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04277e02 | 1 | /* Copyright (C) 2003-2019 Free Software Foundation, Inc. |
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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 | |
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16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
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18 | |
19 | #include <setjmp.h> | |
20 | #include <stdint.h> | |
21 | #include <unwind.h> | |
22 | ||
23 | /* Test if longjmp to JMPBUF would unwind the frame containing a local | |
24 | variable at ADDRESS. */ | |
25 | #define _JMPBUF_UNWINDS(_jmpbuf, _address, _demangle) \ | |
26 | ((void *) (_address) < (void *) (((long int *) _jmpbuf)[0])) | |
27 | ||
28 | #define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \ | |
29 | ({ uintptr_t _cfa = (uintptr_t) _Unwind_GetCFA (_context) - (_adj); \ | |
30 | (_cfa < (uintptr_t)(((long *)(_jmpbuf))[0]) - (_adj) \ | |
31 | || (_cfa == (uintptr_t)(((long *)(_jmpbuf))[0]) - (_adj) \ | |
32 | && (uintptr_t) _Unwind_GetBSP (_context) - (_adj) \ | |
33 | >= (uintptr_t)(((long *)(_jmpbuf))[17]) - (_adj))); \ | |
34 | }) | |
35 | ||
36 | #define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \ | |
37 | ((uintptr_t)(_address) - (_adj) < (uintptr_t)(((long *)_jmpbuf)[0]) - (_adj)) | |
38 | ||
39 | /* We use a longjmp() which can cross from the alternate signal-stack | |
40 | to the normal stack. */ | |
41 | extern void __libc_unwind_longjmp (sigjmp_buf env, int val) | |
42 | __attribute__ ((noreturn)); | |
43 | hidden_proto (__libc_unwind_longjmp) |