/* Test setjmp interoperability with static dlopen BZ #21895.

   Copyright (C) 2017-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   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; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <setjmp.h>

#include <stdio.h>

#include <stdlib.h>

#include <dlfcn.h>

/* Set TOC area pointed by sp to zero.  */

#define SET_TOC_TO_ZERO(sp)					 \

  ({								 \

    unsigned int zero = 0;					 \

    asm volatile ("std %0, 24(%1)\n\t" :: "r" (zero), "r" (sp)); \

  })

static void

bar (jmp_buf jb, unsigned long sp)

{

  static int i;

  if (i++==1)

    exit(0);	/* Success.  */

  /* This will set TOC are on caller frame (foo) to zero. __longjmp

     must restore r2 otherwise a segmentation fault will happens after

     it jumps back to foo.  */

  SET_TOC_TO_ZERO(sp);

  longjmp(jb, i);

}

static int

do_test (void)

{

  void *h = dlopen("setjmp-bug21895.so", RTLD_NOW);

  if (!h)

    {

      puts(dlerror());

      return 1;

    }

  void (*pfoo)(void) = dlsym(h, "foo");

  if (!pfoo)

    {

      puts(dlerror());

      return 1;

    }

  void (**ppbar)(jmp_buf, unsigned long) = dlsym(h, "bar");

  if (!ppbar)

    {

      puts(dlerror());

      return 1;

    }

  *ppbar = bar;

  pfoo();

  for(;;);

}

#include <support/test-driver.c>