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

   1 /* Copyright (C) 2011-2018 Free Software Foundation, Inc.
   2
   3    The GNU C Library is free software; you can redistribute it and/or
   4    modify it under the terms of the GNU Lesser General Public
   5    License as published by the Free Software Foundation; either
   6    version 2.1 of the License, or (at your option) any later version.
   7
   8    The GNU C Library is distributed in the hope that it will be useful,
   9    but WITHOUT ANY WARRANTY; without even the implied warranty of
  10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11    Lesser General Public License for more details.
  12
  13    You should have received a copy of the GNU Lesser General Public
  14    License along with the GNU C Library.  If not, see
  15    <http://www.gnu.org/licenses/>.  */
  16
  17 #include <setjmp.h>
  18 #include <jmpbuf-offsets.h>
  19 #include <stdint.h>
  20 #include <unwind.h>
  21 #include <sysdep.h>
  22
  23 /* Test if longjmp to JMPBUF would unwind the frame
  24    containing a local variable at ADDRESS.  */
  25 #define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \
  26   ((void *) (address) < (void *) demangle ((jmpbuf)[JB_SP]))
  27
  28 #define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
  29   _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) (long) _Unwind_GetCFA (_context), _adj)
  30
  31 static inline uintptr_t __attribute__ ((unused))
  32 _jmpbuf_sp (__jmp_buf regs)
  33 {
  34   uintptr_t sp = regs[JB_SP];
  35   return sp;
  36 }
  37
  38 #define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
  39   ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
  40
  41 /* We use the normal longjmp for unwinding.  */
  42 #define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)