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

   1 /* Examine __jmp_buf for unwinding frames.  m68k version.
   2    Copyright (C) 2006-2017 Free Software Foundation, Inc.
   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 #include <setjmp.h>
  19
  20 /* Test if longjmp to JMPBUF would unwind the frame
  21    containing a local variable at ADDRESS.  */
  22 #define _JMPBUF_UNWINDS(jmpbuf, address) \
  23   ((void *) (address) < (void *) (jmpbuf)->__aregs[5])
  24
  25 #ifdef __UCLIBC_HAS_THREADS_NATIVE__
  26 #include <stdint.h>
  27 #include <unwind.h>
  28
  29 #define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
  30   _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)
  31
  32 static inline uintptr_t __attribute__ ((unused))
  33 _jmpbuf_sp (__jmp_buf regs)
  34 {
  35   uintptr_t sp = (uintptr_t) regs[0].__sp;
  36   return sp;
  37 }
  38
  39 #define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
  40   ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
  41 #endif