+ current->thread.forking = 1;
+ ret = do_fork(SIGCHLD, UPT_SP(¤t->thread.regs.regs),
+ ¤t->thread.regs, 0, NULL, NULL);
+ current->thread.forking = 0;
+ return(ret);
+}
+
+long sys_vfork(void)
+{
+ long ret;
+
+ current->thread.forking = 1;
+ ret = do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
+ UPT_SP(¤t->thread.regs.regs),
+ ¤t->thread.regs, 0, NULL, NULL);
+ current->thread.forking = 0;
+ return(ret);
+}
+
+/* common code for old and new mmaps */
+long sys_mmap2(unsigned long addr, unsigned long len,
+ unsigned long prot, unsigned long flags,
+ unsigned long fd, unsigned long pgoff)
+{
+ long error = -EBADF;
+ struct file * file = NULL;
+
+ flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+ if (!(flags & MAP_ANONYMOUS)) {
+ file = fget(fd);
+ if (!file)
+ goto out;
+ }
+
+ down_write(¤t->mm->mmap_sem);
+ error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+ up_write(¤t->mm->mmap_sem);
+
+ if (file)
+ fput(file);
+ out:
+ return error;
+}
+
+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_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
+ out:
+ return err;
+}
+/*
+ * sys_pipe() is the normal C calling standard for creating
+ * a pipe. It's not the way unix traditionally does this, though.
+ */
+long sys_pipe(unsigned long __user * fildes)
+{
+ int fd[2];
+ long error;