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

   1 /* Copyright (C) 1991-2024 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, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <stddef.h>
  19 #include <setjmp.h>
  20 #include <signal.h>
  21 #include <pthreadP.h>
  22 #include <jmpbuf-unwind.h>
  23
  24 extern void __sigstack_longjmp (__jmp_buf, int)
  25      __attribute__ ((noreturn));
  26
  27 /* Like __libc_siglongjmp(), but safe for crossing from alternate
  28    signal stack to normal stack.  Needed by NPTL.  */
  29 void
  30 __libc_unwind_longjmp (sigjmp_buf env, int val)
  31 {
  32   /* Perform any cleanups needed by the frames being unwound.  */
  33   __pthread_cleanup_upto (env->__jmpbuf, CURRENT_STACK_FRAME);
  34
  35   if (env[0].__mask_was_saved)
  36     /* Restore the saved signal mask.  */
  37     __sigprocmask (SIG_SETMASK, &env[0].__saved_mask, NULL);
  38
  39   /* Call the machine-dependent function to restore machine state.  */
  40   __sigstack_longjmp (env[0].__jmpbuf, val ?: 1);
  41 }
  42 hidden_def (__libc_unwind_longjmp)