1  /* Examine __jmp_buf for unwinding frames.  C-SkY version.
       2     Copyright (C) 2018-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library.  If not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <setjmp.h>
      20  #include <stdint.h>
      21  #include <unwind.h>
      22  #include <sysdep.h>
      23  #include <pointer_guard.h>
      24  
      25  /* Test if longjmp to JMPBUF would unwind the frame
      26     containing a local variable at ADDRESS.  */
      27  #define _JMPBUF_UNWINDS(jmpbuf, address, demangle)		\
      28    ((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp))
      29  
      30  #define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj)		      \
      31    _JMPBUF_UNWINDS_ADJ (_jmpbuf,						      \
      32  		       (void *) (_Unwind_Ptr) _Unwind_GetCFA (_context),      \
      33  		       _adj)
      34  
      35  static inline uintptr_t __attribute__ ((unused))
      36  _jmpbuf_sp (__jmp_buf regs)
      37  {
      38    uintptr_t sp = (uintptr_t) regs[0].__sp;
      39    PTR_DEMANGLE (sp);
      40    return sp;
      41  }
      42  
      43  #define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
      44    ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
      45  
      46  /* We use the normal longjmp for unwinding.  */
      47  #define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)