syscall.c

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/*
 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 * Licensed under the GPL
 */

#include <linux/file.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/utsname.h>
#include <linux/syscalls.h>
#include <asm/current.h>
#include <asm/mman.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>

long sys_fork(void)
{
    return do_fork(SIGCHLD, UPT_SP(&current->thread.regs.regs),
              &current->thread.regs, 0, NULL, NULL);
}

long sys_vfork(void)
{
    return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
              UPT_SP(&current->thread.regs.regs),
              &current->thread.regs, 0, NULL, NULL);
}

long sys_clone(unsigned long clone_flags, unsigned long newsp,
           void __user *parent_tid, void __user *child_tid)
{
    if (!newsp)
        newsp = UPT_SP(&current->thread.regs.regs);

    return do_fork(clone_flags, newsp, &current->thread.regs, 0, parent_tid,
              child_tid);
}

long old_mmap(unsigned long addr, unsigned long len,
          unsigned long prot, unsigned long flags,
          unsigned long fd, unsigned long offset)
{
    long err = -EINVAL;
    if (offset & ~PAGE_MASK)
        goto out;

    err = sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
 out:
    return err;
}