1 /* Copyright (C) 2011-2018 Free Software Foundation, Inc.
2
3 The GNU C Library is free software; you can redistribute it and/or
4 modify it under the terms of the GNU Lesser General Public
5 License as published by the Free Software Foundation; either
6 version 2.1 of the License, or (at your option) any later version.
7
8 The GNU C Library is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 Lesser General Public License for more details.
12
13 You should have received a copy of the GNU Lesser General Public
14 License along with the GNU C Library. If not, see
15 <http://www.gnu.org/licenses/>. */
16
17 #include <setjmp.h>
18 #include <jmpbuf-offsets.h>
19 #include <stdint.h>
20 #include <unwind.h>
21 #include <sysdep.h>
22
23 /* Test if longjmp to JMPBUF would unwind the frame
24 containing a local variable at ADDRESS. */
25 #define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \
26 ((void *) (address) < (void *) demangle ((jmpbuf)[JB_SP]))
27
28 #define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
29 _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) (long) _Unwind_GetCFA (_context), _adj)
30
31 static inline uintptr_t __attribute__ ((unused))
_jmpbuf_sp(__jmp_buf regs)32 _jmpbuf_sp (__jmp_buf regs)
33 {
34 uintptr_t sp = regs[JB_SP];
35 return sp;
36 }
37
38 #define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
39 ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
40
41 /* We use the normal longjmp for unwinding. */
42 #define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)
43