1 /* Copyright (C) 2003-2022 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 #include <setjmp.h> 19 #include <stdint.h> 20 #include <unwind.h> 21 22 /* Test if longjmp to JMPBUF would unwind the frame containing a local 23 variable at ADDRESS. */ 24 #define _JMPBUF_UNWINDS(_jmpbuf, _address, _demangle) \ 25 ((void *) (_address) < (void *) (((long int *) _jmpbuf)[0])) 26 27 #define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \ 28 ({ uintptr_t _cfa = (uintptr_t) _Unwind_GetCFA (_context) - (_adj); \ 29 (_cfa < (uintptr_t)(((long *)(_jmpbuf))[0]) - (_adj) \ 30 || (_cfa == (uintptr_t)(((long *)(_jmpbuf))[0]) - (_adj) \ 31 && (uintptr_t) _Unwind_GetBSP (_context) - (_adj) \ 32 >= (uintptr_t)(((long *)(_jmpbuf))[17]) - (_adj))); \ 33 }) 34 35 #define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \ 36 ((uintptr_t)(_address) - (_adj) < (uintptr_t)(((long *)_jmpbuf)[0]) - (_adj)) 37 38 /* We use a longjmp() which can cross from the alternate signal-stack 39 to the normal stack. */ 40 extern void __libc_unwind_longjmp (sigjmp_buf env, int val) 41 __attribute__ ((noreturn)); 42 hidden_proto (__libc_unwind_longjmp) 43