syscalls_32.c

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/* 
 * Copyright (C) 2000 - 2003 Jeff Dike ([email protected])
 * 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;
}