sysdeps/s390/s390-64/bsd-_setjmp.S

   1 /* BSD `setjmp' entry point to `sigsetjmp (..., 1)'.  64 bit S/390 version.
   2    Copyright (C) 2001, 2002 Free Software Foundation, Inc.
   3    Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
   4    This file is part of the GNU C Library.
   5
   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
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 /* This just does a tail-call to `__sigsetjmp (ARG, 0)'.
  21    We cannot do it in C because it must be a tail-call, so frame-unwinding
  22    in setjmp doesn't clobber the state restored by longjmp.  */
  23
  24 #include <sysdep.h>
  25
  26 ENTRY(_setjmp)
  27         slgr   %r3,%r3              /* Second argument of zero.  */
  28 #ifdef PIC
  29         jg     __sigsetjmp@PLT      /* Branch to PLT of __sigsetjmp.  */
  30 #else
  31         jg     __sigsetjmp          /* Branch to __sigsetjmp.  */
  32 #endif
  33 END (_setjmp)
  34 libc_hidden_def (_setjmp)