libc/sysdeps/linux/xtensa/fork.c

   1 /*
   2  * fork() for Xtensa uClibc
   3  *
   4  * Copyright (C) 2007 Tensilica Inc.
   5  *
   6  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
   7  */
   8
   9
  10 /* Xtensa doesn't provide a 'fork' system call, so we use 'clone'.  */
  11 #include <sys/syscall.h>
  12
  13 #if defined __NR_clone && defined __ARCH_USE_MMU__
  14 # include <unistd.h>
  15 # include <signal.h>
  16 # include <cancel.h>
  17
  18 pid_t fork(void)
  19 {
  20         return (pid_t) INLINE_SYSCALL(clone, 2, SIGCHLD, 0);
  21 }
  22 # ifdef __UCLIBC_HAS_THREADS__
  23 strong_alias(fork,__libc_fork)
  24 libc_hidden_weak(fork)
  25 # else
  26 libc_hidden_def(fork)
  27 # endif
  28 #endif