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1/* Copyright (C) 2003-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
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 <http://www.gnu.org/licenses/>. */
18
19#include <setjmp.h>
20#include <jmpbuf-offsets.h>
21#include <stdint.h>
22#include <unwind.h>
23#include <sysdep.h>
24
25/* Test if longjmp to JMPBUF would unwind the frame containing a local
26 variable at ADDRESS. */
27#define _JMPBUF_UNWINDS(_jmpbuf, _address, _demangle) \
28 ((void *)(_address) < (void *) _demangle ((_jmpbuf)[JB_SP]))
29
30#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
31 _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)
32
33static inline uintptr_t __attribute__ ((unused))
34_jmpbuf_sp (__jmp_buf regs)
35{
36 uintptr_t sp = regs[JB_SP];
37#ifdef PTR_DEMANGLE
38 PTR_DEMANGLE (sp);
39#endif
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)
48

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