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- /* Copyright (C) 2003-2019 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
- 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>
- #include <stdint.h>
- #include <unwind.h>
- /* Test if longjmp to JMPBUF would unwind the frame containing a local
- variable at ADDRESS. */
- #define _JMPBUF_UNWINDS(_jmpbuf, _address, _demangle) \
- ((void *) (_address) < (void *) (((long int *) _jmpbuf)[0]))
- #define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
- ({ uintptr_t _cfa = (uintptr_t) _Unwind_GetCFA (_context) - (_adj); \
- (_cfa < (uintptr_t)(((long *)(_jmpbuf))[0]) - (_adj) \
- || (_cfa == (uintptr_t)(((long *)(_jmpbuf))[0]) - (_adj) \
- && (uintptr_t) _Unwind_GetBSP (_context) - (_adj) \
- >= (uintptr_t)(((long *)(_jmpbuf))[17]) - (_adj))); \
- })
- #define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
- ((uintptr_t)(_address) - (_adj) < (uintptr_t)(((long *)_jmpbuf)[0]) - (_adj))
- /* We use a longjmp() which can cross from the alternate signal-stack
- to the normal stack. */
- extern void __libc_unwind_longjmp (sigjmp_buf env, int val)
- __attribute__ ((noreturn));
- hidden_proto (__libc_unwind_longjmp)
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