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1 | // SPDX-License-Identifier: GPL-2.0 | |
2 | /* | |
3 | * Handling of different ABIs (personalities). | |
4 | * | |
5 | * We group personalities into execution domains which have their | |
6 | * own handlers for kernel entry points, signal mapping, etc... | |
7 | * | |
8 | * 2001-05-06 Complete rewrite, Christoph Hellwig (hch@infradead.org) | |
9 | */ | |
10 | ||
11 | #include <linux/init.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/kmod.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/personality.h> | |
16 | #include <linux/proc_fs.h> | |
17 | #include <linux/sched.h> | |
18 | #include <linux/seq_file.h> | |
19 | #include <linux/syscalls.h> | |
20 | #include <linux/sysctl.h> | |
21 | #include <linux/types.h> | |
22 | ||
23 | #ifdef CONFIG_PROC_FS | |
24 | static 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 | ||
30 | static int __init proc_execdomains_init(void) | |
31 | { | |
32 | proc_create_single("execdomains", 0, NULL, execdomains_proc_show); | |
33 | return 0; | |
34 | } | |
35 | module_init(proc_execdomains_init); | |
36 | #endif | |
37 | ||
38 | SYSCALL_DEFINE1(personality, unsigned int, personality) | |
39 | { | |
40 | unsigned int old = current->personality; | |
41 | ||
42 | if (personality != 0xffffffff) | |
43 | set_personality(personality); | |
44 | ||
45 | return old; | |
46 | } |