uclibc-ng/libc/sysdeps/linux/m68k/jmpbuf-unwind.h

/* Examine __jmp_buf for unwinding frames.  m68k version.
   Copyright (C) 2006-2017 Free Software Foundation, Inc.

   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>

/* Test if longjmp to JMPBUF would unwind the frame
   containing a local variable at ADDRESS.  */
#define _JMPBUF_UNWINDS(jmpbuf, address) \
  ((void *) (address) < (void *) (jmpbuf)->__aregs[5])

#ifdef __UCLIBC_HAS_THREADS_NATIVE__
#include <stdint.h>
#include <unwind.h>

#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
  _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)

static inline uintptr_t __attribute__ ((unused))
_jmpbuf_sp (__jmp_buf regs)
{
  uintptr_t sp = (uintptr_t) regs[0].__sp;
  return sp;
}

#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
  ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
#endif