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 <jmpbuf-offsets.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)[JB_RSP])) |
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)) |
35 | _jmpbuf_sp (__jmp_buf regs) |
36 | { |
37 | uintptr_t sp = regs[JB_RSP]; |
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 | |