1/*
2 * Handling of different ABIs (personalities).
3 *
4 * We group personalities into execution domains which have their
5 * own handlers for kernel entry points, signal mapping, etc...
6 *
7 * 2001-05-06	Complete rewrite,  Christoph Hellwig (hch@infradead.org)
8 */
9
10#include <linux/init.h>
11#include <linux/kernel.h>
12#include <linux/kmod.h>
13#include <linux/module.h>
14#include <linux/personality.h>
15#include <linux/proc_fs.h>
16#include <linux/sched.h>
17#include <linux/seq_file.h>
18#include <linux/syscalls.h>
19#include <linux/sysctl.h>
20#include <linux/types.h>
21#include <linux/fs_struct.h>
22
23#ifdef CONFIG_PROC_FS
24static int execdomains_proc_show(struct seq_file *m, void *v)
25{
26	seq_puts(m, "0-0\tLinux           \t[kernel]\n");
27	return 0;
28}
29
30static int execdomains_proc_open(struct inode *inode, struct file *file)
31{
32	return single_open(file, execdomains_proc_show, NULL);
33}
34
35static const struct file_operations execdomains_proc_fops = {
36	.open		= execdomains_proc_open,
37	.read		= seq_read,
38	.llseek		= seq_lseek,
39	.release	= single_release,
40};
41
42static int __init proc_execdomains_init(void)
43{
44	proc_create("execdomains", 0, NULL, &execdomains_proc_fops);
45	return 0;
46}
47module_init(proc_execdomains_init);
48#endif
49
50SYSCALL_DEFINE1(personality, unsigned int, personality)
51{
52	unsigned int old = current->personality;
53
54	if (personality != 0xffffffff)
55		set_personality(personality);
56
57	return old;
58}
59