fork.S 1.4 KB

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  1. /* Copyright (C) 2000, 2002 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Lesser General Public
  5. License as published by the Free Software Foundation; either
  6. version 2.1 of the License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library; if not, write to the Free
  13. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  14. 02111-1307 USA. */
  15. #include "sysdep.h"
  16. #define _SIGNAL_H
  17. #include <bits/signum.h>
  18. /* pid_t fork(void); */
  19. /* Implemented as a clone system call with parameters SIGCHLD and 0 */
  20. #ifdef __UCLIBC_HAS_THREADS__
  21. .weak fork
  22. #endif
  23. ENTRY(fork)
  24. alloc r2=ar.pfs,0,0,2,0
  25. mov out0=SIGCHLD /* Return SIGCHLD when child finishes */
  26. /* no other clone flags; nothing shared */
  27. mov out1=0 /* Standard sp value. */
  28. ;;
  29. DO_CALL (SYS_ify (clone))
  30. cmp.eq p6,p0=-1,r10
  31. (p6) br.cond.spnt.few __syscall_error
  32. ret
  33. PSEUDO_END(fork)
  34. #ifdef __UCLIBC_HAS_THREADS__
  35. strong_alias(fork,__libc_fork)
  36. #endif
  37. libc_hidden_def(fork)