// 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>#include <linux/fs_struct.h> #ifdef CONFIG_PROC_FSstatic int execdomains_proc_show(struct seq_file *m, void *v){	seq_puts(m, "0-0\tLinux           \t[kernel]\n");	return 0;} static int execdomains_proc_open(struct inode *inode, struct file *file){	return single_open(file, execdomains_proc_show, NULL);} static const struct file_operations execdomains_proc_fops = {	.open		= execdomains_proc_open,	.read		= seq_read,	.llseek		= seq_lseek,	.release	= single_release,}; static int __init proc_execdomains_init(void){	proc_create("execdomains", 0, NULL, &execdomains_proc_fops);	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;}