nptl/sysdeps/unix/sysv/linux/ia64/unwind_longjmp.c

   1 /* Copyright (C) 1991,92,94,95,97,98,2000,02,04 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   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
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  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
  19 #include <stddef.h>
  20 #include <setjmp.h>
  21 #include <signal.h>
  22 #include <pthreadP.h>
  23 #include <jmpbuf-unwind.h>
  24
  25 extern void __sigstack_longjmp (__jmp_buf, int)
  26      __attribute__ ((noreturn));
  27
  28 /* Like __libc_siglongjmp(), but safe for crossing from alternate
  29    signal stack to normal stack.  Needed by NPTL.  */
  30 void
  31 __libc_unwind_longjmp (sigjmp_buf env, int val)
  32 {
  33   /* Perform any cleanups needed by the frames being unwound.  */
  34   __pthread_cleanup_upto (env->__jmpbuf, CURRENT_STACK_FRAME);
  35
  36   if (env[0].__mask_was_saved)
  37     /* Restore the saved signal mask.  */
  38     (void) __sigprocmask (SIG_SETMASK, &env[0].__saved_mask,
  39                           (sigset_t *) NULL);
  40
  41   /* Call the machine-dependent function to restore machine state.  */
  42   __sigstack_longjmp (env[0].__jmpbuf, val ?: 1);
  43 }
  44 hidden_def (__libc_unwind_longjmp)