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 #include <linux/fs_struct.h> 23 24 #ifdef CONFIG_PROC_FS 25 static int execdomains_proc_show(struct seq_file *m, void *v) 26 { 27 seq_puts(m, "0-0\tLinux \t[kernel]\n"); 28 return 0; 29 } 30 31 static int execdomains_proc_open(struct inode *inode, struct file *file) 32 { 33 return single_open(file, execdomains_proc_show, NULL); 34 } 35 36 static const struct file_operations execdomains_proc_fops = { 37 .open = execdomains_proc_open, 38 .read = seq_read, 39 .llseek = seq_lseek, 40 .release = single_release, 41 }; 42 43 static int __init proc_execdomains_init(void) 44 { 45 proc_create("execdomains", 0, NULL, &execdomains_proc_fops); 46 return 0; 47 } 48 module_init(proc_execdomains_init); 49 #endif 50 51 SYSCALL_DEFINE1(personality, unsigned int, personality) 52 { 53 unsigned int old = current->personality; 54 55 if (personality != 0xffffffff) 56 set_personality(personality); 57 58 return old; 59 } 60