1 files changed, 46 insertions, 0 deletions
diff --git a/kernel/exec_domain.c b/kernel/exec_domain.c
new file mode 100644
index 000000000..33f07c5f2
--- /dev/null
+++ b/kernel/exec_domain.c
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Handling of different ABIs (personalities).
+ *
+ * We group personalities into execution domains which have their
+ * own handlers for kernel entry points, signal mapping, etc...
+ *
+ * 2001-05-06	Complete rewrite,  Christoph Hellwig (hch@infradead.org)
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/kmod.h>
+#include <linux/module.h>
+#include <linux/personality.h>
+#include <linux/proc_fs.h>
+#include <linux/sched.h>
+#include <linux/seq_file.h>
+#include <linux/syscalls.h>
+#include <linux/sysctl.h>
+#include <linux/types.h>
+
+#ifdef CONFIG_PROC_FS
+static int execdomains_proc_show(struct seq_file *m, void *v)
+{
+	seq_puts(m, "0-0\tLinux           \t[kernel]\n");
+	return 0;
+}
+
+static int __init proc_execdomains_init(void)
+{
+	proc_create_single("execdomains", 0, NULL, execdomains_proc_show);
+	return 0;
+}
+module_init(proc_execdomains_init);
+#endif
+
+SYSCALL_DEFINE1(personality, unsigned int, personality)
+{
+	unsigned int old = current->personality;
+
+	if (personality != 0xffffffff)
+		set_personality(personality);
+
+	return old;
+}