5c48b108ec
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/*
|
|
* Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#include "linux/sched.h"
|
|
#include "linux/shm.h"
|
|
#include "linux/ipc.h"
|
|
#include "linux/syscalls.h"
|
|
#include "asm/mman.h"
|
|
#include "asm/uaccess.h"
|
|
#include "asm/unistd.h"
|
|
|
|
/*
|
|
* The prototype on i386 is:
|
|
*
|
|
* int clone(int flags, void * child_stack, int * parent_tidptr, struct user_desc * newtls, int * child_tidptr)
|
|
*
|
|
* and the "newtls" arg. on i386 is read by copy_thread directly from the
|
|
* register saved on the stack.
|
|
*/
|
|
long sys_clone(unsigned long clone_flags, unsigned long newsp,
|
|
int __user *parent_tid, void *newtls, int __user *child_tid)
|
|
{
|
|
long ret;
|
|
|
|
if (!newsp)
|
|
newsp = UPT_SP(¤t->thread.regs.regs);
|
|
|
|
current->thread.forking = 1;
|
|
ret = do_fork(clone_flags, newsp, ¤t->thread.regs, 0, parent_tid,
|
|
child_tid);
|
|
current->thread.forking = 0;
|
|
return ret;
|
|
}
|
|
|
|
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))
|
|
return -EFAULT;
|
|
__get_user(new_ka.sa.sa_flags, &act->sa_flags);
|
|
__get_user(mask, &act->sa_mask);
|
|
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))
|
|
return -EFAULT;
|
|
__put_user(old_ka.sa.sa_flags, &oact->sa_flags);
|
|
__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
|
|
}
|
|
|
|
return ret;
|
|
}
|