pt-vfork.S 1.3 KB

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  1. /* Copyright (C) 1999, 2002, 2004 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. Contributed by Andreas Schwab <schwab@gnu.org>.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA. */
  16. #include <tcb-offsets.h>
  17. /* Save the PID value. */
  18. #define SAVE_PID \
  19. movl %gs:PID, %edx; \
  20. movl %edx, %eax; \
  21. negl %eax; \
  22. movl %eax, %gs:PID
  23. /* Restore the old PID value in the parent. */
  24. #define RESTORE_PID \
  25. testl %eax, %eax; \
  26. je 1f; \
  27. movl %edx, %gs:PID; \
  28. 1:
  29. #include <../../../../../../../libc/sysdeps/linux/i386/vfork.S>