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/*
* 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;
}
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