sysdeps/s390/longjmp.c

   1 /* Copyright (C) 2013 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    <http://www.gnu.org/licenses/>.
  17
  18    Versioned copy of sysdeps/generic/longjmp.c modified for extended
  19    jmpbuf.  */
  20
  21 #include <shlib-compat.h>
  22 #include <stddef.h>
  23 #include <setjmp.h>
  24 #include <signal.h>
  25
  26 extern void __v2__longjmp (__jmp_buf __env, int __val)
  27      __attribute__ ((__noreturn__));
  28 extern void __v2__libc_longjmp (sigjmp_buf env, int val)
  29      __attribute__ ((__noreturn__));
  30 libc_hidden_proto (__v2__libc_longjmp)
  31
  32 /* Set the signal mask to the one specified in ENV, and jump
  33    to the position specified in ENV, causing the setjmp
  34    call there to return VAL, or 1 if VAL is 0.  */
  35 void
  36 __v2__libc_siglongjmp (sigjmp_buf env, int val)
  37 {
  38   /* Perform any cleanups needed by the frames being unwound.  */
  39   _longjmp_unwind (env, val);
  40
  41   if (env[0].__mask_was_saved)
  42     /* Restore the saved signal mask.  */
  43     (void) __sigprocmask (SIG_SETMASK, &env[0].__saved_mask,
  44                           (sigset_t *) NULL);
  45
  46   /* Call the machine-dependent function to restore machine state.  */
  47   __v2__longjmp (env[0].__jmpbuf, val ?: 1);
  48 }
  49
  50 #ifndef __v2__longjmp
  51 strong_alias (__v2__libc_siglongjmp, __v2__libc_longjmp)
  52 libc_hidden_def (__v2__libc_longjmp)
  53 weak_alias (__v2__libc_siglongjmp, __v2_longjmp)
  54 weak_alias (__v2__libc_siglongjmp, __v2longjmp)
  55 weak_alias (__v2__libc_siglongjmp, __v2siglongjmp)
  56
  57 /* These will be used by libpthread only.  */
  58 versioned_symbol (libc, __v2__libc_longjmp, __libc_longjmp, GLIBC_PRIVATE);
  59 versioned_symbol (libc, __v2__libc_siglongjmp, __libc_siglongjmp, GLIBC_PRIVATE);
  60
  61 versioned_symbol (libc, __v2_longjmp, _longjmp, GLIBC_2_19);
  62 versioned_symbol (libc, __v2longjmp, longjmp, GLIBC_2_19);
  63 versioned_symbol (libc, __v2siglongjmp, siglongjmp, GLIBC_2_19);
  64 #endif /* ifndef __v2__longjmp */