to be even more secure */
+ ret = -EPERM;
+ if (unlikely(current->seccomp.mode))
+ goto out;
+
+ ret = -EINVAL;
+ if (seccomp_mode && seccomp_mode <= NR_SECCOMP_MODES) {
+ current->seccomp.mode = seccomp_mode;
+ set_thread_flag(TIF_SECCOMP);
+#ifdef TIF_NOTSC
+ disable_TSC();
+#endif
+ ret = 0;
+ }
+
+ out:
+ return ret;
+}