/* Copyright (C) 2003-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Jakub Jelinek <jakub@redhat.com>.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public License as

   published by the Free Software Foundation; either version 2.1 of the

   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; see the file COPYING.LIB.  If

   not, see <http://www.gnu.org/licenses/>.  */

#include <dlfcn.h>

#include <stdio.h>

#include <unwind.h>

#include <gnu/lib-names.h>

#include <sysdep.h>

#include <unwind-resume.h>

void (*__libgcc_s_resume) (struct _Unwind_Exception *exc)

  attribute_hidden __attribute__ ((noreturn));

static _Unwind_Reason_Code (*libgcc_s_personality) PERSONALITY_PROTO;

void attribute_hidden __attribute__ ((cold))

__libgcc_s_init (void)

{

  void *resume, *personality;

  void *handle;

  /* See include/dlfcn.h. Use of __libc_dlopen requires RTLD_NOW.  */

  handle = __libc_dlopen (LIBGCC_S_SO);

  if (handle == NULL

      || (resume = __libc_dlsym (handle, "_Unwind_Resume")) == NULL

      || (personality = __libc_dlsym (handle, "__gcc_personality_v0")) == NULL)

    __libc_fatal (LIBGCC_S_SO

                  " must be installed for unwinding to work\n");

#ifdef PTR_MANGLE

  PTR_MANGLE (resume);

#endif

  __libgcc_s_resume = resume;

#ifdef PTR_MANGLE

  PTR_MANGLE (personality);

#endif

  libgcc_s_personality = personality;

}

#if !HAVE_ARCH_UNWIND_RESUME

void

_Unwind_Resume (struct _Unwind_Exception *exc)

{

  if (__glibc_unlikely (__libgcc_s_resume == NULL))

    __libgcc_s_init ();

  __typeof (__libgcc_s_resume) resume = __libgcc_s_resume;

#ifdef PTR_DEMANGLE

  PTR_DEMANGLE (resume);

#endif

  (*resume) (exc);

}

#endif

_Unwind_Reason_Code

__gcc_personality_v0 PERSONALITY_PROTO

{

  if (__glibc_unlikely (libgcc_s_personality == NULL))

    __libgcc_s_init ();

  __typeof (libgcc_s_personality) personality = libgcc_s_personality;

#ifdef PTR_DEMANGLE

  PTR_DEMANGLE (personality);

#endif

  return (*personality) PERSONALITY_ARGS;

}