d2ce4e92fa
we only use that to tell copy_thread() done by syscall from that done by kernel_thread(). However, it's easier to do simply by checking PF_KTHREAD in thread flags. Merge sys_clone() guts for 32bit and 64bit, while we are at it... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
/*
|
|
* Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#include <linux/syscalls.h>
|
|
#include <sysdep/syscalls.h>
|
|
|
|
/*
|
|
* The prototype on i386 is:
|
|
*
|
|
* int clone(int flags, void * child_stack, int * parent_tidptr, struct user_desc * newtls
|
|
*
|
|
* and the "newtls" arg. on i386 is read by copy_thread directly from the
|
|
* register saved on the stack.
|
|
*/
|
|
long i386_clone(unsigned long clone_flags, unsigned long newsp,
|
|
int __user *parent_tid, void *newtls, int __user *child_tid)
|
|
{
|
|
return sys_clone(clone_flags, newsp, parent_tid, child_tid);
|
|
}
|
|
|
|
|
|
long sys_sigaction(int sig, const struct old_sigaction __user *act,
|
|
struct old_sigaction __user *oact)
|
|
{
|
|
struct k_sigaction new_ka, old_ka;
|
|
int ret;
|
|
|
|
if (act) {
|
|
old_sigset_t mask;
|
|
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
|
|
__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
|
|
__get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
|
|
__get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
|
|
__get_user(mask, &act->sa_mask))
|
|
return -EFAULT;
|
|
siginitset(&new_ka.sa.sa_mask, mask);
|
|
}
|
|
|
|
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
|
|
|
|
if (!ret && oact) {
|
|
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
|
|
__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
|
|
__put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
|
|
__put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
|
|
__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
|
|
return -EFAULT;
|
|
}
|
|
|
|
return ret;
|
|
}
|