uclibc-ng/libc/sysdeps/linux/loongarch64/jmpbuf-unwind.h

/* Examine __jmp_buf for unwinding frames.  LoongArch64 version.
   Copyright (C) 2024 uClibc-ng contributors.

   Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/

#include <setjmp.h>
#include <stdint.h>
#include <unwind.h>
#include <sysdep.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)[0].__sp))

#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 = regs[0].__sp;
  return sp;
}

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

/* We use the normal longjmp for unwinding.  */
#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)