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43 lines
1.8 KiB
C
43 lines
1.8 KiB
C
/* Copyright (C) 2003-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <setjmp.h>
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#include <stdint.h>
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#include <unwind.h>
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/* Test if longjmp to JMPBUF would unwind the frame containing a local
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variable at ADDRESS. */
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#define _JMPBUF_UNWINDS(_jmpbuf, _address, _demangle) \
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((void *) (_address) < (void *) (((long int *) _jmpbuf)[0]))
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#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
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({ uintptr_t _cfa = (uintptr_t) _Unwind_GetCFA (_context) - (_adj); \
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(_cfa < (uintptr_t)(((long *)(_jmpbuf))[0]) - (_adj) \
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|| (_cfa == (uintptr_t)(((long *)(_jmpbuf))[0]) - (_adj) \
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&& (uintptr_t) _Unwind_GetBSP (_context) - (_adj) \
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>= (uintptr_t)(((long *)(_jmpbuf))[17]) - (_adj))); \
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})
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#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
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((uintptr_t)(_address) - (_adj) < (uintptr_t)(((long *)_jmpbuf)[0]) - (_adj))
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/* We use a longjmp() which can cross from the alternate signal-stack
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to the normal stack. */
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extern void __libc_unwind_longjmp (sigjmp_buf env, int val)
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__attribute__ ((noreturn));
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hidden_proto (__libc_unwind_longjmp)
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