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1/* Copyright (C) 2005-2019 Free Software Foundation, Inc.
2
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 License as
7 published by the Free Software Foundation; either version 2.1 of the
8 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 <http://www.gnu.org/licenses/>. */
18
19#include <setjmp.h>
20#include <stdint.h>
21#include <unwind.h>
22#include <sysdep.h>
23
24/* Test if longjmp to JMPBUF would unwind the frame
25 containing a local variable at ADDRESS. */
26#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \
27 ((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp))
28
29#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
30 _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)
31
32static inline uintptr_t __attribute__ ((unused))
33_jmpbuf_sp (__jmp_buf regs)
34{
35 void *sp = (void *) regs[0].__sp;
36#ifdef PTR_DEMANGLE
37 PTR_DEMANGLE (sp);
38#endif
39 return (uintptr_t) sp;
40}
41
42#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
43 ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
44
45/* We use the normal longjmp for unwinding. */
46#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)
47

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