pt-vfork.S 1.4 KB

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  1. /* Copyright (C) 2005 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, see
  13. <http://www.gnu.org/licenses/>. */
  14. #include <features.h>
  15. #include <tls.h>
  16. /* Save the PID value. */
  17. #define SAVE_PID \
  18. READ_THREAD_POINTER(v1); /* Get the thread pointer. */ \
  19. lw a2, PID_OFFSET(v1); /* Load the saved PID. */ \
  20. subu a2, $0, a2; /* Negate it. */ \
  21. sw a2, PID_OFFSET(v1); /* Store the temporary PID. */
  22. /* Restore the old PID value in the parent. */
  23. #define RESTORE_PID \
  24. beqz v0, 1f; /* If we are the parent... */ \
  25. READ_THREAD_POINTER(v1); /* Get the thread pointer. */ \
  26. lw a2, PID_OFFSET(v1); /* Load the saved PID. */ \
  27. subu a2, $0, a2; /* Re-negate it. */ \
  28. sw a2, PID_OFFSET(v1); /* Restore the PID. */ \
  29. 1:
  30. #include <../../../../../../../libc/sysdeps/linux/mips/vfork.S>