sigrestorer.S 1.4 KB

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  1. /* Copyright (C) 1999 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 <sys/syscall.h>
  16. /* If no SA_RESTORER function was specified by the application we use
  17. one of these. This avoids the need for the kernel to synthesise a return
  18. instruction on the stack, which would involve expensive cache flushes. */
  19. .global __default_sa_restorer
  20. .type __default_sa_restorer,%function
  21. .align 4
  22. __default_sa_restorer:
  23. swi __NR_sigreturn
  24. #ifdef __NR_rt_sigreturn
  25. .global __default_rt_sa_restorer
  26. .type __default_rt_sa_restorer,%function
  27. .align 4
  28. __default_rt_sa_restorer:
  29. swi __NR_rt_sigreturn
  30. #endif