sigrestorer.S 1.5 KB

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  1. /*
  2. * Copyright (C) 2016 Andes Technology, Inc.
  3. * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  4. */
  5. /* Copyright (C) 1999 Free Software Foundation, Inc.
  6. The GNU C Library is free software; you can redistribute it and/or
  7. modify it under the terms of the GNU Lesser General Public
  8. License as published by the Free Software Foundation; either
  9. version 2.1 of the License, or (at your option) any later version.
  10. The GNU C Library is distributed in the hope that it will be useful,
  11. but WITHOUT ANY WARRANTY; without even the implied warranty of
  12. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13. Lesser General Public License for more details.
  14. You should have received a copy of the GNU Lesser General Public
  15. License along with the GNU C Library; if not, write to the Free
  16. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17. 02111-1307 USA. */
  18. #include <sysdep.h>
  19. #include <sys/syscall.h>
  20. /* If no SA_RESTORER function was specified by the application we use
  21. one of these. This avoids the need for the kernel to synthesise a return
  22. instruction on the stack, which would involve expensive cache flushes. */
  23. ENTRY(__default_sa_restorer)
  24. /* DO NOT SAVE r7 INTO STACK, THIS SYSCALL NEVER RETURN */
  25. syscall SYS_ify(sigreturn)
  26. END(__default_sa_restorer)
  27. #ifdef __NR_rt_sigreturn
  28. ENTRY(__default_rt_sa_restorer)
  29. /* DO NOT SAVE r7 INTO STACK, THIS SYSCALL NEVER RETURN */
  30. syscall SYS_ify(rt_sigreturn)
  31. END(__default_rt_sa_restorer)
  32. #endif