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Linux/kernel/exec_domain.c

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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 #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 

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