1 /* 2 * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com) 3 * Licensed under the GPL 4 */ 5 6 #include <linux/syscalls.h> 7 #include <sysdep/syscalls.h> 8 9 /* 10 * The prototype on i386 is: 11 * 12 * int clone(int flags, void * child_stack, int * parent_tidptr, struct user_desc * newtls 13 * 14 * and the "newtls" arg. on i386 is read by copy_thread directly from the 15 * register saved on the stack. 16 */ 17 long i386_clone(unsigned long clone_flags, unsigned long newsp, 18 int __user *parent_tid, void *newtls, int __user *child_tid) 19 { 20 return sys_clone(clone_flags, newsp, parent_tid, child_tid); 21 } 22 23 24 long 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) || 34 __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)) 37 return -EFAULT; 38 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) || 46 __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)) 49 return -EFAULT; 50 } 51 52 return ret; 53 } 54