blob: db444c7218fe53bcabf105b5e2303b7d21a5fd15 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
3 * Licensed under the GPL
4 */
5
Al Virod2ce4e92012-09-20 09:28:25 -04006#include <linux/syscalls.h>
7#include <sysdep/syscalls.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008
9/*
Paolo 'Blaisorblade' Giarrussoaa6758d2006-03-31 02:30:22 -080010 * The prototype on i386 is:
11 *
Al Virod2ce4e92012-09-20 09:28:25 -040012 * int clone(int flags, void * child_stack, int * parent_tidptr, struct user_desc * newtls
Paolo 'Blaisorblade' Giarrussoaa6758d2006-03-31 02:30:22 -080013 *
14 * and the "newtls" arg. on i386 is read by copy_thread directly from the
15 * register saved on the stack.
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 */
Al Virod2ce4e92012-09-20 09:28:25 -040017long i386_clone(unsigned long clone_flags, unsigned long newsp,
18 int __user *parent_tid, void *newtls, int __user *child_tid)
Linus Torvalds1da177e2005-04-16 15:20:36 -070019{
Al Virod2ce4e92012-09-20 09:28:25 -040020 return sys_clone(clone_flags, newsp, parent_tid, child_tid);
Linus Torvalds1da177e2005-04-16 15:20:36 -070021}
22
Al Virod2ce4e92012-09-20 09:28:25 -040023
Linus Torvalds1da177e2005-04-16 15:20:36 -070024long sys_sigaction(int sig, const struct old_sigaction __user *act,
25 struct old_sigaction __user *oact)
26{
27 struct k_sigaction new_ka, old_ka;
28 int ret;
29
30 if (act) {
31 old_sigset_t mask;
32 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
33 __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
Al Viroffc51be2012-04-22 16:34:27 -040034 __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
35 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
36 __get_user(mask, &act->sa_mask))
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 siginitset(&new_ka.sa.sa_mask, mask);
39 }
40
41 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
42
43 if (!ret && oact) {
44 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
45 __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
Al Viroffc51be2012-04-22 16:34:27 -040046 __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
47 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
48 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 }
51
52 return ret;
53}