LXR linux/kernel/exec

   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
  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