1 /* Examine __jmp_buf for unwinding frames. C-SkY version.
2 Copyright (C) 2018-2022 Free Software Foundation, Inc.
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
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 <https://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, \
31 (void *) (_Unwind_Ptr) _Unwind_GetCFA (_context), \
32 _adj)
33
34 static inline uintptr_t __attribute__ ((unused))
_jmpbuf_sp(__jmp_buf regs)35 _jmpbuf_sp (__jmp_buf regs)
36 {
37 uintptr_t sp = (uintptr_t) regs[0].__sp;
38 #ifdef PTR_DEMANGLE
39 PTR_DEMANGLE (sp);
40 #endif
41 return sp;
42 }
43
44 #define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
45 ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
46
47 /* We use the normal longjmp for unwinding. */
48 #define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)
49