kernel/exec_domain.c

   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 }